FTMS / ASTM Chamber Fabric Testing
Large Corporation needs Materials Laboratory to test chamber fabric to the following standards: FEDERAL STANDARD: TEXTILE TEST METHODS FTMS 191, Method 5460 or alternatively, ASTM D1434-82, Procedure V Standard Test Method for Determining Gas Permeability Characteristics of Plastic Film and Sheeting
This is the TSO standard requirements for helium permeability of chamber fabric for your reference.
Materials used in the construction of the air holding cell shall have a maximum permeability to helium of 5 L/m2 in 24 hours at 77 °F (25 °C) when tested in accordance with 5.6.3.
The permeability shall be tested in accordance with the Permeability test procedure in FTMS 191, Method 5460 or alternatively, ASTM D1434-82, Procedure V may be used. The permeameter shall be calibrated for the gas used.
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