Brief introduction: 

 The plug-in welding flange refers to the flange inserted into the flange ring ladder at the end of the pipe and the outer flange. There are two types of neckless and neckless. The flange with neck tube has good rigidity, small welding deformation, and good sealing. It can be used in situations with a pressure of 1.0~10.0MPa. The B-type flange for containers is also a plug-in welding flange, which is used in occasions with high sealing requirements. When designing, the plug-in welding flange can be checked according to the integral flange. 

Sealing surface form: protrusion surface (RF), convex surface (MFM), tenon groove surface (TG), ring connection surface (RJ). 

Material: carbon steel (carbon steel): 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 (stainless steel): ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8; 

Alloy steel (alloy steel): ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A3 35P22, St45.8/III; 

Manufacturing standards: ANSI B16.5, HG20619-1997, GB/T9117.1-2000-GB/T9117.4-200, HG20597-1997. 

Connection method: flange nut, bolt connection. 

Production technology: professional overall forging, forging manufacturing, etc. 

Processing methods: high-precision CNC lathe turning, ordinary lathe precision turning, argon arc welding and other processing. 

Scope of application: boiler pressure vessel, petroleum, chemical industry, shipbuilding, pharmaceutical, metallurgy, machinery, stamping elbow food and other industries; 

Plug-in welding flange: often used in pipes with PN≤10.0MPa and DN≤40.