Draft HAZOP Study

Sample-CokeovenLicensed To : HAMSAGARS

HAMS-GPS : HAZOP Study for :

ACTION REPORT

Project/Plant stage at HAZOP : Detailed engineering stage

Date: 14/01/2012:53:45 PM

Part-1a Action by Report- Design intension wise

Design intention (Operation): A.0

Description of design intention:

Whether Cokeoven Technology procured with HAZOP Study Report?

Node: A.0

Sop reference: N.A.Hazop study Number: A.0

P and I Dwg. No. N.A.Parameter : A.0

HAZOP GUIDE WORD

RECOMMENDATION FOR BETTER HAZARD CONTROL Action by: Name , Designation, Department

Action Date

For future Technology Procurement agreements, may make it mandatory for all Projects to include HAZOP study as part of Technology package.

(1) NO (NOT OR NONE)

Future Project Authorities

Action taken:


SIL/LOP: 1

Design intention (Operation): A. Separate Gas and Liquid at required Temperature


Separate Gas and Liquid at required Temperature

Node: A.1 Gas from Battery to byproduct


P and I Dwg. No. PD-1055Parameter : A.1 Temperature

HAZOP GUIDE WORD


Action Date

1. Consider HT Alarm for gas2. Provide LP Alarm for ammonia liquor in CCR 3. Bleeding of gas requires ignition and auto ignition to be provided

(2) MORE OF Project authority

Action taken:

1. Consider HT Alarm for gas2. Provide LP Alarm for ammonia liquor in CCR 3. Bleeding of gas requires ignition and auto ignition to be providedSIL/LOP: 1

Provide on all cases of piping & all Flanges as per OISD-110. Normally bonding is done using round wires. Ihis is not correct. It is necessary to follow for Strip specs IS-3043 & IS-7689 and OISD-108.

(17) STATIC CHARGE

Project authority

Action taken:

Provide on all cases of piping & all Flanges as per OISD-110. Normally bonding is done using round wires. Ihis is not correct. It is necessary to follow for Strip specs IS-3043 & IS-7689 and OISD-108.SIL/LOP: 1

Design intention (Operation): A.1 Separate Gas and Liquid at required Pressure


Separate Gas and Liquid at required Pressure

Node: A.1 Gas fro Battery to Byproduct

Sop reference: N.A.Hazop study Number: A.1.1

P and I Dwg. No. PD-1055Parameter : A.1 Pressure

HAZOP GUIDE WORD


Action Date

As under High Temperature(2) MORE OF Project authority

Action taken:

As under High Temperature

SIL/LOP: N.A.

Friday, January 14, 2012 of 11Friday, January 14, 201

Licensed To : HAMSAGARS 30


Design intention (Operation): A.2 To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C.


To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C.

Node: A.2 Primary Gas cooler


P and I Dwg. No. PD-1055Parameter : A.2 Temperature

HAZOP GUIDE WORD


Action Date

Provide Nitrogen injection facility for purging at PGC(1) NO (NOT OR NONE)

Project authority

Action taken:

Provide Nitrogen injection facility for purging at PGC

SIL/LOP: N.A.

Ptovide Steam line to lines CLLG-10abc & 18abc(2) MORE OF Project authority

Action taken:

Ptovide Steam line to lines CLLG-10abc & 18abc

SIL/LOP: N.A.

Provide drain point for water line in PGC(16) MAINTENANCE

Project authority

Action taken:

Provide drain point for water line in PGC

SIL/LOP: N.A.

Provide Air vent at CWRLG01abc(19) SAFETY Project authority

Action taken:

Provide Air vent at CWRLG01abc

SIL/LOP: 2

Design intention (Operation): A.3 To eliminate tar residue from gas


None

Node: A.3 ETP


P and I Dwg. No. PD-1055Parameter : A.3 Voltage

HAZOP GUIDE WORD


Action Date

Provide positive isolation of Gas Equipment to ensure LOTO.(16) MAINTENANCE

Project authority

Action taken:

Provide positive isolation of Gas Equipment to ensure LOTO.

SIL/LOP: 1

Design intention (Operation): A.3.1 To ensure Oxygen content in the gas ;ess than 0.8% vy vol.


To ensure Oxygen content in the gas ;ess than 0.8% vy vol.

Node: A.3.1 ETP

Sop reference: N.A.Hazop study Number: A.3.1

P and I Dwg. No. ES.LG1.GY.22-0103Parameter : A.3.1 Oxygen

HAZOP GUIDE WORD


Action Date




1. Consider airtight explosion flap or a rupture disk as appropriate that automatically relieves explosion pressure.


Action taken:

1. Consider airtight explosion flap or a rupture disk as appropriate that automatically relieves explosion pressure.

SIL/LOP: 1

Design intention (Operation): B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning


None

Node: B.1.1 Exhauster

Sop reference: N.A.Hazop study Number: B.1.1

P and I Dwg. No. ES.LG1.GY.22-0104Parameter : B.1.1 Output Pressure

HAZOP GUIDE WORD


Action Date

Provide independent drain valves CLLG25ab, 29ab.(1) NO (NOT OR NONE)

Project authority

Action taken:

Provide independent drain valves CLLG25ab, 29ab.

SIL/LOP: 2

Down straem SOP adherence will keep down stream pressure under control

(2) MORE OF Production

Action taken:

Down straem SOP adherence will keep down stream pressure under control

SIL/LOP: 1

Provide CO detector in the Exhauster house(19) SAFETY Project authority

Action taken:

Provide CO detector in the Exhauster house

SIL/LOP: 1

Design intention (Operation): C.1 To cool the Gas before sending to Desulphurizer columns from 45 deg. C to 25 Deg. C


To cool the Gas before sending to Desulphurizer columns from 45 deg. C to 25 Deg. C

Node: C.1 Precooling Tower of Desulphurizer

Sop reference: N.A.Hazop study Number: C.1

P and I Dwg. No. ES.TL1.GY.22-0104Parameter : C.1 Pressure drop across column

HAZOP GUIDE WORD


Action Date

1. Provide positive isolation system to enable short duration maintenance under LOTO.

(16) MAINTENANCE

Project authority

Action taken:

1. Provide positive isolation system to enable short duration maintenance under LOTO.

SIL/LOP: 1

Design intention (Operation): D.1 To remove H2S from Cokeoven gas


To remove H2S from Cokeoven gas

Node: D.1 Desulphurization tower

Sop reference: N.A.Hazop study Number: D.1

P and I Dwg. No. ES.TL1.GY.22-0104Parameter : D.1 Pressure

HAZOP GUIDE WORD


Action Date




Provide Nitrogen inlet point at gas inlet line to both towers(1) NO (NOT OR NONE)

Project authority

Action taken:

Provide Nitrogen inlet point at gas inlet line to both towers

SIL/LOP: 1

Provide positive isolation system to enable short duration maintenance under LOTO.

(16) MAINTENANCE

Project authority

Action taken:

Provide positive isolation system to enable short duration maintenance under LOTO.

SIL/LOP: N.A.

Provide isolation valves for both towers at outlet lines of water seal outlet VTL-01AB for both towers

(19) SAFETY Project authority

Action taken:

Provide isolation valves for both towers at outlet lines of water seal outlet VTL-01AB for both towers

SIL/LOP: N.A.

Design intention (Operation): D.1 To remove H2S from Cokeoven gas


To remove H2S from Cokeoven gas

Node: D.1 Desulphurization tower

Sop reference: N.A.Hazop study Number: D.1.1

P and I Dwg. No. ES.TL1.GY.22-0104Parameter : D.1 Temperature of Solution

HAZOP GUIDE WORD


Action Date

Provide Steam flushing at scrub liquor side and water flushing facilities at water side of heat exchanger tubes


Action taken:

Provide Steam flushing at scrub liquor side and water flushing facilities at water side of heat exchanger tubes

SIL/LOP: 1

Design intention (Operation): E.1 To regenerate Sulphur from H2S solution


To regenerate Sulphur from H2S solution

Node: E.1 Sulphur production

Sop reference: N.A.Hazop study Number: E.1

P and I Dwg. No. ES.TL1.GY.22-0104 (2)Parameter : E.1 Air flow

HAZOP GUIDE WORD


Action Date

Provide Air flow controller for Tower A also(1) NO (NOT OR NONE)

Project authority

Action taken:

Provide Air flow controller for Tower A also

SIL/LOP: N.A.

As under No-Air flow(3) LESS OF Project authority

Action taken:

As under No-Air flow

SIL/LOP: N.A.

Provide a Exhaust Hood above the Sulphur Foam Tank and release the vapours at suitable height or send to scrubber as appropriate

(19) SAFETY Project authority

Action taken:

Provide a Exhaust Hood above the Sulphur Foam Tank and release the vapours at suitable height or send to scrubber as appropriate

SIL/LOP: 0



HAMS-GPS : HAZOP Study for : Sample-CokeovenHAMS-GPS : HAZOP Study for : Project/Plant stage at HAZOP : Detailed engineering stage

Part-2a HAZOP Report-Recommendations only

Design intention (Operation):

A.0

Hazop study Number: A.0

Licensed To : HAMSAGARS

P and I Dwg. No. : N.A.

Sop reference: N.A.

Existing controls:Units:

Control Range:


Whether Cokeoven Technology procured with HAZOP Study Report?

A.0

Parameter. : A.0Node:

HAZOP GUIDE WORD

LIKELY DEVIATION LIKELY CAUSES LIKELY CONSEQUENCES

PRESENT CONTROLS THEIR

LIMITATIONS

RECOMMENDATI-ON FOR BETTER

HAZARD CONTROL

HAZOP GUIDE WORD

Cokeoven technolohy has not been procured with HAZOP study

Technology procurements did not include requirement of HAZOP study

Hazards and Operability issues required to be addressed at technology procurement stage not covered may result in retention of certain Hazaeds and operability issues

Pre-detailed Engineering HAZOP being done.




Action by: Future Project AuthoritiesRISK LEVEL: Risk level: MEDIUM DAMAGE and LOW CHANCE SIL/LOP 1Documentation

Friday, January 14, 2011 Page 1 of 56Friday, January 14, 2012


Part-2a HAZOP Report-Recommendations only

Any other observations

Nil

Nil

n


Nil

Nil

n


A. Separate Gas and Liquid at required Temperature

Hazop study Number: A.1

Licensed To : HAMSAGARS

P and I Dwg. No. : ES.LG1.GY.22-0103

Sop reference: N.A.

Existing controls: Temperature PressureUnits: Deg C mm WC

Control Range: 75-85 -120 to -300


Separate Gas and Liquid at required Temperature

A.1 Gas from Battery to byproduct

Parameter. : A.1 TemperatureNode:

HAZOP GUIDE WORD

LIKELY DEVIATION LIKELY CAUSES LIKELY CONSEQUENCES

PRESENT CONTROLS THEIR

LIMITATIONS

RECOMMENDATI-ON FOR BETTER

HAZARD CONTROL

HAZOP GUIDE WORD



Part-2b HAZOP Full Report


Nil

Nil

Nil


Nil

Nil

Nil

HAZOP team: Name, Designation, Department

1. Dr. Ram S. Hamsagar, Chair person,2. Mr. Sunil Hamsagar, Softer Simulation Expert,3. Mr. Amar Bountra, Process,4. Mr. Sukumar, Process,5. Mr. Yogendra Babu, Engg,6. Mr. Rakesh Kumar, Engg (Electrical),7. Mr. Sethu Madhavan, Engg (Aut

8. Mr. L. N. Kumar, Engg (Safety), 9. Mr. Pramod, Engg-Env, 10. Mr. KB Panchal, Safety11. Ms. Shikha Sirohi, HSE, 12. Mr. Ankur, Proj Planning - EPIL, 13. Mr. Eldose, Proj quality, EPIL14. Mr. Bhaskar, Proj Maint, EPIL15. Mr. V. Subramanium, EPIL

SIL Generalized View

4 Potential for fatalities in the community

3 Potential for multiple fatalities

2 Potential for major serious injuries or one fatality

1 Potential for minor injuries



HAMS-GPS : HAZOP Study for : Sample -CokeovenLicensed To : HAMSAGARS


Part-3 RBI-matrix.

Summary of RISK BASED INVESTIGATION (RBI) MATRIX

0

0

0

0

0

5

30

5

0

0

2

0

0

0

0

0

0

0

0

0

556 0 0 0 0

40 2 0 0

5

32

5

0

556

556 598

93.0 6.7 0.3 0.0 0.0

93.0

0.8

5.4

0.8

0.0

TOTAL

%

TOTAL %

HIGH

MEDIUM HIGH

MEDIUM

LOW

0

0

7

35

0.00

0.00

1.17

5.85

598

100.0

100.00

Chance levels ----------->

<----------------Dam

age level

Applications of RBI-Risk Matrix: Following are the applications of an RBI-Risk matrix

2. To establish risk mitigation measures and evaluate their effects, 3. To compare units and processes on the basis of risk,

4. To develop trends of risk development of a unit over time and during its life cycle.

1. As an indicator of the risk level of the installation,

TOTAL %RISK LEVELS

SAFE 556 92.98


HAMS-GPS : HAZOP Study for : Sample -CokeovenLicensed To : HAMSAGARS


Summary of RBI-Matrix (conforming to European Process Safety Center's Standard) for selected HAZOP Studies: Date: 11/6/2010 1:00:42 PM


Number of Risk (Damage-Consequence) level areasMEDIUMMEDIUM

HIGHHIGH LOWNum.

Guide Words

SAFE

Part-4a Overall Risk levels-Design intension wise

10A. Separate Gas and Liquid at required Temperature

0 2110A. Separate Gas and Liquid at required Temperature

0 212 11

00A.0

0 2200A.0

0 221 11

00A.1 Separate Gas and Liquid at required Pressure

0 2300A.1 Separate Gas and Liquid at required Pressure

0 230 00

10A.2 To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C. 0 2210A.2 To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C. 0 221 00

10A.3 To eliminate tar residue from gas

0 2210A.3 To eliminate tar residue from gas

0 221 00

10A.3.1 To ensure Oxygen content in the gas ;ess than 0.8% vy vol.

0 2210A.3.1 To ensure Oxygen content in the gas ;ess than 0.8% vy vol.

0 221 00

00B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 0 2300B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 0 230 00

10B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 0 2010B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 0 203 22

10C.1 To cool the Gas before sending to Desulphurizer columns from 45 deg. C to 25 Deg. C 0 2210C.1 To cool the Gas before sending to Desulphurizer columns from 45 deg. C to 25 Deg. C 0 221 00

00D.1 To remove H2S from Cokeoven gas

0 2200D.1 To remove H2S from Cokeoven gas

0 221 11

00D.1 To remove H2S from Cokeoven gas

0 2200D.1 To remove H2S from Cokeoven gas

0 221 11

00E.1 To regenerate Sulphur from H2S solution

0 2200E.1 To regenerate Sulphur from H2S solution

0 221 11

10F.1 To recover Ammonia from Coke oven gas

0 2110F.1 To recover Ammonia from Coke oven gas

0 212 11

00F.1.1 To recover Ammonia from Coke oven gas

0 2200F.1.1 To recover Ammonia from Coke oven gas

0 221 11

00G.1 To distill ammonia from Excess Ammonia Liquor

0 2200G.1 To distill ammonia from Excess Ammonia Liquor

0 221 11

00G.1.1 To Distill ammonia from excess ammonia liquer

0 2200G.1.1 To Distill ammonia from excess ammonia liquer

0 221 11

00H.1 To cool the Gas to ambient Temp

0 2100H.1 To cool the Gas to ambient Temp

0 212 22

00H.1.1 To cool the gas to Ambient Temperature

0 2200H.1.1 To cool the gas to Ambient Temperature

0 221 11





HIGHHIGH LOWNum.

Guide Words

SAFE

Part-4a Overall Risk levels-Design intension wise

00I.1 To compress air for different plants

0 2200I.1 To compress air for different plants

0 221 11

00J.1 To Separate Tar and ammonia water from gas condensate & Recycle Ammonia Liq. To Battery 0 1900J.1 To Separate Tar and ammonia water from gas condensate & Recycle Ammonia Liq. To Battery 0 194 44

00K.1 To generate Low Pressure Steam from gas Fired Boilers

0 1700K.1 To generate Low Pressure Steam from gas Fired Boilers

0 176 66

00K.1.1 To generate low pressure steam from gas fired boilers

0 2200K.1.1 To generate low pressure steam from gas fired boilers

0 221 11

00L.1 To store and Load Tar for Dispatch and Unload Caustic lye and H2SO4 from tankers 0 2000L.1 To store and Load Tar for Dispatch and Unload Caustic lye and H2SO4 from tankers 0 203 33

00M.1 To produce coke and by product gas from coal

0 1900M.1 To produce coke and by product gas from coal

0 194 44

00N.1 To provide water Pressure in the Firefighting network Min-8 Max-10 Bar 0 2100N.1 To provide water Pressure in the Firefighting network Min-8 Max-10 Bar 0 212 22

00O.1 To ensure early detection of any fire in the offices

0 2300O.1 To ensure early detection of any fire in the offices

0 230 00

700 35

1.17.00.00 5.85

TOTALPERCENT


2. To establish risk mitigation measures and evaluate their effects,

3. To compare units and processes on the basis of risk,



556

92.98

Note:Col.-2 gives No. of guie words (Deviations) used out of a total of 23-possible deviations. Col.-3 to 6 give Risk Levels of applied deviations and Col.-7 gives No. safe i.e. no Risk of deviations. Total of Safe levels divided by total of Risks and Safe levels multiplied by total Safe levels gives % Safety pf the facility.



Part-4b Overall Risk levels-Node wise

HAMS-GPS : HAZOP Study for : Sample-Coke Oven Licensed To : HAMSAGARS

Node:


HIGHHIGH SAFE

Summary of RBI-Matrix (conforming to European Process Safety Center's Standard) for selected Nodes:

Num. Guide Words

LOW

10A.1 Gas from Battery to byproduct 0 110A.1 Gas from Battery to byproduct 0 12 2121

00A.0 0 100A.0 0 11 2222

00A.1 Gas fro Battery to Byproduct 0 000A.1 Gas fro Battery to Byproduct 0 00 2323

10A.2 Primary Gas cooler 0 010A.2 Primary Gas cooler 0 01 2222

10A.3 ETP 0 010A.3 ETP 0 01 2222

10A.3.1 ETP 0 010A.3.1 ETP 0 01 2222

00B.1 Exhauster 0 000B.1 Exhauster 0 00 2323

10B.1.1 Exhauster 0 210B.1.1 Exhauster 0 23 2020

10C.1 Precooling Tower of Desulphurizer 0 010C.1 Precooling Tower of Desulphurizer 0 01 2222

00D.1 Desulphurization tower 0 100D.1 Desulphurization tower 0 11 2222

00D.1 Desulphurization tower 0 100D.1 Desulphurization tower 0 11 2222

00E.1 Sulphur production 0 100E.1 Sulphur production 0 11 2222

10F.1 Ammonium Sulphate Plant 0 110F.1 Ammonium Sulphate Plant 0 12 2121

00F.1.1 Ammonium Sulphate Plant 0 100F.1.1 Ammonium Sulphate Plant 0 11 2222

00G.1 Ammonia Distillation Column 0 100G.1 Ammonia Distillation Column 0 11 2222

00G.1.1 Ammonia distillation column 0 100G.1.1 Ammonia distillation column 0 11 2222

00H.1 Final Gas cooler 0 200H.1 Final Gas cooler 0 22 2121

00H.1.1 Final Gas cooler 0 100H.1.1 Final Gas cooler 0 11 2222

00I.1 Air compressor station 0 100I.1 Air compressor station 0 11 2222

00J.1 Gas condensation Plant 0 400J.1 Gas condensation Plant 0 44 1919

00K.1 Boiler 0 600K.1 Boiler 0 66 1717

00K.1.1 Boiler 0 100K.1.1 Boiler 0 11 2222

00L.1 Chemical Storage Area 0 300L.1 Chemical Storage Area 0 33 2020



HAMS-GPS : HAZOP Study for : Sample-Coke OvenLicensed To : HAMSAGARS

Node:


HIGHHIGH SAFE

Summary of RBI-Matrix (conforming to European Process Safety Center's Standard) for selected Nodes:

Num. Guide Words

LOW

00M.1 Coke Oven Battery 0 400M.1 Coke Oven Battery 0 44 1919

00N.1 Fire fighting water Network 0 200N.1 Fire fighting water Network 0 22 2121

00O.1 Offices 0 000O.1 Offices 0 00 2323

700 35

1.17.00.00 5.85

TOTALPERCENT


2. To establish risk mitigation measures and evaluate their effects,

3. To compare units and processes on the basis of risk,



556

92.98

556 x 100 / 598 = 92.98SAFE :

35 x 100 / 598 = 5.85LOW :

7 x 100 / 598 = 1.17MEDIUM :

0 x 100 / 598 = .MEDIUM HIGH :

0 x 100 / 598 = . HIGH :



Count RemarksRisk Levels for HAZOP



Part-4a SIL-LOP requirements-Overall

Over all Risk Levels

SIL/LOP Required

1/14/2012 5:58:59 PM

Risk level: MEDIUM DAMAGE and MEDIUM CHANCE 2 Medium Critical 2

Risk level: MEDIUM DAMAGE and LOW CHANCE 29 Medium Low Critical 1

Risk level: MEDIUM HIGH DAMAGE and LOW CHANCE 5 Medium Low Critical 1

Risk level: LOW DAMAGE and LOW CHANCE 4 Low Critical 0

Risk level: NO DAMAGE and NO CHANCE 29 Safe N.A.






Note: Design team to check and ensure the SIL requirements for safety instruementation system and LOP for equipments safety as applicable are avaible. If not the SIL/LOP requirements to be provided.

Friday, January 14, 2011 Page 1 of 1Friday, January 14, 2012 149




Part-5b SIL-LOP requirements-Category wise

Summary of Category wise

SIL/LOP Required

1/14/2012 6:00:38 PM

Category

Engineering 1 Medium Critical 2

Hazard. 1 Medium Critical 2

Documentation 1 Medium Low Crit 1

Hazard. 33 Medium Low Crit 1

Hazard. 2 Low Critical 0

Quality. 2 Low Critical 0

Engineering 1 Safe N.A.

Hazard. 10 Safe N.A.

Maintenance 8 Safe N.A.

Operability. 10 Safe N.A.











Part-5c SIL-LOP requirements-Design Intention wise

Risk Levels (Design intention wise)

SIL/LOP Required

1/14/2012 6:01:43 PM

Design Intention

A.1 Separate Gas and Liquid at required Pressure 1 Safe N.A.

A.2 To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C. 3 Safe N.A.

D.1 To remove H2S from Cokeoven gas 2 Safe N.A.

E.1 To regenerate Sulphur from H2S solution 2 Safe N.A.

F.1 To recover Ammonia from Coke oven gas 3 Safe N.A.

F.1.1 To recover Ammonia from Coke oven gas 1 Safe N.A.

G.1 To distill ammonia from Excess Ammonia Liquor 1 Safe N.A.

G.1.1 To Distill ammonia from excess ammonia liquer 2 Safe N.A.

H.1 To cool the Gas to ambient Temp 1 Safe N.A.

I.1 To compress air for different plants 3 Safe N.A.

K.1 To generate Low Pressure Steam from gas Fired Boilers 1 Safe N.A.

K.1.1 To generate low pressure steam from gas fired boilers 1 Safe N.A.

M.1 To produce coke and by product gas from coal 2 Safe N.A.

N.1 To provide water Pressure in the Firefighting network Min-8 Max-10 Bar 5 Safe N.A.

O.1 To ensure early detection of any fire in the offices 1 Safe N.A.

A.2 To cool the gas by 2-stage Process water chilled water from 80 to 22 Deg C. 1 Medium Critical 2

B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 1 Medium Critical 2

A. Separate Gas and Liquid at required Temperature 2 Medium Low Crit 1

A.0 1 Medium Low Crit 1

A.3 To eliminate tar residue from gas 1 Medium Low Crit 1

A.3.1 To ensure Oxygen content in the gas ;ess than 0.8% vy vol. 1 Medium Low Crit 1

B.1 To suck the gas from cokeoven battery and supply to byproduct unit for cleaning 2 Medium Low Crit 1

C.1 To cool the Gas before sending to Desulphurizer columns from 45 deg. C to 25 Deg. C

1 Medium Low Crit 1

D.1 To remove H2S from Cokeoven gas 2 Medium Low Crit 1

F.1 To recover Ammonia from Coke oven gas 2 Medium Low Crit 1





Part-5c SIL-LOP requirements-Design Intention wise

Risk Levels (Design intention wise)

SIL/LOP Required

1/14/2012 6:01:43 PM

Design Intention

F.1.1 To recover Ammonia from Coke oven gas 1 Medium Low Crit 1

G.1 To distill ammonia from Excess Ammonia Liquor 1 Medium Low Crit 1

G.1.1 To Distill ammonia from excess ammonia liquer 1 Medium Low Crit 1

H.1 To cool the Gas to ambient Temp 1 Medium Low Crit 1

H.1.1 To cool the gas to Ambient Temperature 1 Medium Low Crit 1

I.1 To compress air for different plants 1 Medium Low Crit 1

J.1 To Separate Tar and ammonia water from gas condensate & Recycle Ammonia Liq. To Battery

4 Medium Low Crit 1

K.1 To generate Low Pressure Steam from gas Fired Boilers 4 Medium Low Crit 1

K.1.1 To generate low pressure steam from gas fired boilers 1 Medium Low Crit 1

L.1 To store and Load Tar for Dispatch and Unload Caustic lye and H2SO4 from tankers

2 Medium Low Crit 1

M.1 To produce coke and by product gas from coal 4 Medium Low Crit 1

N.1 To provide water Pressure in the Firefighting network Min-8 Max-10 Bar 1 Medium Low Crit 1

E.1 To regenerate Sulphur from H2S solution 1 Low Critical 0

K.1 To generate Low Pressure Steam from gas Fired Boilers 2 Low Critical 0

N.1 To provide water Pressure in the Firefighting network Min-8 Max-10 Bar 1 Low Critical 0








Draft HAZOP Study

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