What is C.I.R.? A type of rubber?

Andy22 · Jul 8, 2005

I have a drawing that specifies 1/8" thick C.I.R. for a flange gasket material. I suspect that it is actually natural rubber but what does C.I.R. stand for?

berti · Jul 12, 2005

Hi andy22,

only a guess. If you think it it natural rubber actually then C I R could -could !!- mean cis isoprene rubber which is the synthetic twin of NR.

HTH Berti

aholloway · Jul 27, 2005

Per ASTM D1418 (Vol 9.0) CIIR is chloro-isobutene-isoprene (chlorobutyl). Maybe someone left out the second "I"?

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

What is C.I.R.? A type of rubber?

Andy22

Mechanical

berti

Chemical

aholloway

Materials

Similar threads

Part and Inventory Search

Sponsor