3.2.7 Technical Provision for FGD System

VIETNAM ELECTRlCITY / TEPSCO o MON THERMAL POWER PLANT

VOLUME 6 FLUE GAS DESULPHURIZATION SYSTEM

Clause No.:

CONTENTS

g

6. 1 GENERAL .......................................................................................................... 6-1-1

6.1.1 Introduction ......................................................................................... 6-1-1

6.1.2 Design Requirements ........................................................................... 6-1-3

6.1.2.1 Basis of Design .................................................. 6-1-3

6.1 .2.2 Process Conditions ... 6-1-4 6.1.2.3 By-product Conditions ................................................ .6-1-5

6.1.2 .4 Performance Guarantee ......................................................... 6-1-5

6.1.3 Drawings to be Submitted ....................................................... ~~~~ .. ~" .6-1-7

6.2 MECHANICAL WORKS ................................................................................. 6-2-1

6.2.1 General .. .. ............... .. . .. - .," .. .. . .. .. . ....," . 6-2-1 1

6.2.2 Detail Specification .............................................................................. 6-2-3

6.2.2.1 6.2.2.2 6.2 .2 .3 6.2 .2 .4

6.2.2.5 6.2.2.6 6.2.2.7

6.2.2.8

6.2 .2.9

Limestone Storage System .................................... .6-2-3 Absorbent Milling/Preparation System ................................. 6-2-5 Flue Gas Flow System .......................................................... 6-2-7

Absorbing System.. . .. . .,.. ...... ... ..... . ......6-2-8 Gypsum Dewatermg System............ .... . ......... ..6-2-10 0 Gypsum Storage, Handling and Transportation System .. 6-2-14 4

FGD Make-up Water Supply System.. . ... ...............6-2-15 5 Building and Structure.. . .,.... ........... .... 6-2-16 Void

6.2.2.10 Materials.. ... . .... .... .,....... ... ... .. 6-2-1 7 6.2.2.11 Process Outline ................ .... ..... . .... .... .... . . .... ...6-2-17 6.2.2.12 The Margins for the Design Capacity

and Pressure of Equipment .. . ...... .. ....... . ... ... .. ..6-2-17 7

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VIETNAM ELECTRICITY / TEPSCO

6.2.3

6.2 .4

6.3 TEST AND INSPECTION ................................................................................ 6-3-1

1 6.3.1 General ........... .. ... .. .... . .......... ... ...-. ........ .. .. 6-3-1

1 6.3.2 Records and Certificate . ... ......... .. . .. ... ..... .. . . ..6-3-1

2 6.3.3 Workshop Tests.... ... .. ....... .. ... . ...... ...... .. ... ... 6-3- 6.3.3.1 6.3.3.2

General .. . . ......... ..... . ...... . . ........ ... ... ..... 6-3-2 Mechanica1 Works .. . . . . . ....... . . . .. .....6-3-3 3 6.3 .3 .2.1 Tests on Materials . . . . . . .. ......... 6-3-3 3

6.3.3 .2.2 Ultrasonic Examination .. .. . . .. ........6-3-4 4 6.3 .3 .2 .3 RadiographicExuinatlOn.. ...... . . .. ...6-3-4 4 6.3.3 .2.4 Hydrostatic Test .. . ..... . ... ..-....., ..... ..........6-3-5 6.3.3 .2.5 Pipework .. .... . ..... ..... . ., 6-3-5 5

6.3.3.2 .6 Pumps....,. . ...... ., .. .... ......,. ............... 6-3-6 6.3.3.2 .7 Fans .. .., .. ... . . ..,... .... . . . ...6-3-7 6.3 .3.2.8 Steel Structure .. ......., ".,....... .. ...6-3-7 6.3 .3.2.9 Liftin1g Equipment and Cranes .. .... ....6-3-7 6.3.3.2 .10 Insulation Material .. ....... .. ..,....-....... .. . 6-3-7 6 .3 .3 .2 .11 Lining .. . . ...,........... -. .,. 6-3-7

6.3.4 Test and Inspection at Site .................................................................. 6-3-9

6.3.4.1 General ................................................................................. 6-3-9 6.3 .4 .1.1 Inspection and Test Equipment .......................... 6-3-9 6.3 .4.1.2 General Inspection Procedure .......................... 6-3-10 6.3 .4.1.3 Painting Inspection Procedure ......................... 6-3-11

6.3.4.2 Mechanical Works ............................................................... 6-3-12 6.3 .4 .2.1 Welding and Welding Documnts .................... 6-3-12 6.3 .4 .2.2 Site Wlding Control ........................................ 6-3-16 6.3 .4 .2.3 Absorber and Other Equipment ....................... 6-3-20

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VIETNA1l1 ELECTRICITY / TEPSCO

6.3 .4.2 .4 6.3 .4.2.5 6.3 .4.2.6 6.3 .4 .2.7 6.3 .4.2.8

o MON THERMAL POWER PLANT

Unfired Pressure Vessels and Pipeworks ......... 6-3-20 Tank and Silo ................................................. 6-3-21 Rotating Equipment ......................................... 6-3-21 Lifting Equi pment ............................................ 6-3 -21 Functional Tests ............................................... 6-3-22

6.3 .4.2.9 Safety Valve Setting ......................................... 6-3-22 6.3 .4.2.10 Plant Load Tests ............................................... 6-3-22

6.3.5 Performance Test. .. . ...... ..... .. . .. ... . . .. ..... 6-3-24

6.3.5.1 General ............................................................................... 6-3-24

6.3 .5 .2 Desulphurized Flue Gas... . ..., .... . . ................6-3-24 6.3 .5.3 By-product Gypsum .. . .......... ., . ........ . . 6-3---2 5 6.3.5 .4 0ther Items 0fPerformance Guarantee .. ..... .............6-3-2 5

6.3.6 Auxiliary Power Consumption .. . . .. ........ "... ............. ...6-3-26

6.3.6.1 Auxiliary Power Consumption ........................................... 6 3-26

6.3.7 Final Acceptance . ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. ........ .. . .. .. .,.. .. .. .. .. .. .. .. .. .. .. ................ .. .. ......6-3-27

6.3.7.1 General. ... .. .. . .. .. ... .. .. .. . . ........... .. .. .. .. .. .. .. .. .. .. .. .. .. .. . .. ......, ..................6-3-27 7 6.3 .7.2 Plant Inspection Prior to Final Acceptance .. ... .. .. .. .. .. .. .. .. .. .. .. .. 6-3-2

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VIETNAM ELECTRICITY / TEPSCO o MON THERMAL POWER PLANT

VOLUME 6 FLUE GAS DESULPHURIZATION SYSTEM

6.1 GENERAL

6.1.1 Introduction

(a) This Volume cm%supply, construction, installation, testing, commissioning and inspection of Flue Gas Desulphurization System (hereafter FGD System).

(b) The quantities of equipment as mentioned in this Volume shall mean those for one (1) unit, un1ess otherwise specified.

( c) ldentical design d interchangeability shall be taken into consideration for all equipment to the maximum extend.

(d) The commercial and general technical requirements shall be covered by the Specification ofVolumes 1 and 2. The general rangement and system diagram shall be generally as indicated in the relevant Bid Drawings.

(e) The FGD system sha11 be of wet type limestone-gypsum with forced oxidation method having a capacity of 300-330 MW/one (1) absorber module. The conceptual configuration ofthe FGD system for Unit Nos. 1 and 2 is as shown in the Drawing No. OM2FD-I001 in Volume 11 , but not be limited to. (i) One (1) flue gas flow system and one (1) absorbing system shall be supplied to Unit

No. 2 exclusively. (ii) The existing stand-by equipment currently common to Unit Nos. 1 and 2 shall be

employed for Unit No. 2 as normal operating equipment. Therefore, some equipment shall be designed and installed without stand-by equipment. Other equipment, if necessary, shall be provided to ensure the completeness of the function as FGD system for Unit No.2.

(iii) FGD systems for Unit Nos. 1 and 2 shall be isolated from each other in case of two (2) units in operation simuItaneously.

(t) The FGD system shall be provided with the following, but not b limited to, components and complete accessories. (i) Wet type limestone-gypsum flu gas desulphurization systm complete with all

necessary auxiliary equipment (ii) Limestone storage system (iii) Absorbent milling and preparation system

6-1-1


(iv) Flue gas f10w system (v) Absorbing system (vi) Gypsum dewatering system (vii) Void (viii) Void (ix) FGD make up water supply system

o MON THERMAL POWER PLANT

(x) Piping, valves and thermal insulation for all systems/equipment (xi) All instrumentation and controls necessary for the safe, efficient and reliable

operation ofthe equipment included in this Specification - refer Volume 7. (xii) Structural steel required to support the FGD and other equipment within the

scope of this contract (xiii) Electric motors for plant - refer Volume 2 (xiv) Power, control and instrument cable and cabling - refer Volume 2 (xv) Cable trays, conduits and marshalling cubicles - refer Volume 2 (xvi) Grounding system - refer Volume 2 (xvii) Lighting system for all plant within the contract - refer Volume 2 (xviii) Permanent enclosures to give protection for plants and personnel against the

weather in the areas, where considered necessary (xix) All tapping points and associated valves (xx) Control valves, dampers and alllinkages, actuators and associated mountings (xxi) All local panels of the instrumentation and control shall be cooled with

air-conditioner for the safe operation of system (xxii) Spare pas and special tools

Note: The Contractor shall provide any and all equipment, materials and accessories as required for a complete set ofthe FGD system and include for installation and trial operation ofthe equipment in addition to the items specified in the above. Furthermore, the existing equipment currently common to Unit Nos. 1 and 2 are intenddto serve for Unit Nos. 1 and 2 individually anor in common, and all necessary provisions and equipment required for ensuring the completness of function as FGD system for Ut No. 2 shall be providd by the Contractor. Although not clearly specified in the above, any embedded materials for foundation, base plates, grouting materials, suppos electric motors, accessory piping, valves, instruments and blower silencers for the FGD system as weII as the piping rack foundation related to th FGD system shall be included in the scope ofwork.

6-1-2

VIETNAM ELECTRJCITY / TEPSCO o MON TflERMAL POWER PLANT

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\. ~ .. z li

6. l.2.1 Basis of Design } 3

(a) The FGD System shall be designed to reduce sulf dioxide emissions total suspended particulate emission in accordance with Vietnamese Standard in Clause 2. l.3.5. Equipment shall be sizd based on the fuel oil firing.

6. 1.2 Design Requirements

(b) The FGD system shall have a capacity to operate with full gas flow at BMCR satisfying the rquired S02 concentration at stack inlet. The flue gas conditions at BMCR * per FGD system shown below shall be specified by the Bidder.

* :BMCR: Boiler Maximum Continuous Rating

Flue Gas Flow Rate

t

V R K N

m

m

m %

JM

Flue Gas Temperature FGD inlet Sulfur Dioxide (S02)

e U J X

F 0

(c) The guaranteed performance at 100 % Rated Output is shown below.

: N ot less than 90 % : Not more than 500 mg!m3

(at 100kPa, 298K, dry) (d) The FGD system shal1 be capable of operating under the conditions stated in Clause 2.1 .4.

S02 removal efficiency at stack inlet S02 concentration at stack inlet

(e) The FGD system shall be operated whn the fuel oil is fired in the boiler.

(f) The FGD system shall be capable of operating continuously at loads equal to and above 20 % of rated out put when firing fuel oil.

(g) The FGD system shall be of proven design. Designs incorporating componnts which may be considred of prototype in nature will not be accepted.

(h) The equipment and components shall b designed and suppoed to permit free expansion and contraction without causing xcssive strains, distortion or leakag.

6-1-3


(i) Parts subject to wear, erosion, corrosion or other deterioration, or requiring adjustment, inspection or repair shall be accessible and capable of reasonably convenient removal, replacement and repair. All such parts shall be of suitable matria 1.

G) The equipment shall be designed to permit interchangeability of parts and ease of access during inspection, maintenance and repair.

6.1 .2.2 Process Conditions

(a) The FGD plant shall be designed based on the data tabled hereinafter.

(i) Desulphurized flue gas condition Desulphurized flue gas shall meet the followings:

Parameter Limit Conditions

Desulphurization efficiency N ot less than 90 % at stack inlet

S02 concentration Not more than 500 mg/m3 (at 100kPa, at stack inlet 298K, dry) Water droplet content Not more than 150 mg/m3 N, at mist eliminator outlet dry

Flue gas temperature Not less than 91 oC at stack inlet

Flue gas temperature Not less than 90 oC at stack outlet

(ii)Limestone Crushd limestone specified hereinafter will be supplied for the Absorber modules as limestone slurry.

Parameter Unit Value CaC03 content wt% 95 - 98 Analysis:

MgO wt% 0.97 Si02 wt% 0.37

Ah03 wt% 0.28 --_.--"_--

Bond work index k Wh/ton of limestone 10 (estimated) Solid limestone (density) kg/mJ 2400-2600 Solid limestone size mm less than 20

(max.50) The Bidder shall provide quantitatively the technical information along with all

6-1-4


The Bidder shall provide quantitatively the technical information aloiiwith all supporting explanation and data in case the CaC03 content is 10.'v? above one with regard to the following, but not be limited to: Evaluation ofthe impact on the performances, such as limestone ption

gypsum specification, power consumption, etc. Evaluation of the impact on the specification of the equipment fof1he Original

Bid Proposal A, such as absorber, recycle pump, limestone ball mill, vacuum filter, etc.

Evaluation of the impact on the specification of the equipment for the existing eqmpment

(iii) Make-up Water The clarified water for FGD system shall be supplied by the Water Treatment Plant. The chlorine (CI) concentration of make-up water is 50 mg/l for design of FGD system. The specification ofthe clarified water is shown in Volume 2 of 14.

(iv) Chlorine Concentration FGD system shall be designed so that the chlorine concentration in FGD system may not exceed 2,000 mg/l under any circumstances. The material exposed to the slurry shall be selected so that it may withstand 10,000 mg/l of the chlorine concentration in the slurry.

6.1.2.3 By-product Conditions

(a) Gypsum Parameter Value, Description

Purity (CaS04. 2H2 0) Not less than 95 % (dry basis) Particle size (Mean Particle Siz) Not less than 50 micron meter Moisture content Not more than 10 % pH value 5 to 8

(b) Waste water Under normal operation, the evaporated water in hot f1ue gas and moisture in gypsum will be considered to be almost balanced in water consumption in FGD and the amount of waste water to be bled off will be expected to be very small. The waste watr from FGD system shall, therefore, be treated by the waste water treatmnt facility. The accptable waste water specification is shown below:

6-1-5


Item Unit Temperature Oc < 56 pH - 5 to 8 Suspended Solid mg/l 41 ,000 Ca2+ mg/l < 500 Na+ + K+ mg/l < 2,700

Mg+ mg/l < 7,000 NH4+ mg/l < 17,100 cr mg/l 2,000 N03- mg/l 250 SO/- mg/l < 90,000 COD (Mn) mg/l < 2,700 Quantity m3/d 16

6. 1.2.4 Performance Guarantee

(a) The following items shall be guaranteed when the flue gas as stipulated in Clause 6.1.2.1 Basis of Design is led to the FGD System.

Limestone/removed sulfur dioxide ratio Limestone consumption Desulphurization efficiency (at stack inlet) Maximum S02 concentration-(at stack inlet) Water droplet content (at mist eliminator outlet) Flue gas temperature (at stack inlet and outlet: It shall be proved by the

theoretical calculation with the temperature at stack inlet that the temperature at stack outlet is not less than 90 oC.)

Byproduct gypsum conditions: purity, particle size, moisture contntandpH value

Make-up water consumption

(b) The correction curve of the guaranteed performance for each related parameter shall be submitted for approval. In case that the actual operating conditions deviate from the design conditions, the correction methods of the guaranteed performancs shall be confirmed and approved by EVN in advance of operation.

6-1-6


6.1.3 Drawings to be Submitted

The following shall be submitted as a minimum, but not be limited to:

(1) Basic Engineering Drawing List with Issue Date Basic Design Requirement . FGD System Description Process Flow Diagram and Utility Flow Diagram Material Balance Sheet or Stream Data Equipment List Capacity Calculation Sheet or Particular Study for Equipment . General Arrangement Correction Curve for Guarantee Value Anticipated Performance Curve along Full Range ofLoad Piping and Instrument Diagram (Process and Utilities) Set Point List

The Contractor shall submit Correction Curves for Guaranteed Performance and Anticipated Performance Curves on each different parneter* basis covering the range between BMCR and 20% RO for EVNs approval before the kick-offmeeting. The Contractor s negligence to the above may result in rejection of approval of all related drawings. *: The parameters shall be as follows, but not be limited to .

Flue gas conditions: FGD inlet S02 concentration including maximum S02 concentration to be anticipated in operation FGD inlet flue gas flow rate between BMCR and 20% RO FGD inlet particulate matter concentration and composition

Limestone: Purity of limestone Limestone composition

. Operating conditions: Liquid/gas ratio or no. of operating recycle pumps pH value of absorber recycle slurry

(2) Absorber . Engineering Drawing . Assembly Drawing ofIntemals, Spray nozzle, Spray pipe network, Mist Eliminator

(ME), ME wash nozzle, ME wash pipe net work, Air sparger, Air sparger network including Dimension and Material of Construction

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TRONGDUCComment on TextGiam soc

VIETNAM ELECTRICITY / TEPSCO OMONTHER1ALPOWER PLANT

Detail of Casing, Support and Structure Calculation Sheet of Absorber F oundation and Loading Data Specification of Resin Lining Lining Work Procedure

(3) Mechanical Equipment (Absorber Recycle Pump, Booster Fan, GGH, Oxidation Air Blower and Others) Data Sheet Performance Curve General Arrangement Drawing Cross Section Drawing anor Assembly Drawing of Mor Component (with material of construction)

Lube Oil & Utility Flow Diagram, if any Lube Oil & Utility Piping & Instrument Diagram, if any Foundation and Loading Data Utility List Sound Insulation Calculation Sheet, if required

(4) T:lk Sump Engineering Drawing Foundation and Loading Data Specification of Lining, if any Lining Work Procedure, if any

(5) Piping General piping rangement drawing, lists and calculations specifed in Clause 2.2.2.1.8 for the piping system in turbine island.

(6) Flue Outline Drawing of Flue and Support including Dimension and Material Calculation Sheet of Flue and Support Foundation and Loading Data of Support

(7) Construction . Installation Procedure for Absorber, GGH, BUF and Oxidation Air Blower Oil Flushing Procedure Commissioning Procedure . Mechanical Run Procedure

6-1-8


(8) Quality Assurance FGD Quality Management Manual Inspection and Test Plan Shop Test Procedure Shop Test Report Site Test Procedure Site Test Report Witness Test Procedure Witness Test Report

(5) Operation & Maintenance Operation Manual

( Maintenance Manual Overhaul Plan for Major Equipment Spare Part List (Essentia1 and Recommendable) Lube Oil List

(6) Performance/Acceptance Test

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Performance Test Procedure inc1uding Chemical Analysis Manua1 Performance Test Report

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VIETNAM ELECTRICITY ITEPSCO o MON THERMAL POWER PLANT

6.2 MECHANICAL WORKS

6.2.1 General

(a) All material, designs, procedures, calculations, manufacture, construction, inspection and testing shall conform to: (i) The Vietnamese regulations as specified in Clause 2.2.1.1 and, (ii) The criteria and recommendations of the relevant Standards and Codes of practice as specified in Clause 2.2.1.1.

(b) The FGD system complete with all auxiliaries, shall be designed, constructed and tested to conform to approved standards and shall meet the requirements of(a) (b).

(c) The FGD system shall include, but not be limited to, the following: The conceptual configuration of FGD system for Unit Nos. 1 and 2 is shown in Drawing No. OM2FD-I002 Flue Gas Desulphurization System, Process Flow Diagram in Volume 11. (i) One (1) existing limestone handling train, capable of unloading three hundred

(300) tons of limestone/four (4) hours and supplying the required limestone from the limestone ship unloader to the limestone silo The existing limestone conveyor to the limestone silo (Limestone Conveyor 01-BC-04) shall be modified to transfer the limstone to No. 1 Limestone Silo and No. 2 Limestone Silo.

(ii) One (1) limestone silo, for one (1) FGD system. The silo shall have a net storage capacity equivalent to limestone demand required for seven (7) days operation of n FGD system on the design condition

(iii) One (1) 100 % limestone slurry milling train which is one (1) of the existing two (2) trains and meets the requirements for one (1) FGD absorber system shall be employed for Unit No. 2. One (1) limestone weigh feeder, Unit 2 reagnt feed tank, pump and auxiliaries shall be provided.

(iv) One (1) 100 % capacity absorber module including oxidation system shall be provided. One (1) existing oxidation air blower shall be employed for Unit No. 2.

(v) One (1) 100 % vacuum filter train which is one (1) ofthe two (2) trains shall be employed for Unit No. 2. The vacuum filter shall dewater the spent slurry produced by one (1) absorber module.

(vi) Flue from the break point to the connection point including inletloutlet dampers and by-pass damper

(vii) Flue gas reheating system to prevent the corrosion of stack material and white smoke

(viii) Void

6-2-1

VIETNAM ELECTRICITY / TEPSCO OMON RMAL P.'RPLANT

(ix) FGD make-up water system (x) Pumps and motors (including a stand-by for each kind ofpump) (xi) Tanks and agitators, and sumps (xii) Utility piping, instrument piping and piping support

; (xiii) AIl necessa alarms, control and instrumentation system (refer to Volume 7) (xiv) AIl high and low voltage electrical equipment, cable and wiring (refer to

Volum 8) (xv) Laboratory equipment and instruments (xvi) Void (xvii) Void (xviii) Void (xix) Civil work and site construction (xx) Factory test and inspection (xxi) Commissioning and adjustment at site (xxii) Performance test

(d) The terminal points not shown in Volume 11 of 14 shall be provided by the Contractor.

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6.2.2 Detail Specification

6.2.2.1 Limestone Storage Svstem

(a) The crushed limestone of which grain size is 20 mm in average (max. 50mm) is conveyed to the limestone silo by the existing limestone bucket elevators and conveyors. The existing belt conveyor (limestone belt conveyor 01-BC-04) transfers the limestone to No. 1 limestone silo. This limestone conveyor -BC-04 shall be modified or replaced with new one of the same capacity completely, in order to supply limestone to both NO.1 Limestone Silo (existing) and NO.2 Limestone Silo (to be supplied by Unit 2 Contract). The Conveyor shall be reversible. The construction time shall be completed within a week, not to affect th limestone supply to Unit 1. In case of modification of the existing conveyo the warranty period for it shall be two (2) years even though it contains the equipment and parts supplied in Unit 1 Contract.

(b) The existing system upstream of the bucket elevator is so designed that the block of limestone is unloaded by the limestone unloader from barges (300ton/ship) at the jetty and transported to a limestone silo by the conveyors and the bucket elevators through a limestone crusher for four (4) hours .

(c) Void

(d) The conveyors have been designed, manufactured and constructed to prevent ingress of rain and emission of fine limestone particles.

(e) The existing equipment to remove effectively detonators and scrap iron is installed on the conveyor system between the limestone receiving hopper and limestone crusher.

( The block of the limestone is crushed by the existing limestone crusher installed between the limestone unloader and the limestone silo.

(g) The existing limestone crusher is designed, manufactured and constructed to prevent vibration, noise and emission of fine lmestone particles under all operating conditions.

(h) The amount of the limstone is measured with the limestone weighing measure.

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(j) One (l) silo (No.2 Limestone Silo) to be installd nearby the existing limestone silo and one (1) limestone weigh feeder shall be supplied. The limestone shall be fed by the modified limestone conveyor (01-BC-04) and shall be discharged to one (1) limestone ball mill (No. 2 limestone ball mill) through the limestone weigh feeder. The limestone silo shall be provided with one (l) spare nozzle for the future weigh feeder.

(k) le net capacity of the NO.2 Limestone Silo is equivalent to the limestone demand for seven (7) days operation of an FGD system on the design conditions but is not less than 1,000 t.

(1) All necessary provisions shall be made by the Contractor in order to employ the eXlstmg eqmpment.

(m) Specification ofthe existing equipment The specifications of the existing conveyor system and the limestone silo, for the Bidder s reference, are as follows:

. Equipment Name: Limestone bucket elevator for limestone silo Quantity: 1 Capacity: 90 h

. Equipment Name: Limestone belt conveyor 01-BC-04 Quantity: 1 Capacity: 90 t/h

. Equipment Name: NO.l Limestone Silo Quantity: 1 Capacity: 1,000 t

As for th terminal points ofthe above, refer to Volume 11 of 14.

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6.2.2.2 Absorbent MillinglPreoaration Svstem

(a) The absorbent millinglpreparation system consists of two (2) limestone weigh feders a ball mill train, a reagent feed tank and associated pumps and a agitator. The ball mill train consists of a ball mill, a mill product tank, a mill product pump, a classifier, a distributor and auxiliaries.

(b) Two (2) existing ball mill trains shall be used for Unit Nos. 1 and 2 commonly, but isolated from each other while two (2) units in operation simultaneously. The limestone shall be led to a weigh feeder from NO.2 limestone silo and to No. 2 limestone ball mill. NO.2 limestone ball mill is fed with the limestone from either of NO.l limestone silo or NO.2 limestone silo and the reclaim water from either of Unit Nos.l or 2. The limestone solids shall be ground to suitable particle size in the milling system and finally fed to Unit Nos. 1 and 2 reagent feed tanks accordingly.

(c) The system shall be capable of supplying the limestone slurry to one (1) FGD absorber system through its own reagent feed tank.

(d) The reagent feed tank shalI be installed downstream of the mi lI ing systems, to store the limestone slurry before it is fed to the absorber module. The tank shalI be sized for five (5) hours operation storage on the design conditions. Reagent slurry shalI be fed to the absorber module by the regent slurry feed system.

(e) The reagent slurry feed system of 100 % capacity shall be provided for reagent feed tank.

(f) The sump common to Unit Nos. 1 and 2 has been instalIed. The drainage from the systems shalI be collected in the sump and retumed to the system adequately by the existing sump pumps.

(g) All necessary provisions shall be made by the Contractor in order to employ the eXlstmg equipment.

(h) Specifications ofthe existing equipment The specifications of the existing ball mill system, for the Bidder s refernce are as follows:

. Equipment Name: Quantity: Capacity:

No. 1 / No. 2 Ball Mill 2 7 t1

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Motor rating:

. Equipment Name: Quantity: Capacity: Dimension: Accessory:

Equipment Name: Quantity: Capacity: Head: Motor rating:

Equipment Name: Quantity: Capacity: Dimension: Accessory:

N

m W :

m

m M

E @ H M

No. 1 / No. 2 Mill Product Tank 2 12 m3

2,438 ID x 2,753 H Agitator

No. 1/ No. 2 Mill Product Pump 2

46.8 m3fh 5 mAq 37kW

Reagent Preparation Area Sump

25 m3

3,050 x 3,050 x 3,650 H Agitator

Reagent Preparation Area Sump Pump 2 60 m3fh 18 .3 mAq 15 kW

As for the terminal points of the above, refer to Volume 11 of 14.

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6.2.2.3 Flue Gas Flow Svstem

(a) The dirty flue gas leaving the ESP (electrostatic precipitator) will flow into the absorber module through the GGH (gas-gas-heater). The dirty flue gas shall be distributed in the absorber module as even as possible.

(b) The c1ean gas leaving the absorber module shall flow through the GGH into the stack which is shown in the Drawing Nos. OM2CV-12 to 1208 in Volume 11.

(c) The bypass flue shall be provided between the FGD inlet flue and the FGD outlet flue. In the event of emergency, this 100 % bypass flue shall enable the entire flue gas to flow to the stack directly without being introduced to the FGD system.

(d) There are three shut-off pe dampers associated with the FGD system. These dampers shall be located at FGD inlet, FGD outlet and the bypass flue. During normal operation, the bypass damper is closed in order to direct the entire flue gas to the absorber module for treatment. In case where the FGD has to be bypassed for operationaI reasons, the absorber shall be isolated cIosing dampers at the inlet and outlet ofFGD.

(e) GGH system shall be provided for prevention of stack tube material from corrosion and ofwhite smoke dispersion.

(f) The sound pressure level measured at a position 1 meter distant from the machine or enclosure outline shall not exceed the values specified in Clause 2.2.1.6, at 100 % Rated Output.

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VIETNAM ELECTRICITY I TEPSCO o MON THERMAL PQ!R PLANT

:A; \:16.2.2 .4 Absorbing Svstern j

7 J* / .0)

(a) The flue gas from the electrostatic precipitator (ESP) shalI be directed thro'flue to the absorber module for removal of sulfur dioxide. The absorber mod.t:e shall consist of an absorbing section and a mist eliminator section. The flue gas shall be induced by the booster fan located downstream ofthe absorber and the GGH.

(b) Sulfur dioxide removal shall be accomplished by the absorbing slurry in the absorbing section. The sulfur dioxide shall be captured by the absorbing slurry and finally converted to calcium sulfate hydrate (CaS04 . 2H20). As the hot flue gas enters the absorber and passes through the absorbing section, the flue gas shall be quenched to saturation and sulfur dioxide shall be removed. The flue gas shall pass through the absorbing section, thereby assuring optimum liquid-gas contact, hence completing the sulfur dioxide removal process.

(c) After completing the sulfur dioxide capture, the flue gas shall flow into the mist eliminator located in the flue downstream of or in the up most position of the absorber and the water droplets shall be collected on the mist eliminator.

(d) The absorbing slurry shall be stored in the lower section of the absorber module which is referred to as the absorbing slurry tank.

(e) Fresh limestone slurry shall be added to the absorber in order to control recycle slurry pH. The agitators ofthe absorbing slurry tank shall make the solid float in the absorbing slurry.

(f) The sulphur dioxide removal process shall also involve an enforced oxidation system. This oxidation system shall force the calcium sulfite (CaS03' 112 H20) formed through the S02 removal process to be oxidized to calcium sulfate (CaS04 . 2H20). One (1) oxidation air blower having 50 % ofthe required capacity shall be supplied and one (1) ofthe existing three (3) blowers shall be employed for Unit No. 2. The capacity of each existing blower is 50 % of the required capacity. The oxidation air system for each Unit Nos. 1 and 2 consists oftwo (2) oxidation air blowers.

(g) The drainage from the system shalI be collected in the absorber area sump for Unit No. 2 and returned to Unit 2 absorber. The absorber slurry shall be transferred to the existing blow down tank and returned to the Unit No. 2 absorber by the exiting blow down return pump when the absorber is required to be empty, such as overhau l.

(h) All necssary provisions shall be made by the Contractor in order to employ the

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VIETNAM ELECTRICITY / TEPSCO o MONTHER'AL POWER PLANT

eXlstmg eqUlpment.

(i) Specification ofthe existing common equipment The specifications ofthe existing common equipment, for the Bidder s reference, are as follows:

Equipment name: Quantity: Capacity: Head: Motor rating:



No. 3 Oxidation Air Blower

5,000 m3Nfh (dry) 11 ,250 mmAq 200kW

Blow down Tank

1,864 m3

13,564ID x 14,151 H Agitator

Blow down Rtum Pump

180 m3fh 29mAq 30kW


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N W O VIETNAM ELECTRICITY / TEPSCO 6.2.2.5 Gvpsum Dewatering Svstem

(a) System flow

(i) The gypsum dewatering system shall consist of a hydroclone, a filter feed tank, filter feed pumps and a vacuum filter train. The vacuum filter train consists of a vacuum filter with associated auxiliary equipment, a reclaim water tank, a reclaim water pump and a chloride purge pump mainly.

(ii) One (1) hydroclone, one (1) filter feed tank, filter feed pumps and auxiliaries shall be supplied for Unit No. 2. Two (2) existing vacuum filter trains shall be used for Unit Nos. 1 and 2 commonly, but isolated from each other while two (2) Units in operation simultaneously. A portion of the absorbing slurry in the absorber module shall be fed to the hydroclone to control the absorbing slurry tank level and slurry concentration. The underflow of the hydroclone shall be fed to the filter feed tank. A part of the overflow of the hydroclone shall be drawn to the existing sludge storage basin in the waste water treatment facility via the existing FGD waste water transfer system.

(iii) The filter feed pump shall transfer the slurry from the filter feed tank to either of the existing two (2) vacuum filter trains. The slurry is dewatered by the vacuum filter. The dewatered byproduct gypsum is discharged to the existing gypsum conveyor and transferred to the storage area in the gypsum dewatering and storage house.

(iv) The filtrate from the vacuum filter is withdrawn to the filtrate rceiver by th vacuum pressure induced by the vacuum pump. The filtrate is withdrawn from the filtrate receiver to the reclaim water tank by the filtrate pump.

(v) The reclaim water shall be fed to Absorbent MillingIPreparation System by the reclaim pump and discharged to FGD waste water receiving tank from by Chloride purge pump. Unit No. 1 is with provided three (3) header pipes to separate the reclaim water of each vacuum filter train for Unit Nos. 1 and 2,: Pump suction header pipe for a1l pumps which connects with the reclaim tanks Pump delivery header pipe for reclaim water pumps Pump delivery header pipe for Chloride purge pumps Unit No. 2 piping shall connect with the above header pipes. The relaim water shall be fed or discharged as one for U nit Nos. I or 2 respectively from the rclaim water tanks through the header pipes by the valve operation.

6-2-10


(vi) In the event of failure of the vacuum filter train in service due to some trouble or in case of maintenance, the spent slurry produced by the absorber module is transferred to the blowdown tank and stored tentatively.

(b) Vacuum filter train

(i) The existing two (2) vacuum filter trains are used for Unit Nos. 1 and 2.

(ii) The accessory of the gypsum cake washing is provided for the vacuum filter.

(iii) The water in the slurry is removed by the vacuum system. The filter cloth restrains the cake while aliowing passage of the water and air. The filtrate drains into the filter media and then into the filtrate receiver where the air is separated from the filtrate. The vacuum pump with a liquid seal ring is provided to create the necessary vacuum.

(c) The sump common to Unit Nos. 1 and 2 has been installed. The drainage from the system shall be collected in the sump and retumed to the system adequately by the eXlstmg sump pumps.

(d) All necessary provisions shall be made by the Contractor in order to employ the eXlstmg eqUlpment.

(e) Specification of the common equipment The specifications of the existing equipment, for the Bidder s reference, are as follows:

Equipment Name: Quantity: Filter area: Product humidity:

. Equipment Name: Quantity: Type: Capacity: Head: Motor rating:

. Equipment Name:

No. 2 Vacuum Filter

14.9 m2

10wt%

No. 2 Vacuum Pump

NASH 4,320 m3N /h 68 kPa 90 kW

No. 2 Filtrate Receiver

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VIETNAM ELECTRICITY / TEPSCO o MON TlIERMAL POWER PLANT

Quantity: Capacity: 0.82 m3

Dimension 1 067 x 2,134 H

Equipment Name: No. 2 Filtrate Pump Quantity: Capacity: 25 m3fh Head: 11 mAq Motor rating: 7.5 kW

Equipment Name: Separator / Cake Wash tank 2A / 2B Quantity: 2 Capacity: 0.18 m3

Dimension 406 x 1,435 H

Equipment Name: No. 2 Cake Wash Pump Quantity: Capacity: 3 m3fh Head: 15 mAq Motor rating: 2.2kW

Equipment Name: No. 2 Reclaim WaterTa Quantity: Capacity: 105 m3

Dimension 5 500 x 5,950 H Accessorj: Agitator

Equipment Name: No. 2 RecIaim Water Pump Quantity: Capacity: 27 m3fh Head: 32mAq Motor rating: 11 kW

Equipment Name: No. 2 Chloride Purge Pump Quantity: Capacity: 4.5 m3/h Head: 13.7 m Motor rating: 4kW

Equipment Nam: Sludge Storage Basin

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20121623Highlight


Quantity: Capacity: Dimension: Accessory:



90 m3

6,000 x 6,000 x 3,000 H Agitator

Gypsum Dewatering Area Sump

25 m3

3,050 x 3,050 x 3,650 H Agitator

No.1 / No.2 Gypsum Dewatering Area Sump Pump 2 60 m3fh 18 .3 mAq 15 kW


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VIETNAM ELECTRICITY / TEPSCO o MON THERMAL P"ER PLANT x

(a) The dewatered gypsum is discharged from the vacuum filter in the dewatering area and transferred to the storage ara in the gypsum dewatering and storage house.

(b) The gypsum storage house has a capacity of 5,000 tons (equivalent to the capacity of gypsum transported ship) of gypsum storage.

(c) The stored gypsum of 5,000 tons is transferred from the gypsum storage house to the gypsum shiploader at the jetty by the gypsum reclaimer and conveyor~ for eight (8) hours.

(d) The amount ofthe gypsum shall be measured with the gypsum weighing measure.

(e) The conveyors, weighing measure and gypsum shiploader are designed, manufactured and constructed to prevent ingress of rain and emission of fine gypsum particles and to permit interchangeability of parts and ease of access during inspection, maintenance and repair.

(f) In case of supplying the by-product gypsum to domestic consumers, 20 tons capacity trucks shall be used. Such a truck shall be prepared by the consumers nominated by EVN.

(g) One (1) 2 ton capacity wheel loader is provided to scoop up the by-product gypsum on the truck.

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VIETNAM ELECTRICITY / TEPSCO o 10N THERMAL POWER PLANT

6.2.2.7 FGD Make-up Water Supplv Svstem

(a) The clarified water is used for FGD make up water system. The clarified water is supplied from the existing clarified water receiving tank to the existing FGD make-up water tank by the existing FGD mce-up water transfer pumps.

(b) The FGD make-up water is supplied from the existing FGD make-up water tank by the existing two (2) FGD make-up pumps. The necssary piping shall be provided to supply the water to Unit No. 2 FGD equipment.

(c) The mist eliminator wash water is supplied from the existing FGD make-up water tank by the existing two (2) mist eliminator wash pumps. The necessary piping shall be provided to supply the water for the mist eliminator wash.

(d) Specification of the existing equipment The specifications of the existing equipment, for the Bidder s reference are as follows:

Equipment Name: Quantity: Effective Capacity: Dimension:

. Equipment name: Quantity: Capacity: Head: Motor rating:

. Equipment name: Quantity: Capacity: Head: Motor rating:

FGD Make-up Water Tank

1,323 m3

15 510x 9,190H

FGD Make-up Water Pump 1A/ 1B 2 140 m3fh 48.8 m 55kW

Mist Eliminator Wash Pump 1 A / 1 B 2 95 m3/h 67m 37kW

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VIETNAM ELECTRJCJTY / TEPSCO o MON THERMAL POWER PLANT

shall not effect on the existing equipment and structures or minimize the effect on them and shaIl not disturb the operation of the existing equipment.

(a) FGD electrical and control building The control system and related equipment shall be installed on 1st floor in the existing electrical and control building. The electric system shall be located below the control system floor. As for the details, refer to Volume 3 of 14.

(b) Void

(c) Limestone ball mill house The roofhas been provided over the ball mill to enable the milling system to function even under inclement wcather conditions. The crane has been provided for the maintenance of each ball mill as follows: Capacity: 3 tons Span: 7,600 mm Length ofRunway: 15,300 mm Hook path: 8,110 mm

As for the details, refer to Volume 3 of 14.

(d) Oxidation air blower house The roof has been provided over the oxidation air blower to enable the air supply system to function in inclement weather conditions. The crane has been provided for the maintenance of the oxidation air blowers as follows: Capacity: Span: Lenh ofRunway: Hook path:

4 tons 10,400 mm 23 ,700 mm

5,257 mm

As for the dtails refer to Volume 3 of 14.

(e) Gypsum dewatering and storage house The roof has been provided over the vacuum filter to nable the dewatering system to

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VIETNAM ELECTRICITY / TEPSCO o MON THERMAL PO'ER PLANT

function in inclement weather. The gypsum storage house and the gypsum transportation facility are located below the vacuum filter. As for the details, refer to Volume 3 of 14.

6.2.2.9 Void

6.2.2.10 Materials

(a) Materials of construction shall be cOITosion and erosion resistant.

(b) Main piping with slurry shall be of carbon steel with the rubber lining or FRP (Fiber Reinforced Plastic) or equivalent and the tank shell shall be made of carbon steel with the flake resin lining or equivalent.

(c) Materials of the flue and its intemal support shall be steel with the flake resin lining or equivalent from the untreated gas outlet of GGH to the treated gas inlet of GGH.

(d) Materials of the flue, its intemal support and damper located in the range from the treated gas outlet of GGH to the stack inlet shall be cOITosion-resistant steel.

6.2.2.11 Process Outline

(a) FGD system shall be designed in accordance with layout and process flow diagram as shown in Drawing Nos. OM2FD-l 00 1 and OM2FD-l 002 in Volume 11.

6.2.2.12 The Manzins for the Des $m Caoacitv and Pressure ofEouioment

(a) The margins in design capacity and pressure shall be allowed for, but not be limited to, the following;

(i) Booster fan The design capacity of the booster fan sha l1 be not less than 1.1 5 times BMCR

gas treatment. The design static pressure shalI be not less than 1.25 times the pressure required

at BMCR.

(ii) Pump, GGH and Agitator The design perforrnance of this equipment shaIl be decided taking into consideration the performance deterioration due to erosion and cOITosion for each mamtenance term.

6-2- 17


6.2.2.13 Soecification ofMain Eauioment '^~

(i) Absorbing Section Quantity Materials

Absorbing Section

(a) Absorber module

One (1) per unit

Carbon steel + flake resin lining or equivalent

Spray Headers in Absorbing Section Stainless steel or equivalent

(ii) Mist Eliminator Quantity One (1) per unit Type Horizontal, vertical or equivalent Material Polypropylene or equivalent

(b) Absorber Recycle Pumps (if necessary) Quantity Four (4) per unit (One (1) is a stand-by) Type of Pump Centrifugal Casing Material Impeller Material

Carbon steel + rubber lining or equivalent Carbon steel + rubber lining, duplex alloy or equivalent

(c) Oxidation Air Blower Quantity

Type ofBlower Casing Material Impeller Material

One (1) to be supplied newly (One (1) of the three (3) existing ones also is for Unit No. 2.) Roots or equivalents Carbon steel or equivalent, if necessary Carbon steel or equivalent, if necessary

(d) Booster Fan Quantity Type

One (1) per unit Centrifugal

(e) Reagent Feed Tank Quantity Capacity Material

One (1) per unit Hold for fve (5) hours operation Carbon steel + flake resin lining or equivalnt

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VIETNAM ELECTRlCITY I TEPSCO 0 MON THERMAL POWER PLANT

(f) Limestone Silo

(g) void

Quantity One (1) per unit Capacity Seven (7) days operating demand (not less than

1,000 tons) for one (1) absorber module

6-2-19


6.2.3 Electrical Requirements

(a) Forrtlhe eeelectrlCca1 requllremmentstsofFGD SyfVolume 2 Clause 2.2.3 titled Electrical Works. Technical Schedules e FGD Electrical equipment shall follow the format ofVolume 13 Schedule 13

6.2.4 C & 1 Requirements

(a) The control and instrumentation system shall be designed to operate and control FGD system, fully and smoothly automatically following the boiler operating conditions.

(b) The control and monitoring system for the FGD System shall be provided in accordance with Volume 7 Clause 7.4.10, Clause 7.4.15 and Volume 2 Clause 2.2.3. Technical Schedules for the FGD C&I equipment shall follow the format of Volume 13 Schedule 13.6.

(c) All necessary measuring and detecting devices required for control and monitoring of the FGD plant shall be supplied and installed.

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TRONGDUCComment on Textyeu cau


6.3 TEST AND INSPECTION

6.3.1 General

(a) All costs required to caY out all tests to ensure the satisfactory design, manufacture, installation, commissioning and performance of his supply in accordance with the Specifications and Standards shall be included in the Bid.

(b) The Contractor shaIl be responsible for the timely delivery of the relevant and appropriate sections of Specification to sub-contractors, if applicable, and the proper execution of all tests on works and materials shall be supplied by sub-contractors, wherever such tests are carried out, to the same extent as if the tests on works and materials were carried out by the Contractor himself.

(c) The cost of all tests and inspections, including any repeated test or inspection carried out at subcontractors works shall be included in the B id.

(d) The Contractor shall submit to EVN inspection and test procedures covering aIl materials and equipment. Agreement shall be established on the scope of inspection and tests to be witnessed by EVN or his nominees before start of the work.

(e) If without giving necessary advance notice the Contractor carries out any test requiring the witness by EVN, such tests shall be deemed unsatisfactory and the concemed part of supply shall not be accepted.

(f) Tests not requiring the witness by EVN shall b in any case, notifid in advance. The Contractor shaIl then proceed with the tests and shaIl submit reports to EVN.

6.3.2 Records and Certificate

(a) Thirty (30) days after completion of any test, triplicate sets of all principal test records, test certificates and correction and performance curves shaIl be supplied to EVN.

(b) These test records, certificates and performance curves shall be supplied, whether or not those tests were witnessed by EVN or his nominated Representative. Th information given on such test certificates and curves shall be sufficient to identify the material or equipment to which the crtificate refers and also bear the contract reference title.

(c) Whn equipment has been tested, all test certificates shall be compild by the

6-3-1


Contractor into volumes and bound in an approved form complete wit1}iex and the copies ofeach volume shall be supplied to EVN. .~

(d) The following records and certificates shall be submitted. (i) Chemical analysis and mechanical propeies of materials (ii) Heat tratment process certificates of forging (iii) Reports of all required tests (iv) Type test certificates (v) Affidavit of compliance stating that all materials and works supplied will comply

or have complied with the applicable requirements of these specifications.

(e) The Contractor shall make the following available to EVN upon request: (i) Films of all radiographic examinations (ii) All welding procedures and performance qualification certificates (iii) All non-destructive test procedures

6.3.3 Worksbop Tests

6.3.3 .1 General

(a) Where applicable, tests must comply with the Vietnamese regulations as included in Clause 2.2.1.1.

(b) Where no specific test is specified, then the various items of plant, equipment and materials shall be tested in accordance with the applicable standard, acceptable to EVN. Where no appropriate standard is available, tests shall be caic out in accordance with the manufacturers standard practice, subject to the prior approval of EVN.

(c) All tests to be performed during manufacture, fabrication and inspection shall be agreed by EVN prior to commencement of the work. The Contractor shall prepare the details ofthe schedule and submit these to EVN for approval. It must be ensured that adequate relevant information on the design code/standard employed, the manufacture/fabrication/assembly procedure and the attendant quality control steps proposed are made available to EVN. EVN will mark in the appropriate spaces his intention to attend or waive the tests or inspections.

(d) EVN shall be notified of impending tests by the Contractor sixty (60) days in advance, and the Contractor shalI prepare all testing equipment and personnel for such tests.

6-3-2


(e) The subject items should remain available for inspection and test up to minimum ten (1 0) days after the date ofwitnessing the test unless otherwise agreed by EVN. Every facility in respect of access, drawings, instruments and manpower will be provided by the Contractor and his Sub-Contractor to enable EVN or his designated representative to caY out the necessary inspection and testing of the equipment.

(t) No equipment shall be packed, prepared for shipment, or dismantled for the purpose of packing for shipment, unless it has been satisfactorily inspected, or approved for shipment, or altematively inspection has been waived.

(g) The extent ofworkshop tests and method ofrecording the results shall be submitted to, and agreed by EVN in sufficient time to enable the tests to be satisfactorily witnessed or, ifnecessary, any changes ofthe proposed programme oftests to be agreed.

(h) AIl instruments and apparatus used in the tests shall be subject to the approval ofEVN, and, if required by EVN, shall be calibrated to an agreed standard.

(i) The cost of carrying out such calibrations shal1 be bome by the Contractor in all cases.

(j) EVN reserves the right to visit the Contractors Works at any reasonable time during fabrication of equipment in order to survey the progress made.

6.3 .3 .2 Mechanical Works

(a) The Contractor shall carry out the following test in accordance with the Standards and Specifications as included in Clause 2.2. 1.1.

6.3 .3 .2.1 Tests on Materials

(a) Representative samples and mill certificates of all plates, bars, pipes, etc., which form components of the plant shall be tested and submitted as required by the relevant approved standard or code or at the request ofEVN.

(b) AlI test pieces shall be prepared and supplid by the Contractor at his own cost. If any test piece fails to comply with the requirements ofthe specifications for the matrial in question, EVN may rct the whole ofthe material reprsented by that test piece.

(c) AII important forgings shall be xamined at the manufacturers works by jointly EVN or his nominee together with the representatives of the manufacturers during forging and heat treatment.

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VIETNAM ELECTRICITY I TEPSCO o MON THERMAL POJJRPLANT

(d) The test shalI be conducted on the fo lIowing, but no be limited to: (i) Fan Shafts

\ (e) The mill certificats shall be submitted for approval of EVN on work

equipment ofthe fo lIowing, but not be limited to: (i) Absorber (i i) Flue and Damper (iii) Structure and Reinforcing Bar (iv) Valve (v) Piping (vi) Tank and Silo (vii) Rotating Equipment

6.3.3.2 .2 Ultrasonic Examination

(a) AlI tubes and pipes for pressure piping shall be ultrasonically examined for detection of injurious defects before fabrication is started.

(b) Tube and steel plate surfaces shall be free from mill scales, etc., to allow a c1ear interpretation of ultrasonic signal. If necessary, a suitable treatment of surfaces shall be performed.

(c) Ultrasonic inspection shall be in accordance with Vietnamese Regulation and/or ASME Section 11 Sa-655, ASTM E164-94a or equivalent.

(d) Imperfections found by ultrasonic examination shall be judged against the acceptance - rejection standards outlined in ASME Code Section VIII Div.l , Appendix 12, paragraph 12.3 or equivalent.

6.3 .3 .2.3 Radiographic Examination

(a) Radiographic examination shall be the main quality control of welding; where not possible, other approved method shall be applied.

(b) For all shop welded pas the following percentage of seam shall be examined: (i) Pressure vessels : 25 %

(c) AlI pressure pas shall be tested in accordance with the requirements of Vietnamese Regulation and/or ASlE U nfired Prssure Vessel code or equivalent.

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VIETNAM ELECTRICITY / TEPSCO o MON THERlrlAL POWER PLANT

6.3 .3 .2.4 Hydrostatic Test

(a) Hydrostatic test at 150 % of the design pressure shall be carried out for a period of 30 minutes or longer at the manufacturer s factory on pressure vessels in accordance with Vietnamese Regulation and/or the ASME Code or equivalent.

(b) AlI hydrostatic tests shall be carried out prior to surface coating or painting and cast iron enclosures may be subjected to hammering as required by EVN.

(c) Hydrostatic tests of equipment manufactured of austenitic steel should be carried out using water having chloride content ofless than 30 ppm.

(d) Anti-rust additives shall be used to prevent oxidation of surfaces. As an altemative, the surface may be dried up upon completion oftests.

6.3.3.2.5 Pipework

(a) The fabricated pipework shall be tested in accordance with the standards as specified by ANSI. B31.1 /ASME B3 1.1 or equivalent.

(b) Temperature records ofhot forming and heat treatment operations shall be made, filed and submitted to EVN.

(c) The walI thickness of hot formed bends shall be checked by ultrasonic method. Records ofthese shall be kept and made available to EVN.

(d) Where random radiography is specified, this shall refer to the final weld only at EVNs selection and discretion.

(e) For the purposes ofradiographic inspection, a root pass is defined as the first complete weld run.

(t) AII piping not covered by 100 % radiography shall be tested as follows. (i) Lined piping shall be tested for leak ofwater with the f10wing water in the piping. (ii) Piping f10w without lining shall be hydrostatically tested at 1.5 times ofthe design

pressure. (iii) Piping for air and gas f10w shall be tested with pneumatic pressure.

(g) In addition to the NDT requirements stated in ANSI B3 l.l/ ASME 83 1. 1 paragraph

6-3-5

:--.""

VJETNAM ELECTRJCJTY ITEPSCO O MONTHERM'l._POWER PLANT \

136.4 or equivalent, the Contractor shall radiograph all butt welds 0/ing over 50 mm in accordance with the requirements outlined in the table belo 7

EEg

Auxiliary steam Soot blower steam

Root Pass Final Pass (After PWHT* where applicable)

None 10 % None 10 %

* PWHT : Post Weld Heat Treatment

(h) Examination shall be made on the entire weld. Percentages refer to the total number of weld and shall be representative of the range of sizes. The above requirements are applicable to both site and shop welds.

(i) All nozzles, branch connections, butt welds and attachment welds in alloy steel pipe shall be subject to magnetic particle or dye penetrative inspection.

U) Magnetic particle inspection shaIl be carried out in accordance with ASTM E709-95 or equivalent.

(k) When dye penetrative method is applied, it shall be conducted in accordance with ASTM E165-95 or equivalent and application directed by the penetrate manufacturer.

6.3.3.2.6 Pumps

(a) All pumps shall be tested in accordance wth the approved standards. Prior to any tests, the Contractor shall submit a test procedure showing the layout of the testing equipment with the positions of pressure measurement points and f10w measuring devices, for approval of EVN. In addition, the details of calibration of the f10w measuring device, motor power vs. efficiency curve, a specimen of the test record sheet and details of the performance calculations shall be provided.

(b) The performance test shall be conducted over the fu Il operating range of the pump. Curves indicating f10w rate vs. head, f10w rate vs. power consumed, and f10w rate vs pump efficiency shall be provided. In addition, the curve of f10w rate vs. NPSH required shall be providd.

(c) On completion ofthe tests the Contractor shall submit a report showing the test results obtained together with the curves corrected to the site operating conditions.

6-3-6


6.3.3.2.7 Fans

(a) Booster fan shall be subjected to full performance test including static and dynamic balancing which shall be witnessed by EVN.

(b) The test shall be in accordance with the latest applicable ASME test codes or equivalent.

6.3 .3 .2.8 Steel Structure

(a) Radiographic examination shall form the main quality control ofwelding; where not possible, other approved method shall be applied. The examination shall be applied to 25 % of all shop welded parts for main structure.

(b) Dimension check for main structure shall be carried out.

6.3 .3 .2.9 Lifting Equipment and Cranes

(a) The Contractor shall caY out the tests as required by the approved standards, to prove the capacities of cranes and lifting equipment. Test certificates shall be submitted and shall include the material Iist of equipment, welding record and non-destructive test record for electricaI equipment, wire ropes, hooks, chain blocks, shackles, runway beam, eye bolts and any other related items which are provided.

(b) Upon completion of the tests, the equipment shall be clearIy marked with the safe working load (SWL) and any other markings that EVN may require.

6.3 .3.2.10 Insulation Material

(a) The Contractor shall provide the thermal conductivity test repo for the last five (5) years applications ofthe product or shall conduct the test ofthermal conductivity in accordance with ASTM codes or equivalent.

6.3.3.2.11 Lining

(a) Alllined components ofthe plant shall be tested for proper lining in accordance with the lining manufactures instaIlation procedure and applied to the specified thickness oflining. At least the spark test for the whole lined surface and random test ofhardness shall be conducted.

6-3-7


6-3-8


6.3.4 Test and Inspection at Site

6.3 .4.1 General

(a) All equipment and plant shaIl pass tests on site as required by EVN to pro'v compliance with the specification independently of any tests which may have already been carried out at the manufacturer's works.

(b) The tests at site shall include, but not necessarily be limited to, those specified in this sectln.

(c) In paicular all functional and pressure tests on fully assembled and complete items of plant which have not been carried out at the manufacturers works, shall be caied out on slte.

(d) The commissioning shall be carried out in accordance with the requirements ofClause 2. 1. 11.

(e) The Contractor shall be responsible for all site inspection and tests as required by EVN and for the providing of the reports. Detailed proposal for all tests shalI be submitted to EVN for approval.

(f) During the course of erection ofthe plant, EVN is to have access to the plant and/or its components for inspecting the progress of the work and checking its accuracy to any extent that may be required.

(g) The Contractor shalI provide alI temporary scaffolding, ladders, platforms with adquate and safe flooring, and handrails essential for proper access of EVN or his nommees to caY out inspections.

(h) The Contractor shall also provide all personnel, materials, and instruments and other resources necessary for such tests.

6.3 .4.1.1 Inspection and Test Equipment

(a) The Contractor shaIl supply the instruments for tests and inspection of totaI plant to E'N at site (refir to Clause 5.3 .4)

(b) Before the PAC, the above instruments shall be handed over to EVN in proper working ordr.

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\ VIETNAM ELECTRICITY / TEPSCO O MON:~'I1AL POWER PLANT

;:~h ,Y:':// (c) Where necessary, specialized training for operators for any in~nents above shall be

provided and the cost associated with such training shall be included in the Bid.

(d) It is the Contractors responsibility to provide certified calibration curves for instruments, comprehensive operating and maintenance instruction manuals, electrical circuit diagrams, maintenance tools and spare parts catalogue. AIl documents shall be in clear, simple and correct English.

6.3 .4.1.2 General Inspection Procedure

(a) Equipment Arrival at Site Contractor shaIl notify EVN of arrival of equipment for any physical inspection.

(b) ErectionlInstaIlation of Equipment (i) General Inspection

During erection stage, EVN wiII inspect erection/instalIation of equipment generaIly from the foIIowing aspects.

- Any non-conformance - Workmanship - Materials used are of approved type/quality.

(ii) Official Inspection by EVN Inspection on major equipment which is listed by EVN and the Contractor wilI be made by EVNs inspection staff officially in accordance with site quality control (QC) procedure submitted by the Contractor and approved by EVN and the steps given below shalI be foIlowed.

Step 1 Request for Inspection/ Attendance (Refer Note * 1)

Note * 1

The prescribed form "Request for Inspection/ Attendance" shaIl be submitted by the Contractor to EVN twenty four (24) hours prior to the inspection and include the following information.

i) Location ofWork to be inspected ii)Purpose of inspection iii) Relevant drawings, sketches, calculation, etc iv)Reference No. of applicable document

Weekends, public holidays and times when EVN office is officially c10sed shall be not considered as notice .

AIl requests shall be registered by EVN with time/date ofreceipt stamped on each request.

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Step 2 Inspection Check Sheet Upon approval of the Step 1, EVN and the Contractor wiIl inspect e item~ in accordance with the inspection check sheet prepared by the Contractor which wiIl be handed over to EVNs inspector at site. After inspection, both parties will endorse on the above sheet as an evidence of inspection. Should there be any discrepancy, another similar inspection will be called for.

Step 3 Verification Certificate Upon completion ofthe inspection of each item, the inspection results shall be summarized in the verification certificate and reviewed by EVN.

Step 4 Conformity Certificate Upon completion ofthe inspections of all, all the inspection results will be summarized in the conformity certificate and reviewed by EVN.

6.3 .4.1.3 Painting Inspection Procedure

The painting work shall be carried out as specified in Clause 2.2. 1. 13 and inspected in accordance with the following procedures.

(a) Submission of check documents to EVN The Contractor shall submit the following documents to EVN for approval.

(i) Colors items not specified in the EVN Standards (ii) A list of paint suppliers (iii) A list of applicators (iv) A quality assurance program (v) Painting methods for corrosion resistant paints for places exposed to corrosive

conditions

(b) To check all paints and cleaning materials which are to be of approved quality

(c) To check coats which are to be produced by same manufacturer or to be of the same quality

(d) To check the cleaning works to be executed in accordance with the approved quality assurance program

(e) To check the painting works to be executed in accordance with the approved quality assurance program

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(f) Random check ofpaining coat thickness

(g) To check finish to satis:ty EVN Standards (i) Color codes to be in accordance with EVN s color code standard or that approved

byEVN (ii) Smoothness of finished surface (i ii) Rests ofthe high voltage sparking test on the surfaces to be exposed to corrosive

conditions

6.3 .4.2 Mechanical Works

6.3.4.2 .1 Welding and Welding Documents

(a) Welding works carried out by the Contractor shaIl be inspected by EVN in accordance with the requirements of Clause 2. 1. 10 and the further requirements given below.

(b) In cases where the Contractor employs subcontractors who are to caY out certain site works, e.g. non-destructive testing (ND it is stiIl the Contractor's responsibility to prepare such quali control documents related to the site works. Furthermore, it is specificaIIy requir'd that such documents shall be, after the Contractor obtains the necessy approval by EVN, forwarded to the subcontractors for their compliance. It is the Contractors responsibility to retrain, if necessary, his subcontractors' personnel anor procure additional equipment in order to meet the requirements ofthe approved quality control documents.

(c) Before commencement of the site welding, the Contractor shall prepare the following documents and submit them to EVN at site for approval.

(i) Welding Procedure Specifications (WPS) and Procedure Qualification Records (PQR)

A Il welding on pressure parts or non-pressure pas shall be carried out in accordance with the approved qualified WPS. Th Contractor shall compile all the WPS and their respective PQR to be used for site welding in one volume and submit them to EVN for approval at site before commencement ofwork. EVN shall accept any or all the WPS without prejudice to his rights to call for re-qualifications of any or all of the WPS at site, should it be deemed necessary. If such a pre-qualification is required, the WPS test shall be conductd at no extra cost to EVN, based on agreed national or international standards.

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(ii) Welders Qualification Test Procedures The Contractor shall prepare a Welders Qualification Tests Procedures summarizing the different types of site welders tests. Such test procdures shall be based on the agreed standard. The number and type of tests required shaIl be determined by the essential parameters such as:

- Welding process - Material - Filler material - Pipe or plate - Size - diameter anor thickness - Position - Type of joints - butt and/or fillet joints

Each test procedure shall be specified in detail to include, but not be limited to information on specimen size, methods oftests: non-destructive and/or destructive, assessment of test results, and rejection and acceptance criteria.

The Contractor shall prepare weld maps of all the joints to be welded at site. These weld maps shall be prepared for piping. The weld map shall show diagrammatically the location of each joint, the identification numbers of the joints (each joint shall have its own unique number), the dimensions and edge preparation of each joint and the WPS applicable. The weld maps shall be submitted to EVN at site for approval.

(iii) Weld Application Table It is mandatory that the Contractor prepares a Weld Application Table before commencement of work. A Weld Application Table is a summary of the requirements of each individual joint to be welded. An example of the format of a Weld Application Table is as below.

(Example)

System : MAIN STEAM PIPE

Joint No. Base Metals

Pipe Size, dia. x t (mm) WPSNo. PQRNo.

MSF-l SA 335 P22 SA217 WC9 406.4 x 67 55TA-SRl P-55TA-l

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VIETNAM ELECTRJCITY / TEPSCO

Filler Metal : Spec. No.

Root Run

Subsequent Runs

Preheat Temp. (oC) PWHT Procedure No. Soaking Temp. e C) Soaking Time (Minutes) Heating Rate (OC/min) Cooling Rate eC/min) NDT Required VIIPT RT MT UT Remarks

100 % 100 % 100 % 100 %

(iv) Non-Destructive Testing (NDT) Procedure All NDT to be carried out at site shall follow the approved procedures. Such procedures shall not be just a reference to or a copy ofthe agreed Standard, but shall be tailor-made, taking account of the actual works to be carried 0t at site such as the availability and type of equipment at site and the skill of NDT operators employed. The NDT equipment shall be ofwell-known make and comply with the requirements of the approved Standards.

The NDT operators shall be certified in accordance with a Certification Scheme. The Certification Scheme shall be approved by EVN. Even if an operator has been certified, EVN has the right to conduct practical tests. Such tests shall be carried out by the Contractor at no extra cost to EVN.

(v) Heat Treatment Procedures For the purpose of this Clause, heat treatment incJudes post fabrication heat treatment, pre-heat treatment and post-heat treatment of welding. The Contractor shall prepare Heat Treatment Procedures based on the agreed Code and Standard and/or Manufacture s provn practice. The procedures shall not b just a reference to or a copy of the agreed Standard, but shall be tailor-made to suit the site conditions: type of joints, accessibility, type and availability of equipment at site, and skill ofheat treatment operator employed.

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~-0~

VIETNAM ELECTRJCITY / TEPSCO

The procedures shaIl cover the fo lIowing items: method (s) ofheating

o MON TlIERMAL POWER PLANT

type of equipment, temperature recorders, thermocouple, wires, heating elements

calibration of temperature recorders and thermocouple wires; frequency of calibration

calibration cente methods of calibration number of joints to be heated at the same time number ofthermocouples per joint methods of attachment of thermocouples to joints locations of thermocouples on the joints number ofheating elements per joint size ofheating elements methods of securing heating elements to joints methods of prevention of direct heating(shorting) ofthe thermocouples

undemeath the heating elements : the use ofhigh temperature putty type of insulation blankets size of insulation blankets : width x length x thickness coverage of insulation blankets over heating elements methods of securing blankets over joints emrgency procedures : what to do if there is a temporary power cut or a

permanent power cut or shorting of the thermocouple wires, additional precautions to take during rainy weather: water chilling of joints while heating/soaking/cooling

restrssing of a joint : aHwable friquency of stress exertion the use of portable hardness-tester to check efficacy ofheat treatment confirmation of the efficacy of the heat treatment procedures by in-situ metallography

stamping/recording ofthe heat treatment recorders' charts: information needed and format

(vi) Repair Procedures The Contractor shaIl prepare a Repair Procedure based on the fabricationlwelding requirements of this Specification and approved Standards. The procedure shall be prepared in detai! enough with regard to equipment to be used, methods of repair, acceptance/rejection criteria, inspctions required, etc., taking account of the site constrants.

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VIETNAM ELECTRICITY / TEPSCO o MON THERMAL PO:vER PLANT

(vii) Other Documents The Contractor shall submit to EVN one (1) copy of other reletdocu such as mancturer's practice, technical pape where such documents .;~ng referred to in his site welding documents. '. "\:\

6.3.4.2.2 Site Welding Control

(a) In order to monitor and maintain welding quality at site, the Contractor shall establish in his site organization an independent Quality Control Section, whose function would be solely to enforce the Contractors field quality assurance programme and the site quality plans.

(b) Site Quality Control Section The Contractors Quality Control (QC) Section shall be headed by an experienced Quality Control Engineer. He shall be assisted by at least one Welding Supervisor. The Section shall be an independent one in the Contractor s Site Office and shall be under control of Contractors Company Quality System Management.

The Contractors QC Section shall keep close communication with EVN personnel in charge of Quality Assurance/Quality Control.

(c) Control ofWelders The Contractor shall employ only experienced welders. However, all welders, with or without previous qualifications, shall be tested to meet Test Procedures. Holders of current welding certificates from the relevant Vietnamese authority shall not be exempted from the test. Howver EVN site ce may, at his discrtion aIlo these welders to work if they can demonstrate their skill on five (5) production joints, of which the sizes and locations shall be selected by EVN, without any defects as revealed by visual inspection and radiography. The same rule shall apply bona fide to welders from the Contractors manufacturing works.

All welders qualification test shall be conducted, at the Contractors expense, and witnessed by EVN who makes final decision of the suitability of the welders.

In case that Vietnamese legal requiremnt asks the welders to be registered in the relevant Vietnamese authority and welders qualification test be conducted in their

mspctor s presence, it is the responsibility of the Contractor to aange for the Inspectors attendance.

The Contractor shall monitor the performance of his welders throughout the project.

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EVN may require a welder to be re-qualified ifEVN deems the skill ofthe welder has deteriorated, and the Contractor shall promptly remove the said welder from the job.

At the discretion of EVN, the re-qualification test may be conducted in the same manner as the original one or in a similar form. If a welder produces bad welds~ for example, in the spray pipe region, the re-qualification test may not be just welding a single test piece but may be welding five pipes (of which size is equal to spray pipe size) and in the similar position. All costs of re-qualification tests shall be bome by the Contractor.

(d) Control of Welding Activities The Contractor shall at all times control its welding activities in a manner whereby the quality requirement of its Field Quality Assurance Programme (FQAP) is never compromised, but at the same time no delay to the Welding progress is experienced. The Contractor shall draw up a working procedure to accommodate EVN participation at Site in accordance with the following:

Activities EVN Scope (i)Material Receiving checks 100 % Checking (ii) Cleaning of Components Spot Checking (iii)Alignment of component 100 % Checking (iv) Fit-up Checks 100 % Checking. The Contractor shall not proceed until

EVN approval is obtained. (v) Issue ofElectrodes Spot Checking

lFiller material (vi) Inspection during Spot Checking; but EVN shall witness the sta of

actual welding welding at new areas or systems. vii) Visual Inspection after 100 % Checking. The contactor shall not proceed to NDT

welding or other work until EVN gives approva l. (viii) NDT before PWHT AIl NDT shall be witnessed by EVN. For radiography,

EVN may not be present at all times. However, joints shall be selected by EVN, and the radiographs together with their Interpretation Reports shall be submitted to EVN. EVN decision on the acceptabili or otherwise, as per the agreed Standard, of the radiographs and/or the joints shall be final and binding on the Contractor.

(ix) PWHT Spot Checking during PWHT. The Contractor shall submit to EVN each joint PWHT Chart. The chart shall be stamped with the relevant data.

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VIETNAM ELECTRICITY / TEPSCO O10N THERMAL POWER PLANT

(x) NDT after PWHT All NDT ancr PWHT shalla bbeo w; scd by EVN in a manner similar to Item (viii)

(xii) Hydrostatic Test 100 % Checking Requirements that the hydrostatc test shalI be witnessed by the Inspector from the relevant Vietnamese authority, the Contractor shall aange for the said Inspectors attendance. All costs required only for conducting such tests shall be bome by the Contractor.

In all cases, the Contractor s scope shall be 100 %. In case where EVN participation is also 100 %, such inspection may be caied out jointly at the same time when the Contractor carries out his inspection. However, EVN may insist that the Contractor carries out his inspection first and correct whatever defects found before caIling for EVN participation.

The Contractor shaIl submit a daily report on welding works indicating the distribution of welders, the number and identification of joints welded, and the number and identifications of joints to be subjected to NDT and PWHT.

The Contractor shall prepare all check sheets for the inspections, and the check sheet format shaIl be approved by EVN at site. Such check sheets must be signed by the relevant pties immediately after the inspection. The Contractor shaIl submit to EVN these check sheets bound in volumes, appropriately titled when the project is completed.

The radiographic films, after review by EVN at site, shall be retumed to the Contractor. The Contractor shall then classify the films, put them in appropriately labeled boxes and store them in cIean, dry, pest-free air-conditioned room. The Contractor shall keep the films in such good conditions for the determined years after the completion ofthe project. EVN shaIl have access to these films at any time during the storage period.

(e) Control ofWelding Consumables The Contractor shall follow the manufacturers' recommendations in storage and handling of all welding consumables.

It is Contractors responsibility to confirm the purity ofwelding gases. The Contractor shall have accurate instruments for measurement of gas tlow and oxygen concentration.

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VIETNAM ELECTRJCITY / TEPSCO o MON THERMAL POWER PLANT

The Contractor shall only bring to site welding electrodes and other filler materials complying with the approved WPS.

Each consignment ofthese welding consumables to site shaIl be accompanied with the manufacturers mill certificates. The Contractor shall not change the brands of the welding consumables without prior approval ofEVN.

The Contractor shall provide electric ovens with suitable timers and temperature indicators for the purpose of preheating the welding electrodes before issuing to the welders. The quantity of electrodes issued shall only be for four (4) hour use. The contractors shall provide his welders with electrically heated quivers to cay the electrodes to working areas. Furthermore, in order to ensure compliance with the requirement that the quantity of electrodes for only four (4) hour use is issued at one time, the Contractor is required to provide two (2) colour-coded quivers to each welder, such that, for example, only red quivers are used in the morning and blue ones in the aftemoon (after lunch). It is the strict requirement of this Specification that the Contractor ensures that his welders return unused welding electrodes to store after every four (4) hour shift and fresh electrodes for use in the next four (4) hours is issued in diffrent quivers.

The Contractor shall establish and follow diligently an Electrode Record Procedure whereby the amount and type of electrodes issued to each welder at every issue are recorded in either a Record Book or Card. Such record shall be made available to EVN at site for scrutiny whenever requested.

F or fiHer matrials to be usd in TIGwlding process, the Contractor shall ensure that the filler materials are clean, dry and rust-free. They shalI also be positively identified either by using tags, colour codings, or both. Alternatively, their specification numbers shall be stamped on the rods at regular intervals in such a manner that when cut in shorter len!hs such stamps will still be visible. The f1ags or colours to identity rods shall also present in full lenh. The filler materials shall be carried to work-areas in suitable containers.

(f) Control ofNDT The Contractor shall be responsible for controlling all NDT activities under his contract, even when he sub-contracts the job to a NDT specialist company.

The Contractor shall ensure that his NDT equipment are reliable, modern, calibrated and comply with all relevant requirements ofthe agreed Standards.

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VIETNAM ELECTRICITY / TEPSCO o MON THERMAL PV,wER PLANT

The Contractor shalI employ only mature and experienced NDT ope'r#rs. The Contractor shalI ensure that the NDT operators hold current and relevant

VIETNAM ELECTRJCITY / TEPSCO o MON THERMAL POWER PLANT

be also inspected by the local authority.

(b) Lined piping Lined piping shall be tested with the f10wing water in the piping.

(c) B uried Pipework Notwithstanding any test perfonned at works, the pipework coatings shall be tested in accordance with the mentioned below.

The protective coating shaIl be inspected visually while being applied.

After priming, coating and mapping operations have been completed, the surfaces shaIl be tested with an approved electrical thickness detector. Any missed spots in the coating shaIl be repaired with overwrapping.

6.3 .4.2.5 Tank and Silo

(a) Limestone Silo The limestone silo shaIl be subjected to vacuum test in accordance with applicable standard. Equipment used for the testing shall be subject to the approval by EVN.

(b) Slurry and Water Tanks AIl ta(s operating at atmospheric pressure shalI be tested for at the minimum 30 minutes by fiIIing to maximum level and being subjected to an additional hydrostatic pressure of 15 mm Aq.

6.3.4.2.6 Rotating Equipment

(a) Rotating equipment such as fans, milIs, conveyors and pumps shaIl be subject to a running test prior to commissioning for checking correct rotation, vibration and noise.

(b) Sound pressure and vibration levels emitted from equipment shaIl be measured in accordance with approved codes and standards to demonstrate compliance with the reqUJrements.

6.3.4.2.7 Lifting Equipment

(a) After the works have been completed, all lifting equipment shall be tested to confinn correct operat lOn.

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(b) Subsequent to the satisfactory completion ofthe above tests, the tests shall be repeated in the presence of Authority in Vietnam.

t/ (c) The Contractor shall be responsible for preparing test blocks for the 6.3.4.2.8 Functional Tests

(a) All installed equipment shall be tested for correct operation and functioning.

6.3 .4.2.9 Safety Valve Setting

(a) It shall be confirmed that the settings of all safety valves are properly made as required by ASME Code or equivalent.

(b) All safety valves shall be gagged except the one to be set.

(c) For the auxiliary steamlsootblower safety valves, the setting will be made manipul

3.2.7 Technical Provision for FGD System

Documents

Transcript of 3.2.7 Technical Provision for FGD System