Union

Union (pipe joint/union) is a quick detachable connecting accessory in industrial and sanitary piping systems, consisting of male and female ends, seals, and locking components. It can be easily disassembled and assembled without cutting or welding, and has both firm connection and flexible maintenance.Widely used in industries such as petrochemicals, food and pharmaceuticals, water supply and drainage, and machinery manufacturing, it is installed at nodes with frequent pipeline maintenance (such as pump valve interfaces and instrument connections) to connect two sections of pipes or equipment interfaces, facilitating later pipeline maintenance and accessory replacement, while ensuring the sealing of medium transportation.

Common Types

  • Divided by connection method: threaded flexible joint (suitable for low-pressure pipelines, easy to disassemble and assemble), welded flexible joint (one end welded, one end detachable, firmly sealed), quick release flexible joint (sanitary grade special, clamp locking, tool free disassembly and assembly)
  • Classified by material: Carbon steel flexible joint, stainless steel (304/316L) flexible joint, alloy flexible joint
  • Classified by sealing type: flat gasket sealing flexible joint, conical sealing flexible joint (suitable for high-pressure working conditions)

Structural Advantages & Corresponding Benefits

  1. Double cone sealing locking structure

  • Special point: The male and female ends are precisely matched with conical surfaces, paired with high-temperature and corrosion-resistant sealing gaskets. The locking bolts are evenly distributed and the force is balanced.
  • Result:Excellent sealing performance, adaptable to high-pressure conditions, eliminates medium leakage, and the sealing surface is not easily damaged during disassembly and assembly.

  1. Integrated molding with no dead corners structure

  • Special point: The main body is forged/stamped as a whole, with no weld burrs, smooth inner walls, and a sanitary grade polished to Ra ≤ 0.8 μ m.
  • Result: No residual medium, easy to clean and maintain, suitable for clean/corrosive working conditions, extended service life, and reduced maintenance costs.