What is a SW Flange?
Socket weld flange is designed as the pipe is inserted into it’s bore and single fillet weld on the outside of flange. It is common used for small diameter high-pressure piping system. To some extent, it is smilar to slip on flange.Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.
Specification of Forged Steel Flanges
|Size Range||1/2″- 3″ / DN15 – DN80|
|Pressure Rating||Class 150, 300, 600, 1500|
|Standard||ANSI / ASME B16.5|
|Carbon Steel||ASTM A105 / A105N|
|Low Temp Carbon Steel||ASTM A350 LF2 / LF3|
|Pipeline Steel||ASTM A694 F42 / 46 / 56 / 60 / 65|
|Alloy Steel||ASTM A182 F11 / 12 / 12 / 5 / 9 / 91 / 92|
|Stainless Steel||ASTM A182 F304 / 304L / 304H, 316 / 316L, 310S, 317, 347, 904L|
|Duplex Stainless Steel||ASTM A182 F51, F53, F44|
Advantages of SW flange
Socket weld flange could replace threaded flange, to minimize the risky of leakage.
No need to beveling before welding.
Welding work outside of the pipe, will not penetrate the pipe bore
It is recommended for applications where internal welding operations are particularly difficult. This sock welded construction eliminates internal pockets while avoiding warpage of welding heat and damage to the flange face caused by weld spatter. It has the same internal pressure as the sliding on the flange, and has a better fatigue life.