Fittings, Tube, Fluid Systems, Separable, Beam Seal, 3000/4000 psi, General Specification For AS85421B

DOI: https://doi.org/10.4271/AS85421B

Issuing Committee: G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies

Publisher: SAE International

Pages: 24

Rationale: This specification is revised to: (1) incorporate allowances for shape fittings to be manufactured from either: near-net forgings or bar-stock/oversized forgings per dimensions specified in AS1376. (2) Include qualification specifics for Nickel Alloy 718 fittings. (3) Include water as a test fluid for the Type IV System high-temperature burst pressure testing. (4) Replace the lot-to-lot destructive testing with periodic testing. (5) Incorporate an Appendix A, which is a Periodic Control Test Summary reporting format. (6) Align minimum “rate-of-rise” for Impulse Testing with AS603 so it is no longer an exception. (7) Include expanded bending-stress tables with additional higher pressure data-point references at lower cycles.