Overview

The Flexible Double Rubber Ring Socket Spigot Steel Pipe is specially designed with a dual-seal joint system to ensure excellent leak-proof performance. Each pipe end features a socket and spigot connection with two D-shaped rubber rings, forming a reliable and flexible seal under internal pressure.
This advanced connection design enables rapid installation and enhanced sealing reliability, making it ideal for large-scale water supply and municipal pipeline projects.

Key Features & Advantages

1. Superior Sealing Performance:
   The dual D-type rubber rings create a double-layer sealing structure, providing both axial self-tightening and radial sealing. Even under internal pressure, the rubber rings compress outward to reinforce the seal, significantly reducing the risk of leakage.

2. High Construction Efficiency:
   The unique “Water Injection Seal Test” allows single-joint pressure testing directly at the socket connection — requiring only half a bottle of water to verify the seal. No need for full-line pressure testing, improving installation efficiency.

3. High Pressure & Corrosion Resistance:
   Suitable for high-pressure environments. After anti-corrosion coating, each pipe end includes a precision-drilled M10×1.0 threaded test hole, sealed with a copper pressure screw after testing.

4. Flexible Connection & Easy Maintenance:
   The socket-spigot design allows slight angular deflection, accommodating pipeline settlement and minimizing stress on the joint.

5. Precision Manufacturing:
   Drill hole at 205 ±3mm from the pipe end (Φ8.5mm base hole) ensures accuracy and repeatability in every piece.

   
   

Advantages at a Glance

• Dual-seal structure reduces leakage risk

• Quick and simple installation process

• Verified sealing through “water injection gap” testing

• Excellent adaptability for high-pressure and long-distance pipelines

• Proven performance in real-world engineering projects

Why Choose Us

We are a professional manufacturer of large-diameter flexible joint steel pipes in China, offering:

• Custom diameters up to DN3600

• In-house coating and threading facilities

• Complete testing and certification

• Factory-direct pricing and fast global delivery