NORSOK M-650 (Ed. 2011)_Qualification of Manufacturers of Special Materials

This NORSOK standard is developed with broad petroleum industry participation by interested parties in the Norwegian petroleum industry and is owned by the Norwegian petroleum industry represented by The Norwegian Oil Industry Association (OLF) and The Federation of Norwegian Industry. Please note that whilst every effort has been made to ensure the accuracy of this NORSOK standard, neither OLF nor The Federation of Norwegian Industry or any of their members will assume liability for any use thereof. Standards Norway is responsible for the administration and publication of this NORSOK standard.

Standards Norway Telephone: + 47 67 83 86 00 Strandveien 18, P.O. Box 242 Fax: + 47 67 83 86 01 N-1326 Lysaker Email: [email protected] NORWAY Website: www.standard.no/petroleum

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NORSOK STANDARD M-650 Edition 4, September 2011

Qualification of manufacturers of special materials

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NORSOK standard M-650 Edition 4, September 2011

NORSOK standard Page 3 of 30

Foreword 4

Introduction 4

1 Scope 5

2 Normative and informative references 5 2.1 Normative references 5 2.2 Informative references 5

3 Terms, definitions and abbreviations 5 3.1 Terms and definitions 5 3.2 Abbreviations 7

4 Responsibilities 8 4.1 Purchasers responsibility 8 4.2 Manufacturers responsibility 8 4.3 Responsibilities of Qualifying Company 8

5 Qualification of manufacturers 8 5.1 Basis for qualification of manufacturers 8 5.2 Evaluation for acceptance 8 5.3 Acceptance of qualification 8 5.4 Proof of acceptance 8

6 Validity of qualification 9 6.1 Term of validity 9 6.2 Renewal of qualification 9 6.3 Transitional arrangements 9

7 General requirements 9 7.1 Knowledge and relevant experience 9 7.2 Manufacturing facilities and equipment 10 7.3 Sub-contractors 10 7.4 Quality requirements for test laboratories and manufacturers of welded products 10

8 Manufacturing Summary 10 8.1 Requirements for Manufacturing Summary 10 8.2 Content of the Manufacturing Summary 10

9 Heat treatment 12 9.1 Heat treatment facilities and equipment 12 9.2 Heat treatment procedure 13 9.3 Verification of heat treatment procedure 14

10 Qualification of the manufacturing process 15 10.1 Objective of qualification testing 15 10.2 Essential variables 15 10.3 Qualification testing 17 10.4 Welding procedure qualifications 20

11 Qualification test record (QTR) 20 11.1 General 20 11.2 Content of qualification test record (QTR) 20 11.3 Required copies and distribution of qualification test record (QTR) 21

Annex A (Informative) Manufacturing Summary front page and example 22

Annex B (Normative) Additional requirements to API Spec 6A:2010/ISO 10423:2009 , Annex M, and ASTM A 991 27

Annex C (Informative Verification of heat treatment procedure Example 28

Annex D (Normative) Form for Qualification Test Record (QTR) Front Page 29

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Foreword The NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety, value adding and cost effectiveness for petroleum industry developments and operations. Furthermore, NORSOK standards are, as far as possible, intended to replace oil company specifications and serve as references in the authorities regulations. The NORSOK standards are normally based on recognised international standards, adding the provisions deemed necessary to fill the broad needs of the Norwegian petroleum industry. Where relevant, NORSOK standards will be used to provide the Norwegian industry input to the international standardisation process. Subject to development and publication of international standards, the relevant NORSOK standard will be withdrawn. The NORSOK standards are developed according to the consensus principle generally applicable for most standards work and according to established procedures defined in NORSOK A-001. The NORSOK standards are prepared and published with support by The Norwegian Oil Industry Association (OLF), The Federation of Norwegian Industry, Norwegian Shipowners Association and The Petroleum Safety Authority Norway. NORSOK standards are administered and published by Standards Norway.

Introduction This edition replaces NORSOK M-650, Rev. 3. The main changes in Edition 4 are related to the following items: x clarification of scope; x definitions included or changed for Company, equalization time, heat sink, holding time, main contractor,

manufacturer, Qualifying Company, soak time and test directions; x clarification of responsibilities; x clarification of transitional arrangements between Revision 3 and Edition 4 of this NORSOK standard; x more stringent requirements to manufacturers knowledge; x requirements to test laboratories and manufacturers of welded products included; x type of etchants to be used and preparation of samples for micro examination, as applicable, shall be

stated in the Manufacturing Summary; x new clause about heat treatment with requirements to equipment, heat treatment procedure and

verification of heat treatment procedure; x changes in essential variables of the qualification tests especially regarding manufacturing equipment,

heat treatment, hipped products and start material; x changes in test requirements for flanges, other type of forgings, plates, rolled bars and valves machined

from forgings; x changes in extent and requirements to additional testing at mid-thickness for bars, forgings and hipped

(HIP) products; x otherwise editorial changes for clarification.

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1 Scope This NORSOK standard establishes a set of qualification requirements to verify that the manufacturer has sufficient competence and experience of the relevant material grades, and necessary facilities and equipment to manufacture these in the required shapes and sizes with acceptable properties. This standard is applicable to the following material grades and product forms: a) Duplex SS: all grades, product forms and dimensions b) High alloyed austenitic SS: all grades, product forms and dimensions c) Nickel base alloys: castings d) Titanium and its alloys: castings This NORSOK standard is also applicable to critical components or product forms in other materials and for special manufacturing/fabrication processes, e.g. titanium and nickel alloys in other product forms than casting, carbon steel and low alloy steel products and induction/cold bending.

2 Normative and informative references The following standards include provisions and guidelines which, through reference in this text, constitute provisions and guidelines of this NORSOK standard. Latest issue of the references shall be used unless otherwise agreed. Other recognized standards may be used provided it can be shown that they meet the requirements of the referenced standards.

2.1 Normative references API Spec 6A:2010/ ISO 10423:2009, Specification for Wellhead and Christmas Tree Equipment/Petroleum and natural

gas industries Drilling and production equipment Wellhead and christmas tree equipment

ASTM A370-11, Standard Test Methods and Definitions for Mechanical Testing of Steel Products ASTM A 703, Steel Castings, General Requirements, for Pressure-Containing Parts ASTM A 991, Conducting Temperature Uniformity Surveys of Furnaces Used to Heat Treat Steel Products EN 10204, Metallic products Types of Inspection Documents ISO 3834-2, Quality Requirements for Fusion Welding of Metallic Materials Part 2: Comprehensive quality requirements ISO 9001, Quality Management Systems Requirements ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories NORSOK M-630, Material Data Sheet for Piping PED 97/23/EC, Pressure Equipment Directive

2.2 Informative references API 6HT, Heat Treatment and Testing of Large Cross Section and Critical Section

Components ASTM E407, Standard Practice for Microetching Metals and Alloys

3 Terms, definitions and abbreviations For the purposes of this NORSOK standard, the following terms, definitions and abbreviations apply.

3.1 Terms and definitions 3.1.1 can verbal form used for statements of possibility and capability, whether material, physical or casual 3.1.2 company owner or organization that is responsible for development of and/or operation of an installation/facility Pr

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NOTE For the purpose of this standard this is normally an oil company. 3.1.3 equalization time the time used to ensure a uniform pre-set temperature throughout a heat treatment load and/or throughout all section thicknesses of a component (see also figure in Annex C) 3.1.4 heat sink separate block of material made from the same generic type of material as the parts being heat treated to monitor temperature during heat treatment 3.1.5 high alloyed austenitic SS austenitic SS with PREN 40 or Ni + 2 x Mo > 30 (Mo > 2) EXAMPLES SS type 6Mo, UNS S31266, UNS S32654, UNS S34565, UNS J95370. 3.1.6 holding time time from the controlling thermocouple (normally furnace thermocouple) has reached set temperature until the specified soaking time is completed. NOTE Holding time consist of equalization time + soaking time. (see also figure in Annex C). 3.1.7 main contractor party, which carry out all or part of the design, engineering, procurement, construction, commissioning or management of a project, or operation or maintenance of a facility on a contract awarded by Company 3.1.8 manufacturer party, including sub-contractors, which carry out operations affecting the material properties of the finished product NOTE These operations can include forming, heat treatment, etc. 3.1.9 may verbal form used to indicate a course of action permissible within the limits of this NORSOK standard 3.1.10 pitting resistance equivalent PREN PREN = %Cr + 3.3 x %Mo + 16 x %N 3.1.11 purchaser party that purchase a product from a manufacturer 3.1.12 Qualifying Company party which monitor the qualification exercise and in the end accept the resulting qualification test record (QTR) by signing and stamping the QTR front page The Qualifying Company can be the Company, the main contractor, the purchaser or a party authorised to act on their behalf. Qualifying Company shall be independent of the manufacturer. 3.1.13 shall verbal form used to indicate requirements strictly to be followed in order to conform to this NORSOK standard and from which no deviation is permitted, unless accepted by all involved parties Pr

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3.1.14 should verbal form used to indicate that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred but not necessarily required 3.1.15 soaking time time that the entire part being heat treated (throughout its cross sections) remains at the specified set temperature 3.1.16 type 22Cr duplex ferritic/austenitic stainless steel alloys with 22 % Cr EXAMPLES UNS S31803 and UNS S32205. 3.1.17 type 25Cr duplex ferritic/austenitic stainless steel alloys with 25 % Cr and PREN 40 NOTE Often referred to as super duplex. EXAMPLES UNS S S32505, UNS S32550, UNS S32750, UNS S32760 and UNS S39274. 3.1.18 type 6Mo austenitic stainless steel alloys with 6 % Mo and PREN 40 EXAMPLES UNS S31254, UNS N08367 and UNS N08926. 3.1.19 test directions test directions are defined relative to the geometry of the component to be tested For the purpose of this NORSOK standard the definitions in ASTM A370-11, sect. 4, apply with axial defined as the longitudinal axis of test specimen located parallel to the main axis of the component.

3.2 Abbreviations API American Petroleum Institute ASTM American Society for Testing and Materials CD compact disc EN European Standard HIP hot isostatic pressed IEC International Electrotechnical Commission ISO International Organization for Standardization MDS material data sheet MOM minutes of meeting NDE non-destructive examination PREN pitting resistance equivalent PWHT post weld heat treatment QTR qualification test record SS stainless steel UNS unified numbering system WPQR welding procedure qualification record WPS welding procedure specification

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4 Responsibilities

4.1 Purchasers responsibility The purchaser is responsible for ensuring that the manufacturers engaged are qualified within the essential variables of this NORSOK standard. Acceptance of a manufacturer is at the discretion and determination of the purchaser.

4.2 Manufacturers responsibility The manufacturer is responsible for establishing and maintaining required documentation and carry out verifications and testing in accordance with this NORSOK standard. A manufacturer acquiring a "NORSOK M-650 qualification" assumes an obligation to carry out manufacturing in accordance with the qualified Manufacturing Summary including its referred procedures. If an order requiring "NORSOK M-650 qualification" is outside the qualified range, as defined in 10.2, the purchaser shall be informed.

4.3 Responsibilities of Qualifying Company The qualification exercise itself shall be carried out in co-operation with and verified by a Qualifying Company. The Qualifying Company shall monitor the qualification exercise, review and in the end accept the resulting qualification test record (QTR) and as proof of the acceptance sign and stamp the QTR front page. It is important for acceptance of the QTR by other customers that the verification exercise is carried out by a recognized Qualifying Company.

5 Qualification of manufacturers

5.1 Basis for qualification of manufacturers Basis for qualification of manufacturers including their nominated sub-contractors shall be as follows: a) knowledge and relevant manufacturing experience with the type of material to be qualified (see Clause 7); b) acceptable manufacturing facilities and equipment (see Clause 7 and Clause 9); c) established Manufacturing Summary (procedure) covering all manufacturing steps from melting or semi

product to finished products (see Clause 8); d) an established heat treatment procedure (see Clause 9); e) manufacturers quality system, which shall fulfil the requirements of ISO 9001; f) results of testing in compliance with this NORSOK standard (see Clause 10).

5.2 Evaluation for acceptance The Qualifying Company shall carry out a review of the manufacturers facilities, equipment, implementation of procedures and documentation as required by this NORSOK standard at the manufacturers and sub-suppliers premises. The evaluation for acceptance shall concentrate on facilities and equipment for melting, refining, forming, welding, heat treatment, etc. The review shall be carried out by technical competent personnel, with knowledge of metallurgical aspects of the applicable alloys, including precipitation diagrams, effect of hot forming, welding, heat treatment, etc., and who has experience relevant for the manufacturing process to be evaluated. The result of the evaluation shall be documented in an evaluation report or a MOM.

5.3 Acceptance of qualification A complete QTR with content in compliance with Clause 11 shall be established for possible acceptance.

5.4 Proof of acceptance The original signed and filled in QTR front page is the only valid proof of being accepted according to this NORSOK standard. Pr

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NOTE There is no official listing in the name of NORSOK of accepted manufacturers according to this NORSOK standard.

6 Validity of qualification

6.1 Term of validity The validity of a qualification is 5 years from the date of acceptance (signing) of the QTR front page. The qualification is valid within the parameters specified in 10.2.

6.2 Renewal of qualification Renewal of the qualification shall be carried out as follows: a) a manufacturer with regular production of the originally qualified products and alloys is considered re-

qualified and additional testing is normally not required. It is a pre-requisite that all test requirements in the current revision of this NORSOK standard are complied with;

b) evaluation and review at the manufacturers and sub-suppliers premises according to 5.2 shall be carried out by the Qualifying Company;

c) the Manufacturing Summary and referred procedures shall be reviewed, updated and a decision made whether retesting is required;

d) the heat treatment procedure and its corresponding verification, see 9.3, shall be reviewed, and a decision made whether a new verification is required;

e) a minutes of meeting (MOM) listing actual parts of the QTR which shall be updated and with conclusions for renewal of the qualification shall be included in the re-qualified QTR;

f) a new QTR front page shall be established and properly signed.

6.3 Transitional arrangements Subject to purchasers acceptance, Revision 3 qualifications are considered to fulfil the Edition 4 requirements of this NORSOK standard until the validity of the Revision 3 qualification expires on the conditions stated below. There are no transitional arrangements for flanges or valves machined from forgings. For these products it is presupposed that the qualification shall be in accordance with Edition 4 of this NORSOK standard. Transitional conditions are as follows: a) the Manufacturing Summary, see 8.2, is updated, and a heat treatment procedure, see 9.2, is

established/updated; b) verification of the heat treatment procedure, as specified in 9.3, has been carried out; c) the additional test requirements in 10.3.3, as specified for selected product forms in Table 2, are fulfilled. In such case a statement shall be included in the box Other information on the original Revision 3 QTR front page and signed off by the Qualifying Company. The original Revision 3 validity date shall be maintained.

7 General requirements

7.1 Knowledge and relevant experience

7.1.1 Knowledge The manufacturer shall have in-house knowledge of relevant metallurgical aspects of the applicable alloys including precipitation diagrams, effects of hot forming, welding, and heat treatment parameters, etc. as applicable for his manufacturing process.

7.1.2 Relevant experience The manufacturer shall have relevant experience with manufacture of the type of material to be qualified. Relevant experience should be supported by statistical data presented in the form of a histogram for key parameters, e.g. tensile strength, impact thoughness, corrosion resistance, etc. In addition a relevant reference list from the last 2 years production for the products, materials and the range of sizes to be qualified shall be included. Pr

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New manufacturers with less than 2 years of documented production for actual product and material may be qualified to this NORSOK standard, but with a validity period limited to 2 years, after which a new evaluation shall be carried out. A note to this effect shall be included on the QTR front page.

7.2 Manufacturing facilities and equipment Facilities and equipment shall be fit for purpose, regularly maintained and calibrated as required. Requirements for heat treatment facilities and equipment are further described in 9.1.

7.3 Sub-contractors If parts of the production are carried out by a sub-contractor, the manufacturer is responsible for ensuring that the sub-contractor meets the requirements of this NORSOK standard for the manufacturing steps that the sub-contractor is performing.

7.4 Quality requirements for test laboratories and manufacturers of welded products

7.4.1 Test laboratories

Test laboratories shall have a quality system in accordance with the principles in ISO/IEC 17025 or equivalent. The laboratories should hold a national accreditation.

7.4.2 Manufacturers of welded products Manufacturers of welded products shall comply with the principles specified in ISO 3834-2.

8 Manufacturing Summary

8.1 Requirements for Manufacturing Summary The manufacturer shall have a Manufacturing Summary for each production route, type of product, grade of material and size range. NOTE Sometimes it can be convenient to combine several production routes, type of products and/or grade of materials into one Manufacturing Summary, e.g. as shown in the flow chart in Annex A. The Manufacturing Summary shall describe, step by step in a logical and correct sequence, all important manufacturing activities with reference to detailed procedures. A short description and the main parameters for each activity shall be included. Each production route shall be illustrated with a flow chart. If the manufacturer has different plants or different production routes for a product, separate documentation is required for each of these. If essential parts of the work (e.g. forming, heat treatment, pickling, etc.) are subcontracted, this shall be identified in the documentation. The documentation shall then include the name and address of each subcontractor and the relevant documentation from the subcontractors equipment and procedures. The Manufacturing Summary is the property of the manufacturer. Distribution is at the manufacturer's discretion.

8.2 Content of the Manufacturing Summary

8.2.1 Scope The scope of the Manufacturing Summary shall be clearly defined by stating a) name and address of manufacturer, b) grade of material (UNS number) with reference to standard and MDS, c) type and size range of products for which the Manufacturing Summary applies, d) identification of the manufacturing process.

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8.2.2 Content

8.2.2.1 General The Manufacturing Summary shall include, but not be limited to, the requirements in 8.2.2.2 to 8.2.2.15.

8.2.2.2 The product type and the manufacturers requirements (purchasing specification) regarding start material. Apply especially when semi finished products such as ingot, bar, pipe, plate, strip, etc., are used as a basis for the manufacture. In such cases the manufacturer of the start material shall also be given.

8.2.2.3 Manufacturers inspection of start material on reception.

8.2.2.4 Melting shop including a) melting and refining processes, b) casting method, e.g. ingot, continuous cast, etc.

8.2.2.5 Foundry including a) melting and refining processes, b) handling of and maximum percentage of eventual return scrap, c) casting process, e.g. investment, centrifugal, sand castings, etc., d) moulding method, type of sand, binding agent and method of casting.

8.2.2.6 Hot forming including a) all hot forming processes such as forging, pressing and rolling with information about size and thickness

range of each hot forming process, b) maximum and minimum hot forming temperatures and how these temperatures are controlled, c) possible reheating cycles, d) method of cooling after completion of the hot forming process, e) minimum forging ratio including how the forging ratio is calculated, f) sketch illustrating each step in the forming process, see Annex A.

8.2.2.7 Heat treatment including a) description of heat treatment cycle, e.g. loading temperature, heating rate, set temperature with tolerances

and holding- and soaking times. For continuous and semi continuous furnaces according to 9.2.4, b) cooling details, e.g. cooling medium (water, air or combination thereof, etc.), type of cooling (quenching,

spraying, etc.), relevant parameters (temperatures of quenching bath, for spraying medium velocity, type and size of nozzles, etc.),

c) reference to the specific heat treatment procedure according to 9.2.

8.2.2.8 Blasting/cleaning equipment, including the type of grit.

8.2.2.9 Pickling.

8.2.2.10 Welding (including weld repair). The WPS and PQR applicable for the qualification shall be listed.

8.2.2.11 PWHT (if applicable).

8.2.2.12 Type of NDE and inspection methods.

8.2.2.13 Production testing including a) type of tests to be carried out, b) test sampling, which shall be identified as a separate activity and described in the correct sequence in the

Manufacture Summary, c) sketches showing typical samples with dimensions for production tests with location and orientation of test

specimens, d) procedure for preparation of specimens, etching and examination of microstructure including types of

etchants used preferably with reference to one of the etchants listed in ASTM E407.

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For duplex steels in particular more than one etchants may be required for detecting intermetallic phases, carbides and nitrides.

8.2.2.14 Description of the material traceability system.

8.2.2.15 A list of applicable procedures. An excerpt from a typical Manufacturing Summary is included in Annex A as an example.

9 Heat treatment

9.1 Heat treatment facilities and equipment

9.1.1 General Heat treatment facilities and equipment shall fulfil the requirements in 9.1.2 to 9.1.8. In addition, API 6HT should be used as a guideline.

9.1.2 Foundries Foundries shall have heat treatment facilities within their own premises or they shall be located in their close vicinity.

9.1.3 Heat treatment furnaces Heat treatment furnaces shall be adequately dimensioned for the loads to be heat treated. Electrical furnaces shall have mechanical means of circulating the air during heating. The only exception is cases where it can be documented through verifications (see 9.3) that uniform heating is achieved without forced circulation. Furnaces shall be equipped with automatic temperature indicating, controlling and recording devices, which shall possess an accuracy of 1 % of their full scale range. A temperature uniformity survey of the quality heat treatment furnaces shall be carried out annually in accordance with API Spec 6A:2010/ISO:2009, Annex M, ASTM A 991 or equivalent and additional requirements given in Annex B. The initially temperature uniformity survey shall be carried out with maximum load in the furnace. Subsequent temperature uniformity surveys may be carried out with empty furnace.

9.1.4 Thermocouples Thermocouples shall be calibrated and fulfil the requirements of API 6A (Twentieth Edition)/ISO 10423:2009, Annex M.

9.1.5 Quenching baths Quenching baths shall have dimensions and cooling facilities adequate to keep the water temperature below 50 C at any time during the quenching operation. The quench tank shall be equipped with pumps or propellers to ensure satisfactory circulation and agitation during quenching. Quenching facilities should include provisions for internal cooling for the quenching of products with penetrating bores such as pipes. The quenching bath shall be equipped with continuous temperature monitoring/recording devices.

9.1.6 Loading of components Pallets or other fixtures shall be used for placing parts during heat treatment and quenching to ensure free circulation of air and water between each component. Parts shall not be placed directly onto the furnace floor. Piling of components in baskets is not allowed.

9.1.7 Transfer time between furnace and quenching bath The equipment shall be capable of transferring materials from heat treatment furnace into quenching bath within a maximum of 60 s for alloys requiring water quenching. Pr

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For large components it is recognised that a transfer time of 60 s may be difficult to achieve. In such cases a longer transfer time may be specifically qualified. Qualification tests shall comprise both thin and heavy sections of such components as agreed with the Qualifying Company. Details of the extended transfer time including for, which products it is applicable for, shall be highlighted on the QTR front page. The transfer time is measured from the time the furnace door is fully open or the furnace roof is fully removed and until the component(s) is completely submerged into the quenching bath.

9.1.8 Continuous furnaces and induction furnaces Continuous furnaces and induction furnaces shall generally fulfil the principles stated above. A specific evaluation shall be made in each case.

9.2 Heat treatment procedure

9.2.1 General A specific heat treatment procedure shall be established. Content of the procedure shall as a minimum be as given in 9.2.2 to 9.2.6.

9.2.2 Description of heat treatment facilities and equipment The following information shall be included: a) type and identification of furnace(s); b) sketch of furnace showing, overall dimensions, working zone and location of burners as applicable; c) location and identification of pyrometers and/or thermocouples in the furnace for control and recording

respectively. For continuous furnaces the heating zone and the working zone shall be clearly defined; d) maximum operating temperature of furnace(s); e) description of how temperature is controlled; f) cooling facilities; g) sketch of heat treatment facilities showing furnace(s) and quenching bath relative to each other.

9.2.3 Loading and unloading of components and transfer between furnace and quenching bath The following information shall be included: a) stacking of components in furnace and during quenching (sketch to be prepared); b) method(s) for unloading of components from furnace. If several pallets/components are heated in the

furnace at the same time the unloading of these should be especially addressed; c) maximum transfer time of components from open furnace door until components are completely

submerged in quenching bath.

9.2.4 Description of heat treatment cycle The following information shall be included: a) loading temperature, heating rate, set temperature with tolerances and holding- and soaking time; NOTE For definition of holding- and soaking time see figure in Annex C, 3.1.6 and 3.1.15. b) cooling details, e.g. cooling medium (water, air, gas or a combination thereof, etc.), type of cooling

(quenching, spraying, etc.), relevant parameters (temperatures of quenching bath, for spraying medium velocity, type and size of nozzles, etc.);

c) for continuous and semi continuous furnaces: travel speed and minimum soaking time as function of size (e.g. thickness, diameter, cross section, etc.) of products to be heat-treated and other relevant parameters.

9.2.5 Production testing and traceability The following information shall be included: a) principles for selection of components to be used for production testing within each heat treatment load.

(sketch to be prepared) taking into account that selection should be from the center close to the bottom of a heat treatment load;

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1) how traceability of heat and heat treatment lot is ensured throughout the whole heat treatment process, 2) how components within each heat treatment load are identified, 3) how components used for production testing in each heat treatment load are identified.

9.2.6 Documentation of heat treatments A description of the following shall be included: a) how the temperature cycle is recorded and documented; b) follow up and documentation of maximum temperature of quenching bath during quenching; c) how documentation of the heat treatment loads is carried out [via photographs (preferred) or loading map]; d) actual location of components used for production testing in each heat treatment load.

9.3 Verification of heat treatment procedure

9.3.1 General Verification is required of procedures for heat treatment except for stress relieving heat treatment in accordance with this NORSOK standard.

9.3.2 Objective The objective of the verification is to ensure that the specified parameters in the established heat treatment procedure are correct by comparing the readings of the furnace controlling thermocouple and the contact thermocouples fixed onto the load/components. The verification shall especially verify that a) all components in a heat treatment load reach the specified set temperature throughout their thickness, b) the soaking time is not started before the load/components have actually reached the minimum heat

treatment temperature specified in the procedure. For guidance see API 6HT (first edition), sect. 6.3.1.6.

9.3.3 Extent of verification The verification shall be carried out for each furnace used for quality heat treatment using the heaviest load and/or most dense packed load to be heat treated. Manufacturers or heat treatment contractors having several heat treatment procedures shall verify the most extreme conditions (e.g. a combination of shortest soaking time, shortest heating time, highest set temperature) in their procedures to minimise the number of verifications required. After a major re-furbishment of a furnace or after a furnace modification changing the heating parameters, a new verification shall be carried out.

9.3.4 Procedure for the verification The verification shall be carried out as follows: a) contact thermocouples shall be fixed onto the surface of at least three components which are respectively

located in the middle of the heat treatment load and in two corners of the load diametrically opposite to each other;

b) for heavier components holes shall be drilled into the components down to mid-thickness and the thermocouples placed into the holes. The holes should be at least 100 mm from the second surface of the component. To avoid damaging the components heat sinks may be used, which shall be made from the same general type of material as the parts being heat treated. The cross section of the heat sink shall be equal to that of the heaviest cross section of the parts being heat treated and the dimensions such as to allow for location of the drilled hole as specified above. The number and location of the heat sinks shall be as specified in a) above;

The definition of heavier component varies with the type of component (e.g. plate, pipe, fitting, forging, casting, etc.) of the component and shall be agreed in each case also taking into consideration the proposed soaking time in the heat treatment procedure for the component. c) readings from the contact thermocouples shall be compared with the readings from the controlling

thermocouple of the furnace by superimposing the time temperature curves from the contact thermocouples onto the curve from the controlling thermocouple of the furnace. Pr

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See the example in Annex C; d) the manufacturer shall establish a procedure describing how the verification is proposed to be carried out

including how the mid-thickness temperature will be checked. The procedure shall be accepted by the Qualifying Company prior to start of the verification.

9.3.5 Reporting A report shall be established identifying the furnace verified, describing the heat treatment load used and location of thermocouples within the load (photograph). The superimposed time temperature curves from the contact thermocouples and the controlling thermocouple(s) of the furnace shall be included in the report.

9.3.6 Witnessing The verification of the heat treatment procedure shall be witnessed by the Qualifying Company, who also shall sign the final report onto completion of the verification exercise.

10 Qualification of the manufacturing process

10.1 Objective of qualification testing The manufacturing process as described in the Manufacturing Summary shall be qualified by testing of actual products in order to a) demonstrate that the proposed manufacturing route and production parameters result in products meeting

the specified requirements, b) verify that the proposed production test sampling gives results, which are representative of the properties

of the actual components they represent.

10.2 Essential variables

10.2.1 General A change in one or more of the manufacturing parameters stated in 10.2.2 to 10.2.13 requires re-qualification of the manufacturing process.

10.2.2 Thickness limitations and weight The maximum qualified weight and thickness shall be according to limits given in Table 1, but shall in no case exceed the limits specified in the Manufacturing Summary.

Table 1 - Qualified maximum thickness and weight for applicable products

Type of product Type of material Tested thickness

(T)

mm

Qualified thickness

mm

Weight of tested

component (G) kg

Qualified weight

Strip, plate, pipe, tube and wrought fittings

High alloyed austenitic SS + SS type 25Cr duplex

T d 40 T + 25 %, maximum 40

N/A N/A

T > 40 T SS type 22Cr

duplex T d 60 T + 25 %,

maximum 60 N/A N/A

T > 60 T Castings, forgings, bars and HIP

High alloyed austenitic SS, Ni-alloys + SS type 25Cr duplex

T d 60 T + 10 %, maximum 60

G d 250 G + 100 %

T > 60 T G > 250 All SS type 22Cr

duplex T d 120 T + 10 %,

maximum 120 G d 250 G + 100 %

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Type of product Type of material Tested thickness

(T)

mm

Qualified thickness

mm

Weight of tested

component (G) kg

Qualified weight

T > 120 T G > 250 All Titanium T T + 25 % G d 150 G + 100 % G > 150 All Investment castings

All T T + 25%, maximum 60 mm. Above 60 mm as for Castings.

N/A N/A

10.2.3 Material grade A change from one material grade to another, e.g. change from one UNS No. to another UNS No.

10.2.4 Melting and refining equipment A change in the final melting/refining process.

10.2.5 Manufacturers of start materials A change of manufacturer of start material. The start material is defined as ingots, billets, blooms, plates, pipes, etc. used to manufacture a final product as flanges, fittings, valve bodies, etc. This requirement may be disregarded if a) the manufacturer of start material holds a valid NORSOK M-650 qualification for the specific start material, b) it can be documented that the specific start material from a manufacturer already has been used in other qualifications for the same grade of material.

10.2.6 Manufacture at different plants and/or locations If production is carried out at different plants/locations, a separate qualification is required for each plant. This applies also for a change of sub-contractors for essential operations such as heat treatment, HIPing, etc.

10.2.7 Manufacturing equipment A change in manufacturing equipment, as described in the Manufacturing Summary, that can negatively influence the product properties. This applies also if the manufacturer has several alternative manufacturing routes for a product.

10.2.8 Castings Change of moulding method typically between a) sand moulding (sand castings), b) ceramic moulding (investment castings, e.g. lost wax-, unicast-, shaw method, etc.), c) graphite moulding (titanium castings only), d) change of casting technique between static casting, centrifugal casting, or vacuum casting. This is not

applicable for titanium castings, which shall always be cast in vacuum, e) change of HIPing parameters (significant changes in temperature, pressure, time, vacuum ) or HIP

equipment (titanium castings only).

10.2.9 Forgings Change of the following: a) open die and ring rolled product forms;

Separate qualifications shall be carried out for flanges, bars, rings, discs, etc.

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b) closed die forgings. Components for testing shall have a section thickness in the upper thickness range specified by the Manufacturing Summary.

10.2.10 Hot isostatic pressed (HIP) products Change of a) the manufacturer of powder for HIP, b) HIP parameters (significant changes in temperature, pressure, time, vacuum) or HIP equipment.

10.2.11 Hot forming A change from one forming method to another and a change of forging temperature outside the established and qualified tolerances. Typical examples are a) from rolling to forging or vice versa, b) from die forging to open die forging or vice versa, c) from hammer forging to press forging or vice versa, d) from hot pressing to extruding or vice versa, e) from hot to cold forming/rolling or vice versa, f) change of cooling method after hot forming from water quenching to any other cooling method.

10.2.12 Welded products For manufacture of welded pipe and fittings a change of WPS does not require re-qualification, provided the requirements of NORSOK M-630 are fulfilled, except from the following: a) changes from double sided to single sided welds; b) change in welding method or combination of welding methods.

10.2.13 Heat treatment The following apply: a) change of heat treatment temperature outside the allowable range. The allowable range of heat treatment

temperature shall be within 10 qC to +30 qC from the temperature used for the qualification testing of the component;

b) change of heat treatment cycle, e.g. from a one step to a two step cycle or vice versa; c) reduction of holding and/or soak time to a time shorter than that established during the verification of the

heat treatment procedure; d) change from furnace heat treatment to induction heat treatment or vice versa; e) change from batch furnace heat treatment to continuous furnace heat treatment or vice versa; f) for hot finished seamless pipes only: change from furnace heat treatment to direct quench from hot finish

operation or vice versa; g) change in quench medium from water to polymer, oil, nitrogen, air and similar or vice versa; h) change in quenching method from quenching in bath to spray quenching or vice versa.

Change or re-furbishment of the heat treatment furnace within the same premises does not require re-qualification provided the requirements in Clause 9 are fulfilled.

10.3 Qualification testing

10.3.1 Selection of components for testing The selection of components for testing and test sampling shall be as agreed with Qualifying Company. Components for testing should have a section thickness in the upper thickness range specified by the Manufacturing Summary. Except for castings and open die forgings the components shall be representative in geometry of what actually shall be manufactured. Castings and open die forgings selected for testing shall be actual products, i.e. not test blocks. For castings qualification should be carried out on a cored component, e.g. valve body. For forged flanges, contour forged valves and similar products where production testing is planned to be carried out on an integral prolongation such a prolongation shall be integrated in the qualification test forging. Pr

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Components for testing shall be from regular production or from test production manufactured according to the normal manufacturing route and with regular production equipment.

10.3.2 Testing

10.3.2.1 Certification of test sampling and test results All extraction of test samples and testing specifically related to the qualification tests shall be certified in accordance with EN 10204, Type 3.2.

10.3.2.2 Extent of testing for qualification Testing for qualification shall as a minimum comprise a) production testing with test sampling as specified in NORSOK M-630: MDSs, other applicable standard

and/or the Manufacturing Summary, b) additional testing for qualification according to Table 2, c) for forged flanges, contour forged valves and similar products with integral prolongations testing shall be

carried out on both the prolongation and the product itself. d) non-destructive testing as specified in NORSOK M-630 and relevant MDSs and/or other relevant material

specifications. The type of tests to be performed and minimum requirements shall be as specified in NORSOK M-630 and relevant MDS (or material standard/specification if materials are not covered by a MDS).

10.3.2.3 Requirements for materials requiring impact testing For materials requiring impact testing, the requirement for base material shall be 20 J higher than the production test requirements. This does not apply to the additional testing specified in 10.3.3 or to the testing in position 2 for flanges. NOTE For qualification of dimensions outside the range specified by the respective MDSs special acceptance requirements may be agreed, e.g. exception to the requirement for the impact test results to be 20 J higher during qualification than the production test requirements. In such cases this shall be clearly stated onto the QTR front page.

10.3.2.4 Acceptance of production testing from integral prolongations from forged products To accept production testing to be taken from the prolongation the test results from the prolongation shall be representative of the properties obtained from the same position of the sacrificial product, e.g. position 1 (TH /2) for flanges. It is at the discretion of the Qualifying Company to decide what is representative, i.e. an acceptable difference between results from tests located in the prolongation and in the product itself.

Table 2 Testing required for qualification

Type of product Sample for

production test Additional tests for qualification

All products Test sampling as specified in the MDS and/or the Manufacturing Summary.

Type, number and location of tests as specified in the MDS and material specification unless otherwise specified in this table.

A sketch shall be prepared with dimensions of production test samples and tested components tested for qualification. The location and orientation of test specimens shall be shown. The components used for qualification should in addition be documented with photographs.

Castings Integral or gated test blocks. Production test blocks shall be tested as part of the qualification testing.

Tests from thin and thick sections of a sacrificial casting.

Dished heads From over-length of the component.

Tests shall be carried out from the over-length and from the deformed area of the component. For dished heads made of Pr

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Type of product Sample for production test

Additional tests for qualification

plates and welded together prior to forming the tests shall include a weld.

Flanges all manufacturing methods

Sacrificial flange or an integral prolongation.

Qualification testing shall encompass testing of a sacrificial flange in both the flange neck and flange ring, position 1 (TH /2) and position 2 (TB/2) respectively, as shown in the respective MDSs. In position 1 impact testing shall be taken in both axial and tangential direction. The minimum absorbed energy for impact tests in Pos. 1, tangential direction, shall be minimum 27 J/20 J (average/single values) tested at -46 C.

Forgings closed die. Sacrificial forgings.

Additional testing according to 10.3.3 shall be carried out if section thickness exceeds 50 mm for all materials requiring impact- or corrosion testing according to MDS/ applicable specifications. Other additional testing may be required depending on shape and functionality of the forging as agreed with purchaser and Qualifying Company.

Forgings - open die Tests from prolongation on actual forging or from sacrifical forging.

Additional testing according to 10.3.3 shall be carried out if section thickness exceeds 50 mm for all materials requiring impact- or corrosion testing according to MDS/applicable specifications. Other additional testing may be required depending on shape and functionality of the forging as agreed with purchaser and Qualifying Company.

HIP components except flanges

Integral test blocks. Testing shall be made from thin and thick sections of a sacrificial product. Except for the additional testing test results shall fulfil the requirements in the respective MDSs . Additional testing according to 10.3.3 shall be carried out if section thickness exceeds 50 mm for all materials requiring impact- or corrosion testing according to MDS/applicable specifications.

Plates

Cut from plate. Both ends on one plate shall be tested with three sets of tests at each end located in the middle and at each edge. Test specimens shall be located in the mid-thickness.

Ring rolled products Tests from prolongation on actual forging or separate forged test ring.

Additional testing according to 10.3.3 shall be carried out if section thickness exceeds 50 mm for all materials requiring impact- or corrosion testing according to MDS/applicable specifications.

Rolled and forged bars

Cut from over-length of bar.

Tests shall be carried out at one end and in the mid-length position of one bar. Additional testing according to 10.3.3 shall be carried out if section thickness exceeds 50 mm for all materials requiring impact- or corrosion testing according to MDS/applicable specifications.

Seamless pipe and tube

Cut from over-length of pipe

One pipe/tube shall be tested at one end and in the mid-length position.

Strip Cut from strip. One end on one coil shall be tested with three set of tests at each end located in the middle and at each edge.

Valves machined from forgings

Tests from prolongation on actual forging

Testing according to the applicable MDSs. Additional testing may be required depending on shape and functionality of the forging as agreed with purchaser and Qualifying Company.

Welded pipe and tube

Cut from over-length of pipe or from test plate welded as prolongation of the pipe/tube weld.

Weld and base material shall be tested at one end and in the mid-length position on one pipe.

Wrought fittings - seamless and welded

Cut from sacrificial fitting, over-length of fitting or for welded fittings test plates welded as a prolongation of the fitting weld.

One fitting of each type shall be tested at one end as a minimum. In addition different locations with different deformation ratio should be tested, e.g. inner- and outer radii and neutral zone for elbows. Tees should be tested both on one end and in the crotch area. For welded fittings testing shall comprise base material and weld(s).

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10.3.3 Additional testing Additional testing shall be carried out as required in Table 2. For all materials having section thickness/diameter exceeding 50 mm and requiring impact- or corrosion testing according to MDS/applicable specifications, additional testing shall be carried out as follows using specimens located in the mid thickness position (T/2) and at a distance from any second surface of T or at least 100 mm: a) impact testing in axial and tangential direction. The minimum absorbed energy shall be minimum

27 J/20 J (average/single values) tested at -46 C; b) corrosion and micro-examination in accordance with the requirements specified by the applicable MDS.

NOTE It is recognized that for certain applications corrosion properties and microstructure in mid-thickness are not important for the

functionality of the component as agreed with purchaser and Qualifying Company. In such cases it may be agreed that the tests shall be carried out for information only and a note about this shall be included on the QTR front page.

10.4 Welding procedure qualifications The qualification exercise shall include the supporting WPQR for the WPS for the following: a) welded products in accordance with the applicable MDS; b) repair welding of welds in accordance with the applicable MDS; c) minor and major repair welding as defined in ASTM A 703 for castings.

11 Qualification test record (QTR)

11.1 General The manufacturer shall establish a qualification test record (QTR) with content as listed in 11.2. The QTR shall be issued with document and revision numbers. The QTR shall be prepared with a front page with format and content as shown in Annex D. It is essential that all documentation be accurate, specific and in accordance with this NORSOK standard. The documentation will otherwise be rejected and thereby also the qualification.

11.2 Content of qualification test record (QTR) The content of QTR shall contain the following: a) QTR front page. See format and content as shown in Annex D.

b) Sect. 1 Table of content

c) Sect. 2 Manufacturing Summary, see Clause 8, including

1) process flow chart, 2) sketches showing typical samples with dimensions of production test samples and location

and orientation of test specimens.

d) Sect. 3 Heat treatment procedure, see Clause 9, including 1) report on the verification of heat treatment procedure, see 9.3, 2) report on the temperature uniformity test, see 9.1.3 and Annex B.

e) Sect. 4 Results of qualification testing including

1) description of component(s) tested for qualification. Sketch(es) shall be prepared showing dimensions of test sample and location and orientation of test specimens,

2) heat treatment chart(s) from the heat treatments of the components used for the qualification testing,

3) test reports with results from qualification testing, 4) start material certificate (when applicable).

f) Sect. 5 WPSs and WPQRs Pr

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1) welded products: a list of WPSs/WPQRs shall be included, 2) castings: the actual WPS/WPQRs for repair welding of minor and major repairs shall

be included. g) Sect. 6 Specific reference list, see 7.1.2 h) Sect. 7 Documentation of quality assurance system including

1) ISO certificate(s) according to ISO 9001, 2) Certificate of compliance to PED 97/23/EC, Annex I, paragraph 4.3, as available.

i) Sect. 8 MOM(s) from visit(s) to manufacturer by purchaser as required in 5.2.

11.3 Required copies and distribution of qualification test record (QTR) After acceptance one electronic copy, e.g. a CD, and one paper copy shall be issued to the Purchaser having initiated or ordered the qualification at the manufacturer and to the Qualifying Company, if different from the Purchaser, which monitored the qualification exercise and accepted the QTR by signing the QTR front page. Additional distribution is at the manufacturers discretion.

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Annex A (Informative)

Manufacturing Summary front page and example

Example of information, which shall be included on the front page: Plant(s) and location(s): Actual plants, locations and equipment facilities where

this procedure is relevant. Product(s): e.g. CLOSED DIE FORGINGS Specification(s): e.g. NORSOK M-630, MDS D44 Rev. 4 Limitations in the procedure:

Weigth: Length: Thickness: Other:

Qualification documentation: Ref. to the relevant document(s)/reports/test result(s)

which confirm that manufacturing of materials in accordance with this procedure will ensure satisfactory results per the actual specification.

Other relevant information: Revision: Date: Made by: Checked by: Approved by:

Manufacturing Summary No.:

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EXAMPLE OF MANUFACTURING SUMMARY (4 pages) Doc. No: MS-03 Page 1 of 4

MANUFACTURING SUMMARY TEE MADE BY FORGING

Seamless pipe Size 1 to 24 / Thickness 10 mm to 31,25 mm ASTM A 815 UNS S31803 MDS D43 REV. 24

(Prototype Tee 6 sch. 160)

N PHASE DESCRIPTION PROCEDURE

1 Identification of base material

Pipe to ASTM A 790 S31803 MDS D41 Rev. 24 N = 0,14 % to 0,20 % Manufacturer:

POQ-05

2 PMI 100 % raw material. PMI-01 Rev.0 3 Cutting Cutting to required length by saws. POQ-09 4 Identification

marking Hard stamping of last two number of heat number. POQ-05

5 Heating Heating at xxxx C to xxxx 0 C, holding time minimum 1 min for each mm thickness. Temperature controlled by optical pyrometer. Equipment = furnace bloss N 3 furnace gibbon N 2

POQ-09 I.O. 13 Rev.2

6 Ovalization Ovalization of pipe by pressing Equipment = 60 t; 100 t; 150 t; 200 t; 250 t; 300 t; 400 t; 900 t; 1200 t.

POQ-09 I.O. 13 Rev. 2

7 Re-heating Reheating at xxxx C to xxxx C, holding time minimum 1 min for each mm thickness. Temperature controlled by optical pyrometer.


8 Forming Forging by presses Start forming temperature xxxxC to xxxxC Equipment = 60 t; 100 t; 150 t; 200 t; 250 t; 300 t; 400 t; 900 t; 1200 t. After forming the temperature shall not be less than 950 C.


9 Cooling Quenching in cold water. 10 Cutting hole Cutting of bulge. 11 Re-heating Re-heating at xxxx C to xxxx C, holding time minimum 1 min

for each mm thickness. Temperature controlled by optical pyrometer.


12 Extrusion Extrusion of branch by press After extrusion the temperature shall not be less than xxx C. Re-heating at xxxx C if more than one step is necessary.


13 Cooling Quenching in cold water.

14 Cutting Cutting to final dimensions by plasma, except section connecting test samples to body of tee.

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Doc. No.: MS-03 Page 2 of 4

MANUFACTURING SUMMARY TEE MADE BY FORGING

Seamless pipe Size 1 to 24 / Thickness 10 mm to 31,25 mm ASTM A 815 UNS S31803 MDS D43 REV. 4

(Prototype Tee 6 sch. 160)

N PHASE DESCRIPTION PROCEDURE 15 Heat treatment Heat treatment: Solution annealing in gas heating furnace

Equipment: Sottri truck-hearth with dimension of Furnace loading temperature: room temperature Heating rate: xxxC/h (above xxxC) Holding temperature: xxxxC Holding time: 1h/1 wall thickness or minimum 15 min Quenching: In cold water max xx C within 60 s.

HT-01 Rev.3

16 Shot blasting Stainless steel grit. 17 Sampling Removal of material for test samples. MDS D43 Rev.

24 Test sample plan N SP-01 Rev.1

18 Mechanical test According to NORSOK MDS D43 Rev.4 MDS D43 Rev. 4 Test sample plan N SP-01 Rev.1

19 Pickling Immersion in acid solution at temperature of xx C Equipment: N 2 pickling vat 900 mm x 1600 mm x 1000 mm

PK-01 Rev.0

20 Machining Working of the ends as per purchase order. 21 Dye penetrant test

According to ASTM A 815 Supplementary requirement S7 Accept criteria: ASME VIII Div.1 100 % of the fittings.

ASME VIII Div.1 App.8

22 PMI 100 % of the fittings. PMI-01 Rev.0 23 Marking Marking by low stress stamping according P.O. MDS D43 Rev.4

24 Visual and dimensional

By calibrated equipment. POQ-05 Drw. No. 972

25 Pickling Re-immersion in acid solution for final cleaning and passivation.

PK-01 Rev.0

26 Final dossier Inspection certificate plus NDE certificates. EN 10204, 3.1B

27 Packing According order requirements. ASTM E 700

Revision No. Date Made by Approved by Note Flow chart is shown at page 4 coloured route.

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EXAMPLE OF MANUFACTURING FLOW CHART

Manufacture flow chart for elbow and tee manufacture

ELBOW REDUCING & CAP BY FORGING

HEATING

OVALIZATION (ELBOWS ONLY)

FORMING

CUTTING OF ENDS

QUENCH

RE-HEATING (ELBOWS ONLY)

ELBOW BY MANDREL

HEATING

EXPANDING

CALIBRATION

QUENCH

CUTTING OF ENDS

TEE BY EXTRUSION

HEATING

OVALIZATION

RE-HEATING

QUENCHING

CUTTING HOLE

HEATING

EXTRUSION

QUENCHING

CUTTING OF ENDS

SEAMLESS PIPE

CUTTING

MARKING

HEAT TREATMENT

SAMPLING

MECHANICAL TEST

PICKLING

MACHINING

NDE EXAMINATION

MARKING

FINAL CLEANING

FINAL DOSSIER

PACKING

FORMING

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Annex B (Normative)

Additional requirements to API Spec 6A:2010/ISO 10423:2009 , Annex M, and ASTM A 991

B.1 General Temperature uniformity survey of quality heat treatment furnaces shall be performed according to API Spec 6A:2010/ISO 10423:2009, Annex M, or ASTM A 991 with the following additional requirements: a) the alternatives of attaching thermocouples to the extremities of each load, see ASTM A 991, Para 1.4, or

the alternative surveying techniques described in ASTM A 991, Para 7.7, are not acceptable as an alternative to the specified temperature uniformity survey;

b) the temperature uniformity survey shall be carried out at the maximum set point temperature for the actual materials to be processed in the furnace. The maximum limit of 1 100 C stated in ASTM A 991, Para 6.1.1.2, shall not apply;

c) the calibration shall be carried out with maximum load in the furnace. This is to demonstrate that the required temperature uniformity and the maximum temperature specified can be reached. Subsequent calibrations, which shall be carried out annually, may be carried out with empty furnace;

d) the documentation of the temperature uniformity survey shall include sketch of the furnace with working zone of furnace and number and location of thermocouples used for the survey, see API Spec 6A:2010/ISO 10423:2009, Annex M, subclause M 3.3, or ASTM A 991, Paras 8.2.7 and 8.2.8;

e) uniformity survey shall to be performed annually for actual furnaces included in Manufacturing Summary for solution heat treatment;

f) the manufacturer shall establish a procedure for how to carry out the temperature uniformity survey.

B.2 Batch type furnaces The following additional requirements to ASTM A991 apply: a) for furnaces with set point temperature in the working zone above 800 C the temperature at any point

shall not vary by more than 14 C from the furnace set point temperature after the furnace working zone has been brought up to temperature;

b) for furnaces with set point temperature in the working zone below 800 C shall not vary by more than 8 C from the furnace set point temperature after the furnace working zone has been brought up to temperature;

c) once the furnace temperature has reached the set point temperature, the temperature of all test locations shall be recorded at maximum 2 min intervals for at least 10 min. Then readings shall be taken at maximum 5 min intervals for sufficient time to determine the recurrent temperature pattern of the furnace working zone for at least 30 min.

B.3 Continuous conveyance and semi continuous conveyance furnaces The temperature uniformity check may be carried out as verification of the heat treatment procedure, see 9.3. In any case the following requirements apply: a) the survey shall verify that

1) the specified heat treatment temperature for a material can be kept uniform within specified tolerances through the working zone of the furnace as defined in the heat treatment procedure,

2) the defined component travel speeds in the heat treatment procedure results in the minimum specified soaking time being achieved, measured from when the set temperature is reached.

b) the temperature survey shall be carried out on actual products. A minimum of two surveys shall be carried out with products representing respectively the smallest (thinnest) and largest (thickness) sizes to be heat treated.

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Annex C (Informative

Verification of heat treatment procedure Example

Comparison of time temperature curves of the contact thermocouples (3 off) fixed to the load itself with the furnace thermocouple. Note the time difference to reach set temperature between the furnace thermocouple and the contact thermocouples fixed onto the load. Pr

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Annex D (Normative)

Form for Qualification Test Record (QTR) Front Page

This form is available as a word file at the NORSOK home page http://www.standard.no/. At the attached form examples of how to fill in the form is given. Manufacturer logo Qualification Test Record (QTR)

NORSOK M-650 QTR. No.:

Rev. No.:

Manufacturer name/address/ Web page:

Reference standard NORSOK M-650, Edition 4

Material designation and MDS No.:

Example: ASTM A182 Gr. F55; MDS D54, Revision 4.

Manufacturing Summary doc. No.:

Rev. No.:

Products and manufacturing process(es):

Example: Die forged flanges, Production route No. xx Forged discs, Production route No. xx Rolled rings, Production route No. xx

Mandatory conditions and sub-contractors:

Example: x Heat treatment by: XXXXXXXX x Forgings shall be machined as close as possible to final shape prior to quality

heat treatment.

Other information: Example: x Pickling by XXXXXXX.

Qualification expires:

Tested and qualified thickness and weight Products and

manufacturing process(es):

Test record No.

Tested thickness

mm

Qualified thickness

mm

Test piece weight

kg

Qualified weight

kg Die forged flanges Abs 56 170 170 250 All

Forged discs Abs 57 55 60 70 140 Rolled rings Abs 58 130 130 300 All

Qualification/acceptance signatures Manufacturer: Prepared by/Date: Checked by/Date:

The manufacturer and this QTR are evaluated and found to be in compliance with the requirements of NORSOK M-650 for supply of the above listed products and materials.

This acceptance does not exempt any purchaser from his responsibility to ensure that this qualification is valid for his products within the essential variables of NORSOK M-650.

Qualified/Accepted by (company name /address): Signature/Date:

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/CreateJDFFile false /Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > > /FormElements true /GenerateStructure false /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles true /MarksOffset 6 /MarksWeight 0.250000 /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /UseName /PageMarksFile /RomanDefault /PreserveEditing true /UntaggedCMYKHandling /UseDocumentProfile /UntaggedRGBHandling /UseDocumentProfile /UseDocumentBleed false >> ] /SyntheticBoldness 1.000000>> setdistillerparams> setpagedevice

NORSOK M-650 (Ed. 2011)_Qualification of Manufacturers of Special Materials

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Transcript of NORSOK M-650 (Ed. 2011)_Qualification of Manufacturers of Special Materials