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Flange Bolting / Cryogenic Carpenter 455

With large temperature differences seen in cryogenic applications, the use of Belleville disc springs can play a significant role in the reduction of leaks. Materials with good cryogenic properties are PH (precipitation hardening) and Carpenter Technology stainless steels.
(1) Torque values for sizes 1-1/8" and larger are based on the
8-pitch thread series for flanged piping.




Cryogenic Carpenter 455 flange bolting is available at 15,000 and 25,000 psi bolt stress.

The material for the part numbers shown is Carpenter Custom 455 Stainless Steel. Other materials available include the following.

• 17-4 PH Stainless Steel
• 17-7 PH Stainless Steel

Dimensions for other materials vary to achieve proper bolt stress.