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A flange is designed to connect sections of pipe or tube, or to join the pipe or tube to an assembly such as a pressure vessel, valve or pump. Flanges are joined by bolting, and sealing is completed with the use of gaskets and other sealing methods, and fixed to the piping system by welding or threading. 

A comprehensive range of Table D and Table E flanges to AS 2129, and forged flanges to ASME standards in ratings of class, are stocked by Prochem throughout Australia in sizes DN 15 (NPS 1/2″) though to DN 400 (NPS 16″).

Larger sizes to DN 1500 (NPS 60″) and ratings to Class 2500 are also available through our worldwide network of quality approved mills and stockists.

Standard stocks include 304L and 316L stainless steels, with many other materials available on request including Cr-Mo, low temperature alloys, nickel based alloys and duplex grades. All flanges can be supplied complete with material certificates in strict accordance with the applicable standards, under the control of Prochem’s ISO 9001:2015 quality assurance program.

Flange Facings

The most common types of flange facings are:

Other facings include:

  • Ring Joint (RTJ)
  • Tongue and Groove
  • Male and Female (Spigot and Recess)
  • O-Ring Groove (O-Ring Spigot and O-Ring Groove)


Flanges Weights Dimensions and Working Pressures


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