Large diameter steel pipe refers to the tube whose outside diameter is more than 1000mm, steel ingot is made of perforated or solid billet through the capillary tube, and then hot rolled, cold-rolled or cold call is made.

Large diameter steel pipe is coated large diameter spiral welded pipe and high-frequency welded pipe made of plastic coating on the basis of the maximum diameter of the nozzle.

1200mm, can be coated with polyvinyl chloride according to different needs (PVC), polyethylene (PE), epoxy resin (EPOZY) and other various properties of plastic coating, good adhesion, corrosion resistance, can be resistant to acid , alkali and other chemical corrosion, non-toxic, does not rust, abrasion resistance, impact resistance, permeability, smooth pipe surface, do not adhere to any substance that can reduce transmission of resistance, increase traffic and transportation efficiency and reduce transport pressure loss. Coating solvent-free, no leaking substances, and therefore does not pollute the transmission medium, thus ensuring purity and hygiene of the fluid can be used interchangeably in the range of hot and cold cycles -40 ℃ to +80 ℃, not aging, no cracks, and thus can be used in harsh environments such as cold zone. Large-diameter steel pipes are widely used in engineering fields applied water, natural gas, petroleum, chemical, pharmaceutical, telecommunications, power, marine and other.