Document Number: CEPN-AB-1A-09-P-900013

CEPN-AB-1A-09-P-900013

Document Number: CEPN-AB-1A-09-P-900013

Methanol System Rev: A Date: 02/10/2007

Commissioning Procedure Page: 1 of 30

Reviewed & Approved Date

Originator ND Pickard 02/10/2007

Approver J Mills

Other (As Required)

Revision Record

Revision Description Date By Checked Approved

A Issued for review NDP JM 09/10/2007

Chevron Transportation BV

Document Title: Methanol System

Project Name: A12 CPP

Commissioning Procedure

CEPN-AB-1A-09-P-900013




Table of Content

1.0 Introduction .................................................................................................................. 3 2.0 System Description ...................................................................................................... 4 3.0 Hazard Analysis ........................................................................................................... 5 4.0 Pre-Requisites & Temporary equipment ........................................................................ 7

4.1 Pre-Requisites .......................................................................................................... 7 4.2 Temporary Equipment/ First Fills/ Commissioning Spares ........................................... 7

5.0 Discipline Commissioning ............................................................................................. 8 5.1 Instrument Checks .................................................................................................... 8 5.2 Equipment Installation Checks ................................................................................... 9

5.2.1 PSV-95207........................................................................................................ 10 5.2.2 PSV-95208........................................................................................................ 11 5.2.3 LT-95202 .......................................................................................................... 12 5.2.4 LS-95211 .......................................................................................................... 14 5.2.5 ESDV-95201 ..................................................................................................... 15 5.2.6 ESDV-95204 ..................................................................................................... 16

5.3 Electrical Checks ..................................................................................................... 17 5.3.1 General ............................................................................................................. 17 5.3.2 PM-9410A Methanol Pump Motor ....................................................................... 18 5.3.3 PM-9410B Methanol Pump Motor ....................................................................... 19

5.4 Mechanical Checks ................................................................................................. 20 5.4.1 Methanol Injection Skid Q-9534 ......................................................................... 21 5.4.2 PM-9410A, Methanol Injection Pump.................................................................. 22 5.4.3 PM-9410B, Methanol Injection Pump.................................................................. 23

6.0 Dynamic Commissioning ............................................................................................ 24 6.1 General ................................................................................................................... 24 6.2 System Preparation ................................................................................................. 25 6.3 Methanol Skid Q-9534 Function Checks ................................................................... 26

7.0 Reference Documents ................................................................................................ 29 8.0 Appendix .................................................................................................................... 30

CEPN-AB-1A-09-P-900013




1.0 INTRODUCTION The Chevron A/12-CPP (Central Processing Platform) is a normally manned offshore installation. The platform has facilities for up to 12 gas production wells. Depending on well pressure, the production wells are designated as LP or HP & are routed to either the HP or LP production manifolds. The well fluids are then separated and the gas routed to the export compressor. LP wells are routed to the booster compressor which raises the gas pressure to circa 35 barg. The gas is routed to the HP system and subsequently the 1st stage export compressor suction. The export compressor has 2 stages and compresses the gas to 125 barg for export. Downstream of the export gas compressor the gas is passed through the tri -ethylene glycol (TEG) contactor resulting in a dew point of -8ºC. The gas is then routed to the export header which includes a fiscal metering system prior to export into the 16” riser and pipeline. The export line ties in at the B/10 tie in point on the A6-F3 pipeline. Any liquids recovered in the separators (expected to be water not condensate) is likely to contain sand. The liquid and sand is sent to a de-sanding package that consists of a hydro-cyclone and sand accumulator. The sand is separated and ultimately removed from the platform in tote tanks. The liquid is routed to the produced water degasser. Liquids dropping out in the vent header, compressor suction scrubbers, TEG contactor bottom de-sanding package, fuel gas treatment and export compressor fuel gas filter are routed directly to the produced water degasser. The produced water degasser is common to the LP and HP vent headers and allows gas vapours to be released to the LP vent stack. The produced water is treated in the produced water skimming tank where the water is disposed of overboard. Any condensate recovered is skimmed from the water, collected and ultimately removed from the platform by tote tank. This procedure details the steps to be taken to commission the Methanol system.

CEPN-AB-1A-09-P-900013




2.0 SYSTEM DESCRIPTION 2.1.1 Methanol System Methanol is used as a hydrate-inhibitor during start-up to the Wellheads and also to upstream of the export compressor station recycle valve. The Methanol system comprises a Storage Tank T-9613 with an isolation valve ESDV-95204 supplying two electrically driven variable stroke injection pumps P-9410A/B with pipework connecting to a manifold where ½” tubing is routed to an injection ring upstream of each wellhead choke valve. Storage Tank T-9613 is filled via ESDV-95201 locally from methanol storage drums located on the main deck.

Wellhead Injection: During start-up, the gas in the Well can be cold, with low temperatures occurring across the Production Choke Valves (JT effect) where hydrates may form. To prevent the forming of hydrate, Methanol can be injected on the Instrument Ring, between the Wing and Choke via one of the positive displacement Methanol Well Pumps. Overpressure is protected on the outlet of each Pump utilising dedicated Pressure Relief Valves with relief pressure to return the Methanol back to the Storage Tank T-9613. Each of the two methanol injection pumps can be manually started and stopped from the PCS. Injection pump P-9410A is primarily lined up to inject methanol to the wellhead chokes. Injection pump P-9410B is primarily lined up to inject methanol to upstream of the station recycle valve for the export compressor. There is a cross-over valve that enables each pump to supply methanol to either of the consumer routes.

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3.0 HAZARD ANALYSIS All work shall be carried out in accordance with the requirements as defined by Noble drilling Safe System of Work (SSOW) when the drilling rig is along side. Any commissioning activities that are conducted once the drilling rig has left shall be carried out in accordance with Chevron Exploration and Production Netherlands requirements. All commissioning personnel shall be fully conversant with the Permit To Work System in operation for this project. The purpose of the PTW is to ensure that a safe and controlled environment is provided to safely carry out all commissioning tasks. The PTW has the following features: - It reduces the potential effects of the action of the persons doing the work, by specifying safety precautions and setting limits of duration and extent of work. It allows those responsible for overall site safety to be aware of all the various activities being performed and allows priorities to be set for conflicting tasks. It encourages formal and careful attention to a safe system of working by requiring a signature from specific individuals. It encourages those responsible for overall site safety to plan and carry out tasks so that minimal inconvenience and interference is caused to other tasks. Before starting any of the activities described in this document, it is the responsibility of the persons performing the work to: - Familiarise themselves with the plant and equipment being worked on. Read this procedure; understand its requirement and the need to perform tests detailed within the document. Read the Vendor documentation supplied with the plant / equipment being commissioned. Observe any special requirements and / or limitations recommended by Vendors. Always be in possession of a valid Permit to Work for the equipment to be commissioned. Ensure that non-involved personnel are not within the working area. Use barriers to exclude them from hazardous and critical areas, such limitations shall be detailed on the Permit To Work.

Where necessary maintain radio contact between essential personnel.

The Lead Commissioning Engineer for this system is the single point of contact for each task.

Do not leave plant / equipment unattended during initial commissioning.

Ensure that equipment / plant being commissioned is barriered off and is clearly marked with labels indicating that the equipment / plant is currently “ LIVE AND/OR UNDER PRESSURE” and / or “COMMISSIONING IN PROGRESS – SYSTEM UNDER PRESSURE”. Material Safety Data Sheets giving details of all hazardous substances must be read and all instructions strictly adhered to. Care of Substances Hazardous to Health assessments shall be provided by the Project Health and Safety Dept.

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Hazards associated with this system are as follows:

Hazard Risk System Mitigation

PRESSURIZED

FLUIDS

Projectiles due to pressure leaks.

Pressurised lube oil pipework

Safety glasses shall be worn at all times. Ensure that pipework is isolated, depressurised and vents are opened prior to breaking containment. Always ensure that a permit has been issued and ensure all process isolations are suitable

ELECTRICAL SHOCK

Electric shock Live electrical circuits All work on electrical systems is to be done using Chevron/ Nobel PTW and electrical isolation procedure

FLAMMABLE SUBSTANCES

Fire Lubrication oil

Local fire fighting equipment to be in place before commissioning commences. Use portable gas detection where necessary

The above hazard analysis is not in place of a risk assessment. Always complete a full risk assessment prior to starting any activity outlined in this procedure.

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4.0 PRE-REQUISITES & TEMPORARY EQUIPMENT 4.1 Pre-Requisites The following items and supporting systems are required to be complete and available for use prior to dynamic commissioning of the produced water system.

System No. Description Sign / Date

Instrument air distribution and air available

PCS

ESD

Fire & Gas system

LV Switchboard E-9101

4.2 Temporary Equipment/ First Fills/ Commissioning Spares The following temporary equipment and first fills are required for commissioning of this system

Temporary Equipment / First Fills/ Commissioning Spares Qty/ Vol

Methanol (Already part filled, for info only) 1000 litres

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5.0 DISCIPLINE COMMISSIONING 5.1 Instrument Checks

Description Sign / Date

Confirm that the system is mechanically complete and MC handover from construction to commissioning has been achieved.

Confirm that there are no “A” punch list items outstanding, and Commissioning verification has been signed off for all witness hold-points.

Any activities with electrical interface, e.g. motor controls shall be performed in conjunction with the Electrical Department. Following each check the relevant instruments and systems shall be reinstated ready for operation. Ranges and set points are detailed in the following sections within this document . – in the event of range, alarm or set point discrepancy, the master document for reference shall be the RATS and associated Vendor documentation.

The following pages detail checks to be conducted for each of the tagged items as listed. These tasks shall be verified as complete prior to any dynamic commissioning commencing. If a completed HEEREMA pre-commissioning check sheet is available that covers all or a number of the checks identified for each tagged item then it is acceptable to use that project specific check document and sign off the applicable check boxes against tagged item checks, a copy of the applicable HEEREMA check sheet shall be attached to the relevant section of the commissioning procedure. Any remaining uncompleted check boxes against a tagged item must have those outstanding checks completed. *NOTE: IT IS THE RESPONSIBILITY OF THE COMMISSIONING ENGINEER TO ENSURE ALL EQUIPMENT FUNCTIONS CORRECTLY IN ACCORDANCE TO THE APPROVED DESIGN.

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5.2 Equipment Installation Checks Confirm the following NRV’s, local indicators and Flow Orifice devices are installed in accordance with the P&ID/Schematic Drawing & Instrument Hook Up Diagram and are installed in the correct orientation (as applicable). Check that the device is accessible for maintenance and functions correctly:

Tag No. Description. Range. Mounting. Initials Date

LG-95203 Level gauge on Methanol tank T-9613

PI-95205 Pressure indicator downstream of methanol pump P9410A

PI-95206 Pressure indicator downstream of methanol pump P9410B

- Non return valve downstream of methanol pump P9410A

- Non return valve downstream of methanol pump P9410B

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5.2.1 PSV-95207

Instrument Check – PSV

Tag: PSV-95207 Tag Description: METHANOL RELIEF - PRESSURE SAFETY VALVE

Item Check Description Initials Date

1 Check that preservation, transportation ties and bracing is removed (as applicable)

2

Confirm that PSV is installed in accordance with the P&ID & Isometric Drawing (as applicable). Check PSV is installed in the correct orientation. Check that the PSV and ancillaries are accessible for maintenance.

3 Confirm that the valve is correctly and clearly labelled. Confirm data plate and tag details are in accordance with as-built drawings.

4 Verify the PSV is certified and tagged correctly.

5

Verify the PSV set pressure is clearly labelled and in accordance with the PSV Data Sheet. Verify the PSV calibration is current and recertification is not required. NOTE: PSV Set Pressure 135 barg.

FUNCTIONAL CHECKS Initials Date

N/A There are no functional checks associated with this device. N/A N/A

Comments

CEPN-AB-1A-09-P-900013




5.2.2 PSV-95208

Instrument Check – PSV

Tag: PSV-95208 Tag Description: METHANOL RELIEF - PRESSURE SAFETY VALVE


1 Check that preservation, transportation ties and bracing is removed (as applicable)

2

Confirm that PSV is installed in accordance with the P&ID & Isometric Drawing (as applicable). Check PSV is installed in the correct orientation. Check that the PSV and ancillaries are accessible for maintenance.

3 Confirm that the valve is correctly and clearly labelled. Confirm data plate and tag details are in accordance with as-built drawings.

4 Verify the PSV is certified and tagged correctly.

5

Verify the PSV set pressure is clearly labelled and in accordance with the PSV Data Sheet. Verify the PSV calibration is current and recertification is not required. NOTE: PSV Set Pressure 135 barg.


N/A There are no functional checks associated with this device. N/A N/A

Comments

CEPN-AB-1A-09-P-900013




5.2.3 LT-95202

Instrument Loop Check – Level Transmitter

Tag: LT-95202 + LI-95202B Tag Description: METHANOL TANK LEVEL TRANSMITTER


1

Confirm that equipment is installed in accordance with the P&ID & Instrument Hook Up Diagram (as applicable). Check that the instrument is accessible for maintenance and that preservation, transportation ties and bracing is removed (as applicable)

2 Confirm that the instrument is correctly and clearly labelled. Confirm data plate and tag details are in accordance with the Solar documentation.

3 For I.S. circuits confirm the installation is in accordance with loop diagram(s) and vendor data sheet

4 Confirm that the equipment ATEX certification is in accordance with / is suitable for the area classification

5 Power-up the instrument & confirm the engineering units, zero and full scale values are in accordance with the vendor documentation

6 Simulate loop fault by causing an open circuit – check that fault condition is correctly indicated at PCS.

7

Function test the instrument in the field using calibrated and traceable test equipment / field communicator (as applicable) – use actual process fluid where possible. Confirm correct display, tag number and descriptors at UCP. Verify local indication at the field transmitter if applicable.

CALIBRATION CHECKS

FUNCTION PCS Signal Type 4 – 20 mA Analogue Input

Cal Range: 0 – 1600 Cal Units: mm

Operating Scale: 0 to 1600 Engineering Units: Mm

CHECK ZERO, SPAN & ALARMS AT PCS/ESD/UCP

Mm % mA Actual mm

Actual mA

LI-95202B mm

Alarm Initials Date

0 0 4.0

400 25 8.0

800 50 12.0

1200 75 16.0

1600 100 20.0

1400 87.5 18.0 LAH-95202

150 9.4 5.5 LAL-95202

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Comments

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5.2.4 LS-95211

Instrument Loop Check – Level Switch

Tag: LS-95211 Tag Description: METHANOL TANK LEVEL SWITCH


1

Confirm that equipment is installed in accordance with the P&ID & Instrument Hook Up Diagram (as applicable). Check that the instrument is accessible for maintenance and that preservation, transportation ties and bracing is removed (as applicable)

2 Confirm that the instrument is correctly and clearly labelled. Confirm data plate and tag details are in accordance with vendor documentation.



5 Simulate loop fault by causing an open circuit – check that fault condition is correctly indicated at PCS.

6

Function test the instrument in the field using suitable test equipment. Confirm correct display, tag number and descriptors at PCS. NOTE: Switch set-point = 1525mm rising (LAHH-95211). Confirm switch reset level = mm


Comments

CEPN-AB-1A-09-P-900013




5.2.5 ESDV-95201

Instrument Loop Check – ESD Valve

Tag: ESDV-95201 Tag Description: METHANOL SUPPLY TO TANK T-9613 ESD VALVE


1 Check ESD valve is installed in accordance to design documentation and is accessible for maintenance. Confirm all temporary preservation has been removed.

2 Confirm ESD valve is correctly and clearly labelled. Confirm data plate and tag details are in accordance with as-built drawings and the Ranges, Alarm & Trip Schedule List (RATS)



5

Function test the ESD valve in the field and from the ESD system using calibrated and traceable test equipment / field communicator (as applicable) - confirm correct display, alarms, tag number and descriptors at PCS/ESD. Complete calibration checks below:

FUNCTION CHECKS

ESDV-95201 ESD Signal Type Digital Output

ESD Valve Command

Local Position

Screen Indication

Stroke time secs Design

Stroke time secs Actual

Initials Date

Open

Close

Open

Close

6

With ESDV-95201 open, initiate a level 3 ESD, confirm the valve closes. With an active ESD, attempt to open ESDV-95201, confirm it is not possible to open the valve.

7

With ESDV-95201 open, simulate High High level at LS-95211, confirm the valve closes. With an active High High level, attempt to open ESDV-95201, confirm it is not possible to open the valve. Reduce level to below the high level trip point, confirm valve automatically opens.

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5.2.6 ESDV-95204

Instrument Loop Check – ESD Valve

Tag: ESDV-95204 Tag Description: METHANOL SUPPLY FROM TANK T-9613 ESD VALVE


1 Check ESD valve is installed in accordance to design documentation and is accessible for maintenance. Confirm all temporary preservation has been removed.

2 Confirm ESD valve is correctly and clearly labelled. Confirm data plate and tag details are in accordance with as-built drawings and the Ranges, Alarm & Trip Schedule List (RATS)



5

Function test the ESD valve in the field and from the ESD system using calibrated and traceable test equipment / field communicator (as applicable) - confirm correct display, alarms, tag number and descriptors at PCS/ESD. Complete calibration checks below:

FUNCTION CHECKS

ESDV-95204 ESD Signal Type Digital Output

ESD Valve Command

Local Position

Screen Indication

Stroke time secs Design

Stroke time secs Actual

Initials Date

Open

Close

Open

Close

6

With ESDV-95204 open, initiate a level 3 ESD, confirm the valve closes. With an active ESD, attempt to open ESDV-95204, confirm it is not possible to open the valve.

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5.3 Electrical Checks 5.3.1 General


Check that no category A punchlist items are outstanding.

Confirm that all electrical equipment is locked out prior to commencing any pre-commissioning checks.

Ensure that all electrical equipment is insured in accordance with the manufacturer’s recommendations and ATEX regulations.

Ensure that any Vendor’s pre-connection checks have been completed for supply to be made available to the package items.

Ensure that a livening-up notice has been issued and that all personnel are aware that all future work on any item in the package shall require an Electrical Permit to Work or Sanction for Test. Affix notices to the package to this effect,

Carry out insulation and continuity tests on the cables to the package items.

Verify that MCC E-9101 is energised

The following pages detail checks to be conducted for each of the tagged items as listed. These tasks shall be verified as complete prior to any dynamic commissioning commencing. If a Heerema project specific pre-commissioning check sheet is available that covers all of the checks identified for each tagged item then it is acceptable to use the project specific check document.

Electrical equipment items to be verified under this section of the commissioning procedure: MCC E-9101 Cub.12L Methanol Pump PM-9410A. MCC E-9101 Cub.12M Methanol Pump PM-9410B.

Comments:

CEPN-AB-1A-09-P-900013




5.3.2 PM-9410A Methanol Pump Motor

Electric Motor

Tag: PM-9410A Description: Methanol Pump

Item Description Initials Date

1 Preservation, transportation ties and bracing removed. Check equipment is clean and undamaged

2 Construction checklist completed and no outstanding 'A' punch items

3 Check motor & maintenance switch tags/labels are fitted & correct.

4

Check equipment data plate and ensure ATEX certification is appropriate for the hazardous area. Record data plate details in the comments box below.

5 Confirm MCB / Fuse rating are correct to latest design drawings

6 Confirm motor management / protection, relays are configured correctly and settings are as per latest design schedule

7 Test and record motor insulation resistance

8

Confirm point to point test of motor feeder

9 Confirm correct operation of the Local control station HS-9410A to the MCC cubicle.

10 Start motor and confirm direction of rotation

11 Confirm and record run-up time and starting current

12

With methanol pump set up to return to tank with temporary fittings, carry out no-load run for a min period of 30mins or until temperature readings stabilise. Monitor and record results. Running Current: A Temp.: degC

13

With methanol pump set up to pressurise system, carry out load run. Record results – see section 6.3. Running Current: A Temp.: degC

14 Ensure ‘As Built’ documentation is complete

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5.3.3 PM-9410B Methanol Pump Motor

Electric Motor

Tag: PM-9410B Description: Methanol Pump


1 Preservation, transportation ties and bracing removed. Check equipment is clean and undamaged

2 Construction checklist completed and no outstanding 'A' punch items

3 Check motor & maintenance switch tags/labels are fitted & correct.

4

Check equipment data plate and ensure ATEX certification is appropriate for the hazardous area. Record data plate details in the comments box below.

5 Confirm MCB / Fuse rating are correct to latest design drawings

6 Confirm motor management / protection, relays are configured correctly and settings are as per latest design schedule

7 Test and record motor insulation resistance

8

Confirm point to point test of motor feeder

9 Confirm correct operation of the Local control station HS-9410B to the MCC cubicle.

10 Start motor and confirm direction of rotation

11 Confirm and record run-up time and starting current

12

With methanol pump set up to return to tank with temporary fittings, carry out no-load run for a min period of 30mins or until temperature readings stabilise. Monitor and record results. Running Current: A Temp.: degC

13

With methanol pump set up to pressurise system, carry out load run. Record results – see section 6.3. Running Current: A Temp.: degC

14 Ensure ‘As Built’ documentation is complete

Commissioning Verification

This is to confirm that all Electrical checks associated with Methanol Skid Q-9534 function in accordance with the design and no Category A Punch Items remain. Contractor Representative Name Sign Dat e Company Representative Name Sign Date

CEPN-AB-1A-09-P-900013




5.4 Mechanical Checks


Confirm that the system is mechanically complete and MC handover from construction to commissioning has been achieved.

Confirm that there are no “A” punch list items outstanding, and Commissioning verification has been signed off for all witness hold-points.

The following pages detail checks to be conducted for each of the tagged items as listed. These tasks shall be verified as complete prior to any dynamic commissioning commencing. If a completed HEEREMA project specific pre-commissioning check sheet is available that covers all or a number of the checks identified for each tagged item then it is acceptable to use that project specific check document and sign off the applicable check boxes against tagged item checks, a copy of the applicable HEEREMA check sheet shall be attached to the relevant section of the commissioning procedure. Any remaining uncompleted check boxes against a tagged item must have those outstanding checks completed.

Mechanical equipment items to be verified under this section of the commissioning procedure: Operability and installation of Methanol Pumps, Methanol valves, instrument isolation valves, pulsation dampers and associated pipework.

Comments:

CEPN-AB-1A-09-P-900013




5.4.1 Methanol Injection Skid Q-9534

Vendor Equipment

Tag: Q-9534 Description: Methanol Injection Skid


1 Ensure all leak testing, flushing and chemical cleaning is complete

2 Ensure all flanges have been torqued/ tensioned as appropriate and that a valid joint completion tag is fitted

3 Construction checklist completed and no outstanding ‘A’ punch items

4 Confirm equipment is installed in accordance with P&IDs

5 Data plate and tag details in accordance with as-built drawing and P&ID (where applicable)

6 All associated valves are accessible, operate correctly and are free from damage – list defects in comments section below.

7 Confirm all three spades are installed in the open position.

8 Flow coding and direction of flow is correct and attached to pipework

9 Confirm all vents and drains are complete and any blind flanges are installed where necessary.

10 Confirm non-return valves on pump outlet lines are installed correctly.

11 Tank internally clean and all internals installed in accordance with drawing

12 Tank fill connection and spectacle spade in place in the open position.

13 Tank vent installed and in accordance with drawing

14 Manway closed with correct gaskets and bolting.

15 Earth bonding completed

Commissioning Verification This is to confirm that all Mechanical checks associated with the Methanol Skid function in accordance with the design and no Category A Punch Items remain. Contractor Representative Name Sign Date Company Representative Name Sign Date

CEPN-AB-1A-09-P-900013




5.4.2 PM-9410A, Methanol Injection Pump

Pump

Tag: PM-9410A Description: Methanol pump


1 Preservation, transportation ties and bracing removed

2 Equipment in accordance with P&ID

3 Suction strainer installed.

4 Data plate and tag details in accordance with as-built drawing and P&ID

5 Flushing screens, temporary filters, spades and plugs removed – as applicable

6 Confirm pump discharge is protected from overpressure – see PSV-95207

7 Confirm all piping/ equipment is supported correctly

Comments

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5.4.3 PM-9410B, Methanol Injection Pump

Pump

Tag: PM-9410B Description: Methanol pump


1 Preservation, transportation ties and bracing removed

2 Equipment in accordance with P&ID

3 Suction strainer installed.

4 Data plate and tag details in accordance with as-built drawing and P&ID

5 Flushing screens, temporary filters, spades and plugs removed – as applicable

6 Confirm pump discharge is protected from overpressure – see PSV-95208

7 Confirm all piping/ equipment is supported correctly

Comments


This is to confirm that all Mechanical checks associated with the Methanol Skid function in accordance with the design and no Category A Punch Items remain. Contractor Representative Name Sign Date Company Representative Name Sign Date

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6.0 DYNAMIC COMMISSIONING 6.1 General Item Description Initials Date

1

Ensure punch list does not include any category A items relating to this system.

2 Check red lined P&ID’s and diagrams received during hand over and assess any impact on the commissioning procedure

3 Verify that all site queries or site instructions associated with this system have been cleared / completed.

4

DISCIPLINE COMMISSIONING VERIFICATION

Verify that all discipline commissioning in Section 5 of this document is complete.

Instruments

Electrical

Mechanical

5

Comments:

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6.2 System Preparation Item Description Initials Date

1 Ensure System Livening Up Notices (LUNs) have been issued, distributed and attached to this procedure

2

All work will be carried out in accordance with the platform Permit To Work System Ensure Risk and COSHH Assesments are available, safety barriers are in place during all running tests, venting etc. Confirm toolbox talks to be performed before all tasks and logged in accordance with platform procedures.

3 All instrument isolation valves are open and instrument signals are available to the PCS & ESD systems

4 All electrical power, instrument air & nitrogen are available – as applicable

5 All manual drains, bleed & vent valves are closed

6

All spec blinds are in the open position (unless specifically required otherwise for start of commissioning). Ensure all system boundary isolations are in place.

7

Prior to operating any Methanol pumps, ensure suitable portable fire protection equipment is available . Regular monitoring of any Methanol pressure build-up is necessary.

8 Ensure suitable PPE is worn by all personnel who may become in contact with Methanol.

9

10

Comments:

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6.3 Methanol Skid Q-9534 Function Checks Item Description Initials Date

1

The purpose of this section is to verify the correct functioning of the Methanol injection pumps package. The pumps injection rates are checked by simulating at maximum operating pressure. This will be achieved by routing the flow through temporary restriction valves and hoses connected to one of the spare outlets on the methanol manifold and measuring a known volume over a measured time.

2

Ensure the following valves are in the closed position:

1” ball valve on Methanol supply line 1”-MN-95573-1S

ESDV-95201

2 x ½” vent and drain valves for LG-95203

1½” drain valve

2” ball valve

½” ball valve between pump discharge lines

All ½” ball valves on the methanol outlet manifold.

3

Ensure the following valves are in the open position:

2 x 2” isolation valves for LG-95203

ESDV-95204

2 x ½” isolation valves - methanol injection pumps suction lines

½” isolation valve PI-95205

½” isolation valve PI-95206

2 x ½” isolation valves – methanol injection pumps discharge lines

2 x ½” block / bleed valves – methanol injection pumps discharge lines

4

Connected a suitable temporary hose to a restriction / metering valve that in turn is connected to one of the pump discharge manifold valves. Route the hose to a suitable container that will enable the volume of methanol to be calculated over a timed period to establish pump performance.

5 Confirm sufficient methanol in storage tank T-9613. Set pump P-9410A to minimum stroke.

6

At the MCC, liven up power to Methanol pump P-9410A. Switch local pump isolator to ‘on’. At the PCS select P-9410A to ‘Start’. Confirm pumps P-9410A starts. Monitor pump discharge pressure at local indicator PI-95205.

7

Adjust restrictor / metering valve to enable a pressure build-up of circa 120 barg. Note it is important not to lift pressure relief valve PSV-95207 (135 barg). Run pump for 1 minute at different stroke settings and measure volume of methanol in drum after each action. Calculate this meets the design capacity as shown on the pump curve. If performance data from an FAT is available demonstrate at 100% stroke only. Note values in table below

8 Stroke Design Actual Flow Discharge Power

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% Flow Lts/hr Lts/hr pressure barg Kw

0

25

50

75

100

9 Confirm Pulsation damper N2 pre-charge pressure: Design: barg, Actual: barg

10

Simulate High High methanol level LAHH-95211 in storage tank T-9613 at LS-95211 and confirm methanol injection pump P-9410A stops.

11 Empty Methanol from drum back into the Methanol Storage Tank T-9613.

12 Confirm sufficient methanol in storage tank T-9613. Set pump P-9410B to minimum stroke.

13

At the MCC, liven up power to Methanol pump P-9410B. Switch local pump isolator to ‘on’. At the PCS select P-9410B to ‘Start’. Confirm pumps P-9410B starts. Monitor pump discharge pressure at local indicator PI-95206.

14

Adjust restrictor / metering valve to enable a pressure build-up of circa 120 barg. Note it is important not to lift pressure relief valve PSV-95208 (135 barg). Run pump for 1 minute at different stroke settings and measure volume of methanol in drum after each action. Calculate this meets the design capacity as shown on the pump curve. If performance data from an FAT is available demonstrate at 100% stroke only. Note values in table below

15

Stroke %

Design Flow Lts/hr

Actual Flow Lts/hr

Discharge pressure barg

Power Kw

0

25

50

75

100

16 Confirm Pulsation damper N2 pre-charge pressure: Design: barg, Actual: barg

17

Simulate High High methanol level LAHH-95211 in storage tank T-9613 at LS-95211 and confirm methanol injection pump P-9410B stops.

18 Empty Methanol from drum back into the Methanol Storage Tank T-9613.

19

With both methanol pumps stopped, isolate ½” isolation valves on each of the pump discharge lines. Remove the temporary restriction valve and hose. Install blind in the outlet valve on the methanol discharge manifold.

CEPN-AB-1A-09-P-900013




Comments:


This is to confirm that all Mechanical checks associated with the Methanol Skid function in accordance with the design and no Category A Punch Items remain. Contractor Representative Name Sign Date Company Representative Name Sign Date

CEPN-AB-1A-09-P-900013




7.0 REFERENCE DOCUMENTS The following documents are to be referred to while performing the commissioning activities detailed in this procedure:

Title Doc. Number

P&ID Methanol Storage Tank A/12-CPP-A-90052 rev C3

P&ID Typical Wellhead A/12-CPP-A-90025 rev C3

RANGES, ALARM & TRIP SETTING LIST (RATS) A/12-CPP-A-90399

ESD Cause and Effect Diagrams (Process and Utilities) A/12-CPP-J-92060 rev Z2

CEPN-AB-1A-09-P-900013




8.0 APPENDIX

Document Number: CEPN-AB-1A-09-P-900013

Documents

Transcript of Document Number: CEPN-AB-1A-09-P-900013