SP-1246-2 Specification_for_Painting_and_Coating of Oil and Gas Production Facilities part-2
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.
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.
Contents
1Preface (4)
1.1Background (4)
1.2Applicability (4)
1.3Units of Measurement (5)
2Introduction (6)
2.1General (6)
2.2Scope (6)
2.2Paint Terms and Generic Paint Types (6)
3Painting and Coating Selection Schedules (8)
3.1New Construction Works (8)
4Coating Systems (9)
4.1System Compatibility (9)
4.2Painting and Coating Schedules (PCS) (9)
4.3Protective Coatings for Stainless Steel (9)
4.4Health and Environmental Restrictions (9)
4.5Colour Finishes (9)
5Painting and Coating Schedules (PCS) (10)
5.1PCS-1 External coating for above ground structures to 100o C (10)
5.2PCS-2A External coating for below-ground structures up to 70o C (11)
5.3PCS-2B External coating for below-ground structures for more than 70o C (11)
5.4PCS-2C External coating for below-ground structures up to 70o C (11)
5.5PCS-3 External coating for above ground structures at 100-400o C (14)
5.6PCS-4 External coating for steel structures under insulation below ambient to 100o C (15)
5.7PCS-5 External coating for steel structures >400o C (16)
5.8PCS-6 External coating for galvanised steel and stainless steel structures (17)
5.9PCS-7A Internal glass fibre reinforced epoxy lining for tanks up to 60o C (18)
5.10PCS-7B Internal epoxy coating for tanks and vessels up to 60o C (19)
5.11PCS-8 Internal glassflake coating for tanks and vessels at temperatures of 60 to 93o C (20)
5.12PCS-9 Internal coating for vessels at temperatures above 93o C (21)
5.13PCS-10 Internal coating for tanks for potable water (22)
5.14PCS-11A External coating for marine structures (23)
5.15PCS-11B High solids epoxy coating for immersed marine structures (24)
5.16 PCS-12 Internal Flow Coating for Gas Transmission Pipelines in Non-Corros ive Service (25)
6Related Business Control Documents (26)
7Appendix A Glossary of Terms, Definitions and Abbreviations (27)
8User Comment Form (28)
Tables
Table 1 Coating Schedules References (8)
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 2contains 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.
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
Wh ere 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.
.
2 Introduction
2.1 General
This Part of specification SP-1246 gives generic systems and minimum DFT of p ainting 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 e 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 600o C.
Aluminium silicone resin-based paint. Air drying for high temperature service, up to 400o C
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,
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 1110o C.
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 350o C.
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.
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
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
The requirements for colour finishes are given in section 3.3 of Part 1 of this Specification
5 Painting and Coating Schedules (PCS)
5.1 PCS-1 External coating for above ground structures to 100o 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 100o C. 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 2?
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.
3.Shop applied primers can be considered provided they are part of the final coating system.
5.2 PCS-2A External coating for below-ground structures up to 70o 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 70o C.
APPLICABLE STRUCTURES
Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings in carbon or low alloy steel, with or without cathodic protection.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.21 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: 75 microns
COATING SYSTEM
Primer
Type: Not required
Application method:
DFT microns:
Intermediate Coat
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
Total min DFT microns: 500
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
3.Coating can be applied in one coat provided performance test data is also for a single coat system
5.3 PCS-2B External coating for below-ground structures for more than 70o C Specification: SP-1246 Part 2 Rev. Date: May 2009
SCHEDULE:PCS-2B
DESIGNATED USE
External coating for below ground (or immersed) steel structures in onshore locations at service temperatures for more than 70o C.
APPLICABLE STRUCTURES
Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings in carbon or low alloy steel, with or without cathodic protection.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.22 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: 75 microns
COATING SYSTEM
Primer
Type: Not required
Application method:
DFT microns:
Intermediate Coat
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
Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification.
5.4 PCS-2C External coating for below-ground structures up to 70o C Specification: SP-1246 Part 2 Rev. Date: May 2009
SCHEDULE:PCS-2C
DESIGNATED USE
External coating for below ground (or immersed) steel structures in onshore locations at service temperatures up to 70o C.
APPLICABLE STRUCTURES
Buried tanks, vessels, tank bottom plates, buried sections of piping and fittings, in carbon or low alloy steel, with or without cathodic protection.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.23 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: no anchor pattern is required
COATING SYSTEM
Primer
Type: Not required
Application method:
DFT microns:
Intermediate Coat
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.
5.5 PCS-3 External coating for above ground structures at temperatures of 100
– 400oC (insulated or non-insulated)
Specification: SP-1246 Part 2 Rev. Date: Dec 2007
SCHEDULE:PCS-3
DESIGNATED USE
External coating for above ground steel structures in onshore locations at service temperatures of 100-400o C. These can be insulated or not as required.
APPLICABLE STRUCTURES
Flare stacks, furnaces, furnace stacks, flue ducts, exchangers, associated pipework and fittings (insulated or uninsulated) in carbon or low alloy steel.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.1 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: 30 to 40 microns
COATING SYSTEM
Primer
Type: Inorganic zinc silicate
Application method: Airless or conventional spray
DFT microns: 50
Intermediate Coat
Type: Aluminium pigmented silicone
Application method: Airless or conventional spray
DFT microns: 25
Top Coat
Type: As intermediate coat
Application method:
DFT microns: 25
Total min DFT microns: 100
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
4.System must cure at ambient temperatures.
5.6 PCS-4 External coating for above ground structures beneath insulation
under 100o C
Specification: SP-1246 Part 2 Rev. Date: Dec 2007
SCHEDULE:PCS-4
DESIGNATED USE
External coating for above ground steel structures in onshore locations at service temperatures up to 100o C prior to applying insulation.
APPLICABLE STRUCTURES
Tanks, vessels, separators, flare stack piping, exchanger shells, columns, associated pipework and fittings in carbon and low alloy steel under insulation.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.5 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1: 2001 Sa 2?
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
Sweep blast damaged area, apply single coat and inspect as required in Part 3 of this Specification.
5.7 PCS-5 External coating for steel structures >400o C
Specification: SP-1246 Part 2 Rev. Date: Dec 2007
SCHEDULE:PCS-5
DESIGNATED USE
External coating for above ground steel structures in onshore locations at service temperatures >400o C APPLICABLE STRUCTURES
Flare stacks, furnaces, furnace stacks, flue ducts, exchangers, associated pipework and fittings in carbon and low alloy steel.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.5 in Part 1 of this Specification
SURFACE PREPARATION
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
Intermediate Coat
Type: Not required
Application method:
DFT microns:
Finish Coat
Type: Heat resistant aluminium silicone
Application method: Airless or conventional spray
DFT microns: 25
Total min DFT microns: 50
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
2.For uninsulated service thermal sprayed aluminium can be considered.
5.8 PCS-6 External coating for galvanised steel and above ground stainless
steel structures
Specification: SP-1246 Part 2 Rev. Date: May 2009
SCHEDULE:PCS-6
DESIGNATED USE
External coating for above ground galvanised steel and stainless steel structures in onshore locations at service temperatures up to 100o C.
APPLICABLE STRUCTURES
Structural steelwork, supports, handrails, gratings and associated fittings in galvanised carbon steel or stainless steel. TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.1 in Part 1 of this Specification
SURFACE PREPARATION
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
Total min DFT microns: 100
COATING REPAIR
Lightly abrade damaged area, apply primer and intermediate and final coats and inspect as required in Part 3 of this Specification.
NOTES
5.9 PCS-7A Internal glass fibre reinforced epoxy lining for tanks up to 60o C Specification: SP-1246 Part 2 Rev. Date: Dec 2007
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 60o C.
APPLICABLE STRUCTURES
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.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.3 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: 100 microns
COATING SYSTEM
Primer
Type: Two-pack epoxy resin/amine adduct
Application method: Airless or conventional spray
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
Total min DFT microns: 2800
COATING REPAIR
Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification. NOTES
1.Detailed method statement to be provided for review prior to commencement of work
2.Primer thickness as recommended by coating system manufacturer.
3.Lining on lower shell to cover complete area in water phase.
5.10 PCS-7B Internal epoxy coating for tanks and vessels up to 60o C Specification: SP-1246 Part 2 Rev. Date: Dec 2007
SCHEDULE:PCS-7B
DESIGNATED USE
Internal high build epoxy coating for steel tanks and vessels in corrosive service at temperatures up to 60o C. APPLICABLE STRUCTURES
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.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.3 in Part 1 of this Specification
SURFACE PREPARATION
Surface preparation shall comply with Part 4 of this Specification.
Blast cleaning standard: ISO-8501-1:2001 Sa 2?
Surface profile: 75 microns
COATING SYSTEM
Primer
Type: Polyamide cured epoxy primer 50
Application method: Airless or conventional spray
DFT microns:
Intermediate Coat
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
Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification. NOTES
1.Coating thickness may be achieved in a single high build application, if desired
5.11 PCS-8 Internal glassflake coating for tanks and vessels at temperatures of
60 to 93o C
Specification: SP-1246 Part 2 Rev. Date: Dec 2007
SCHEDULE:PCS-8
DESIGNATED USE
Internal corrosion resistant glassflake coating for steel tanks and vessels at temperatures of 60to 93o C. APPLICABLE STRUCTURES
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.
TESTING AND ACCEPTANCE CRITERIA
As shown in Table B1.3 in Part 1 of this Specification
SURFACE PREPARATION
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:
Intermediate Coat
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
Total min DFT microns: 900
NOTE : Manufacturers may recommend and qualify alternative coating system thicknesses COATING REPAIR
Surface preparation, coating application, inspection and repair all as required in Part 3 of this Specification.
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.
5.Coatings for vessels to resist explosive decompression