GRE Pipe's Pressure Test
GRE Pipe's Pressure Test
(OP)
How many times a GRE pipe can be under the load of pressure test?
we have a GRE underground pipe that has been under hydrostatic test pressure for 12 times and every time it has failed (we can not find the leak point).
please specify that again and again we can continue to this operation and whether there is any limitation for number of tests or not?
regards
we have a GRE underground pipe that has been under hydrostatic test pressure for 12 times and every time it has failed (we can not find the leak point).
please specify that again and again we can continue to this operation and whether there is any limitation for number of tests or not?
regards





RE: GRE Pipe's Pressure Test
On the other hand, bruised pipe suffers significant delamination at the bruise site with each pressure cycle. I've had your problem with testing buried pipe--I get a fitting leak, depressurize and get a delamination leak on re-test, depressurize and get a new delamination leak in a different place, etc. Generally if you leave GRE in an open ditch for more than a few hours before backfilling you will have bruise problems that may not be leaks for decades. That is the reason that I stopped using GRE for buried lines.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. —Galileo Galilei, Italian Physicist
RE: GRE Pipe's Pressure Test
When you say it "failed", what sort of failure did this equate to?
What sort of joints do you have?
I suspect you've come across what happens when you don't do multiple tests of short sections of GRE before you bury it. Having been involved in a few, I would now be very wary of burying GRE pipelines. The risks are just too high that the pipe will fail if not on installation, then within a short time.
Frankly if you can't find the leaks after 12 goes, then it's time to re assess your unpalatable options.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way