pressure/temperature ratings forged steel valves
pressure/temperature ratings forged steel valves
(OP)
What is the temp rating on a 2" 800# class A105 globe valve
@ 1975psi?
@ 1975psi?
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pressure/temperature ratings forged steel valves
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pressure/temperature ratings forged steel valvespressure/temperature ratings forged steel valves(OP)
What is the temp rating on a 2" 800# class A105 globe valve
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RE: pressure/temperature ratings forged steel valves
I assume that the quoted class 800# should be a missprint, either class 600# or 900#, in accordance with API 6D. Please find below an "extract" from the API6D, ed. April 2008, Clause 7.2:
"Pressure-temperature ratings for class-rated valves shall be in accordance with the applicable rating table for the appropriate material group in ASME B16.34.
Pressure-temperature ratings for PN-rated valves shall be in accordance with the applicable rating table for the appropriate material group in EN 1092-1.
If intermediate design pressures and temperatures are specified by the purchaser, the pressure-temperature rating shall be determined by linear interpolation.
Pressure-temperature ratings for valves made from materials not covered by ASME B16.34 and EN 1092-1 shall be determined from the material properties in accordance with the applicable design standard."
Since the 1975 psi is exceeding the class 600# alltogether, then the temperature rating for 1975 psi in class 900# would be some 235-236 F, group material 1.1, as per ASME B16.34.
cheers,
gr2vessels
RE: pressure/temperature ratings forged steel valves
(1) Class 800 is not a tabulated ASME B16.34 designation. It is an intermediate class that is widely used for socket welding and threaded end valves.
RE: pressure/temperature ratings forged steel valves
-MJC
RE: pressure/temperature ratings forged steel valves
Here is there statement on pressure temperature ratings and a link to the current catalogue.
2.5 Pressure/Temperature Rating
Proper selection of the pressure/temperature rating of the valve shall meet service requirements. If the valve application involves temperatures above 100°F (38°C), then the valve pressure rating at the service temperature must be verified to meet the requirements of the application. If system testing will subject the valve to a pressure in excess of its working pressure rating, then the intended testing pressure and a statement explaining whether the
test pressure is through the opened valve or a differential across the closed valve, should be included in the purchase
specification.
Source Reference for Vogt valves pressure/temperature ratings ASME B16.34 Valves, Flanged, Threaded, and Welded End VVACT0000, Vogt Catalog.
Vogt catalogue page 112 for pressure temperature ratings.
ht
RE: pressure/temperature ratings forged steel valves
Thanks also for the guys to help...
cheers,
gr2vessels