Water pressure test
Water pressure test
(OP)
Is it possible to perform a water pressure test on a pipeline without vents and drains?
How do you get the water on highest points?
I know it´s an odd question but the company I work doesn´t want any assessoires on the pipelines, not even flangeconnections(except on pumps and other mech. items.)
Thanks for your replies in advance.
How do you get the water on highest points?
I know it´s an odd question but the company I work doesn´t want any assessoires on the pipelines, not even flangeconnections(except on pumps and other mech. items.)
Thanks for your replies in advance.





RE: Water pressure test
RE: Water pressure test
http://virtualpipeline.spaces.msn.com
RE: Water pressure test
can I get the lines dry after testing?(product reacts with water)
Do I have to pull vacuum too then?
RE: Water pressure test
For many cross-country pipelines, even with large elevation changes, you can fill it with only a vent on the temporary pig trap, i.e. no "extra" ventsi nstalled on the pipeline itself. You run your fill pig with water and with back pressure from your receiver so your pig doesn't run away from the water down a hill and you get a air lock, but other than that - nothing really to it.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Water pressure test
It depends on the dew point you need to dry to and what the pipeline will be used for. Vacuum drying is one method, methanol with pigs is another for higher dew points, compressed dry air, again, it all depends on what dew point you need.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Water pressure test
Hereafter we can blow the line with dry air.
Thanks for your reply.
greetings
RE: Water pressure test
Not sure what size or length your pipelines is, but it's not uncommon to run 200-300 foam pigs after running the bulk dewatering pigs.
But again, the method of drying will depend on what product the pipeline will carry. If it;s crude, bulk dewatering & some swab pigs will do it. If it is gas, you will probably need to do some drying and that will depend on what the gas sales agreement stipulates and what, if any gas treatment is available at the end. That will drive the dew point needed. A dew point requirement of -30F is pretty common for a gas transmission pipleine.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Water pressure test
http://virtualpipeline.spaces.msn.com
RE: Water pressure test
Maybe(methylamines)
Should be in trade, but I'm just a poor designer.
RE: Water pressure test
http://virtualpipeline.spaces.msn.com
RE: Water pressure test
(I knew you people would ask for more details)
RE: Water pressure test
2" huh? I'm not sure what monomethylamine is exactly, but I'd be tempted to blow it out and dry it with just N2.
http://virtualpipeline.spaces.msn.com
RE: Water pressure test
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
RE: Water pressure test
RE: Water pressure test
http://virtualpipeline.spaces.msn.com
RE: Water pressure test
RE: Water pressure test
RE: Water pressure test
It's not allowed to test with a gas higher then 6 bar.
Still got the problem with loosing the water in lowest points.
Got to dry it with air, I think.
Thanks for all your replies.