Regarding boiler pressure testing
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During boiler pressure testing, the pressure is controlled using the feed water pump and the drain valve; after that, isn’t it necessary to maintain a stable pressure? When stabilizing the pressure, should the feed water pump be stopped and the blowdown valve closed, or should the feed water pump remain running with the blowdown valve still open? I’m a beginner in chemical engineering and hope experts can give me some guidance. Thank you
Both the feed water pump and the drain valve are connected to pipes, and the feed water valve is also closed; this is done to build up pressure. If the pressure drops, it indicates that there is a leak or that a valve isn’t sealing properly. If the pump and the drain valve are open, it’s impossible to tell whether there is a leak in the pipes
During voltage stabilization, the feed water pump and valves must be turned off.
Personal opinion: There are several key points regarding the pressurization of waste heat boilers: 1. Only the pump outlet valve and the feedwater bypass valve can be used for adjustment; it is not recommended to use control valves for this purpose； 2. The pressure increase rate is ≤ 0.2 Mpa/min; the pressure decrease rate