Plant Operations/Maintenance/ice plugs

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Question
Is it allowable to use ice plugs to block a pipe for hydrostatic pressure test? My pipe is an 8" stainless steel pipe, 304L

Answer
Hi Virgiiu,
 Yes, you can use this method to do your test. Find a company that uses liquid nitrogen to freeze it and have them hold the plug until you are done your testing. They will need to know the system pressure, Temp. and how long you need them to hold the plug for so they can have the right amount of liquid nitrogen delivered.
   Any more questions, just ask.
         Thanks, Fred

Plant Operations/Maintenance

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Fred Thibodeau

Expertise

Controlled pipe freezing: I can answer questions about how pipe freezing with liquid nitrogen can help you isolate a section of pipe for repairs under full system pressure without the need to shut down or have to drain the system. Water, oil, chemicals can be frozen safely to allow your maint. department to do the needed repairs.Freezing can be done on steel, copper, cast, PVC pipe, etc. I have frozen pipes at 1500 lbs pressure and up to 24" in Dia.

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Past/Present clients
NSTAR,Com energy,Sithe Energy,Boston Edison,Electric Boat, Mead Paper,etc. Many mech. contracting companys

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