8" and Larger Globe Valve Not Allowed in Spec
8" and Larger Globe Valve Not Allowed in Spec
(OP)
Hi All,
I have a piping spec that does not allow 8" or larger globe valves and insists on a v-ball or gate valves as an alternative. I'm not sure the reason for this and am wondering if anyone has any insight? Below are the spec conditions:
Flange rating: 600# (max pressure: 10,210 kPag @ 38 deg C)
Code: ASME B31.3
Temp range: -45 deg C to 260 deg C
Service: Low temp sour process (NACE)
Corrosion Allowance: 3.0 mm
Thanks
I have a piping spec that does not allow 8" or larger globe valves and insists on a v-ball or gate valves as an alternative. I'm not sure the reason for this and am wondering if anyone has any insight? Below are the spec conditions:
Flange rating: 600# (max pressure: 10,210 kPag @ 38 deg C)
Code: ASME B31.3
Temp range: -45 deg C to 260 deg C
Service: Low temp sour process (NACE)
Corrosion Allowance: 3.0 mm
Thanks





RE: 8" and Larger Globe Valve Not Allowed in Spec
You need to do some real research on this issue.
This includes an actual quote from a Valve supplier.
Class 600 10" Globe Valve with all your other data vs. a "V"Ball or other valve fit for your service and duty.
Sometimes its possible to do all the right things and still get bad results
RE: 8" and Larger Globe Valve Not Allowed in Spec
A V-ball has none of these issues and are very stable in larger diameters.
A gate valve is not a throttling device and that advice from the standard should not be followed.
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: 8" and Larger Globe Valve Not Allowed in Spec
RE: 8" and Larger Globe Valve Not Allowed in Spec