Solutions for Explosive Decompression

Failure Pattern
Explosive decompression is marked by random short splits or ruptures going deep into the O-ring's cross section. When the O-ring is first removed, the surface may also be covered with small blisters.

Problem Sources
Absorption of gas by the O-ring while operating in high-pressure conditions. Subsequent rapid decrease in system pressure traps gas within the O-ring's micropores, causing surface blisters and ruptures as the gas escapes.

Suggested Solutions

• Increase time for decompression
• Increase material hardness to 80-95 durometer range
• Reduce O-ring cross sectional size
• Specify a decompression resistant material, such as nitrile

O-RING RULE OF THUMB #14

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