Large‑diameter 3PE anti‑corrosion steel pipe is mainly made of spiral‑welded steel pipe, also available with straight‑seam and seamless steel pipe substrates. Complete large‑size specifications can meet the demands of long‑distance water diversion, municipal water‑supply, oil‑gas transmission and large‑scale buried pipeline projects.

The three‑layer polyethylene (3PE) anti‑corrosion coating consists of fusion‑bonded epoxy primer, adhesive layer and high‑density polyethylene outer sheath. It features excellent corrosion‑resistance, low water‑vapor permeability, impact resistance and stable mechanical performance, which effectively protects large‑diameter steel pipes from underground soil and chemical corrosion.

We supply both standard‑grade and reinforced‑grade 3PE anti‑corrosion options according to actual geological and soil‑corrosion conditions. Produced strictly in accordance with GB/T 23257‑2017, every pipe undergoes full inspection before shipment, and mill‑test certificates are provided. Widely applied in long‑distance water transfer, urban water‑supply, sewage drainage, cross‑river pipeline and other large‑scale infrastructure projects.