AS 3862:2020 pdf free.External fusion-bonded epoxy coating for steel pipes.
2.1 Fusion-bonded epoxy (FBE) powder
The following requirements apply to the composition and properties of FBE powder:
(a) FBE powder shall be a pigmented thermosetting material based on cross-linkable epoxy resins as the binder system.
(b) In case of multi-layer FBE, which utilizes the application of a second (or more) FBE layer over the base FBE anti-corrosion coating, the upper layers may be specially formulated to provide additional mechanical, anti-slip or IJV-resistance properties.
(c) The components of the formulation shall be melt-compounded in an extrusion process prior to being milled to the final powder form.
(d) The powder shall be free flowing and able to be (luidized and spray-applied using conventional electrostatic guns.
(e) When applied to a pre-heated pipe, the powder shalt fuse to form a continuous uniform film. Cure shall be under the action of the residual heat in the pipe, or through a controlled post cure process.
2.2 Abrasive materials
Abrasive materials shall conform to the requirements of AS 1627.4. They shall be free from contamination and contain less than 100 mg/kg chlorides and less than 0.3 % copper.
Abrasives shall be shot or grit, or both, in accordance with AS 1627.4. The particle size shall be such that the blasted steel pipe surface conforms to Clause 3.1.2.
Abrasives for use in field joints shall be silica-free non-metallic or metallic materials in accordance with AS 1627.4. The particle size shall be such that the blasted steel pipe joint conforms to Clause 3.2.5.
2.3 Repair materials
The repair material shall be a two-pack epoxy resin or other suitable material that is compatible with the original coating.
Materials that have been subject to environmental conditions that exceed those specified by the manufacturer, including shelf life, shall not be used.
All repair materials shall conform to the requirements of this Standard, including those shown in Table B.5.AS 3862 pdf download.