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The hydraulic test is one of the important inspection projects in the later stage of the manufacturing of boiler auxiliary machinery and pressure vessel manufacturing industry. Its main purpose is to check whether the welding and materials are blasted under the rated pressure to ensure the safety and reliability of the user. According to the different application requirements of the product, the hydraulic pressure test can be generally divided into three types: low pressure (P_g10MPa). In the pressure test, the inlet and outlet of the product need to be sealed, and pressurized water is injected at the inlet end, so a special pressure test is needed. Fixtures to do this work. For a long time, the characteristics of auxiliary machines and pressure vessel products are varieties.