V. Krishna:
Assuming that the proper valves, fittings and other components of a piping system are properly selected, they will have much higher pressure ratings than the pipe or especially the connections. Therefore those components will not fail a pressure test. The purpose of the pressure test to to verify integrity and pressure rating of the system. The pressure test conditions of individual components should be higher. Follow B31.3.
... Bruce D. Bullough ...
Lead Process Engineer
Foth & Van Dyke and Associates, Inc.
8550 Hudson Boulevard North, Suite 100
Lake Elmo, MN 55042
Phone: (651) 288-8598 Fax: (651) 288-8551
http://www.foth.com
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"umesh k.n." <umesh_kn@yahoo.com>
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12/21/2006 08:48 PM
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Re: [PipingDesign] Pneumatic test for llines at site
Generally it is common practice to exclude valves from Pipeline pressure
testing.
If at all you want do a pressure test for valves, similer spec valves
(i.e. same class & material) shall be connectd together (Flange to flange)
and do the pressure test as recommended by the valve vendor or as per
project spec.
Rgs,
Umesh Ken.,Senior Piping Specification Engineer, Alcan Engineering Pty. Ltd., Brisbane, QLD, Australia
Favorite saying:
"Our lives begin to end the day we become silent about things that
matter"? ........... Dr. Martin Luther King, Jr
Hi,
As per ASME B 31.3 the pneumatic test pressure sahll be 110% of line
design pressure.But the valves to be pneumatically tested are tested at
max of 7 bar as per API 598.In this case what will be the test pressure
for piping.
Can somone explain.
Thanks & Regards
V.Krishna
Piping
66945816
.
[Non-text portions of this message have been removed] Received on Fri Dec 22 09:03:00 2006
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