Hydrostatic test fitting blew off on a 200 psi natural gas line in Gary

Was pressure testing a 12-inch main yesterday and a coupling let go at 180 psi. Sent the fitting flying across the ditch. What kind of couplings do you guys trust for hydro tests?

2 comments

2 Comments

terryh2014d ago

Those Dresser couplings are usually solid but I heard from a crew in Chicago that the Victaulic FireLock stuff has been failing more lately during hydro tests. Might be worth checking the gasket rating before you run pressure. I switched to Smith-Blair all stainless for anything over 100 psi after seeing a 4-inch blowout last year. That coupling flying across the ditch is no joke, glad nobody got hit.

piper91213d ago

Switched to Smith-Blair too after a scary pop. @terryh20 you seen any issues with the zinc coated ones?