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Posted by Bob D. on December 01, 2005 at 15:42:39:
In Reply to: High Pressure Relief Valve Testing posted by Mike K on November 25, 2005 at 08:15:57:
Assuming we're talking about power boilers, not a really hot idea, in my opinion. ASME "Rules for Construction of Power Boilers", allows the boiler manufacturer or assembler to test safeties either by using a test fixture (valve table), or by jacking up the boiler pressure (PG-22.214.171.124). Once the unit is out of the production facility and in service, alternative methods as outlined in the Code should be used. If you decide to go ahead and do it "his way", what are you going to do if the valve won't re-seat, or if something else "gives"? Most places (ideally) keep two sets of safeties, and swap them out each year, sending the "off set" out for bench testing and certification. You might find that annual certification of the boiler safeties is mandatory either in your State boiler safety Code, or in the fine print in your machinery insurance policy.
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