Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Tugas-03 K3

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HAZOP for MCHEDikerjakan oleh:KELOMPOK 1

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Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Description – LNG Plant (1/2)

2Source: www.Sciencedirect.com

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Description – LNG Plant (2/2)

3Source: www.chiyoda-corp.com

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Description – Liquefaction

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The C3MR LNG Process

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Description – Liquefaction - MCHE

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Source:PT. Badak NGL

MCHE

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Node - Overview

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Node Description:Feed gas outlet from 665-E104 through 665-E106 to 665-HV-151. This node includes the bypass line for 665-E107.

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Node – P&ID (1/3)

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665-E104

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Node – P&ID (2/3)

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665-E106MCHE

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Node – P&ID (3/3)

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665-E104

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

Risk Matrix

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Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

HAZOP Worksheet (1/5)

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Node Description:Feed gas outlet from 665-E104 through 665-E106 to 665-HV-151. This node includes the bypass line for 665-E107.

Parameter / Design Intention665-E106 will liquefy / sub cool the inlet feed gas.Feed to 665-E-106: Pressure = 63.9 bara, Temperature = -33.5 C, Flowrate = 1.08E6 kg/hrOutlet from 665-E-106: Pressure = 48.4 bara, Temperature = -115.1 C (Normal Sub cooled); Pressure = 48.4 bara, Temperature = -148 C, Flowrate = 0.65E6 kg/hr (Subcooler 665-E107 bypass case)

Related Equipment665-E106 Main Cryogenic Heat Exchanger (MCHE)

Related P&IDD-665-1225-218D-665-1225-220D-665-1225-224 Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

HAZOP Worksheet (2/5)

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No

Deviation

Cause Consequence Safeguard S L R Recommendation

1 No Flow Inadvertent closure of manual isolation valve on inlet to 665-E106 or 665-ESDV-102.Strainer blockage on inlet to 665-E106.

- Loss of LNG production.

- Liquid backflow to the inlet line from the tube side feed gas pass of the MCHE, resulting in cold LNG (-115 C) in Low Temp CS piping upstream of 665-ESDV-102.

- Low temperature in MR compressor, 666-K001, suction with potential for liquid carryover to the MR Compressor Suction Drum.

- Two check valves are provided downstream of 665-ESDV-102 to prevent reverse flow of LNG.

- 665-FALL-115 will activate 666-UZ-10 which will shut 665-ESDV-102. (To prevent contact of LNG with Low Temp CS)

- 666-TALL-001 for MR Compressor

- 666-LAHH-001 on 666-V001 trip the MR Compressor.

- 665-PDI-151 on the strainer to the inlet of 665-E106.

APCI: Evaluate the potential for Low Temp CS piping upstream of 665-ESDV-102 to come into contact with LNG due to a failure of ESDV-102 upon unit shutdown and considering the check valve provided may leak.

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

HAZOP Worksheet (3/5)

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No

Deviation

Cause Consequence Safeguard S L R Recommendation

2 More Flow

665-HV-152 fails open during normal operation

Decreased flow through 665-E107 resulting in warmer LNG temperature to 668-G001A/B with potential for hydraulic turbine damage.Generation of excessive flash gas in Unit 668 (Nitrogen Rejection Unit) and potential.

668-TC-803High temperature alarm on product inlet line to 668-G001A/B.

- (APCI): Interface - 668-TC-803 reaction to 665-HV-152 failing open and subsequent temperature increase will cut the feed rate resulting in Unit shutdown.

- Review the control response in this case to avoid shutting down the unit.

- Interface - Provide procedure and means for transition from normal operation to bypassing 665-E107 and reducing the feed to prevent excessive flashing of higher temperature LNG in Unit 668.

- Provide mismatch alarm on 665-HV-152.

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

HAZOP Worksheet (4/5)

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No

Deviation Cause Consequence

Safeguard S L R Recommendation

3 Less Flow 665-BDV-103 inadvertently open

Excessive flaring and less production.

- See suggestion in general node under operability to provide mismatch alarms on ESDVs and BDVs.

4 More Level No level in this node

5 Less Level No level in this node

6 More Pressure

See No Flow

7 Less Pressure

See More Flow

Source: RGX6 LNG Project

Kelompok 1 - Program Magister Managemen Gas, Universitas Indonesia

HAZOP Worksheet (5/5)

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No

Deviation Cause Consequence

Safeguard S L R Recommendation

8 More Temperature

Defrost heater malfuntion.

Degradation of aluminum material which could damage 665-E106 (MAWT = 65 C).

- 664-TAHH-336 will shutdown the steam heating (664-ESDV-303) for the defrost gas heater.

- 664-TC-332 High temperature alarm on the defrost gas system.

Safeguards considered adequate.

9 Less Temperature

No foreseen hazard

- - -

10 Contamination

Mercury contamination in the feed gas from upstream unit.

Potential for exchanger failure due to corrosion or amalgamation

Sampling downstream of the Mercury beds to ensure no mercury content in downstream feed gas.

Safeguard considered adeqaute.

Source: RGX6 LNG Project