Five‑cloth seven‑oil epoxy coal‑tar pitch anti‑corrosion steel pipe belongs to heavy‑duty fiberglass‑reinforced anti‑corrosion pipeline. Its anti‑corrosion structure is composed of seven coats of epoxy coal‑tar pitch paint and five layers of glass‑fiber cloth wrapped alternately.

The super‑thick composite coating forms an extremely compact, impermeable protective barrier. It features outstanding waterproof, acid‑resistance, alkali‑resistance, salt‑water resistance and anti‑microbial corrosion performance. This heavy‑grade anti‑corrosion structure is specially designed for severely corrosive geological environments, such as saline‑alkali land, swamp, coastal wetland and chemical‑polluted soil.

Spiral‑welded, straight‑seam and seamless steel pipes are available as base materials. Inner‑wall heavy anti‑corrosion treatment can also be customized to realize inner‑outer double‑sided protection.

All finished pipes pass strict inspections of coating thickness, adhesion strength and surface quality before shipment. It is widely used for long‑distance sewage trunk pipelines, industrial corrosive wastewater conveyance, port and wharf foundation anti‑corrosion, underground pipelines in high‑corrosion‑risk zones.