AS 3862:2020 pdf External fusion-bonded epoxy coating for steel pipes

AS 3862:2020 pdf External fusion-bonded epoxy coating for steel pipes
1.1  Scope
This Standard specifies requirements and methods of test for external fusion-bonded epoxy (FBE)
coating of steel pipes for protection against corrosion. This Standard covers both single-layer and
multi-layer coating systems.
NOTE 1  Guidelines to purchasers on information that should be supplied by the purchaser and those variables that should or may be agreed upon at the time of inquiry or order are given in Appendix A.
NOTE 2  Line pipe manufactured in accordance with API 5LW may not be suitable for application of FBE coating without requiring additional surface preparation. Surface imperfections in the form of steel slivers, burrs and laminations can cause excessive holidays, resulting in the need for extra surface cleaning, grinding or filing.
NOTE 3  Line pipe manufactured in accordance with API 5LW may require a more stringent straightness specification to allow coating in accordance with this Standard.
NOTE 4  Consideration should be given to strain ageing when specifying line-pipe for FBE coating. Guidance is given in Clause 3.1.3.
Methods for demonstrating conformance with this Standard are given in Appendix B.
1.2  Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document.
NOTE  Documents referenced for informative purposes are listed in the Bibliography.
AS 1627.4, Metal finishing—Preparation and pre-treatment of surfaces, Part 4: Abrasive blast
cleaning of steel
AS 3894.1, Site testing of protective coatings, Part 1: Non-conductive coatings—Continuity testing—High voltage (brush) method
AS 3894.3, Site testing of protective coatings, Part 3: Determination of dry film thickness
AS 3894.5, Site testing of protective coatings, Part 5: Determination of surface profile
AS 3894.6, Site testing of protective coatings, Part 6: Determination of residual contaminants
AS 4352, Tests for coating resistance to cathodic disbonding
ASTM D149, Standard Tests for Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
ASTM D257, Standard Test Methods for DC Resistance or Conductance of Insulating Materials
ASTM D1044, Standard Test Method for Resistance of Transparent Plastics to Surface Abrasion
ASTM D1653, Standard Test Methods for Water Vapor Transmission of Organic Coating Films
ASTM D1921, Standard Test Methods for Particle Size (Sieve Analysis) of Plastic Materials
ASTM D2240, Standard Test Method for Rubber Property—Durometer Hardness
ASTM D2370, Standard Test Method for Tensile Properties of Organic Coatings
ASTM D4060, Standard Test Method for Abrasion Resistance of Organic Coatings for the Taber Abraser
ASTM G11, Standard Test Method for Effects of Outdoor Weathering on Pipeline Coatings
ASTM G14, Standard Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)
ASTM G17, Standard Test Method for Penetration Resistance of Pipeline Coatings (Blunt Rod)
API RP 5L1, Recommended practice for railroad transportation of line pipe
API RP 5L5, Recommended practice for marine transportation of line pipe
1.3  Terms and definitions
For the purpose of this document, the definitions below apply.
1.3.1 abrasion resistant overcoat
ARO
two-layer FBE with an anti-corrosion coating and an abrasion-resistant overcoat
1.3.2 anti-slip overcoat
rough textured outer surface FBE layer applied over a corrosion resistant FBE layer for a variety of
service applications, such as a corrosion resistant underlayer for concrete coated pipe, offshore laying,or other handling applications requiring a higher friction coefficient
1.3.3 batch (FBE powder)
quantity of epoxy powder produced using the same formulation and raw materials of the same source during a continuous production run of not more than 24 hours
1.3.4 bolster
support for coated pipes during transport and storage
1.3.5 coating defect
deleterious imperfection in the coating including disbonded areas, areas of low film thickness
and holidays
Note 1 to entry: Surface anomalies commonly referred to as “blowholes”, “fish-eyes”, “volcanoes” or “craters” are deleterious to the performance of the FBE coating only if they provide a pathway for water through the coating or significantly reduce the coating thickness. These anomalies should not be considered coating defects if they pass the holiday test and are constrained to the top layer of a multi-layer system. Solid lumps/drops, typically from gun tips, are not considered deleterious.