Product Description

Introducing our groundbreaking Bimetallic Welding Joint Plastic-Coated Steel Pipe, the ultimate solution for critical large-diameter buried pipeline applications. This high-performance composite pipe integrates a superior internal/external plastic coating with a revolutionary connection method.

The core innovation lies at the pipe end: a high-quality 304 or 316 stainless steel ring is metallurgically bonded to the carbon steel pipe body via advanced bimetallic welding technology. This process creates a seamless, permanent transition where the structural strength of carbon steel meets the exceptional corrosion resistance of stainless steel. Designed for direct butt-welding in the field, it eliminates the need for failure-prone flanges and bolts, delivering unmatched reliability and longevity for demanding underground environments.

Product advantage

1. Unrivaled Corrosion Resistance at the Joint

Eliminates the Weak Point: Traditional coated pipes are vulnerable at the cut-back end. Our stainless steel liner completely encapsulates this area, providing permanent protection against electrolyte ingress and underfilm corrosion, ensuring the connection lasts as long as the pipe itself.

Withstands Harsh Media: The 304/316 stainless steel liner offers excellent resistance to a wide range of water types, weak acids, alkalis, and corrosive ions, making it ideal for challenging environments like coastal, saline-alkali, or acidic soils.

2. Superior Structural Integrity & Zero Leakage

100% Leak-Free Seal: A fully welded butt joint provides a permanent seal far superior to gasket-dependent flanged connections, essential for potable water, valuable fluids, and leak-sensitive applications.

3. Exceptional Mechanical Strength

The welded joint strength meets or exceeds the pipe body's strength, offering excellent resistance to tension, bending, vibration, ground settlement, and external impact.

4. Significant Lifecycle Cost Savings

Reduces Installation Costs: Saves on expensive flanges, bolts, gaskets, and associated labor for bolt tightening.

Minimizes Maintenance: Extreme reliability translates to near-zero maintenance, avoiding the exorbitant costs of excavation, repair, and operational downtime caused by corroded flange leaks.

5. Saves Space & Weight

The compact welded joint requires less trench space compared to flanged assemblies and reduces overall pipe weight for easier handling and transport.

6. Ultra-Low Friction Loss

The smooth internal epoxy coating combined with the seamless transition of the stainless steel liner ensures minimal flow resistance, reducing pumping energy costs significantly over the system's lifetime.

7. Preserves Water Quality

Both the stainless steel and epoxy coating are inert materials, preventing secondary contamination and ensuring the delivery of clean, safe potable water.

8. Installation Efficiency & Compatibility

Standardized Welding Procedure: Prepared bevel ends allow for quick and secure butt welding by certified welders using standard equipment (TIG/MIG), ensuring consistent, high-quality field joints.

9. System Compatibility

Municipal Water & Wastewater: Primary water supply networks, reclaimed water lines.

Product Application

1. Water Conservancy Projects: Large-scale water transfer pipelines, reservoir discharge lines.

2. Industrial Systems: Power plant cooling water, chemical process water, mining slurry transport.

3. Oil & Gas: Buried firewater lines, utility water pipelines.

4. Special Environments: Pipelines in coastal areas, saline-alkali soils, and other highly corrosive conditions.