Lifting Levers
Lifting Levers
(OP)
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?
Larry





RE: Lifting Levers
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Lifting Levers
You may want to review ASME Code Case 2203, there are instances when lifting levers can be omitted for Section VIII but not for Section I equipment. Here's a couple of links that will give you some insight...
http://www.prdtechnologies.com/id19.htm
ht
RE: Lifting Levers
Thanks. That's exactly what I'm looking for. Much appreciation!
Larry