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.
High interface strength, good overall rigidity, and strong pressure resistance; double-layer metal synchronous sealing inside and outside, excellent corrosion resistance and leakage prevention performance; high temperature resistance, impact resistance, and wear resistance, adaptable to complex working conditions; stable interface structure, not easily deformed or delaminated;
Petroleum, chemical, and power transmission pipelines for corrosive media; mining, metallurgy, and other high-wear, high-pressure working conditions; high-temperature steam and high-temperature fluid transmission pipelines; long-distance water, oil, and gas transmission composite pipeline projects;
GB/T 28897 "Steel-Plastic Composite Pipes and Fittings for Fluid Transportation"; GB/T 18704 "Composite Steel Pipes"; GB 50268 "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering"
Rigid connection, strong overall interface integrity, no significant expansion and contraction compensation capacity; connection strength close to the pipe body, reliable sealing, suitable for medium and high pressure systems; construction mostly uses welding or special pipe fittings for connection, good overall interface integrity.
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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