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Previous Issue: Issue: 28 28 February February 2005 2005 Next Next Planned Planned Update: Update: 13 13 July July 20162016 Revised
Revised paragraphs paragraphs are are indicated indicated in in the the right right margin margin Page Page 1 1 of of 1010
Coating Systems Used in Immersion Services
Coating Systems Used in Immersion Services
Document Responsibility
Document Responsibility: Paints
: Paints and Coatings Standards Committee
and Coatings Standards Committee
Saudi Aramco DeskTop Standards
Saudi Aramco DeskTop Standards
Table of Contents Table of Contents
1 Scope... 1 Scope... 22
2
2 Conflicts Conflicts and and Deviations...Deviations... 22
3 References... 3 References... 33
4
4 General General Requirements...Requirements... 44
5
5 Qualification Qualification Tests Tests and and Requirements...Requirements... 55
6
1 Scope
This specification defines the minimum mandatory requirements for qualifying individual coating product for use in Saudi Aramco's approved protective coating systems APCS-2A , APCS-2B, and APCS-2C This specification also shall be used to qualify the thick polymeric coating systems under APCS-2E, APCS-2F, and APCS-2G. The specification shall be used when an y of the following situations occurs:
1.1 Initial Product Approval
This specification shall be given to coating manufacturers, or other vendors of coating products, who need to obtain initial approval for products that have not previously been qualified in accordance with this specification.
1.2 Purchase Requisitions/Purchase Orders
This specification shall be attached to Purchase Requ isitions or Purchase Orders when those documents address the procurement of coating products that have not been previously qualified in accordance with this specification.
This specification does not apply and should not be included with Purchase orders or requisitions for coating products that have been prev iously qualified per this specification. This specification should also not be included with purchase orders or requisitions for coated items or equipment when a Saudi
Aramco approved protective coating system has been specified. 1.3 Periodic Product Compliance Checks
This specification should be used for periodic product compliance checks on previously approved coatings. It shall be given to the organization who shall
conduct the compliance tests.
2 Conflicts and Deviations
2.1 Any conflicts between this specification and other applicable Saudi Aramco Materials System Specifications (SAMSSs), Engineering Standards (SAESs), Standard Drawings (SASDs), or industry standards, codes, and forms shall be resolved in writing by the Company or Buyer Representative through the Manager, Consulting Services Department of Saudi Aramco, Dhahran.
2.2 Direct all requests to deviate from this specification in writing to the Company or Buyer Representative, who shall follow internal company procedure SAEP-302 and forward such requests to the Manager, Consulting Services Department of
3 References
The selection of material and equipment, design, construction, maintenance, and repair of equipment and facilities covered by this specification shall compl y with the latest edition of the references listed below, unless otherwise noted.
a) On the date of the Purchase Order.
b) On the date of the testing is begun if there is no Purchase Order involved. 3.1 Saudi Aramco References
Saudi Aramco Engineering Procedure
SAEP-302 Instructions for Obtaining a Waiver of a
Mandatory Saudi Aramco Engineering Requirement
Saudi Aramco Materials System Specification
09-SAMSS-060 Packaging Requirements for Coatings
Saudi Aramco Engineering Standards
SAES-H-101 APCS-2A Epoxy Coating System for General Immersion Service at Temperature up to 90°C (Self Priming)
SAES-H-101 APCS-2B Epoxy Coating System for Potable Water
Immersion Service at Temperature up to 83°C (Self-Priming)
SAES-H-101 APCS-2C Epoxy Coating System for Immersion Service at Temperatures up to 120°C
SAES-H-101 APCS-2E Solvent free Epoxy Coating applied in a Single-Coat for Immersion Service at Temperature up to 90°C
SAES-H-101 APCS-2F Glass Flake Filled Polyester Fast Curing Systems applied in a Single-Coat for Immersion Service at Temperature up to 90°C
SAES-H-101 APCS-2G Glass Flake Filled Vinyl Ester Fast Curing System applied in a single coat for Immersion Service at Temperature up to 110°C
3.2 Industry Codes and Standards
American Society for Testing and Materials
ASTM D714 Evaluating Degree of Blistering of Paints
ASTM D1193 Reagent Grade Water
ASTM D1640 Drying, Curing or Film Formation of Organic
Coatings at Room Temperature
ASTM D1849 Package Stability of Paint
ASTM G42 Cathodic Disbonding of Immersed Coatings
subjected to Elevated or Cyclic Temperature National Association of Corrosion Engineers (NACE)
TM-01-74 Laboratory Methods for the Evaluation of
Protective Coatings and Lining Materials in Immersion Service
The Society for Protective Coatings
SSPC-PA2 Measurement of Dry Coating Thickness with
Magnetic Gages
SSPC-Vis 1 Visual Standard for Abrasive Blast Cleaned Steel
4 General Requirements
4.1 For purposes of this specification the Buyer's Representative shall be the Responsible Standardization Agency Representative (RSA).
4.2 In order to qualify a coating system as acceptable under this specification, the coating supplier must submit a certified test report documenting to the RS A that the proposed coating system meets the qualification tests and requirements of this SAMSS. Preparation and testing shall be performed and/or witnessed by an independent laboratory or inspection agency. This report shall be submitted to the Saudi Aramco RSA for review and approval.
4.3 All initial product qualification tests shall be carried out at no cost to Saudi Aramco.
4.4 All coating systems supplied for use in potable water service as in (APCS-2B) or any other systems shall have been tested per the appropriate regulatory
the approval consecutively.
5 Qualification Tests and Requirements
5.1 Physical Properties Tests
5.1.1 Package Stability of Paint
When stored at 52°C ± 1°C for 6 months in accordance with ASTM D1849, the sample shall meet the following requirements: a) Weight loss - 0
b) Skinning, pressure and corrosion - 10 c) Settling - 6 or better
d) Grains, lumps, or streaks - 8 or better 5.1.2 Spray Properties
The ready mixed coat shall be easily applied at the maximum dry film thickness specified in paragraph 5.2.4, to a vertical surface with no tendency to orange peel, sag, creep or run.
5.1.3 Drying Times
When tested in accordance with ASTM D1640, the Dry-Through (or Dry-To-Handle) Time shall be 8 hours or less and the Dry-To-Recoat Time shall be in accordance with Manufacturer’s published material data sheets.
5.1.4 Usable Potlife
For APCS- 2A, B, and C at 40°C, the viscosity of the ready-mixed paint shall remain within the range recommended by the manufacturer for spray ability, without adding thinners, for not less than 30 minutes. For APCS-2E, F, and G the usable pot life requirement shall be in accordance with the Manufacturer’s data sheet.
5.1.5 Curing
APCS-2A/2B/2C: The paint shall cure completely within 7 days at a temperature of 20°C after the application.
APCS-2E: The paint shall cure completely within five (5) days at a temperature of 20°C.
APCS-2F and 2G: The paint shall completely cure within 3 days at a temperature of 20°C.
5.1.6 Post Curing
Coatings application in lower temperatures than that described in this standard may require post curing to accelerate the full curing time. Refer to the manufacturer’s materials data sheet and consult with CSD coating engineers for the appropriate post curing procedure.
5.1.7 Adhesion Test
5.1.7.1 Prepare test panels as in Section 5.2.
5.1.7.2 Determine the adhesion of the prime coat to the substrate, Inter-coat adhesion, or cohesion of any two coats of the painting system by using adhesion tester, 450 kg capacity.
Lightly sand the coated surface and aluminum dolly and apply a suitable epoxy adhesive. Allow the adhesive to cure as directed by the adhesive supplier. Scribe the coating and
adhesive around the dolly prior to testing. Make a minimum of three trials and report the average.
5.1.7.3 The acceptable average shall be at least 4150 kPa (600 psi) for APCS-2A, 2B, and 2C. The acceptable average shall be at least 6950 kPa (1000 psi) for APCS-2E, 2F, and 2G.
5.1.7.4 For APCS-2E, F, and G determine the adhesion of the total film thickness to the metal substrate by using the mechan ical pull-off tester ELCOMETER 106 only. The acceptable
average shall be at least 3874 psi. 5.2 Test Panel Preparation
5.2.1 Test panels shall be ASTM A36 hot rolled steel approximately 100 mm x 150 mm. Prior to preparing the surface, the condition of the test panel shall be equivalent to SSPC-Guide to Vis 1 Rust Grade A, Adherent Mill Scale. The minimum thickness of the test panel shall be 5 mm.
5.2.2 Abrasive blast the test panels to meet the cleanliness requirements of White Metal Blast, SSPC SP5 (SIS Sa 3).
APCS-2 A, 2B, and 2C: 40 - 65 microns. APCS-2E, F, and G: 60 -100 microns.
5.2.4 Coatings shall be mixed, applied and cured in accordance with the manufacturer’s recommendations. Dry film thickness (DFT) shall be measured and recorded in accordance with SSPC-PA2, and shall meet the following requirements:
APCS-2A/2B/2C: Minimum three coats
Each coat: 125 micrometers maximum Total system: 275 - 375 micrometers APCS-2E:
Single coat or maximum two coats Total system: 400 - 600 micrometers. APCS-2F and 2G
Single coat or maximum two coats Total system: 600 – 1000 micrometers
If a holding primer is used with this system, the primer shall be tested as a part of the system total dry film thickness.
5.2.4.1 For coating systems employing a holding primer, apply holding primer at approximately 40 to 60 microns dry film thickness. 5.2.4.2 Cure the panel at 60°C for 24 hours before applying the coating
system in accordance with paragraph 5.2.4. 5.3 Immersion Tests
5.3.1 Test panels shall be prepared in accordance with paragraph 5.2. 5.3.2 All tests shall be performed in duplicate.
5.3.3 The fully cured coating shall be tested per NACE Standard TM-01-74, Procedure A-One Sided Testing.
5.3.3.1 Panels coated with systems APCS-2A and APCS-2E shall be exposed to the following test conditions:
a) Reagent Grade Distilled Water which meets the
requirements of ASTM D1193, Type I. Test solution temperature shall be 90°C ±2°C.
b) A one-to-one mixture mineral spirits and brine (5% by weight sodium chloride in distilled water). Test solution temperature shall be 90°C ± 2°C.
5.3.3.2 Panels coated with system APCS-2B shall be tested in potable water at 90°C ± 2°C.
5.3.3.3 Panels coated with systems APCS-2C, 2F, 2G shall be tested in Reagent Grade Distilled Water meeting the requirements of ASTM D1193, Type I. Test temperature shall be 110°C ±2°C in a pressurized test chamber.
5.3.3.4 At the conclusion of six months exposure in immersion condition, the coating systems shall be evaluated t o meet the criteria in Table 1.
Table 1
–
Immersion Test Acceptance RatingStandard Acceptable Rating
ASTM D714
Evaluating Degree of Blistering of Paints
No blisters ASTM D610
Evaluating Degree of Rusting on Painted Steel Surfaces
9 or better
NACE TM-01-74
Hardness and Adhesion
When tested in accordance with paragraph 6.2.4 of TM-01-74, the coating shall show no more than a two pencil hardness difference and the adhesion between wet and dry portions of the panel shall be similar. After conditioning in laboratory for seven days there shall be no difference.
5.4 Cathodic Disbondment
5.5.1 High temperature - high pressure (Autoclave) chemical resistance test results shall not show more than 4 blisters of size 8 or less, as defined in ASTM D714 and no loss of adhesion per the procedure outlined in paragraph 5.1.6.2 of this specification. They shall not show any sign of
cracking or delamination.
5.5.2 The fully cured specimens will be immersed half-way in the specified test solutions in the autoclave. After sealing, the test chamber shall be heated to the test temperature specified in Table 2. Stable conditions (temperature/pressure) shall be maintained for a minimum of 18 hou rs, after which the heat shall be discontinued. The unit shall be cooled to 85°C and the pressure released over a time period of one minute.
The specimens shall be conditioned for one hour at 25°C prior to being assessed.
Table 2
–
Chemical Resistance Test ParametersCoating System Test
Medium Test Temp. Test Pressure Test Time APCS-2A and APCS-2E
Formation water brine 5% H2S 5% CO2 90% methane 90°C 6890 kPa 24 hrs APCS-2A, 2C, 2E, 2F, and 2G Distilled water 5% H2S 5% CO2 90% methane 90°C 6890 kPa 24 hrs APCS-2Fand 2G Formation Brine water, 5% H2S, 5%CO2, and 90% Methane 110°C 6890kPa 24 hrs
5.5.3 The pressurizing gas shall be methane. 5.6 Coating Materials Identification
The manufacturers and vendors shall provide the fingerprints of the products supplied under APCS-2E, 2F, and 2G in this specification. The fingerprint of all batches related to each product under these three APCS must be submitted along
with the material technical data sheets for RSA review and approval. FTIR technique shall be used as the method for Infra Red scanning in this
6 Method of Packaging
Coatings shall be packaged in accordance with 09-SAMSS-060.
Revision Summary
13 July 2011 Revised the “Next Planned Update” Reaffirmed the contents of the document and reissued with editorial revision to remove the committee members list.
