Yea Otto, I've been on a crew at a refinery that used nitrogen as the test medium. Because of the potential energy inside of the pipe we had to rope off a specific distance away from it.
The engineer equated the energy in the pipe to a certain amount of TNT.

An engineer will decide the test pressure. He bases his calculations on code requirements from ASME (American Society of Mechanical Engineers). They are the regulatory body responsible for pressure vessel and piping (boilers, air receivers and the like as well as piping for steam, air, nitrogen, aci...

That's why water is used. Unlike a gas (compressed air, nitrogen etc) you can't compress water. Inside a vessel the water will act as a solid and when released to the atmosphere it sprays harmlessly for a split second and drops to atmospheric pressure. If the same was done with a gas...........well ...

A project the first yr welding apprentices completed. 1 1/2"pipe inside 2" pipe welded in the 2,5 and 6f positions. This mock up is used to simulate socket weld fittings. Welded with 3/32 6010 and 7018. This pipe spool was then hyroed to 650 psi. All 14 apprentices passed with one project ...

Just wanted to let you you know how much I appreciate your videos. Bought the complete video package set and am more than satisfied with the purchase. Been welding 20 yrs, last 10 on pipe and can always use suggestions to improve my skill set. These videos are interesting, hands on and enjoyable. Ke...

How do you fellas weld pipe to plate, when the plate is in a vertical position and the pipe axis horizontal. Or a socket weld joint when both fitting and pipe are in a horizontal axis? Specifically stringer beads with stick.
Thanks Sftyvlv