Socket weld flange

What is a socket weld flange?

Socket weld flange(SW flange) is similar to the slip on flange(SO flange),but it has a block in the inner bore(which name is socket) to accept pipe or fitting,fillet welding is done from outside on the pipe.And the socket thickness is common same with the pipe thickness.Socket weld flanges are used specially for small sizes and high pressure piping systems.

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Specifications of socket weld flange:

ANSI/ASME standard:

  • ANSI/ASME B16.5 class 150 socket weld flange dimensions: ½”-3″
  • ANSI/ASME B16.5 class 300 socket weld flange dimensions: ½”-3″
  • ANSI/ASME B16.5 class 600 socket weld flange dimensions: ½”-3″
  • ANSI/ASME B16.5 class 1500 socket weld flange dimensions: ½”-2½”

JIS standard:

  • JIS B2220 5K socket weld flange dimensions: 10A-80A
  • JIS B2220 10K socket weld flange dimensions: 10A-80A
  • JIS B2220 16K socket weld flange dimensions: 10A-80A
  • JIS B2220 20K socket weld flange dimensions: 10A-80A

Materials of socket weld flange:

Carbon steel socket weld flange:

  • ASTM A105 socket weld flange
  • ASTM A350 LF2 socket weld flange
  • SS400 socket weld flange
  • P235GH socket weld flange
  • P250GH socket weld flange
  • C22.8 socket weld flange
  • Q235 socket weld flange

Stainless steel socket weld flange:

  • ASTM A182 F304 socket weld flange
  • ASTM A182 F304L socket weld flange
  • ASTM A182 F316 socket weld flange
  • ASTM A182 F316L socket weld flange
  • ASTM A182 F321 socket weld flange
  • ASTM A182 F347 socket weld flange

Alloy steel socket weld flange:

  • ASTM A694 F42 socket weld flange
  • ASTM A694 F46 socket weld flange
  • ASTM A694 F52 socket weld flange
  • ASTM A694 F56 socket weld flange
  • ASTM A694 F60 socket weld flange
  • ASTM A694 F65 socket weld flange
  • ASTM A694 F70 socket weld flange
  • ASTM A182 F5 socket weld flange
  • ASTM A182 F9 socket weld flange
  • ASTM A182 F11 socket weld flange
  • ASTM A182 F12 socket weld flange
  • ASTM A182 F22 socket weld flange
  • ASTM A182 F91 socket weld flange
  • Sealing face of socket weld flange:

    Socket weld flanges are commonly supplied with a raised face(RF),flat face(FF).When a raised face is necessary for socket weld flanges,the standard height of the face is 1/16″ when the flanges pressure is less than class 400.When socket weld flange is class 400 and up,the standard socket weld flange raised face height is 1/4″.