sealing helium

[sdravida123]

Dear all,

Can helium be sealed with NPT or NPTF threads + teflon tape. I would like to hold the gas at 1 atm for about 2 hours. How is helium different from air in terms of leakage?

 

[IRstuff]

Tape may be iffy. Something like plumber's grease might be more of an efficient barrier. Note that even latex balloons last a couple of hours.

TTFN

 

[iainuts]

I've used Teflon tape for 6000 psi cryogenic helium, as well as just about any temperature and pressure you can imagine. I suggest using the tape.

 

[sdravida123]

Thank you guys. Both the ideas sound like winners.

 

[israelkk]

I have the same experience as iainuts