THROTTLE VALVE for CRN
THROTTLE VALVE for CRN
(OP)
Hi All,
I have a 4" NPS 900# flanged throttle valve that is cast out of Chrome Moly steel, I have to get a CRN (Alberta)for it.
Question: Is it necessary to have ASME B16.34 calcs for it? Outside of a pressure test,or FEA, is there another test that will possibly deem it okay for a CRN? It has a 5/8" min wall.
Also, is there an ASME standard design guideline for valves?
Thanks!!!
O
I have a 4" NPS 900# flanged throttle valve that is cast out of Chrome Moly steel, I have to get a CRN (Alberta)for it.
Question: Is it necessary to have ASME B16.34 calcs for it? Outside of a pressure test,or FEA, is there another test that will possibly deem it okay for a CRN? It has a 5/8" min wall.
Also, is there an ASME standard design guideline for valves?
Thanks!!!
O





RE: THROTTLE VALVE for CRN
Extra testing is always a benefit but it may or may not be required. A proof test is one way to ensure that it meets code requirements but would be difficult with flanged ends. The flanges start to leak.
EJL
RE: THROTTLE VALVE for CRN
Not necessarily, but if you did there would be significantly less questioning by your AI/Registrar. Why is it so difficult to be compliant with B16.34?
Q:is there another test that will possibly deem it okay for a CRN?
FEA is not a test it is a design evaluation. More than likely your AI will require you to burst/proof test this item.
I think you're spending to much effort/time trying to avoid simple tried and true methods that will result in a qualified component.
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