One of the valve specification states
"Additional supplementary test F22 (Antistatic design test) requirements by the MANUFACTURER with test sampling as agreed between CONTRACTOR, COMPANY and VENDOR and to be specified in the purchase requisition, for high performance triple offset butterfly...
PeterIgg,
The standard is API 607.
Being their guinea pig - definitely NOT. I have already raised this concern with procurement as finally passing the test MAY take time and our requirement as stated above is URGENT.
Dear All,
One of the valve vendor quoted a 24" Ball valve for HC gas service. We asked for the fire test certificate. We required the valve (as normally happens [smile]) urgently. The vendor (judging our urgency) has come up with the "Solution" - arranging a fire test certificate will take 8 to...
Pressure relief valves not to be replaced with the check valves, if the pressure on upstream side is greater than the downstream of check valve, there shall always be flow. PRVs are normally joined to flare headers or blowdown systems (meaning whatever passes through PRVs is waste and shall be...
Danlap,
What do you mean by pressure buildup. When the pressure on downstream side of the check valve is more, the valve has to shut down. for pressure build-up release other devices should be there in system.
Question is should we give the rates in the check valve spec or leave it to...
As per BS 1868 the leakage rate given is Rate A for resilient seated valves and Rate C (As per BS EN 12266-1) for metallic seated valves.
API 594 states leakage rates as per API 598, which (in table 6) states all resilient seated valves to have ZERO leakage and different rates are listed for...
Dear LittleInch,
Yes at the moment this - the link that your provided - is the solution for valves in this size (and rating) range where two nuts can not fit in the space between end flanges.
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Any idea/information if...
Dear Piping engineers,
As per table 3 of API 594, the face to face dimension of double flanged dual plate check valve for 14"-1500# is 356mm. The bolt length for the 14"-1500# flanges is 405mm. So fitting two bolts with flanges at the ends is not possible.
Taking it other way:
The flange...
Based on MESC, we used to prepare datasheets and issue for procurements! This is what you need to do! MESC description itself is a datasheet. Send it to different vendors to check if they can provide it or not.
When hot tapping has to be done, a fitting is welded on the existing pipe (after checking a number of parameters including thickness at the point of hot tapping). These fittings have a flange at the top. On this flange a valve is installed which would then have Hot tap machine on top (or side...
Class 800 is not from B16.50.
API 602 defines it "Class 800 is not a listed class designation, but is an intermediate class number widely used for socket welding and threaded end compact valves."
