For Huangling spiral steel pipe 406 * 7, Huangling spiral steel pipe 355 * 7 Huangling spiral steel spot 133230707611 Product Name: spiral steel corrosion insulation 2. Outer diameter: 219 mm -4000 mm Thickness: 6 mm - 32 mm Length: 12 meters -18 meters or according to customer needs. trademark: Wuzhou 6 Standard: ANSI, GB, petroleum, petrochemical, German standard, API 5L, API 5CT Material: Q235A, B, 16Mn, API X42-X70 GB L245-L485 9. Application: petroleum, chemical, electric power, gas, heat, water and other long-distance transmission line 10. corrosion insulation: 2PE/3PE 2PP/3PP epoxy anti-corrosion, epoxy coal tar pitch anticorrosive steel pipeline can afford single-layer and double-layer fusion bonded epoxy powder (FBE), double-layer polyethylene (2PE) and three polyethylene (3PE), double polypropylene (2PP), and three Polypropylene (3PP), coal tar epoxy pipe coating, polyurethane Preformed directly buried pipe insulation, black and yellow jacket pipe insulation, IPN8710 polymer anticorrosive coating anticorrosive epoxy anti-corrosion pipe, high density polyethylene anti-corrosion pipe, cement mortar lining anti-corrosion Preformed directly buried pipe insulation antisepsis / IPN8710 drinking water pipeline wall project. And according to international and domestic standards, the production of carbon steel, alloy steel, stainless steel of various specifications elbow, reducer, tee, cross, pipe cap and pipe fittings products. API 5L, ISO9001: 2000, ISO14001, OHSAS18001, API SPEC 5L such as a series of related certification.