Black ERW Steel Pipes

Black ERW Steel Pipes ERW pipes means Electric Resistance Welded Pipes. ERW steel pipes and tubes are used for various engineering purposes,Website:, in pipelines transmitting water, gas, and oil and in constructions such as fencing, scaffolding, etc. Our ERW steel pipes and tube are available in divers wall thicknesses and diameters. We are among the leading manufacturers and suppliers of ERW pipes and tubes in China, welcomed by customers in many countries of the world. Quality Standard:ASTM A53 Standard Specification for Pipe, Black and Hot-Dipped, Zinc-Coated, Welded Steel Pipe.API 5L Line PipeEN10217 Welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature propertiesSteel Grade:BS:1387, EN10217:S185, S235,S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44, ST52ASTM A 53: Gr. A, Gr B, Gr C, Gr.DAPI 5L: A, B, X42, X46, X52Size:Outer Diameter: 18mm-610mm (1/16"-24")Wall Thickness: 1.24mm-25mmEnd: Plain or beveled ends.Surface: Lightly oiled, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy, Fusion Bond Epoxy, 3-layers PE)Manufacturing Process:1. Uncoiling 2. Strip Leveling 3. End Cutting 4. End Shearing and Welding 5. Accumulator 6. Forming 7. Induction Welding 8. Seam Heat Treatment 9. air/Water Cooling  10. Seam/Body UT 11. Sizing and Straightening  12. Cutting 13. Visual and Dimension Inspection 14. Hydrostatic Test 15. End Facing and Chamfering  16. Flattening Testing 17. Marking 18. Length-Measuring and Weighing 19.  Seam/End UT 20. Coating  21. Storage

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