Introduction to Flanged Bushing

Socket welding flange, also known as SW flange, is a type of flange that is焊接 to one end of a steel pipe and connected to the other end with bolts.

The look of the socket welding flange is similar to that of the slip-on flange, but the difference lies in the size of the neck insertion into the pipe for the socket welding flange.

Model and Specifications

DN15-DN50

Pressure Rating

PN10~PN100

Common Materials

Carbon Steel Flanges: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70

Stainless Steel Flanges: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8

Alloy Steel Flanges: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ

Sealing Surface Type

Rounded Face (RF), Milled Face with Molding (MFM), Tongue and Groove (TG), Ring Joint (RJ)

Compliance Standards

HG/T20592-2009

ANSI B16.5

HG20619-1997

GB/T9117.1-2000—GB/T9117.4-200

HG20597-1997

Connection Type

One end of the steel pipe is inserted into the flange's inner diameter for welding, while the other end is secured with bolts and nuts.

Production Process

Aoxy furnace blanking, overall forging or finished forging press cutting shaping, high-precision CNC lathe turning, CNC radial arm drilling;

Procurement Recommendations

1: Suggest purchasing from a reputable flange manufacturer, which should have a certain scale of production.

2: Manufacturers of flanges need to provide material inspection reports and related documents for socket welding flanges.

3: Flanged socket welds must have corresponding specification and model embossed marks and identification.