Pressure vessel pressure gauge of the following conditions should stop using:
1. Limited only nail gauge, in the absence of pressure, the pointer can not be returned to obstructing the nail place; infinite gauge nails only, in the absence of pressure, the value of the pointer from the zero position error exceeds the allowable pressure gauge;
2. Cover glass pressure vessel rupture or dial gauge dial scale blurred;
3 pressure vessels, pressure gauge calibration seal is damaged or exceed theperiod of validity;
4 spring pressure vessel pressure gauge table loose tube leakage or pressure gauge;
5 other effects gauge accurate indication of the pressure vessel defects.
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Keywords: reactor, heat exchanger, pressure vessel
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