The ASME B16.5 SW 1500 Class Flange, as a core connecting component for high-pressure, small-diameter pipelines, is widely used in critical fields such as petrochemicals, power generation, and oil and gas transportation. HT PIPE is a reputable supplier and exporter. Our inventory includes pipes, plates, bars, alongside high-quality fittings, flanges, and fasteners. Reach out today for competitive pricing and detailed specifications-no obligation, just expert support.
Connection Method: SW (Socket Weld)
Socket welding refers to a connection method where the flange has a circular socket, and the pipe end can be directly inserted into the socket. The connection and sealing are achieved through a circular fillet weld between the socket and the outer wall of the pipe.
Compared to butt-weld flanges, SW flanges do not require beveling of the pipe, have lower requirements for the machining accuracy of the pipe end during installation, and offer higher tolerance for construction errors.
Compared to threaded flanges, they form a closed sealing structure through welding, eliminating thread gaps and providing superior sealing reliability, making them more suitable for the transportation of high-pressure, flammable, and explosive media.
Core Advantages
High Connection Strength: After the pipe is inserted into the flange socket, the circular fillet weld is subjected to uniform stress, forming a reliable mechanical locking structure with excellent vibration resistance. The damping coefficient is 40% higher than that of butt-weld flanges, effectively suppressing vibrations caused by fluid pulsation.
Reliable Sealing Performance: The socket and pipe fit tightly together, forming a closed annular sealing surface after welding. Using specialized high-pressure gaskets such as metal gaskets further enhances the sealing performance, preventing leakage of high-pressure media, especially suitable for the transportation of flammable, explosive, highly toxic, and highly corrosive media that require extremely high sealing performance.
Convenient and Efficient Installation: No beveling of the pipe is required, and the requirements for the flatness and perpendicularity of the pipe end are low. Precise alignment of the flange and pipe center is not necessary during installation, resulting in high construction tolerance and an installation speed approximately 35% faster than butt-weld flanges.
Cost-Effective: Eliminating the pipe beveling process reduces the installation cost of small-diameter high-pressure pipelines (DN≤50) by approximately 20%. Maintenance is also convenient; the weld is located on the outside of the flange, making inspection and repair easy. If leakage occurs, targeted repair welding can be performed without disassembling the entire flange assembly.
Strong standard compatibility: Strictly adhering to the ASME B16.5 standard, dimensions, tolerances, and markings all conform to globally accepted specifications. Products from different manufacturers are freely interchangeable, facilitating engineering procurement, maintenance, and replacement, and reducing supply chain costs.
ASME B16.5 SW 1500 Class Flange Dimension
