09/21/2012

Saint-Gobain Performance Plastics N.V.

OmniSeal® for rapid gas decompression applications in high-pressure services

OmniSeal® spring-energized seals
Rapid Gas Decompression (RGD) is a familiar problem in the oil & gas industry and other high pressure gas applications. It has been reported in all types of fluid handling devices, including valves, blow-out preventers.

RGD is commonly known as explosive decompression, an operational condition during which the applied system pressure is quickly released, resulting in the expansion of absorbed gas damaging elastomeric seals. However, the prefix “explosive” can be misleading, since decompression damage can occur even when pressure is let down gradually over many hours.

Where no suitable elastomeric seals are found for a rapid decompression application, due to their limitations in operating pressure, temperature and chemical resistance, then Saint-Gobain OmniSeal® spring-energized PTFE seals should be considered.
Our Fluoroloy® custom formulated blends and alloys including PEEK and Fluoropolymers are classified as plastic, with low resilience and elasticity.

Saint-Gobain Fluoroloy® materials do not suffer from rapid decompression damage because of its higher strength (over 100MPa) than elastomers (usually well below 50MPa).