Valve impact test
Valve impact test
(OP)
Dear friends,
When does a valve need impact test? What is its standard?
When does a valve need impact test? What is its standard?
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RE: Valve impact test
Petrotrim Services
www.petrotrim.com
RE: Valve impact test
RE: Valve impact test
Patricia Lougheed
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RE: Valve impact test
vpl: Hello Patricia, I have always appreciated your straightforward and good answers. My crystal ball says: Wenever the enduser or (local) authorities require, most often by reason of (high) pressure class or special service and/or consequences if failing, and tested to the appropriate (local) standard.
Eg.: Another way to say what you already have stated.
RE: Valve impact test
thanks friends.
RE: Valve impact test
A352 Grade LCB (to -50°F/-46°C)
A352 Grade LC1 (to -75°F/-59°C)
A352 Grade LC2 (to -100°F/-73°C)
RE: Valve impact test
RE: Valve impact test
Worldwide seen (not only where ASME might be applicable) special services (for instance turbine inlet valves or other applications for hydroelectric powerplants) might be required by local authorities to be tested to prove high enough strength. Different material strength tests may be required.
Same is certainly true for other services or applications.
In general the rule is as Duwe states, but not always!. And yes: buy after application!
RE: Valve impact test
RE: Valve impact test
Petrotrim Services
www.petrotrim.com
RE: Valve impact test
I have seen some customer cryogenic valve specs that do have requirements for impact testing assembly welds
RE: Valve impact test
If the standards is ASME VIII Division 1 already used for calculation of valves bodies, refer to fig UCS-66M to check if your material shall be impact tested or not.
I hope that will help you.
RE: Valve impact test
RE: Valve impact test
One needs to ask the reasoning why materials need impact testing. This will lead one to the requirements.