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Doc. Ref.: MM-YAD-00-DORI-434500

CTR Reference:NA

Revision: 01 Rev Date:19-Dec-2011Specification for ESV / SDV

Protections Enclosures on PP, WP1and WP2 Platforms

Discipline:PVV Document Type:SPE

Phase: FE System / Subsystem:03 Equipment Type:XE Status:AFD Class:1 Page2of 28

This document is the property of TOTAL E&P MYANMAR. It must not be stored, reproduced or disclosed to others without written authorisation from the Company.

R:\652301\Typing\DOCS\NATIVE\DOCS\43-Piping (new)\MM-YAD-00-DORI-434500_rev01.doc

TABLE OF CONTENT

1 Introduction.................................................................................................................................... 3

1.1 Purpose.............................................................................................................................. 3

1.2 General description of actuated On/Off Valves ................................................................. 3

1.3 Context............................................................................................................................... 5

2 Reference Documents................................................................................................................... 7

3 Definitions and abbreviations ...................................................................................................... 7

4 General ........................................................................................................................................... 7

4.1

Omissions .......................................................................................................................... 8

4.2 VENDOR selection ............................................................................................................ 8

4.3 Responsibility matrix.......................................................................................................... 8

5 ESV / SDV Protection Enclosures requirements........................................................................ 9

5.1 General description of Protection Enclosures.................................................................... 9

5.2 Environmental conditions................................................................................................. 10

5.2.1 Air characteristics................................................................................................................................................10

5.2.2 Seawater properties............................................................................................................................................ 10

5.3 Strength............................................................................................................................ 10

5.4

Fire rating......................................................................................................................... 10

5.5 Ventilation ........................................................................................................................ 10

5.6 Fixing arrangement .......................................................................................................... 11

5.7 Easiness of installation ....................................................................................................11

5.8 Accessibility for inspection............................................................................................... 11

5.9 Corrosion.......................................................................................................................... 11

5.10 Earthing system ............................................................................................................... 11

5.11 Design life ........................................................................................................................ 11

6 Scope of work .............................................................................................................................. 12

6.1

Survey, Engineering and Design ..................................................................................... 12

6.2 Supply of Protection Enclosures..................................................................................... 12

6.3 Test assembly..................................................................................................................12

6.4 Site work and installation ................................................................................................. 12

6.5 Documentation................................................................................................................. 13

7 PP ESV / SDV to be protected .................................................................................................... 14

8 WP1 ESV / SDV to be protected ................................................................................................. 19

9 WP2 ESV to be protected............................................................................................................ 23

10

PP Electrical cable and OTU to be protected ........................................................................... 25

11 WP2 Electrical cable to be protected......................................................................................... 27

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Introduction

1.1 Purpose

The purpose of this specification is to provide the minimum technical requirements for the design,construction and assembly of ESV / SDV Protection Enclosures against wave impact on PP, WP1 and WP2platforms, in the frame of YADANA brownfield modifications. The specified Protections Enclosures consist oflocal composite boxes surrounding each valve and its associated actuator.

This specification is also applicable for the protection of :

- existing 6.6 kV electrical cable between J-Tube splitter box and Main Deck on WP2 platform,- existing 6.6 kV electrical cable between J-Tube splitter box and Lower Deck on PP platform,

- existing OTU for optical fibres located above J-Tube on PP platform,

It is highlighted that ESV / SDV Protection Enclosures shall be extended to protect instruments, valves andall relevant tubings located in the vicinity of ESV and SDV.

1.2 General description of actuated On/Off Valves

Twelve different SDV and ESV are located on PP Drain Deck and WP1 / WP2 Cellar Decks. These valvesprovide the ultimate hydrocarbon inventory isolation from the risers in case of shutdown.

The valves are ranging from 10" to 36" nominal diameters (and one 4 by-pass) with a pressure range from900 Lbs to 1500 Lbs and are fitted with single acting, spring return, piston hydraulic actuators.

The control of the valve is performed through a local control panel, including the pneumatic and hydraulicdevices necessary for the valve operation. The air is used for the pilot circuits which is triggered by solenoidvalves connected to the platform safety system. The hydraulic fluid is used as a motive power for the valveactuators.

The local panels receive an air supply from the platform instrument air network. The hydraulic power issupplied by the HPU. A hydraulic return circuit to the HPU is also needed from each local control panel. Theinterface signals between the local control panels and the platform safety are made through electrical cables.

Three hydraulic tubings are connecting the valve local control panels to the valve actuators. One for thepiston movement and two for the partial stroking facility requiring a cam operated valve mounted on the

actuator.Actuators are also receiving electrical cables for the valve limit switches connection to the safety system.

These principles are illustrated in the Figure 1-1 hereafter.

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Figure 1-1: Actuated on/off valve principle

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Picture 1-1 : WP1 Cellar Deck - ESV 10012 on 20 gas line with associated control panel

1.3 Context

Under 6m subsidence scenario, ESV / SDV located at Drain Deck of PP Platform and Cellar Deck of WP1and WP2 platforms will be located in the splash zone and impacted by extreme waves. The twelve ESV /SDV listed in Table 1-1 hereunder shall be protected. Existing control panels will be removed andreplaced by new panels installed at Lower Deck, and associated tubing will be rerouted.

Some ESV / SDV already include blanket PFP which will have to be removed prior installation of newenclosures.

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Platform ESV / SDV Location Line NoPIDRef.

Deck elevation

ESV 40267 Drain Deck - 36 export gas line 36-HC-2040-0-PG01S [3] +16.822 m LAT

ESV 40137 Drain Deck - 36 export gas line 36-HC-2040-0-PG01S [3] +16.822 m LAT

SDV 40266 Drain Deck - 20 gas line from WP2 20-HC-2003-0-PH03S [2] +16.822 m LAT

ESV 40021 Drain Deck - 20 gas line from WP2 20-HC-2003-0-PH03S [2] +16.822 m LAT

ESV 40268 Drain Deck - 20 domestic line 20-HC-2049-0-PG01S [4] +16.822 m LAT

PP

ESV 40157 Drain Deck - 20 domestic line 20-HC-2049-0-PG01S [4] +16.822 m LAT

ESV 10012 Cellar Deck - 20 gas line 20-HC-0122-0-H48 [5] +17.058 m LAT

SDV 10601 Cellar Deck - 20 gas line 20-HC-0122-0-H48 [5] +17.058 m LAT

ESV 10951 Cellar Deck - 10 line from WP3 10-HC-0132-0-PH06N [6] +17.058 m LAT

SDV 10952 A Cellar Deck - 10 line from WP3 10-HC-0132-0-PH06N [6] +17.058 m LAT

WP1

SDV 10952 B Cellar Deck - 4 By-pass line 4-HC-0150-0-H48 [6] +17.058 m LAT

WP2 ESV 20039 Cellar Deck 20 gas line 20-HC-0233-0-PH03S [7] +17.061 m LAT

Table 1-1 List of ESV / SDV to be protected against wave impact

According to the metocean report ref. [1], the maximum wave crest elevation of the Most Probable extremewave is +18.6m LAT. The magnitude of wave impact pressures is around 5 t/m

2.

ESV / SDV actuators and in particular the connection between valve and actuator are not designed to

withstand hydrodynamic pressures (drag loads and slamming effect) and shall be protected.

Following items shall also be protected form wave impact :

- existing 6.6 kV electrical cable between J-Tube splitter box and Main Deck on WP2 platform,

- existing 6.6 kV electrical cable between J-Tube splitter box and Lower Deck on PP platform,

- existing OTU for optical fibres located above J-Tube on PP platform,

It is highlighted that ESV / SDV Protection Enclosures shall be extended to protect instruments, valves andall relevant tubings located in the vicinity of ESV and SDV.

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2 Reference Documents

[1] DGEP/TDO/TEC/GEO/MOW10298 rev.1 Yadana Field Metocean Criteria

[2] PID-YAD3-PP-PR-3001 rev.M04 PP Inlet Manifold PID

[3] PID-YAD3-PP-PR-3007 rev.M04 PP Export Gas Pig Launcher PID

[4] PID-YAD3-PP-PR-3009 rev.M04A PP Domestic Gas Pig Launcher PID

[5] PID-YAD3-WP1-PR-0107 Rev.M04 WP1 Wellheads Manifolds PID

[6] PID-YAD3-WP1-PR-0110 Rev.M04 WP1 Pig Receiver PID

[7] PIP-YAD3-WP2-PR-0210 Rev.M04 WP2 Pig Launcher PID

[8] MM-YAD-50-DORI-439531 PP - Drain Deck - Plot Plan

[9] MM-YAD-40-DORI-439431 WP1 - Cellar Deck - Plot Plan

[10] MM-YAD-60-DORI-439631 WP2 - Cellar Deck - Plot Plan

[11] GS-EP-SAF-337 Passive fire protection: Basis of design

3 Definitions and abbreviations

In the present document Protection Enclosuremeans the complete protection system including compositepanels, structural supporting framing and fittings.

ATEX ATmosphere EXplosive

ESV Emergency Shutdown Valve

HPU Hydraulic Power Unit

LAT Lowest Astronomical Tide

OTU Optical Termination Unit

PFP Passive Fire Protection

PID Piping and Instrumentation Diagram

PP Production Platform

SDV Shutdown Valve

WP Wellhead Platform

4 General

CONTRACTOR shall be responsible for the technical integrity of the ESV / SDV protections, includingdesign, materials, manufacture, assembly, testing, performance, and specified ENGINEERING services and

for ensuring that the goods and services supplied meet all applicable regulations on health, safety and theenvironment.

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4.1 Omissions

Any omission in the requirements detailed herein shall not relieve CONTRACTOR of any responsibility todeliver a complete system delivering the specified performance.

4.2 VENDOR selection

VENDOR selection for ESV / SDV protections shall be carried out in accordance with the Project VENDORlist.

4.3 Responsibility matrix

Responsibilities of CONTRACTOR and VENDOR are presented in the table hereunder

CONTRACTOR VENDOR

Control panel relocation X

ESV / SDV tubing / cabling rerouting X

ESV / SDV enclosure 12 off Installation Fabrication

Splitter box / OTU enclosure 3 off Installation FabricationRemoval of existing PFP blankets X

Certification of enclosure design X

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5 ESV / SDV Protection Enclosures requirements

5.1 General description of Protection Enclosures

The solution to protect ESV / SDV valves and actuators from wave impact consists in installing compositeprotection enclosures with removable panels as presented in Picture 5-1 hereunder. The protectionenclosure shall incorporate ventilation details, lift-off panels, access hatch and pipe and instrumentationpenetrations. Lift off panels shall offer rapid and easy access to ESV / SDV inspection.

Picture 5-1 : Typical protection enclosure

The protection enclosures are made up of a steel support frame with composite panels attached (typically50mm thick). The steel supporting structure consists of posts bolted to Drain/Cellar Deck and Lower Deckmembers.

Protections shall be designed to fit closely around ESV / SDV and associated actuator. Connectionsbetween hydraulic tubings / electrical wires and the actuator shall be included within the protectionenclosure.

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5.2 Environmental conditions

The following environmental conditions shall be taken into account in the design of protection enclosures.

5.2.1 Air characteristics

MINIMUM MEAN MAXIMUM

Air Temperature 20.6 C 26.5 to 29.5 C 32.2 C

Relative Humidity 45.7 % 70 to 85 % 98.9 %

Table 5-1 Air characteristics

5.2.2 Seawater properties

MINIMUM MEAN MAXIMUM

Salinity 24.3 PSU 31.2 PSU 35.3 PSU

Table 5-2 Seawater properties

5.3 Strength

The protection shall resist to a wave impact pressure up to 50 kN/m2and blast pressure up to 0.3 barg.

It is pointed out that the lower part of protection enclosures shall be designed to withstand the waveslamming effect. The protection enclosure shall be particularly reliable as its failure could induce impact of acomposite panel on ESV / SDV under extreme storms and generate serious damage. Wave loads ontoprotection enclosures shall be transmitted to Cellar Deck and Lower structures. The protection enclosureshall be designed to avoid any relative displacement between valve and actuator.

A sufficient clearance between protected ESV / SDV and the protection enclosures shall be taken intoaccount to avoid any contact due to composite panel deflection under wave impact.

5.4 Fire rating

The fire rating of the protection enclosures shall be 200 / JF / 60(see ref. [7]).

Tubes and cables shall be routed to the actuator inside the enclosure through fire resistant openings onpanel split lines. The enclosure shall be designed to be dismantled without the need to disconnect actuator.

5.5 Ventilation

The protection enclosure shall provide natural ventilation through ventilation holes to avoid condensation andcorrosion issues on protected ESV / SDV. These holes shall close automatically in case of fire or shall beoutfitted with intumescent materials. Protection shall be outfitted with blast shielded grills promoting naturalventilation of the enclosure and providing suitable locations for use of gas detection devices.

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5.6 Fixing arrangement

The supporting structure of the protection enclosure shall be attached to Drain/Cellar Deck and Lower Deckmembers with bolts.

5.7 Easiness of installation

In order to minimize offshore works, easy and quick offshore installation is required.

Enclosure shall be fully dismountable and each element tagged.

5.8 Accessibility for inspection

As ESV / SDV shall remain accessible for inspection and maintenance, the protection shall be easily andquickly removable. The protection shall be outfitted with lift off panels offering rapid and easy access to valveand actuator.

Enclosure panels shall be designed to be handled without special machinery and shall be demountable forinspection and maintenance purposes without the need for special tools or specialist personnel.

5.9 Corrosion

The protection enclosure shall be corrosion resistant. Corrosion resistant nickel alloys shall be selected such

as Alloy 625 (UNS NO6625) or Alloy 725 (UNS N07725) for bolting. Stainless or galvanized steel materialshall be used for the supporting structure sections.

5.10 Earthing system

Enclosure support legs shall incorporate a steel earthing boss to satisfy ATEX requirements for use inhazardous zones.

Picture 5-2 : Typical steel earthing boss

5.11 Design life

The design life of the protection enclosure is 20 years.

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6 Scope of work

6.1 Survey, Engineering and Design

Point cloud from 3D laser scan of the valves and actuators area will be provided by COMPANY.

CONTRACTOR / VENDOR will conduct a survey of the valves and actuators in order to design protectionenclosure arrangement and ensure that each enclosure is designed to accommodate any nearby equipmentor structure. The enclosure shall be in particular designed to allow for penetration of piping / tubing andcables.

VENDOR shall produce a 3D model of enclosure for integration into overall CONTRACTOR 3D model.

CONTRACTOR shall ensure the overall integration of enclosures into the platforms including all interfaces

with structure, piping and cables.

CONTRACTOR shall issue engineering drawings to reflect fixing arrangements and interface details withsupporting steelwork. This design work will be based upon details that meet the wave loading requirementsand will result in a set of fabrication drawings. Design will comprise a number of standard panel sizes thatare bolted to steel members.

VENDOR shall produce and issue an installation manual and drawings for the protection panels covering theenclosure first installation and further phases when access to valves is required for inspection / maintenanceactivities.

6.2 Supply of Protection Enclosures

Protection enclosures will be manufactured to detailed engineering and design drawings produced and

approved as a result of the site survey.

The protection enclosures will be engineered to meet the requirements and performance criteria listed inprevious section. Enclosure overall design shall be certified by Certifying Authority including :

Structural design of enclosures certified by a third-party,

Fire and blast rated component including assembly details of a type which is fire-tested and certifiedby an independent, nationally accredited third party.

6.3 Test assembly

CONTRACTOR shall perform a test assembly of each Protection Enclosure at the VENDOR factory.

6.4 Site work and installation

CONTRACTOR shall arrange the following activities at site :

Engineering survey if required

Review and resolution of clashes and interface details

Preparation and agreement of Installation drawings

Supervision of the installation by local site personnel

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6.5 Documentation

VENDOR shall provide the following documentation as part of the scope of supply:

General Arrangements and Interface Drawings

Weight Data Sheets

Operations and Installation Manual

Quality, Inspection & Test plan

General fire and blast certification dossier

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7 PP ESV / SDV to be protected

Six ESV / SDV shall be protected from wave impact on PP Drain Deck. Location of these valves is presentedin Figure 7-1 hereunder. The different valves and associated actuators are presented through Picture 7-1 toPicture 7-6 hereafter.

Figure 7-1 PP Drain Deck Plot Plan

Based on preliminary investigations, main dimensions for ESV / SDV Protection Enclosures listed in Table7-1 are anticipated. These figures are given for information only and shall be confirmed during detailengineering.

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ESV / SDV Tag No Length x Width x Height (mm)

ESV 40267 4,700 x 2,200 x 3,400

ESV 40137 4,700 x 2,200 x 3,400

SDV 40266 4,500 x 1,550 x 2,200

ESV 40021 4,500 x 1,550 x 2,200

ESV 40268 4,550 x 1,300 x 2,450

ESV 40157 4,800 x 1,650 x 2,450

Table 7-1 : PP ESV / SDV - Preliminary Protection Enclosure dimensions

Blanket PFP surrounding ESV 40157 shall be removed by CONTRACTOR prior enclosure installation.

Picture 7-1 : PP Drain Deck - ESV 40267 on 36 export gas line

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Picture 7-2 : PP Drain Deck - ESV 40137 on 36 export gas line

Picture 7-3 : PP Drain Deck - ESV 40021 on 20 gas line from WP2

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Picture 7-4 : PP Drain Deck - ESV 40021 on 20 gas line from WP2

Picture 7-5 : PP Drain Deck - SDV 40266 on 20 gas line from WP2

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Picture 7-6 : PP Drain Deck ESV 40268 on 20 domestic line

Picture 7-7 : PP Drain Deck ESV 40157 on 20 domestic line

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8 WP1 ESV / SDV to be protected

Five ESV / SDV shall be protected on WP1 Cellar Deck. Location of these valves is presented in Figure 8-1hereunder. The different valves and associated actuators are presented through Picture 8-1 to Picture 8-5hereafter.

ESV 10012

SDV 10601

SDV 10952A

20" gas line

10" gas line

ESV 10951

SDV 10952B

Figure 8-1 WP1 Cellar Deck Plot Plan

Based on preliminary investigations, main dimensions for ESV / SDV Protection Enclosures listed in Table8-1 are anticipated. These figures are given for information only and shall be confirmed during detailedengineering.

Blanket PFP surrounding ESV 10951 shall be removed by CONTRACTOR prior enclosure installation.

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ESV / SDV Tag No Length x Width x Height (mm)

SDV 10601 1,850 x 1,300 x 2,600

ESV 10012 5,550 x 1,800 x 2,450

SDV 10952B 1,750 x 600 x 1,250

ESV 10951 2,730 x 1,100 x 1,660

SDV 10952A 2,430 x 1,100 x 1,660

Table 8-1 : WP1 ESV / SDV - Preliminary Protection Enclosure dimensions

Picture 8-1 : WP1 Cellar Deck - ESV 10012 on 20 gas line

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Picture 8-2 : WP1 Cellar Deck - SDV 10601 on 20 gas line

Picture 8-3 : WP1 Cellar Deck - ESV 10951 on 10 gas line from WP3

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Picture 8-4 : WP1 Cellar Deck - SDV 10952A on 10 gas line from WP3

Picture 8-5 : WP1 Cellar Deck - SDV 10952B on 4 by-pass

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9 WP2 ESV to be protected

One ESV shall be protected from wave impact on WP2 Cellar Deck. This ESV is presented in Figure 9-1 andPicture 9-1 hereunder.

ESV 20039


Based on preliminary investigations, main dimensions for the ESV Protection Enclosure listed in Table 8-1are anticipated. These figures are given for information only and shall be confirmed during detailedengineering.

ESV Tag No Length x Width x Height (mm)

ESV 20039 4,400 x 1,700 x 2,500

Table 9-1 : WP2 ESV - Preliminary Protection Enclosure dimensions

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Picture 9-1 : WP2 Cellar Deck - ESV 20039 on 20 gas line

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10 PP Electrical cable and OTU to be protected

On PP platform, following items shall be protected from wave impact with a protection enclosure :

- existing 6.6 kV electrical cable between J-Tube splitter box and Lower Deck,

- existing OTU for optical fibres located above J-Tube

The location of the protection enclosure is presented in Figure 10-1 hereunder.

OTU and 6.6 kV cable

to be protected

Figure 10-1 PP Drain Deck Plot Plan

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Picture 10-1 : PP Drain Deck OUT and 6.6 kV cable to be protected

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11 WP2 Electrical cable to be protected

On WP2 platform, existing 6.6 kV electrical cable between J-Tube splitter box and Main Deck shall beprotected against wave impact with a protection enclosure

The location of this protection enclosure is presented in Figure 11-1 hereunder.

OTU and 6.6 kV cable

to be protected


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Picture 11-1 : WP2 Cellar Deck 6.6 kV electrical cable to be protected