Stainless Steel Socket Weld Flange ASME B16.11 PN40 for High Pressure Oil Gas Pipeline and Petrochemical Applications

Socket Weld flanges feature a recessed socket that ensures accurate pipe positioning and creates a smooth internal flow path, reducing turbulence and corrosion. With the weld applied externally, the joint quality is easier to control, making SW flanges ideal for high-pressure, small-diameter pipelines in oil & gas, chemical systems, instrumentation lines, and steam applications.
They address issues such as leakage under vibration, strict dimensional requirements, and welding reliability in high-pressure service.
Our SW flanges offer excellent concentricity, precision-machined sockets, and consistent welding geometry. Manufactured to GOST, ANSI, or DIN standards, they provide stable sealing performance and are suitable for both low-temperature and high-pressure environments.