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Helium permeability through PVF, Nitrile, Silcone at 350degC

Thread starter LesT
Start date Jan 13, 2003

Status: Not open for further replies.

Jan 13, 2003

LesT

Mechanical

I require an inflatable pipe plug for temporary sealing a 1m diameter pipe pressurised with 1 bar Helium at about 350 deg C or lower. Can someone point me in the right direction for a possible supplier or recommend some materials to use. Permeability tables of Helium at these temperatures for NRHB, Silicone, PVF etc will help. What should the inflatable length be to ensure a proper seal?