SP-1246

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Petroleum Development Oman L.L.C.

UNRESTRICTED Document ID : SP-1246

April 2010 Filing key : xxxx

Specification for

Painting and Coating of

Oil and Gas Production Facilities

PART 2:

NEW CONSTRUCTION

COATING SYSTEMS

Keywords: Application Coating Painting Surface Preparation Surface Protection Tanks Vessels

This document is the property of Petroleum Development Oman L.L.C. Neither the whole nor any part of this document may be disclosed to others nor reproduced, stored in a retrieval system, or transmitted in any form by any means (electronic, mechanical, reprographic recording or otherwise) without prior written consent of the owner.

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Version No. Date Author Scope / Remarks

ERD-48-01 Jan 89 ETH/5 Original ERD Document SP-1246 Ver.0 May 2002 OTT/11 Updated and in new PDO format SP-1246 Ver.1 July 2003 TTO/11 Updated

SP-1246 Ver.2 April 2010 UEC/121 For issue

INSTRUCTIONS TO USER

Make sure this is the latest issue of this specification. Refer to the EMDS for the last issue date.

Where this Specification refers to DEPs and International Standards, it refers to the issues that were in use when the author wrote this Specification. Exceptions are references to specific issues. If you use DEPs or International Standards with this Specification, make sure you use the latest issues.

Do not change this Specification without approval. Only the Custodian, the Corporate Functional Discipline Head (CFDH), who owns this Specification, can give approval for changes. If you think the Specification is not correct, write your comments on a copy of the User Comment Form in Section 9 of this Specification.

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1 Preface ... 4

1.1 Background...4 1.2 Applicability ...4 1.3 Units of Measurement...5

2 Introduction ... 6

2.1 General...6 2.2 Scope ...6

2.2 Paint Terms and Generic Paint Types...6

3 Painting and Coating Selection Schedules ... 8

3.1 New Construction Works...8

4 Coating Systems... 9

4.1 System Compatibility ...9

4.2 Painting and Coating Schedules (PCS)...9

4.3 Protective Coatings for Stainless Steel ...9

4.4 Health and Environmental Restrictions ...9

4.5 Colour Finishes...9

5 Painting and Coating Schedules (PCS) ... 10

5.1 PCS-1 External coating for above ground structures to 100oC ...10

5.2 PCS-2A External coating for below-ground structures up to 70oC...11

5.3 PCS-2B External coating for below-ground structures for more than 70oC ...11

5.4 PCS-2C External coating for below-ground structures up to 70oC...11

5.5 PCS-3 External coating for above ground structures at 100-400oC...14

5.6 PCS-4 External coating for steel structures under insulation below ambient to 100oC ...15

5.7 PCS-5 External coating for steel structures >400oC ...16

5.8 PCS-6 External coating for galvanised steel and stainless steel structures ...17

5.9 PCS-7A Internal glass fibre reinforced epoxy lining for tanks up to 60oC ...18

5.10 PCS-7B Internal epoxy coating for tanks and vessels up to 60oC ...19

5.11 PCS-8 Internal glassflake coating for tanks and vessels at temperatures of 60 to 93oC ...20

5.12 PCS-9 Internal coating for vessels at temperatures above 93oC ...21

5.13 PCS-10 Internal coating for tanks for potable water...22

5.14 PCS-11A External coating for marine structures...23

5.15 PCS-11B High solids epoxy coating for immersed marine structures...24

5.16 PCS-12 Internal Flow Coating for Gas Transmission Pipelines in Non-Corrosive Service……….25

6

7 Appendix A Glossary of Terms, Definitions and Abbreviations ... 27

8 User Comment Form ... 28

Tables Table 1 Coating Schedules References...8

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1 Preface

1.1 Background

This Specification SP-1246 covers the minimum requirements for protective painting and coating systems, materials and application methods for the internal and external surface of steel structures and equipment within the oil and gas production facilities.

Relevant structures and equipment include aboveground and buried onshore tanks, vessels, in-station pipe work, structural steel, and surface electrical and mechanical equipment.

Whilst the Specification is directed predominantly at protection of onshore oil and gas installations, it also covers external protective coating of marine facilities such as jetties, mooring buoys, barges and launches. Internal surfaces of pumps, valves and other mechanical equipment requiring special protective treatments are not dealt with in this Specification. For guidance on this contact UER/CFDH Materials and Corrosion. The external coating of new pipelines and existing pipelines requiring rehabilitation are covered in alternative Specifications and procedures which are shown below.

GU-368 Guidelines For The Protection Of Buried Sections Of Surface Laid Pipelines/Flowlines PR-1180 Procedure for Qualification of Pipeline Rehabilitation Coating Systems

DEP 31.40.30.31-Gen. Technical Specification for External Polyethylene and Polypropylene Coating for Line Pipe

DEP 31.40.30.32-Gen. Technical Specification for External Fusion-bonded Epoxy Powder Coating for Line Pipe

DEP 31.40.30.37-Gen External Field Joint and Rehabilitation Coatings System For Line Pipe.

1.2 Applicability

All coating work shall be carried out in accordance with this Specification. If a variance is required then approval in writing from UER/CFDH Materials and Corrosion is required.

This Specification is not applicable retroactively.

This specification does not apply to concrete structures. For concrete structures in corrosive environment consult UER/CFDH Materials and Corrosion.

This is Part 2 of a five-part Specification and must be read in conjunction with Parts 1, 3, 4 and 5.

PART 1 specifies technical and related requirements. This part includes performance tests and acceptance

criteria for assessing the acceptability of paint/coating/lining systems for each service specified in Parts 2 and 3.

PART 2 contains recommended protective coating systems for the following categories with respect to

new construction painting/coating activities:

- External surfaces of carbon steel structures, piping and equipment, onshore and marine - External surfaces of buried carbon steel structures, piping and buried sections of above ground

flowlines and pipelines. (except Class I and Class II pipelines) - Internal surfaces of tanks and vessels

- Stainless steel and galvanised piping and equipment - Areas beneath insulation

- Specialist applications

This Part also gives descriptions of the generic types of paint used for new construction projects. The descriptions apply equally to the maintenance paint systems presented in Part 3.

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Protective coatings for new pipelines based on Polyethylene (PE), Polypropylene (PP) or Fusion Bonded Epoxy (FBE) are not covered in this Specification but the general good practices described in this part are equally applicable to the coating of line pipe.

PART 3 contains recommended Maintenance coating systems for the following categories with respect to

location and painting/coating activities and inspection of old coatings:

- External coatings on carbon steel structures, piping and equipment, onshore and marine - External surfaces of buried carbon steel structures, piping including Class I and Class II

pipelines

- Internal coated surfaces of tanks and vessels - Stainless steel and galvanised piping and equipment - Coatings beneath insulation

PART 4 contains the detailed requirements for Surface Preparation and Application of Coatings to the

categories stated in Parts 2 and 3. This Part contains HSE advice and general inspection requirements.

PART 5 contains the list of approved coating systems and is a live document that will be updated by UER.

This includes coating systems that have been grandfathered in.

New Projects

PARTS 1, 2 and 3 apply in their entirety to new projects where painting and coating activities are carried

out at site or in the shop.

For painting and coating of package items, carried out prior to delivery to site or to existing facilities, the requirements, stated in PARTS 1 and 4, apply in their entirety, whilst those of PART 2 apply where applicable.

Maintenance

Where maintenance painting is to be done, PDO’s technical requirements are stated in PART 1 and those sections of PART 3 and 4 as appropriate, dependent upon the Scope of Work.

1.3 Units of Measurement

This specification uses and requires the use of the International System (SI) units of measurement in all documentation. Paint film thicknesses are expressed in microns, 1micron is 0.001mm.

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2 Introduction

2.1 General

This Part of specification SP-1246 gives generic systems and minimum DFT of painting and coating systems that PDO recommends for the various structures and service conditions identified. The schedules refer to the coating systems PCS-1 to PCS-12.

2.2 Scope

This part of the specification covers the performance and acceptance requirements of the coating systems to be used. Testing has to be done by an independent laboratory or test facility. The proposed Vendor coating systems have to pass the performance criteria detailed in this part of the Specification and be submitted to PDO for approval.

2.2 Paint Terms and Generic Paint Types

The following definitions and clarifications are presented below to assist with the understanding of the types of paints and paint terms used in this Specification:

Alkyd resin

Amine adduct Amino resin

Alkyl zinc silicates

Aluminium silicones

Epoxy resins

Galvanising Gloss

High-build amine-cured epoxies

High-build polyamide-cured epoxy Holding primer Holidays Leafing pigments

Polyester resin modified by a fatty acid. Made for example by reacting glycerol with phthalic anhydride and linseed fatty acid. Low alkali resistance.

A resinous amine used as a curing agent for epoxy resins.

General term for resins made by reacting formaldehyde with an amine or amide, eg urea-formaldehyde resin.

Two component, moisture curing zinc silicate, containing minimum 87% metallic zinc. Hard abrasion resistant coating suitable for services up to 600oC.

Aluminium silicone resin-based paint. Air drying for high temperature service, up to 400oC

Resins made by the polymerisation of hydroxyl and epoxy groups in the absence of esters. Excellent alkali resistance.

Zinc coating applied in a molten zinc bath The reflectivity of a surface film.

Amine-cured epoxy resin coatings with good resistance to chemicals and solvents.

Amide-cured epoxy resin coatings superior to amine-cured epoxies in respect of durability, flexibility and pot-life.

A low-build blast primer used to provide temporary protection to steelwork until the complete coating system can be applied. Areas that have been missed during paint application.

Paints containing plate-like pigments such as micaceous iron oxide or aluminium flakes. Platelets arrange themselves more or less parallel to the substrate surface and are effective in reducing water uptake. Two component, high build, amine-cured phenolic epoxy coatings,

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Phenolic epoxies Polyester resin Polysiloxane Polyisocyanate Polyurethanes Polyurethanes, aliphatic, highi-build Primer Sealer coat Silicone acrylics Solvent-free epoxies

Metallic coatings (clad or sprayed)

Vinyl resin

Zinc-rich epoxy primer

Water-based paints

showing excellent resistance to solvents and organic acids Chemically, any resin that is made by esterification. Term usually applied to resins that are not formulated using fatty acids. Two-component, inorganic polysiloxane used for extreme heat resistance up to 1110oC.

A resinous isocyanate, used as a curing agent in a two-pack polyurethane paint system.

Resin systems inPartving urethane groups and cured with

polyisocyanate. A wide variety of coating systems is available based on the various urethane formulations.

Two-component isocyanate-free urethanes, designed to produce hard, durable and chemically resistant coatings.

The initial coat of paint in a protective coating system. Depending on the formulation, may be used:

- to seal a porous substrate,

- as an inhibitive coating to resist corrosion, to provide improved adhesion.

A coating, that may be clear or pigmented, incorporated into a system as a barrier coat to prevent:

- ‘bleeding though’ of a colour of a previous coat, - damage by solvents from subsequent coats.

One component aluminium (or colour) pigmented acrylic-modified silicone resin. Room temperature cured and heat resistant up to 350oC.

Two component, amine-cured modified epoxies without solvents. Applied as heavy-duty coatings in high film thicknesses.

Used in applications where organic coatings are unsuitable because of high temperature/pressure service conditions.

Copolymer of vinyl chloride and vinyl acetate.

Two component epoxy initial coating used to provide sacrificial protection to the underlying steel.

General name for resin systems in which organic solvents have been replaced completely or in part by water.

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3 Painting and Coating Selection Schedules

3.1 New Construction Works

The following Table 1 summarises the selection of recommended coating systems, identified as PCS-1 to PCS-12, for the various structures, locations and service conditions. For painting and coating of package items and equipment coated at Vendors facilities alternatives to those shown below and approved in Part-5 can be used provided they are of the same generic type and the minimum coating thicknesses shown in the PCS. Details of such proposed systems must be submitted for approval by UER.

Table 1 Coating Schedules References

Area of Application Coating Reference

Nos. External Above Ground

External coating for carbon steel structures at up to 100oC

Epoxy system comprising: Primer

Intermediate coat PU Top coat Min DFT 200 microns

PCS-1

External Coating 100-400oC Ambient curing system Inorganic zinc silicate

Heat resistant aluminium silicone Min. DFT 100 microns

PCS-3

External Coating for Steel beneath Insulation - Below ambient to 100oC

Aluminium mastic to min. DFT 125 microns PCS-4 External Coating for Steel

>400oC

Silicone system or thermal sprayed aluminium Min. DFT 100 microns

PCS-5 External Coating for Galvanised

Carbon Steel and Stainless steel

Epoxy Intermediate and PU top coat Min. DFT 125 microns

PCS-6

Buried carbon steel

External Below Ground <70 oC Amine cured epoxy min DFT 500 microns

PCS-2A External Below Ground >70 oC Solvent free epoxy or high solid phenolic epoxy

min DFT 1000 microns

PCS-2B External Below Ground <70 oC Visco Elastic Wrapping and Shrink sleeve for

maintenance

PCS-2C

Internal Coatings for Vessels and Tanks <60oC

Crude oil storage tanks

GRE lining for steel in continuous water phase GRE lining to min DFT 3000 microns.

Appurtenances & piping to be coated with PCS-7b

PCS-7A

<60oC

Tanks/vessels in water/hydrocarbon service

GRE lining for steel in continuous water phase as in PCS-7a as appropriate for tank/vessel design. Rest of tank/vessel; High build solvent free epoxy to min. DFT 500 microns PCS-7B 60 - 93oC Vessels/tanks in water/hydrocarbon service Glassflake system

Bisphenol A polyester or vinyl ester glassflake reinforced epoxy to min. DFT 900 microns or as Manufacturer’s recommendations

PCS-8

>93oC

Vessels in hydrocarbon service

Manufacturer’s recommended and qualified systems. Seek advice from CFDH.

PCS-9

Potable Water Tanks/Equipment High build solvent free polyamide cured epoxy Min. DFT 325 microns

PCS-10 Gas Pipeline Flow Coat Epoxy coating

Min.DFT 75 microns

PCS-12

Coatings for Marine structures

External Above Water As PCS-1 to min. DFT 250 microns PCS-11A Submerged High solids modified epoxy as PCS-2

Min. DFT 400microns

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4 Coating Systems

4.1 System Compatibility

The protective coating system should be selected on the basis of the complete installation so as to achieve a fully compatible system at the time of final construction. Each component of a coating system shall be supplied by the same manufacturer.

Holding primers must not form part of the final coating system and must be removed before the approved coating system is applied. Approved coating system primers may be shop applied with subsequently coats applied at site providing the Manufacturer’s requirements are met.

4.2 Painting and Coating Schedules (PCS)

No alterations or changes may be made to the PCS data sheets provided in this Part without prior approval of the Custodian of this Specification who will copy the data sheets and initial them to signify his approval of such changes.

The Schedules in Section 5 give typical values for surface profile and minimum DFT for paint thicknesses. These may vary from those recommended by the paint manufacturers and should therefore be used as a guide to minimum values.

Part 4 of this Specification gives information on the surface preparation, coating application, inspection requirements and HSE referred to in the data sheets.

Part 5 of this specification gives the approved list of coating systems and will be continually updated by UER/CFDH Materials and Corrosion..

4.3 Protective Coatings for Stainless Steel

Paints specified for application directly to austenitic, duplex or high nickel-chromium alloys shall not contain free chlorides or halides after curing. In addition, such coatings shall not contain metallic zinc although inhibitive paints containing zinc oxide or zinc phosphate are acceptable.

4.4 Health and Environmental Restrictions

Because of hazards to health and the environment, PDO has restricted the use of the following paints: - Paints containing lead

- High VOC containing paints - Paints containing cadmium - Paints containing coal tar

- Anti-fouling paints containing biocides or tributyl tin

4.5 Colour Finishes

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5 Painting and Coating Schedules (PCS)

5.1 PCS-1 External coating for above ground structures to 100

o

C

Specification: SP-1246 Part 2 Rev. Date: Dec 2007

SCHEDULE:

PCS-1

DESIGNATED USE

External coating for above ground steel structures in onshore (desert) locations at service temperatures up to 100oC.

APPLICABLE STRUCTURES

Tanks, vessels, separators, flare stacks, exchangers, columns, supports, structural steel, pipework and fittings (uninsulated) in carbon or low alloy steel.

TESTING AND ACCEPTANCE CRITERIA

As shown in Table B1.1 1 in Part1 of this Specification

SURFACE PREPARATION

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 2½ Surface profile: 50 to 75 microns

COATING SYSTEM

Primer

Type: Polyamide cured epoxy primer Application method: Airless or conventional spray

DFT microns: 50

Intermediate Coat

Type: Polyamide cured epoxy (high build) Application method: Airless spray

DFT microns: 100

Top Coat

Type: Two-pack high build aliphatic polyurethane Application method: Airless spray

DFT microns: 50

Total min DFT microns: 200

COATING REPAIR

Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification.

NOTES

1. Zinc rich epoxy primers may be used. 2. Water borne systems may be used.

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5.2 PCS-2A External coating for below-ground structures up to 70

o

C

Specification: SP-1246 Part 2 Rev. Date: May 2009

SCHEDULE:

PCS-2A

DESIGNATED USE

External coating for below ground (or immersed) steel structures in onshore locations at service temperatures up to 70oC.

Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings in carbon or low alloy steel, with or without cathodic protection.

As shown in Table B1.21 in Part 1 of this Specification

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 2½ Surface profile: 75 microns

COATING SYSTEM

Primer

Type: Not required

Application method:

DFT microns:

Type: High build, high solids modified epoxy Application method: Airless or conventional spray

DFT microns: 250

Top Coat

Type: High build, high solids modified epoxy Application method: Airless spray

DFT microns: 250

COATING REPAIR

Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification. NOTES

1. This system replaces the previously used coal tar epoxy systems favoured for buried (or immersed) applications.

2. Coating to be applied by PDO approved applicators

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5.3 PCS-2B External coating for below-ground structures for more than 70

o

C

SCHEDULE:

PCS-2B

DESIGNATED USE

External coating for below ground (or immersed) steel structures in onshore locations at service temperatures for more than 70oC.

Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings in carbon or low alloy steel, with or without cathodic protection.

COATING SYSTEM

Primer

Type: Not required

Application method:

DFT microns:

Type: High build, high solids modified epoxy Application method: Airless or conventional spray

DFT microns: 500

Top Coat

Type: High build, high solids modified epoxy Application method: Airless spray

DFT microns: 500

Total min DFT microns: 1000

COATING REPAIR

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5.4 PCS-2C External coating for below-ground structures up to 70

o

C

SCHEDULE:

PCS-2C

DESIGNATED USE

External coating for below ground (or immersed) steel structures in onshore locations at service temperatures up to 70oC.

Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings, in carbon or low alloy steel, with or without cathodic protection.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 2½ Surface profile: no anchor pattern is required

COATING SYSTEM

Primer

Type: Not required

Application method:

DFT microns:

Type: Visco Elastic polymer wrapping or shrink sleeve for maintenance Application method: manual wrapping or machine

DFT microns: 2 .08mm

Top Coat

Type: PVC reinforce wrapping Application method: manual wrapping or machine

DFT microns: 0.8mm

Total min DFT microns: 2.88mm

COATING REPAIR

Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification. NOTES

1. Coating to be applied by PDO approved applicators

2. Coating can be applied in one coat provided performance test data is also for a single coat system 3. Testing shall be carried out at the specified design temperature.

4. Coating to be applied by PDO approved applicators.

5. The qualification requirements in part 1 is only applicable for visco elastic material. The Shrink sleeve qualification shall be as per this DEP 31.40.30.37.

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5.5 PCS-3 External coating for above ground structures at temperatures of 100

– 400ºC (insulated or non-insulated)

SCHEDULE:

PCS-3

DESIGNATED USE

External coating for above ground steel structures in onshore locations at service temperatures of 100-400oC. These can be insulated or not as required.

Flare stacks, furnaces, furnace stacks, flue ducts, exchangers, associated pipework and fittings (insulated or uninsulated) in carbon or low alloy steel.

COATING SYSTEM

Primer

Type: Inorganic zinc silicate Application method: Airless or conventional spray

DFT microns: 50

Type: Aluminium pigmented silicone Application method: Airless or conventional spray

DFT microns: 25

Top Coat

Type: As intermediate coat

Application method:

DFT microns: 25

COATING REPAIR

Small area of damage (<5cm2/1m2), apply intermediate and top coats. For larger areas of damage, prepare surface, apply coating system and inspect all as required in Part 3 of this Specification.

NOTES

1. Zinc silicate paint to contain min 60% solids by part 2. Silicate coating may be applied in single coat 3. All paints from same manufacturer

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5.6 PCS-4 External coating for above ground structures beneath insulation

under 100

o

C

SCHEDULE:

PCS-4

DESIGNATED USE

External coating for above ground steel structures in onshore locations at service temperatures up to 100oC prior to applying insulation.

Tanks, vessels, separators, flare stack piping, exchanger shells, columns, associated pipework and fittings in carbon and low alloy steel under insulation.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1: 2001 Sa 2½ Surface profile: 40 microns

COATING SYSTEM

Primer

Type: Not required

Application method: DFT microns:

Single Coat

Type: One coat of aluminium pigmented

polyamide cured epoxy mastic

Application method: Airless or conventional spray

DFT microns: 125

Total min DFT. Microns: 125

COATING REPAIR

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5.7 PCS-5 External coating for steel structures >400

o

C

SCHEDULE:

PCS-5

DESIGNATED USE

External coating for above ground steel structures in onshore locations at service temperatures >400oC

Flare stacks, furnaces, furnace stacks, flue ducts, exchangers, associated pipework and fittings in carbon and low alloy steel.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1: 2001 Sa 2 Surface profile: 25 microns

COATING SYSTEM

Primer

Type: Heat-resistant aluminium silicone Application method: Airless or conventional spray

DFT microns: 25

Type: Not required

Application method:

DFT microns:

Finish Coat

Type: Heat resistant aluminium silicone Application method: Airless or conventional spray

DFT microns: 25

COATING REPAIR

Small areas of damage (<5cm2/1m2), apply finish coat. For larger areas, surface preparation, coating application and inspection, all as required in Part 3 of this Specification.

NOTES

1. System must cure at ambient temperatures

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5.8 PCS-6 External coating for galvanised steel and above ground stainless

steel structures

SCHEDULE:

PCS-6

DESIGNATED USE

External coating for above ground galvanised steel and stainless steel structures in onshore locations at service temperatures up to 100oC.

Structural steelwork, supports, handrails, gratings and associated fittings in galvanised carbon steel or stainless steel.

Light sweep blast.

For weathered galvanising sweep blasting is recommended.

Cleaning standard: Thoroughly degrease and rinse in clean water. Hand abrasion to remove zinc salts and other deposits.

Surface profile: Roughened for key by sweep blasting

COATING SYSTEM Primer Type: Application method: DFT microns: Intermediate Coat

Type: High build polyamide cured epoxy Application method: Airless spray

DFT microns: 50

Top Coat

Type: High build aliphatic polyurethane Application method: Airless spray

DFT microns: 50

COATING REPAIR

Lightly abrade damaged area, apply primer and intermediate and final coats and inspect as required in Part 3 of this Specification.

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5.9 PCS-7A Internal glass fibre reinforced epoxy lining for tanks up to 60

o

C

SCHEDULE: PCS-7A

DESIGNATED USE

Internal glass fibre reinforced epoxy lining for protection of steel oil storage tanks and vessels that are in a continuous water phase at temperatures up to 60oC.

Bottom part of shells of carbon steel tanks and vessels that are subject to exposure to a continuous water phase. Such structures include, crude oil storage tanks, water knock-out and dehydration tanks, inlet separators in corrosive water and wet hydrocarbon service.

COATING SYSTEM

Primer

Type: Two-pack epoxy resin/amine adduct

DFT microns: see below

Fill Coating for overlap welds etc.

Type: Epoxy based sand-filled putty

Application method: Hand trowel

Intermediate Layer

Type: Epoxy resin amine adduct cured

Two layers of 300gm/m2 chopped strand mat One layer of 300 micron glass surfacing tissue Application method: Hand lay-up

DFT microns: 1200 min

Top Layer

Type: All as intermediate layer

DFT microns: 1200 min

Overseal Layer

Type: Flood coat of epoxy resin

DFT microns 300min

COATING REPAIR

NOTES

1. Detailed method statement to be provided for review prior to commencement of work 2. Primer thickness as recommended by coating system manufacturer.

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5.10 PCS-7B Internal epoxy coating for tanks and vessels up to 60

o

C

SCHEDULE:

PCS-7B

DESIGNATED USE

Internal high build epoxy coating for steel tanks and vessels in corrosive service at temperatures up to 60oC.

Areas in the water phase such as piping, fittings and other appurtenances that are not practical to coat with GRE. Remainder of surfaces in GRE lined carbon steel tanks and vessels in corrosive service which are not in the water phase. This includes areas above the GRE lining such as, nozzles, internals, roof plates and rafters.

This does not include areas above the GRE lining in crude oil storage tanks located at MAF which are considered not to be in corrosive service.

COATING SYSTEM

Primer

Type: Polyamide cured epoxy primer 50

DFT microns:

Type: Solvent-free high solids amine adduct cured epoxy Application method: Airless or conventional spray

DFT microns: 225

Top Coat

Type: Solvent-free high solids amine adduct cured epoxy Application method: Airless or conventional spray

DFT microns: 225

Total DFT microns: 500

COATING REPAIR

NOTES

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5.11 PCS-8 Internal glassflake coating for tanks and vessels at temperatures of

60 to 93

o

C

SCHEDULE:

PCS-8

DESIGNATED USE

Internal corrosion resistant glassflake coating for steel tanks and vessels at temperatures of 60to 93oC.

Bottom part of shells of carbon steel tanks and vessels that are subject to exposure to a continuous water phase. Such structures include, crude oil storage tanks, water knock-out and dehydration tanks, inlet separators in corrosive water and wet hydrocarbon service.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 3 Surface profile: 75 microns

COATING SYSTEM

Primer

Type: System dependent

Application method:

DFT microns:

Type: Glassflake Bisphenol A or vinyl ester Application method: Airless spray, plural component spray

DFT microns: 450

Top Coat

Type: Glassflake Bisphenol A or vinyl ester Application method: Airless spray, plural component spray

DFT microns: 450

NOTE : Manufacturers may recommend and qualify alternative coating system thicknesses

COATING REPAIR

NOTES

1. Manufacturers recommendations for the qualified system must be followed. Resin system selection dependent on actual design temperature, coating manufacturers shall be consulted in all cases.

2. Thicknesses are indicative. Coating thickness as used in qualification to be specified. Refer to part-5 for approved thickness.

3. Detailed method statement to be provided for review prior to commencement of work. 4. Vendor’s approved applicator to be used under Vendor’s supervision.

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5.12 PCS-9 Internal coating for vessels at temperatures above 93

o

C

SCHEDULE:

PCS-9

DESIGNATED USE

Internal coating for steel vessels for temperatures above 93oC.

Carbon steel vessels in water/hydrocarbon service at temperatures >93 oC

As shown in Table B1.3 in Part 1 of this Specification.

Vendor to specify maximum allowable service temperature and provide test data to verify this temperature

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa3 Surface profile: System dependent

COATING SYSTEMS

Specialist high temperature coatings such as epoxy novolac and vinyl ester novolac based systems to be proposed and qualified by Manufacturers.

NOTES

1. Manufacturers recommendations for the qualified coating system must be followed. Coating thickness as used in qualification to be specified. Refer to Part 5 for approved thickness.

2. Maximum operating temperature as used in qualification to be specified in Part 5 3. Detailed method statement to be provided for review prior to commencement of work. 4. Coatings for vessels to resist explosive decompression

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5.13 PCS-10 Internal coating for tanks for potable water

SCHEDULE: PCS-10

DESIGNATED USE

Internal epoxy coating for potable water service for temperatures up to 60oC.

All internal surfaces of carbon or low alloy steel tanks for potable water. All wetted surfaces, with or without cathodic protection.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 2½-3 Surface profile: 50-75 microns

COATING SYSTEM

Primer/First Coat

Type: System Dependent

DFT microns:

Type: High build sloventless polyamine cured epoxy Application method: Airless spray

DFT microns: 200

Top Coat

Type: As for intermediate coat Application method:

DFT microns: 200

COATING REPAIR

NOTES

1. Epoxy holding primer, optional, may be required for large areas

2. Coatings must have appropriate potable water approval/certification eg. compliance with BS 6920.

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5.14 PCS-11A External coating for marine structures

SCHEDULE:

PCS-11A

DESIGNATED USE

External coating for above water steel structures in a marine environment.

Non-immersed topside steel structures of marine structures such as jetties, mooring buoys, launches and barges

COATING SYSTEM

Primer

Type: Polyamide cured epoxy primer Application method: Airless or conventional spray

DFT microns: 50

Type: Polyamide cured epoxy (high build) Application method: Airless spray

DFT microns: 140

Top Coat

Type: Two-pack high build polyurethane Application method: Airless spray

DFT microns: 60

Total DFT microns: 250

COATING REPAIR

NOTES

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5.15 PCS-11B High solids epoxy coating for immersed marine structures

SCHEDULE: PCS-11B

DESIGNATED USE

High solids epoxy coating for immersed marine applications and wetted areas of fixed structures.

Below water areas of marine vessels such as SPMs, barges and launches, with or without cathodic protection.

Surface preparation shall comply with Part 4 of this Specification. Blast cleaning standard: ISO-8501-1:2001 Sa 2½ Surface profile: 50-75 microns

COATING SYSTEM

Primer

Type: Two-pack high solids modified epoxy

Application method: Airless spray

DFT microns: 250 Intermediate Coat Type: As Primer Application method: DFT microns: 250 Top Coat

Type: Fouling control system Optional

Application method: Airless spray DFT microns:

COATING REPAIR

NOTES

1. Where local restrictions apply, use biocide-free antifouling paints based on silicone elastomer 2. An intermediate coating to enhance adhesion may need to precede the antifouling coat 3. Coating system to cover the complete tidal zone

(25)

5.16 PCS-12 Internal Flow Coating for Gas Transmission Pipelines in

Non-Corrosive Service

Specification: SP-1246 Part 2 Rev. Date: May2009

SCHEDULE:

PCS-12

DESIGNATED USE

Internal epoxy flow coating for gas transmission lines.

Internal surface of gas transmission pipelines that are not in corrosive service..

As shown in table B1.5 of Part 1 of this specification in general accordance with DEP.31.40.30.35

COATING SYSTEM One coat

Type: Epoxy flow coat

DFT microns: 75

COATING REPAIR

NOTES

(26)

6

7 Appendix A

Glossary of Terms, Definitions and

Abbreviations

CFDH Corporate Functional Discipline Head

ISO International Organisation for Standardisation ASTM American Society for Testing and Materials

BS British Standards

DEP Design and Engineering Practice (SIEP) UER CFDH Materials and Corrosion

(28)

8 User Comment Form

User Comment Form

If you find something that is incorrect, ambiguous or could be better in this Procedure, write your comments and suggestions on this form. Send the form to the Document Control Section (DCS). They make a record of your comment and send the form to the correct CFDH. The form has spaces for your personal details. This lets DCS or the CFDH ask you about your comments and tell you about the decision.

Procedure Details Title:

_Issue

Date:

Number:

Page Number:

_{Heading Number:}

_{Figure Number:}

Comments:

Suggestions:

User’s personal details

Name: Ref.

Ind.:

Signature: Date: Phone:

Document Control Section Actions

Comment Number: Date: CFDH Ref. Ind.: Recd.: To CFDH: CFDH Actions recd. Date: Decision: Reject:

Accept, revise at next issue:

Accept, issue temporary

amendment

Inits.:

Ref. Ind. Date: Comments: Originator Advised:

Date: Inits.:

Document

Control Advised.

SP-1246

Petroleum Development Oman L.L.C.

Specification for

Painting and Coating of

Oil and Gas Production Facilities

PART 2:

NEW CONSTRUCTION

COATING SYSTEMS

INSTRUCTIONS TO USER

Contents

1

Preface ... 4

2

Introduction ... 6

3

Painting and Coating Selection Schedules ... 8

4

Coating Systems... 9

5

Painting and Coating Schedules (PCS) ... 10

6

Related Business Control Documents... 26

7

Appendix A Glossary of Terms, Definitions and Abbreviations ... 27

8

User Comment Form ... 28

1

Preface

1.1

Background

1.2

Applicability

1.3

Units of Measurement

2

Introduction

2.1

General

2.2 Scope

2.2

Paint Terms and Generic Paint Types

3

Painting and Coating Selection Schedules

3.1

New Construction Works

4

Coating Systems

4.1

System Compatibility

4.2

Painting and Coating Schedules (PCS)

4.3

Protective Coatings for Stainless Steel

4.4

Health and Environmental Restrictions

4.5

Colour Finishes

5

Painting and Coating Schedules (PCS)

5.1

PCS-1 External coating for above ground structures to 100

C

SCHEDULE:

PCS-1

5.2

PCS-2A External coating for below-ground structures up to 70

C

SCHEDULE:

PCS-2A

5.3

PCS-2B External coating for below-ground structures for more than 70

C

SCHEDULE:

PCS-2B

5.4

PCS-2C External coating for below-ground structures up to 70

C

SCHEDULE:

PCS-2C

5.5

_Issue

_{Heading Number:}

_{Figure Number:}