ECN Forum Forums General Topics of the Trade General Discussion Area Threading 2 1/2" Gal pipe.

I was taught a very long time ago that the reason for tapering the threads is that it allows explosive gases to cool as they are forced out thru the threads if there is an internal explosion in a rigid conduit in a hazardous enviroment. This info may not or may be true, I have no idea. Never researched it at all.