Coupling Assembly, V-Retainer, High Pressure High Temperature, Pneumatic Tube
AS1895E
This SAE Aerospace Standard establishes the requirements for a V-retainer coupling, flanges, and seal suitable for joining high pressure and high temperature ducting in aircraft bleed air systems. The rigid coupling joint assembly, hereafter referred to as “the joint,” shall operate within the temperature range of -65 to +1200 °F.
Rationale:
AS1895/1, /4, /7, /20, /22, and /23 have QPL requirements manufacturers are having difficulty qualifying as the specification is written. The seal (/7 and /23) test requirements were interpreted differently for the seal manufacturers and the QPG. The specification needs to define the way to qualify the seals and clarify coupling qualification. The bolt callout in the procurement spec and the coupling parts standards versus the AS4108 spec needs to be consistent. Define rotational movement for the torsional moment tests and allow equivalent axial plug load test for ATP.
Related Topics:
Corrosion resistant alloys
Heat resistant alloys
Nickel alloys
Also known as: SAE AS 1895
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