Over pressure
Over pressure
(OP)
Piping codes allow some short periods of operation above design pressure/temperature, but the components like flanges need separate consideration.
When I look in ANSI B16.5 (1.2.2) it refers to ASME boiler code for over pressure limitations.
Where in the ASME code are the rules about operation at a pressure exceeding design ratings? The best I can find is 16% over pressure when safety valves are discharging.
Thanks
Kevin
When I look in ANSI B16.5 (1.2.2) it refers to ASME boiler code for over pressure limitations.
Where in the ASME code are the rules about operation at a pressure exceeding design ratings? The best I can find is 16% over pressure when safety valves are discharging.
Thanks
Kevin





RE: Over pressure
15% overpressure less than 10% of any 24 hr period
20% overpressure less than 1% of any 24 hr period
and B16.34- valves- only allowed 10% overpressure when relief valves are lifting.