1992-10-01

Liquid Tight Insulation for High Temperature Aircraft Ducting 921914

Existing hot line insulation failed to provide an adequate barrier to liquid leakage penetration to the hot surfaces beneath the insulation. As a result, combustible fluid leakage posed an unacceptable safety problem to the B-1B aircraft. An existing polyimide and Min-K insulation design was adapted, through the use of leakproof coupling covers, component covers and standoff mount covers, that is highly resistant to fluid leakage penetration. This paper describes the design and testing of a leak resistant insulation suitable for use on heated lines where isolation from external flammable fluid leakage cannot be otherwise provided.

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