We're having a discussion about requirements for lift levers on RVs. ASME BPVC Sec VIII Div 1 para UG-136(a)(3) states "Each pressure relief valve on air, water over 140°F (60”C), or steam service shall have a substantial lifting device . . .". We interpret the "air" fluid as being ambient air with potential high humidity, and condensate in an air receiver tank. Our service is research air, filtered and dried to a -90F dewpoint. We have never lifted lift levers in our system; we remove RVs and bench test periodically either in-house, or at a VR shop for Code valves. Lift levers make valves expensive. I noted in an API RP520 task force meeting (4/20/2005) that "Nobody in room understands the technical justification for the lifting levers. " Since we are testing valves on the unit or on the bench (per NBIC 23, RB3550), should we require lifting levers?
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