A double-seal connection is a connection method that achieves pipe interface protection through two independent sealing structures. The inner seal blocks media penetration, while the outer seal provides secondary protection. Common forms include double-seal ring compression fitting, double-seal flanges, and rubber ring + electrofusion double seals.
Dual protection, zero leakage risk: When the inner seal fails due to impact or aging, the outer seal effectively blocks residual water flow, achieving zero leakage at the interface.
Strong seismic and impact resistance: Combined with a three-locking ring structure, it significantly improves connection strength and can withstand water hammer impact and seismic loads.
Integrated corrosion protection and sealing: The heat-conducting groove design of the double-seal flange protects the plastic coating from welding damage, achieving dual protection against corrosion and sealing.
Water supply and fire protection pipelines in high-rise buildings; pipelines transporting corrosive chemical media; pipelines in earthquake-prone areas and under high vibration conditions;
Thin-walled Stainless Steel Ring-Clamp Double-Sealed Pipe Fittings (T/CECS 10432-2024);
Steel-Plastic Composite Pipes and Fittings for Fluid Transportation (GB/T 28897-2021);
Technical Specification for Trenchless Repair and Renewal Engineering of Urban Water Supply Pipelines (CJJ/T 210-2014).
The connection type is semi-rigid/flexible, with slight displacement compensation capability; the sealing performance far exceeds that of single-seal structures, and the long-term operation and maintenance cycle can be extended to more than 8 years.
Basic definition: Butt weld connection is a connection method in which the end face (or bevel face) of the pipe is directly aligned and the base material and welding material are fused together to form a continuous metal fusion zone through processes such as gas metal arc welding, submerged arc welding or argon arc welding. It is also known as bevel weld and is one of the strongest load-bearing connection forms in pressure pipelines and steel structures.
Basic Definition: Flange connection is a mechanical connection method that uses pre-fabricated flanges on the pipe ends, along with bolts and gaskets, to connect pipes. Plastic-coated steel pipes often employ a "pre-welded flange + post-coating" process to avoid damage to the anti-corrosion coating caused by welding.
Basic Definition: Grooved connection is a connection method that uses a grooving machine to process annular grooves at the pipe ends, combined with clamps and rubber sealing rings to achieve a tight seal. It has nearly a century of engineering application history.
Basic Definition: Socket connection is a specialized flexible connection method for plastic-coated steel pipes. It involves interlocking pre-fabricated "sockets (with grooves)" and "spigots (with adaptable protrusions)" at the pipe ends, relying on a rubber sealing ring for sealing, without damaging the internal or external anti-corrosion coating of the pipe.
Basic Definition: Press-fit connections use specialized crimping tools to radially press the socket portions of pipes and fittings together, creating a tight seal. This, combined with an O-ring seal, achieves a secure connection. This method is widely used in thin-walled metal piping systems.
A double-seal connection is a connection method that achieves pipe interface protection through two independent sealing structures. The inner seal blocks media penetration, while the outer seal provides secondary protection. Common forms include double-seal ring compression fitting, double-seal flanges, and rubber ring + electrofusion double seals.
A process in which two or more similar or dissimilar materials are joined together through atomic or molecular bonding and
A process in which two or more similar or dissimilar materials are joined together through atomic or molecular bonding and
A concentric reducer is a tapered pipe fitting with coinciding centerlines at both ends, allowing for a coaxial transition between pipes of different diameters. Also known as a concentric reducer, it is a specialized fitting for diameter changes in piping systems.
Bimetallic connection is a specific connection method for bimetallic composite pipes. It achieves simultaneous bonding between the base steel pipe and the outer anti-corrosion and wear-resistant metal layer through mechanical bonding, welding, or a special structural transition.
A double-seal socket connection features two independent sealing rings built into the pipe socket. The spigot end is directly inserted into the socket, and a continuous seal is formed by the compression of the two sealing rings. This is a flexible socket connection that effectively protects the internal and external anti-corrosion coatings of the pipe from damage.
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