OPF-WODL-PRS-MPR-GNL-1165_F837.1

Hess (Indonesia-Pangkah) Ltd

Ujung Pangkah

Process Systems Operations Manual

SECTION 2.0 GAS SWEETENING, DEHYDRATION, METERING AND EXPORT

1.1 1.2 1.3

1 1 1

System Purpose/Function Primary Components Primary Interfaces

SYSTEM DESCRIPTION

2

2.1 2.2

2 5

EQUIPMENT DESCRIPTION 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10

4.0

5.0

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System Overview Primary Flow Description Amine Contactor Inlet KO Drum 135-V-01 Mercury Guard Beds 135-V-15 A/B Guard Bed Filters 135-W-06 A/B Amine Contactor 135-V-06 Amine Overhead Gas KO Drum 135-V-09 TEG Contactor 136-V-04 TEG Overhead KO Drum 136-V-23 Gas/Gas Exchanger 137-H-01 Low Temperature Separator 137-V-05 Sales Gas Metering Package 138-JY-01

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3.0

1

6 6 7 8 8 9 10 11 12 13 14

INSTRUMENTATION AND CONTROL

15

4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

15 16 16 17 18 18 19 20 22 23

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2.0

INTRODUCTION

Amine Contactor Inlet KO Drum 135-V-01 Mercury Guard Beds 135-V-15A/B Guard Bed Filters 135-W-06A/B Amine Contactor 135-V-06 Amine Overhead Gas KO Drum 135-V-09 TEG Contactor 136-V-04 TEG Overhead KO Drum 136-V-23 Gas/Gas Exchanger 137-H-01 Low Temperature Separator 137-V-05 Sales Gas Metering Package 138-JY-01 and Sales Gas Pipeline

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1.0

ENVIRONMENTAL, HEALTH AND SAFETY REQUIREMENTS

24

5.1 5.2 5.3

24 25 26

General EHS Requirements Specific Health and Safety Requirements Specific Environmental Requirements

Document No: UP-OPS-MAN-0002 Issue 1; December 2007

Section 2.0 – Gas Sweetening, Dehydration, Metering and Export Page i

OPF-WODL-PRS-MPR-GNL-1165 - 2009/03/02 19:35:17


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Process Systems Operations Manual 6.0

REFERENCE INFORMATION

26

6.1 6.2 6.3

26 26 27

Hess Corporation Company Documentation Vendor Documentation Engineering Drawings (PFDs, UFDs and P&IDs)

TABLES

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Table 2.1 – Design and Operating Parameters Amine Contactor Inlet KO Drum 135-V-01 Table 2.2 – Design and Operating Parameters Mercury Guard Beds 135-V-15 A/B Table 2.3 – Design and Operating Parameters Guard Bed Filters 135-W-06 A/B Table 2.4 – Design and Operating Parameters Amine Contactor 135-V-06 Table 2.5 – Design and Operating Parameters Amine Overhead Gas KO Drum 135-V-09 Table 2.6 – Design and Operating Parameters TEG Contactor 136-V-04 Table 2.7 – Design and Operating Parameters TEG Overhead KO Drum 136-V-23 Table 2.8 – Design and Operating Parameters Gas/Gas Exchanger 137-H-01 Table 2.9 – Design and Operating Parameters Low Temperature Separator 137-V-05 Table 2.10 – Design and Operating Parameters Sales Gas Metering Package 138-JY-01 Table 2.11 – Hazardous Sources

FIGURES

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Figure 2.1 – Gas Sweetening and Dehydration System Overview Figure 2.2 – Dehydration, Metering and Export Overview

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Section 2.0 – Gas Sweetening, Dehydration, Metering and Export Page ii



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INTRODUCTION

1.1

System Purpose/Function The Gas Sweetening, Dehydration, Metering and Export System is designed to process the gas produced from the wells to supply gas of the required specification for export to the Perusahaan Listrik Negara (PLN) Power Plant.

1.2

Primary Components The Gas Sweetening, Dehydration, Metering and Export System is located in the East and South East sections of the plant and is comprised of the following Primary Components: Tag No 135-V-01

Amine Contactor Inlet KO Drum Mercury Guard Beds

135-W-06A/B

Guard Bed Filters

135-V-06

Amine Contactor

135-V-09

Amine Overhead Gas KO Drum

136-V-04

TEG Contactor

136-V-23

TEG Overhead KO Drum

137-H-01

Gas/Gas Exchanger

137-V-05

Low Temperature Separator

138-JY-01

Sales Gas Metering Skid

Input interfaces:

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Primary Interfaces

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135-V-15A/B

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1.3

Equipment Title/Description

 Hydrocarbon Receiving and Separation (refer to Section 1.0 of this manual)  Flash Gas Compression (refer to Section 4.0 of this manual)

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 Amine Regeneration (refer to Section 7.0 of this manual)  TEG Regeneration (refer to Section 8.0 of this manual)  Instrument and Utility Air Systems (refer to Section 15.0 of this manual)  Integrated Control and Safety Systems (ICSS) (refer to Section 20.0 of this manual) Output interfaces:

 Flare Systems (refer to Section 9.0 of this manual)  Closed Drains (refer to Section 10.0 of this manual)


Section 2.0 – Gas Sweetening, Dehydration, Metering and Export Page 1 of 27



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SYSTEM DESCRIPTION

2.1

System Overview Refer to Overview Figures 2.1 and 2.2. Process gas (sour) from Production Separator 132-V-01 is routed to the H2S Removal Unit, which utilises Methyl Di-Ethanol Amine (MDEA) solvent to limit the H2S concentration in the product gas. The package also includes the regeneration of the solvent used to absorb H2S and mercury removing facilities. Sweet gas exiting the H2S Removal System flows to the Tri-ethylene Glycol (TEG) Dehydration Unit to reduce the dew point of the process gas by contacting with lean glycol supplied from the TEG Regeneration System.

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Dry gas from the Dehydration Unit flows to the Gas Dew Point Control Unit, which further reduces the dew point of the process gas in order to achieve the required hydrocarbon dew point and sales gas specification.

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The Sales Gas is exported to the PLN Power Plant by pipeline via Sales Gas Metering Package 138-JY-01, which measures the physical properties of the sales gas.





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Process Systems Operations Manual Figure 2.1 – Gas Sweetening and Dehydration System Overview

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Process Systems Operations Manual Figure 2.2 – Dehydration, Metering and Export Overview

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Primary Flow Description Refer to Rev 10 of the following P&IDs:  UPD-IJ-P1-PR-DR-0015-01-10 Amine Contactor Inlet KO Drum  UPD-IJ-P1-PR-DR-0015-02-10 Mercury Guard Beds  UPD-IJ-P1-PR-DR-0015-03-10 Guard Bed Filters  UPD-IJ-P1-PR-DR-0016-10 Amine Contactor  UPD-IJ-P1-PR-DR-0017-10 Amine Overhead Gas KO Drum  UPD-IJ-P1-PR-DR-0040-10 TEG Contactor  UPD-IJ-P1-PR-DR-0041-10 TEG Overhead KO Drum  UPD-IJ-P1-PR-DR-0061-10 Gas/Gas Exchanger

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 UPD-IJ-P1-PR-DR-0062-10 Low Temperature Separator  UPD-IJ-P1-PR-DR-0063-01-10 Sales Gas Pipeline

 UPD-IJ-P1-PR-DR-0063-02-10 Sales Gas Metering Package  UPD-IJ-P1-PR-DR-0063-03-10 Sales Gas Line to PLN Gas Sweetening

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2.2.1

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Sour process gas from Production Separator 132-V-01 is routed to the H2S Removal Unit, which consists of Amine Contactor Inlet Knock Out (KO) Drum 135-V-01, Amine Contactor 135-V-06 and Amine Overhead Gas KO Drum 135-V-09. The feed gas from Amine Contactor Inlet KO Drum 135-V-01 flows to Mercury Guard Beds 135-V-15 A/B and Guard Bed Filters 135-W-06 A/B for initial treatment. The mercury guard beds remove mercury from the gas stream before the gas flows to the amine contactor. The gas stream leaving the mercury guard beds picks up dust as it passes through the adsorbent bed. The guard bed filters are provided downstream of the mercury guard beds to remove the dust from the gas stream.

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H2S Removal Unit utilises Methyl Di-Ethanol Amine (MDEA) solvent to limit the H2S concentration in the product gas to 16ppmv to conform to sales gas specification. The package also includes the regeneration of the solvent used to absorb H2S (refer to Section 7.0 of this manual – Amine Regeneration). 2.2.2

Dehydration

Sweet gas exiting the H2S Removal System flows to the TEG Dehydration Unit, which consists of the following equipment:  TEG Contactor 136-V-04

 TEG Overhead KO Drum 136-V-23 Within the TEG contactor the water content of the gas is reduced by contact with lean glycol supplied from the Glycol Regeneration System (refer to Volume 8 of this manual – TEG Regeneration).





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Process Systems Operations Manual 2.2.3

Dew Point Control

The main purpose of the Gas Dew Point Control System is to produce sweet, dry sales gas. Dry gas from the Dehydration Unit flows to the Gas Dew Point Control Unit to achieve a hydrocarbon dew point of 13°C at 27.58barg. Dry gas is cooled through Gas/Gas Exchanger 137-H-01 and through Joule-Thompson (JT) valves to meet sales gas specification. (As the pressure is reduced across the PV, the temperature drops due to the Joule Thompson effect resulting in liquid droplets appearing in the gas stream). Any entrained liquids are separated in Low Temperature Separator 137-V-05, fall to the bottom as momentum is reduced and are drained to 2nd Stage Flash Gas Suction Scrubber 139V-04. 2.2.4

Metering and Export

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The Sales Gas is exported to the PLN Power Plant by pipeline via Sales Gas Metering Package 138-JY-01, which measures the flow and British Thermal Unit (BTU) value of sales gas. Gas metering is located at the PLN area.

3.0

EQUIPMENT DESCRIPTION

3.1

Amine Contactor Inlet KO Drum 135-V-01

Refer to P&ID: UPD-IJ-P1-PR-DR-0015-01-10 Rev 10 Amine Contactor Inlet KO Drum. 3.1.1

Function

3.1.2

Technical Data

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Sour gas from the production separator flows to Amine Contactor Inlet KO Drum 135-V-01 prior to entering Amine Contactor 135-V-06. The inlet KO drum provides gas filtration to a nominal level of 10 micron to ensure that no contaminant is carried forward in the amine solution.

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For details of the design and operating parameters, refer to Table 2.1 – Design and Operating Parameters Amine Contactor Inlet KO Drum 135-V-01. Table 2.1 – Design and Operating Parameters Amine Contactor Inlet KO Drum 135-V-01

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Parameter Pressure

Temperature (Max/Min) Volume 3.1.3

Design

Operating

70barg/full vacuum

45.8barg

65°C/0°C

28.2°C

15.84m

3

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Technical Description

Amine Contactor Inlet KO Drum 135-V-01 is comprised of two horizontal cylindrical vessels, a filter separator with a liquid boot located below. The gas filter separator is constructed from NACE carbon steel with an inside diameter (ID) of 1042mm and is 2642mm tan to tan (T/T). The vessel is lined internally with a 3.0mm coating of glass flake vinyl ester. The liquid boot has an OD of 24in and the filter separator vessel has a man-way in the inlet end to allow access to the filter cartridges.





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Process Systems Operations Manual Sour wet gas from the production separator enters the inlet KO drum through a 16in inlet in the top of the vessel. The gas carrying the liquid droplets flows into the second compartment through the filter cartridges where it passes through a vane pack to remove droplets and exits via a 16in outlet in the end of the vessel to the amine contactor. The smaller diameter lower vessel is also divided into two separate compartments. The first compartment collects the liquids recovered by the filter cartridges, which flow under level control to Liquid Separator 132-V-02. The second compartment collects the liquids recovered by the vane pack, which also flows under level control to the liquid separator.

3.2

Mercury Guard Beds 135-V-15 A/B Refer to P&ID: UPD-IJ-P1-PR-DR-0015-02-10 Rev 10 Mercury Guard Beds. 3.2.1

Function

3.2.2

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Mercury Guard Beds 135-V-15 A/B are provided to remove mercury from the sour gas stream. Technical Data

For details of the design and operating parameters, refer to Table 2.2 – Design and Operating Parameters Mercury Guard Beds 135-V-15 A/B.

Parameter Pressure Temperature

Design

Operating

70barg/Full Vacuum

45.8barg

65°C/0°C

28.2°C


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3.2.3

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Table 2.2 – Design and Operating Parameters Mercury Guard Beds 135-V-15 A/B

The Mercury Guard Beds 135-V-15 A/B are vertical cylindrical vessels, which hold the adsorbent required to remove mercury from the gas stream.

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The vessels have an ID of 2400mm and a height of 4300mm T/T. The vessels are constructed from NACE carbon steel and are lined internally with a 3.0mm coating of glass flake vinyl ester. The gas inlet is located on the flanged top of the vessel above the adsorbent bed. The mercury guard beds are operated in lead/lag configuration, the treated gas leaves the vessel through an outlet at the base of the vessel. So that flow is not concentrated from one point in the bottom of the bed, a distributor is installed at the nozzle to ensure gas flows evenly from all areas of the bed. A 24in man-way is provided, on the side of the vessel to provide access for adsorbent change out. Four teflon lined sample points are provided at intervals on the side of the vessel. This allows gas to be sampled as it passes through the bed to determine the effectiveness of the adsorbent. If the lead vessel indicates contamination it is taken off-line for adsorbent replacement then returned to service as lag duty.





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Guard Bed Filters 135-W-06 A/B Refer to P&ID: UPD-IJ-PI-PR-DR-0015-03-10 Rev 10 Guard Bed Filters. 3.3.1

Function

Guard Bed Filters 135-W-06 A/B are provided to prevent fouling in the downstream equipment. 3.3.2

Technical Data

For details of the design and operating parameters, refer to Table 2.3 – Design and Operating Parameters Guard Bed Filters 135-W-06 A/B. Table 2.3 – Design and Operating Parameters Guard Bed Filters 135-W-06 A/B

Pressure Temperature 3.3.3


Design

Operating

70barg/Full Vacuum

45.7barg

65°C/0°C

28.1°C

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Parameter

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The 2 x 100% Guard Bed Filters 135-W-06 A/B are vertical cylindrical vessels. The vessels have an ID of 610mm and a height of 2670mm, T/T. They are constructed from NACE carbon steel, are lined internally with a 3.0mm coating of glass flake vinyl ester and have polypropylene filter elements. The treated gas leaves the guard bed filters with the desired concentration of mercury of < 0.01mg/m3.

3.4

Amine Contactor 135-V-06 3.4.1

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Refer to P&ID: UPD-IJ-P1-PR-DR-0016-10 Rev 10 Amine Contactor. Function

The function of Amine Contactor 135-V-06 is to remove H2S from the wet sour gas using an amine solution, which absorbs the H2S. Technical Data

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3.4.2

For details of the design and operating parameters, refer to Table 2.4 – Design and Operating Parameters Amine Contactor 135-V-06. Table 2.4 – Design and Operating Parameters Amine Contactor 135-V-06 Parameter

Pressure

Temperature


Design

Operating Top

Bottom

70barg/Full Vacuum

45.7barg

46.3barg

65°C/0°C

44.1°C

28.1°C




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The Amine Contactor is a vertical vessel manufactured from NACE carbon steel, clad in stainless steel 316L, has stainless steel 316L internals and measures 2200 x 12910mm (ID x T/T). There is no insulation covering the vessel. This vessel is furnished with the following fitments:  Pipe Branch Distributor  Trays  Demisters  Vortex Breakers  Skimming Bucket

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 Manway Covers A pipe branch distributor ensures an even distribution of sour gas entering the vessel to give maximum area exposure between the amine and the sour gas. The pipe branch distributor is manufactured from stainless steel 316L.

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The trays, which are at 12 levels, increase the surface level of the amine against the counter flow of the sour gas for maximum efficiency. The amine contactor primary lean amine inlet stream located at the 1st tray and the other inlet streams at 3rd and 5th tray respectively. A demister sits in the sweetened gas outlet located at the top of the contactor to remove any droplets of liquid. Vortex breakers are fitted to the amine outlet in the bottom of the contactor and on the outlet of the skimming bucket to closed drains header.

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Hydrocarbons floating on top of the amine are skimmed off into a skimming bucket and flows to closed drains header. There are two 24in manway covers situated on at the top of the vessel and one at the bottom.

3.5

Amine Overhead Gas KO Drum 135-V-09

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Refer to P&ID: UPD-IJ-P1-PR-DR-0017-10 Rev 10 Amine Overhead Gas KO Drum 135-V-09. 3.5.1

Function

The function of Amine Overhead Gas KO Drum 135-V-09 is to knock out any liquids carried over in the gas from the amine contactor. This is achieved by the action of gas flowing from a pipe into a vessel, which reduces the velocity of the gas causing liquid drop out. 3.5.2

Technical Data

For details of the design and operating parameters, refer to Table 2.5 – Design and Operating Parameters Amine Overhead Gas KO Drum 135-V-09.





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Table 2.5 – Design and Operating Parameters Amine Overhead Gas KO Drum 135-V-09 Parameter Pressure Temperature 3.5.3

Design

Operating

70barg/Full Vacuum

45.5barg

65°C/0°C

44.4°C


Amine Overhead Gas KO Drum 135-V-09 is a vertical vessel manufactured from NACE carbon steel, with stainless steel 316L internal fitments and has an ID of 1220mm and a height of 3962mm T/T. This vessel is furnished with the following fitments:

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 Baffle Plates  Vortex Breaker  Manway Cover

Baffle plates manufactured from stainless steel 316L are fitted to aid the knock out of liquids.

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A vortex breaker manufactured from stainless steel 316L is fitted to the liquid outlet. A 24in manway cover is installed in the side of the vessel for inspection purposes. Knocked out liquids flow to the amine flash drum through Shutdown Valve 135-SDV-243 and control valve 135-LV-168. Gas exits the vessel to the TEG Contactor on a 14in line.

3.6

TEG Contactor 136-V-04 3.6.1

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Refer to P&ID: UPD-IJ-P1-PR-DR-0040-10 Rev 10 TEG Contactor. Function

TEG Contactor 136-V-04 is provided to reduce the water dew point of the gas stream prior to gas export. Technical Data

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3.6.2

For details of the design and operating parameters, refer to Table 2.6 – Design and Operating Parameters TEG Contactor 136-V-04. Table 2.6 – Design and Operating Parameters TEG Contactor 136-V-04 Parameter

Pressure

Temperature


Design

Operating

70barg/Full Vacuum

45.16barg

65°C/0°C

43.85/44.25°C




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TEG Contactor 136-V-04 is a vertical column vessel with structured packing. The vessel has an ID of 1524mm and a height of 10986mm T/T. It is constructed from NACE carbon steel and the bottom portion of the vessel, up to the structured packing, is lined internally with a 3.0mm coating of glass flake vinyl ester. Incoming gas is evenly distributed over the cross-sectional area by an inlet distributor. In this distributor, inlet momentum of gas-liquid mixture is broken to enable disengagement of gas from liquid and to ensure proper distribution of gas through the column. After the removal of free liquids the gas enters the absorber section. Dehydration of the gas takes place across a 3890mm high structured packing, against a counter current flow of lean TEG.

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The dehydrated gas leaves top of the column, passes through a 200mm vane pack, a 150mm stainless steel mesh and a 150mm fibre mesh. The mist eliminators are provided to remove entrained glycol before leaving the tower. Rich TEG from the contactor is discharged from the bottom of the vessel through a vortex breaker fitted at the outlet to TEG Regeneration Package 136-MY-02. Gas leaving the contactor is to be dehydrated to maximum water content of 112.4mg/sm3 for a temperature of approximately 45.97°C.

3.7

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The medium used as the drying agent is TEG which, following regeneration, has a quality of 98.91wt%. TEG provides good dehydration combined with minimal loss from vaporisation and degradation.

TEG Overhead KO Drum 136-V-23

Refer to P&ID: UPD-IJ-P1-PR-DR-0041-10 Rev 10 TEG Overhead KO Drum. Function

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3.7.1

The function of TEG Overhead KO Drum 136-V-23 is to contain any liquid carry over from the gas prior to flowing to Gas/Gas Exchanger 137-H-01. 3.7.2

Technical Data

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For details of the design and operating parameters, refer to Table 2.7 – Design and Operating Parameters TEG Overhead KO Drum 136-V-23. Table 2.7 – Design and Operating Parameters TEG Overhead KO Drum 136-V-23 Parameter

Pressure

Temperature


Design

Operating

70barg/Full Vacuum

44.26barg

65°C/0°C

45.64°C/46.01°C




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TEG Overhead KO Drum 136-V-23 is a vertical separator vessel. The vessel has an ID of 1220mm and a height of 2540mm, T/T. It is constructed from NACE carbon steel and is lined internally with a 3.0mm coating of glass flake vinyl ester. Dehydrated gas flowing from the drum to Gas/Gas Exchanger 137-H-01 passes through a 6in thick 9bs/ft3 mesh with a maximum carry over of liquid droplet size of less than 70 microns. The mist eliminator is provided to remove entrained TEG. TEG recovered in the drum accumulates in the bottom of the vessel and is routed via a vortex breaker at the outlet line to TEG Flash Drum 136-V-16.

3.8

Gas/Gas Exchanger 137-H-01 Refer to P&ID: UPD-IJ-P1-PR-DR-0061-10 Gas/Gas Exchanger. Function

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3.8.1

Gas/Gas Exchanger 137-H-01 utilizes the cold gas leaving the low temperature separator in order to cool the gas from the TEG overhead knock out drum. 3.8.2

Technical Data

For details of the design and operating parameters, refer to Table 2.8 – Design and Operating Parameters Gas/Gas Exchanger 137-H-01.

Pressure Temperature

3.8.3

Design

Operating

Hot

Cold

Hot

Cold

70barg

70barg

43.16barg

31.03barg

75°C/-32°C

75°C/-32°C

45.9°C/ 16.98°C

10.73°C/ 41.17°C

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Parameter

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Table 2.8 – Design and Operating Parameters Gas/Gas Exchanger 137-H-01


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Gas/Gas Exchanger 137-H-01 is a special Printed Circuit Heat Exchanger (PCHE) design that has 20% additional surface area. The exchanger has a design duty of 2877kW and is insulated for cold conservation. Duplex type strainers located at each gas inlet protect the exchanger in order to avoid outsize particles entering or bridging the passages. A chemical injection point is provided on the hot gas inlet of the exchanger to allow injection of hydrate inhibitor (methanol).





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Low Temperature Separator 137-V-05 Refer to P&ID: UPD-IJ-P1-PR-DR-0062-10 Low Temperature Separator. 3.9.1

Function

Low Temperature Separator 137-V-05 removes liquid from the pre-cooled gas exiting the gas/gas exchanger. 3.9.2

Technical Data

For details of the design and operating parameters, refer to Table 2.9 – Design and Operating Parameters Low Temperature Separator 137-V-05. Table 2.9 – Design and Operating Parameters Low Temperature Separator 137-V-05 Design

Pressure Temperature 3.9.3


Operating Top

Bottom

70barg/Full Vacuum

32barg

32.3barg

75°C/-13°C

10.8°C

10.9°C

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Parameter

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Low Temperature Separator 137-V-05 is a vertical, stainless steel, two phase separator with an inside diameter of 1372mm and has a height of 4216mm, tan to tan. Gas enters the vessel through a 16in inlet in the upper half of the vessel. A vane type inlet diffuser is provided at the inlet to reduce the inertia of the gas entering the vessel enabling entrained droplets to leave the stream.

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To ensure liquid droplets are not carried over in the gas stream, a vane pack and demister is provided at the 16in gas outlet. Liquids removed from the gas stream are collected at the mist extractor and flow to the bottom of the vessel through a down pipe.

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Separated liquid leaves the vessel through a 2in outlet at the lowest point of the vessel, which is fitted with a vortex breaker and routed to the 2nd stage flash gas suction scrubber. A 24in manway is provided on the side of the vessel, near the bottom of the vessel to provide access for maintenance purposes.





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Sales Gas Metering Package 138-JY-01 Refer to P&ID: UPD-IJ-P1-DR-0063-02-10 Rev 10 Sales Gas Metering Package. 3.10.1

Function

Sales Gas Metering Package 138-JY-01 is provided to measure, to fiscal standards, the gas export quantity and quality entering the export flow line to the PLN plant. 3.10.2

Technical Data

For details of the design and operating parameters, refer to Table 2.10 – Design and Operating Parameters Sales Gas Metering Package 138-JY-01. Table 2.10 – Design and Operating Parameters Sales Gas Metering Package 138-JY-01 Design

Operating

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Parameter Pressure

41.4barg

28.96barg/30.78barg

60/0°C

28°C

Capacity of each train

Max 150MMscfd/ Min20MMscfd

144MMscfd

Number of Meter trains

2 x 100%

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3.10.3

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Temperature


Gas from Gas/Gas Exchanger (137-H-01) flows to the Sales Gas Metering Package 138-JY-01, which comprises the following:  Flow Metering System

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 Gas Chromatograph

The metering package consists of 2 x 100% meter trains – one in service and one in standby with skid mounted orifice meters utilising senior type orifice fittings.

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The flow meter on each stream is located downstream a flow profiler, designed to eliminate turbulent flow. Pressure and temperature transmitters are provided on each stream to compensate the flow readings. Three orifice plates are supplied for each stream to provide the maximum possible accuracy during turndowns in gas sales. The three plates are chosen so that any flow from 20 to 165MMSCFD can be metered by installation of a suitable orifice plate. The individual meter runs on the metering skids are provided with actuated isolation valves for switching of streams. An online gas chromatograph is installed to continually measure the sales gas composition. The components to be measured are C1 through C6+, CO2, and N2. The gas chromatograph analyses the gas and transmits the composition data to the individual stream flow computers. The stream flow computer computes the GHV of the gas being supplied in the associated meter run.





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4.0

INSTRUMENTATION AND CONTROL

4.1

Amine Contactor Inlet KO Drum 135-V-01 Refer to P&ID: UPD-IJ-P1-PR-DR-0015-01-10 Rev 10 Amine Contactor Inlet KO Drum. 4.1.1

Pressure

The differential pressure of Amine Contactor Inlet KO Drum 135-V-01 is monitored by Pressure Differential Transmitter 135-PDT-305, which provides a signal to Pressure Differential Indicator 135-PDI-305 on the ICSS. The indicator also provides a High alarm. Overpressure protection for the KO drum is provided by Pressure Safety Valve 135-PSV-249 set to relieve at 70barg, sized for fire case.

4.1.2

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Shutdown Valve 135-SDV-240 is provided on the gas inlet from the production separator. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD system. Level

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Liquid level in Amine Contactor Inlet KO Drum 135-V-01 lower vessel first compartment is monitored by Level Transmitter 135-LT-165 which provides an on/off control signal to Level Indicating Controller 135-LIC-165 on the ICSS. Level Indicating Controller 135-LIC-165 operates Level Control Valve 135-LV-165 on the liquid outlet to Liquid Separator 132-V-01. The controller also provides a High and Low level alarm on the ICSS. Protection against high level in the first compartment is provided by Level Switch 135-LS-101, which provides a High High level alarm and shutdown signal on the ICSS through 135-LZ-101.

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Protection against low level in the first compartment is provided by Level Switch 135-LS-166, which provides a Low Low level alarm and shutdown signal on the ICSS through 135-LZ-166. Level Gauge 135-LG-177 provides local indication of the level in the lower vessel first compartment.

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Shutdown Valve 135-SDV-239 is provided on the lower vessel first compartment liquid outlet. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD system. Liquid level in the Amine Contactor Inlet KO Drum 135-V-01 lower vessel second compartment is monitored by Level Transmitter 135-LT-352, which provides an on/off control signal to Level Indicating Controller 135-LIC-352 on the ICSS. Level Indicating Controller 135-LIC-352 operates Level Control Valve 135-LV-352 on the liquid outlet to Liquid Separator 132-V-01. The controller also provides a High and Low level alarm on the ICSS. Protection against high level in the second compartment is provided by Level Switch 135-LS-344, which provides a High High level alarm and shutdown signal on the ICSS through 135-LZ-344. Protection against low level in the second compartment is provided by Level Switch 135-LS-345, which provides a Low Low level alarm and shutdown signal on the ICSS through 135-LZ-345.





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Process Systems Operations Manual Level Gauge 135-LG-351 provides local indication of the level in the lower vessel second compartment. Shutdown Valve 135-SDV-353 is provided on the lower vessel second compartment liquid outlet. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD system.

4.2

Mercury Guard Beds 135-V-15A/B Refer to P&ID: UPD-IJ-P1-PR-DR-0015-02-10 Rev 10 Mercury Guard Beds. 4.2.1

Pressure

The differential pressure across Mercury Guard Bed 135-V-15A is monitored by Pressure Differential Transmitter 135-PDT-432, which provides a signal to Pressure Differential Indicator 135-PDI-432 on the ICSS. The indicator also provides a High differential pressure alarm on the ICSS.

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Pressure Indicator 135-PI-430 provides local indication of Mercury Guard Bed 135-V-15A inlet pressure. Pressure Indicator 135-PI-448 provides local indication of Mercury Guard Bed 135-V-15A outlet pressure. Overpressure protection for Mercury Guard Bed 135-V-15A is provided by Pressure Safety Valve 135-PSV-347 set to relieve at 70barg, sized for fire case.

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The differential pressure across Mercury Guard Bed 135-V-15B is monitored by Pressure Differential Transmitter 135-PDT-433, which provides a signal to Pressure Differential Indicator 135-PDI-433 on the ICSS. The indicator also provides a High differential pressure alarm on the ICSS. Pressure Indicator 135-PI-431 provides local indication of Mercury Guard Bed 135-V-15B inlet pressure.

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Pressure Indicator 135-PI-449 provides local indication of Mercury Guard Bed 135-V-15B outlet pressure. Overpressure protection for Mercury Guard Bed 135-V-15A is provided by Pressure Safety Valve 135-PSV-348 set to relieve at 70barg, sized for fire case.

Guard Bed Filters 135-W-06A/B

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4.3

Refer to P&ID: UPD-IJ-PI-PR-DR-0015-03-10 Rev 10 Guard Bed Filters. 4.3.1

Pressure

Pressure Differential Indicator 135-PDI-438 provides local indication of Guard Bed Filter 135-W-06A differential pressure. Pressure Indicator 143-PI-436 provides local indication of Guard Bed Filter 135-W-06A pressure. Overpressure protection for Guard Bed Filter 135-W-06A is provided by Pressure Safety Valve 135-PSV-349 set to relieve at 70barg, sized for fire case. Pressure Differential Indicator 135-PDI-450 provides local indication of Guard Bed Filter 135-W-06B differential pressure.





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Process Systems Operations Manual Pressure Indicator 143-PI-437 provides local indication of Guard Bed Filter 135-W-06B pressure. Overpressure protection for Guard Bed Filter 135-W-06B is provided by Pressure Safety Valve 135-PSV-350 set to relieve at 70barg, sized for fire case.

4.4

Amine Contactor 135-V-06 Refer to P&ID: UPD-IJ-P1-PR-DR-0016-10 Rev 10 Amine Contactor. 4.4.1

Pressure

The pressure in Amine Contactor 135-V-06 is monitored by Pressure Transmitter 135-PT-117, which provides a signal to Pressure Indicator 135-PI-117 on the ICSS. The indicator also provides a Low pressure alarm on the ICSS.

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The differential pressure across Amine Contactor 135-V-06 is monitored by Pressure Differential Transmitter 135-PDT-113, which provides a signal to Pressure Differential Indicator 135-PDI-113 on the ICSS. The indicator also provides a High differential pressure alarm on the ICSS. Pressure Indicator 135-PI-115 provides local indication of gas inlet pressure. Overpressure protection for the contactor is provided by Pressure Safety Valve 135-PSV-250 set to relieve at 70barg, sized for fire case. Temperature

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4.4.2

Amine Contactor 135-V-06 gas inlet temperature is monitored by Temperature Transmitter 135-TT-210, which provides a signal for Temperature Indicator 135-TI-210 on the ICSS. The temperature at Tray 1 of the contactor is monitored by Temperature Transmitter 135-TT-186, which provides a signal to Temperature Indicator 135-TI-186 on the ICSS. The indicator also provides a High temperature alarm on the ICSS.

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The temperature at Tray 4 of the contactor is monitored by Temperature Transmitter 135-TT-121, which provides a signal to Temperature Indicator 135-TI-121 on the ICSS. The temperature at Tray 9 of the contactor is monitored by Temperature Transmitter 135-TT-122, which provides a signal to Temperature Indicator 135-TI-122 on the ICSS. The indicator also provides a High temperature alarm on the ICSS.

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The temperature at Tray 12 is monitored by Temperature Transmitter 135-TT-188, which provides a signal to Temperature Indicator 135-TI-188 on the ICSS. The indicator also provides a High temperature alarm on the ICSS. The contactor gas outlet temperature is monitored by Temperature Transmitter 135-TT-211, which provides a signal to Temperature Indicator 135-TI-211 on the ICSS. The indicator also provides High and Low temperature alarms on the ICSS.





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Amine Overhead Gas KO Drum 135-V-09 Refer to P&ID: UPD-IJ-P1-PR-DR-0017-10 Rev 10 Amine Overhead Gas KO Drum. 4.5.1

Pressure

The gas outlet from Amine Overhead Gas KO Drum 135-V-09 is monitored by Pressure Transmitter 135-PT-109, which provides a signal to Pressure Indicating Controller 135-PIC-109 to modulate Pressure Control Valve 135-PV-109, located on the line to the HP Flare header. The controller also provides High and Low pressure alarms on the ICSS. Pressure Indicator 135-PI-119 provides local indication of gas outlet pressure. Overpressure protection for the KO drum is provided by Pressure Safety Valve 135-PSV-251 set to relieve at 70barg, sized for fire case. 4.5.2

Level

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The liquid level in Amine Overhead Gas KO Drum 135-V-09 is monitored by Level Transmitter 135-LT-168, which provides a signal to Level Indicating Controller 135-LIC-168 to modulate on/off Level Control Valve 135-LV-168. The controller also provides a High and Low level alarm on the ICSS.

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Protection against low level in the amine overhead gas KO drum is provided by Level Switch 135-LS-169, which provides a Low Low level alarm and shutdown signal on the ICSS through 135-LZ-169. Level Gauge 135-LG-213, provides local indication of the level in the KO drum. Shutdown Valve 135-SDV-243 is provided on the liquid outlet to the amine flash drum. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. Temperature

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4.5.3

Temperature Indicator 135-TI-189 provides local temperature indication of the gas outlet from Amine Overhead Gas KO Drum 135-V-09.

4.6

TEG Contactor 136-V-04

Refer to P&ID: UPD-IJ-P1-PR-DR-0040-10 Rev 10 TEG Contactor. Pressure

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4.6.1

The pressure above the structured packing section of TEG Contactor 136-V-04 is monitored by Pressure Transmitter 136-PT-189, which provides a signal to Pressure Indicator 136-PI-189 on the ICSS. The differential pressure across the structured packing is monitored by Pressure Differential Transmitter 136-PDT-105 which provides a signal to Pressure Differential Indicator 136-PDI-105 on the ICSS. The indicator also provides a High alarm on the ICSS. Pressure Indicator 135-PI-111 provides local indication of gas inlet pressure. Pressure Indicator 135-PI-204 provides local indication of gas outlet pressure. Overpressure protection for the contactor is provided by Pressure Safety Valve 136-PSV-174 set to relieve at 70barg, sized for fire case.





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Level

The TEG level in TEG Contactor 136-V-04 is monitored by Level Transmitter 136-LT-120 which provides a signal to Level Indicating Controller 136-LIC-120 on the ICSS. Level Indicating Controller 136-LIC-120 modulates Level Control Valve 136-LV-120 on the return line to TEG Reflux Condenser 136-H-209. The controller also provides a High and Low level alarm on the ICSS. Protection against a high level in the contactor is provided by Level Switch 136-LS-119 that provides a High High level alarm and shutdown signal on the ICSS through 136-LZ-119. Protection against a low level in the contactor is provided by Level Switch 136-LS-220 that provides a Low Low level alarm and shutdown signal on the ICSS through 136-LZ-220. Level Gauge 136-LG-104 provides local indication of the level in the contactor. Temperature

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4.6.3

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The gas inlet temperature to TEG Contactor 136-V-04 is monitored by Temperature Transmitter 136-TT-147, which provides a signal to Temperature Indicator 136-TI-147 on the ICSS. Temperature Indicator 136-TI-147 and Temperature Transmitter 136-TT-155, located downstream of TEG Cooler 136-H-07 (refer to Section 8 TEG Regeneration) provide inputs to Temperature Differential Indicating Controller 136-TDIC-155. The controller compares the signal from Temperature Transmitter 136-TT-155 with the signal from Temperature Indicator 136-TI-147 and maintains the required differential in temperature by regulating the speed of the two fan motors using Variable Frequency Drive (VFD) speed control. Temperature Indicator 136-TI-147 also provides High and Low temperature alarms on the ICSS. Temperature Indicator 136-TI-205 provides local temperature indication of the gas outlet from the TEG contactor.

TEG Overhead KO Drum 136-V-23

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4.7

Refer to P&ID: UPD-IJ-P1-PR-DR-0041-10 Rev 10 TEG Overhead KO Drum. 4.7.1

Pressure

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The pressure of the gas outlet from TEG Overhead KO Drum 136-V-23 is monitored by Pressure Transmitter 136-PT-102, which provides a signal to Pressure Indicating Controller 136-PIC-102 to modulate Pressure Control Valve 136-PV-102, located on the line to the HP Flare header. The controller also provides High and Low pressure alarms on the ICSS. Blowdown Valve 136-BDV-173 is provided on the gas outlet from TEG Overhead KO Drum. The valve fails open and the air to the valve is switched by a solenoid valve initiated from a common hand switch. Shutdown Valve 136-SDV-171 is provided on the gas outlet from TEG Overhead KO Drum. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. Overpressure protection for the KO drum is provided by Pressure Safety Valve 136-PSV-175 set to relieve at 70barg, sized for fire case.





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Level

The TEG level in TEG Overhead KO Drum 136-V-23 is monitored by Level Transmitter 136-LT-121, which provides a signal to Level Indicating Controller 136-LIC-121 to modulate on/off Level Control Valve 136-LV-120 on the return line to TEG Flash Drum 136-V-16. The controller also provides a High and Low level alarm on the ICSS. Protection against a high level in the drum is provided by Level Switch 136-LS-122 that provides a High High level alarm and shutdown signal on the ICSS through 136-LZ-122. Protection against a low level in the drum is provided by Level Switch 136-LS-109 that provides a Low Low level alarm and shutdown signal on the ICSS through 136-LZ-109. Level Gauge 136-LG-131 provides local indication of the level in the drum.

4.7.3

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Shutdown Valve 136-SDV-170 is provided on the liquid outlet from TEG Overhead KO Drum. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. Analysis

Analyzer Transmitter 136-AT-264 monitors the H2S content of the gas from TEG Overhead KO Drum 136-V-23 and provides a signal to Analyzer Indicator 136-AI-264 on the ICSS and provides a High High H2S alarm and shutdown signal on the ICSS through 136-AZ-264.The indicator also provides a High H2S alarm on the ICSS.

4.8

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Analyzer Transmitter 136-AT-187 monitors the moisture content of the gas from TEG Overhead KO Drum and provides a signal to Analyzer Indicator 136-AI-187 on the ICSS. The indicator also provides a High moisture alarm on the ICSS.

Gas/Gas Exchanger 137-H-01

Refer to P&ID: UPD-IJ-P1-PR-DR-0061-10 Rev 10 Gas/Gas Exchanger. Pressure

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4.8.1

Pressure Indicator 137-PI-128 provides local indication of gas inlet pressure from the TEG overhead KO drum.

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Pressure Differential Indicator 135-PDI-352 provides local indication of differential pressure across the duplex type strainer at the gas inlet from the TEG overhead KO drum. Pressure Differential Indicator 135-PDI-351 provides local indication of differential pressure across the duplex type strainer at the gas inlet from the LT separator. Pressure Indicator 137-PI-129 provides local indication of gas outlet pressure to sales gas pipeline. Pressure Differential Transmitter 137-PDT-132 monitors differential pressure across Gas/Gas Exchanger 137-H-01, between the inlet from the LT separator and the outlet to the sales gas pipeline and provides a signal to Pressure Differential Indicator 137-PDI-132 on the ICSS. The indicator also provides a High differential pressure alarm on the ICSS. Pressure Differential Transmitter 137-PDT-133 monitors the differential pressure across the gas/gas exchanger, between the inlet from the TEG overhead KO drum and the outlet to the LT separator and provides a signal to Pressure Differential Indicator 137-PDI-133 on the ICSS. The indicator also provides a High differential pressure alarm on the ICSS.





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Process Systems Operations Manual Blowdown Valve 137-BDV-121 is provided on the exchanger outlet to the LT separator. The valve fails open and the air to the valve is switched by a solenoid valve initiated from a common hand switch. Blowdown Valve 137-BDV-122 is provided on the exchanger outlet to the sales gas pipeline. The valve fails open and the air to the valve is switched by a solenoid valve initiated from a common hand switch. Overpressure protection for the gas/gas exchanger is provided by Pressure Safety Valve 137-PSV-138 set to relieve at 70barg, sized for fire case. 4.8.2

Temperature

Temperature Indicator 137-TI-109 provides local indication of gas inlet temperature from the TEG overhead KO drum.

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Temperature Transmitter 137-TT-112 monitors gas inlet temperature from TEG overhead KO drum and provides a signal to Temperature Indicator 137-TI-112 on the ICSS. The indicator also provides a High temperature alarm on the ICSS. Temperature Indicator 137-TI-120 provides local indication of gas outlet temperature to the LT separator.

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Temperature Transmitter 137-TT-113 monitors gas outlet temperature to LT separator and provides a signal to Temperature Indicator 137-TI-113 on the ICSS. The indicator also provides a High temperature alarm on the ICSS. Temperature Transmitter 137-TT-141 is located on the inlet to Gas/Gas Exchanger from the LT separator and provides a signal to split range Temperature Indicating Controller 137-TIC-141 to modulate Temperature Control Valves 137-TV-141A/B.

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Temperature Control Valve 137-TV-141A operates in a signal range of 0-50% and will open to correspond to a decrease in temperature until fully open then if the temperature continues to drop, Temperature Control Valve 137-TV-141B operating in a signal range of 50-100% will start to close, diverting the gas flow to bypass the gas/gas exchanger. Temperature Indicator 137-TI-116 provides local indication of gas inlet temperature from LT separator.

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Temperature Indicator 137-TI-108 provides local indication of gas outlet temperature to sales gas pipeline. Temperature Transmitter 137-TT-111 monitors gas outlet temperature to sales gas pipeline and provides a signal to Temperature Indicator 137-TI-111 on the ICSS. The indicator also provides High and Low temperature alarms on the ICSS.





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Low Temperature Separator 137-V-05 Refer to P&ID: UPD-IJ-P1-PR-DR-0062-10 Rev 10 Low Temperature Separator. 4.9.1

Pressure

The gas inlet pressure to Low Temperature Separator 137-V-05 is monitored by Pressure Transmitter 137-PT-101, which provides a signal to Pressure Indicating Controller 137-PIC-101 to modulate Pressure Control Valves (JT valves) 137-PV-101A/B. The controller also provides High and Low pressure alarms on the ICSS. Pressure Indicator 137-PI-103 provides local indication of gas inlet pressure upstream the JT valves. Pressure Indicator 137-PI-104 provides local indication of gas inlet pressure downstream the JT valves.

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Pressure Indicator 137-PI-130 provides local indication of gas outlet pressure to the gas/gas exchanger. Overpressure protection for the separator is provided by Pressure Safety Valve 137-PSV-126 set to relieve at 70barg, sized for fire case. 4.9.2

Level

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The liquid level in Low Temperature Separator 137-V-05 is monitored by Level Transmitter 135-LT-106, which provides a signal to Level Indicating Controller 135-LIC-106 to modulate Level Control Valve 137-LV-106 on the discharge line to the 2nd Stage Flash Gas Suction Scrubber 139-V-04. The controller also provides a High and Low level alarm on the ICSS. Protection against a low level in the separator is provided by Level Switch 137-LS-135 that provides a Low Low level alarm and shutdown signal on the ICSS through 137-LZ-135.

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Protection against a high level in the separator is provided by Level Switch 137-LS-105 that provides a High High level alarm and shutdown signal on the ICSS through 137-LZ-105. Level Gauge 137-LG-107 provides local indication of the level in the separator.

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Shutdown Valve 137-SDV-117 is provided on the liquid outlet from Low Temperature Separator 137-V-05. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. 4.9.3

Temperature

Temperature Indicator 137-TI-110 provides local indication of the gas temperature downstream of the JT valves. The gas temperature downstream of the JT valves is monitored by Temperature Transmitter 137-TT-139, which provides a signal to Temperature Indicator 137-TI-139 on the ICSS. The indicator also provides Low temperature alarm on the ICSS. Protection against low temperature is provided by Temperature Transmitter 137-TT-140, which provides a Low Low temperature alarm and shutdown signal on the ICSS through 137-TZ-140.





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Sales Gas Metering Package 138-JY-01 and Sales Gas Pipeline Refer to P&ID: UPD-IJ-P1-DR-0063-01-10 Rev 10 Sales Gas Pipeline. Refer to P&ID: UPD-IJ-P1-DR-0063-02-10 Rev 10 Sales Gas and Metering Package. Refer to P&ID: UPD-IJ-P1-DR-0063-03-10 Rev 10 Sales Gas Line to PLN. 4.10.1

Meter Run Selection and Control

The flow of gas to export is measured to fiscal standards in Sales Gas Metering Package 138-JY-01. Sales Gas Metering Package 138-Y-01 consists of Meter Train A and Meter Train B, operating as one in service and one in standby. Meter Run selection is provided through Hand Controller 138-HC-121 located at the PLN Plant. 4.10.2

Pressure

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The sales gas pipeline pressure is monitored by Pressure Transmitter 137-PT-100, which provides a signal to Pressure Indicating Controller 137-PIC-100 to modulate Pressure Control Valve 137-PV-100 located on the line to the HP flare header. The controller also provides a High and Low pressure alarm on the ICSS. Protection against low and high pressure in the sales gas pipeline is provided by Pressure Transmitter 137-PT-142 that provides Low Low and High High alarm and shutdown signals through 137-PZ-142.

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Shutdown Valve 137-SDV-115 is provided on the gas inlet to the sales gas pipeline. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. Overpressure protection of the sales gas pipeline is provided by Pressure Safety Valves 137-PSV-137A/C set to relieve at 41.4barg and Pressure Safety Valve 137-PSV-137B set to relieve at 43.47barg. All safety valves are sized for blocked discharge.

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Pressure Indicator 138-PI-103/104 provides local pressure indication of the metering package pressure. The pressure in the sales gas line to PLN is monitored by Pressure Transmitter 138-PT-122, which provides a signal to Pressure Controller 138-PC-122 on the ICSS. The controller provides an input to Flow Selector 138-FY-121.

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Protection against high pressure in the sales gas line to PLN is provided by Pressure Transmitter 138-PT-120, which provides High High alarm and shutdown signal to the ICSS through 138-PZ-120. Shutdown Valve 138-SDV-199 is provided on the sales gas line to PLN. The valve fails closed and the air to the valve is switched by a solenoid valve controlled from the LSD System. 4.10.3

Flow

Flow Totalisers 138-FQI-101/102 receive compensated signals from:  Pressure Transmitters 138-PT-105/106  Temperature Transmitters 138-TT-107/108  Flow Transmitters 138-FT-101/102





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Temperature

Temperature Indicators 138-TI-109/110 provide local temperature indication of the metering package. Temperature Elements 138-TE-101/102 provide a signal for Temperature Recorder 138-TR-101/102 respectively. 4.10.5

Gas Quality

Gas chromatograph Analyser Transmitter 138-AT-111, located at the inlet to the metering package, continually measures the sales gas composition. The gas chromatograph analyses the gas and transmits the composition data to the selected in-service stream flow computer. The stream flow computer calculates the quality of the gas being supplied in the selected meter run.

ENVIRONMENTAL, HEALTH AND SAFETY REQUIREMENTS

5.1

General EHS Requirements 5.1.1

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5.0

Chemicals

The following chemicals are used in this system, or may be present under upset conditions:  Tri-ethylene Glycol (TEG)  Ucarsol GT10 (antifoam)  Methanol (antifreeze)

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 Methyl Di-Ethanol Amine (MDEA) (Ucarsol from Dow Chemical)

5.1.2

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Personnel should ensure that they are fully familiar with the Material Safety Data Sheet (MSDS) for each chemical, which details precautions and the protective apparel and equipment necessary when handling the chemicals. The precautions detailed must be adhered to at all times. Hazardous Sources

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Table 2.11 – Hazardous Sources lists potential hazardous sources that may be present under upset conditions affecting the Flare Systems. Table 2.11 – Hazardous Sources Hazard

Source

Hazardous Event

Effect

Hydrocarbon gas and liquid

Throughout system

Potential for injury due to contact with hazardous liquids Loss of containment and release of flammable gas

Low temperature Lines and vessels

LT Separator, Gas/Gas Exchanger

Potential for injury Potential for due to contact personnel injury with cold surfaces (-35°C)


Potential for personnel injury Un-ignited gas release and potential for fire/explosion

Control ICSS Fire and Gas Detection System

Lagging for personnel protection




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Hazard

Effect

High temperature Lines and vessels

TEG Contactor

Potential for injury Potential for due to contact personnel injury with hot surfaces (65°C)

Hot Glycol under pressure

TEG Contactor

Potential for injury Potential for personnel injury due to contact with hot contaminated glycol

Nitrogen

Purging operations

Exposure to

Potential for personnel asphyxiation

Control Lagging for personnel protection

Safety procedures

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5.2

Hazardous Event

Source

Specific Health and Safety Requirements

H2S exposure may cause:  Skin and/or eye irritation  Dizziness

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 Loss of appetite

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Ujung Pangkah production fluids may contain concentrations of Hydrogen Sulphide (H2S) up to 500ppmv. H2S is a colourless, flammable and toxic gas. It can react with steel to form iron Sulphide that can ignite when exposed to air. When burned it produces Sulphur Dioxide (SO2) which is also toxic. It is highly corrosive and may lead to metal embrittlement/fatigue.

 Dryness in nose and/or throat  Fatigue  Coughing

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 Headache  Nausea

 Loss of consciousness or death The correct use of Personal Protective Equipment (PPE) is fundamental in securing a safe and healthy place of work for all personnel. PPE shall be used in conjunction with appropriate health, environment and safety procedures that are designed to minimise the potential risk of harm or injury to personnel, while also promoting safe working practices.





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Specific Environmental Requirements To prepare the Gas Sweetening, Dehydration, Metering and Export System for the introduction of hydrocarbon gas, it is necessary to remove all air from the system. Nitrogen may be utilized for this purpose through the dedicated purge points, which are provided with the necessary isolation valves and a non-return valve. Similarly, when preparing equipment for maintenance, nitrogen may be used to purge hydrocarbons from the system before breaking containment and introducing air. When purging the system of air prior to introduction of hydrocarbons, the atmosphere in the system should be tested with an Oxygen Content Analyser to determine the level of oxygen remaining in the purged system.

NITROGEN IS AN ASPHYXIANT, AND IS COLOURLESS AND ODOURLESS: RAPID AND UNRECOGNISED LOSS OF CONSCIOUSNESS CAN OCCUR IN PERSONS EXPOSED TO A NITROGEN-ENRICHED ATMOSPHERE. WHEN USING NITROGEN, CARE SHOULD BE TAKEN TO ENSURE THAT NITROGEN ESCAPES ARE DISPERSED AND NOT ALLOWED TO COLLECT IN ENCLOSED AREAS.

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WARNING:

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When purging is being performed to remove hydrocarbons, a suitable test instrument, which uses thermal conductivity or infrared absorption, capable of detecting hydrocarbons in nitrogen should be used. Pelister type instruments cannot be used, as they require at least 13% oxygen to operate.

6.0

REFERENCE INFORMATION

6.1

Hess Corporation Company Documentation Document Number

Process Data Sheet for Amine Contactor Inlet KO Drum (135-V-06)

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UPD-IJ-PR-DS-135-V-01-D

Document Title

Process Data Sheet for Amine Contactor (135-V-06)

UPD-IJ-PR-DS-136-MY-02

Process Data Sheet for TEG Dehydration Package (136-MY-02)

UPD-IJ-PR-DS-137-H-01-D

Process Data Sheet for Gas/Gas Exchanger (137-V-05)


Process Data Sheet for Low Temperature Separator (137-V-05)

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UPD-IJ-PR-LT-0001-C2

6.2

Equipment List

Vendor Documentation

Document Number –


Document Title –




Ujung Pangkah


6.3

Engineering Drawings (PFDs, UFDs and P&IDs) Drawing Number

Drawing Title Amine Contactor Inlet KO Drum

UPD-IJ-P1-PR-DR-0016-10 Rev 10

Amine Contactor


Amine Overhead Gas KO Drum


TEG Contactor


TEG Overhead KO Drum


Gas/Gas Exchanger


Low Temperature Separator

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Sales Gas Pipeline

UPD-IJ-P1-PR-DR-0063-02-10 Rev 10

Sales Gas Metering Package

UPD-IJ-P1-PR-DR-0063-03-10 Rev 10

Sales Gas Line to PLN

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UPD-IJ-P1-PR-DR-0063-01-10 Rev 10




OPF-WODL-PRS-MPR-GNL-1165_F837.1

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