Performing a water pressure test before the boiler is officially started can grasp the problems existing in the boiler early and deal with them in a timely manner. Take oil-fired gas boilers for example.
The hydraulic pressure test of oil-fired gas boilers is generally divided into a hydraulic pressure test and a super-hydraulic test of rated working pressure. The overpressure test pressure of the boiler body is 1.25 times of the rated working pressure of the boiler shell or the rated pressure plus 0.4 MPa.
If one of the following situations occurs, our oil-fired gas boiler also needs to perform an overpressure water pressure test.
1. Before the newly installed boiler starts trial operation;
2. After the boiler's pressure parts have undergone major transformation or replacement;
3. The boiler in operation is performed every six years (combined with overhaul).
If one of the following situations occurs, our oil-fired gas boiler needs to perform a working pressure and hydraulic test.
1. Generally, after large or small repairs or rush repairs, the hydraulic pressure test of the working pressure is performed after the repairs;
2. If the furnace is shut down for more than 30 days, a hydraulic pressure test of working pressure must be performed before ignition.
Previously we said that it was better to perform a hydraulic test for the sake of safety. However, whether it is a steam boiler or a hot water boiler, after the boiler is installed, a hydraulic pressure test (that is, water pressure) must be performed. After long-distance transportation, loading, unloading, and installation, collision and damage are unavoidable. Boiler defects can be found through hydraulic tests, and appropriate measures can be taken in time to ensure the safe operation of the boiler.