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Socket Weld Flanges

Socket weld flanges are similar in both dimensions and applications to slip on flanges. The major difference is that socket weld flanges have an internal recess in which the pipe sits. This then gives a better flow of fluid through the piping itself. As a rule, socket weld flanges are more expensive than slip on flanges due to the extra machining required to manufacture them.

Socket weld flanges also tend to be used on smaller pipelines, typically ½”NB to 3”NB for 150lb – 600lb rated flanges and ½”NB to 2.1/2”NB for 1500lb rated flanges.


We also supply and stock:

  • Billets cut from round bar
  • BSP/NPT/SW Fittings
  • ASME SA269/249/270/A213 tubes

Materials include:

Stainless steels Duplex Nickel alloys Carbon steels Low alloys
316/L F51/S31803 200 A105 F5
316/H F51/S31803 400 A350 LF2 F9
316/Ti F53/S32750 K500 F11
304/L F55/S32760 600 F22
304/H 625
321 718
347 800/H
310 825
317/L Nimonic