What are the requirements for hydrogen valves?

Due to the particularity of hydrogen medium (small molecule, easy to permeate hydrogen, brittle and explosive, etc.). ), the quality of valve body and bonnet is very high.

1, valve body &; Forging is the first choice for valve cover material. For large diameter valves, castings can be selected, but RT is required.

Secondary film standards;

2. The design and manufacture of valves should not have sharp chamfers, all chamfers should be smooth and excessive, and the machining accuracy and surface degree of parts are very high;

3, the valve needs strict cleaning;

4, pressure test, strength test need to do gas strength test, not just do the strength test with water as the medium;

5. If it is a hydrogen valve, the requirements will be higher. The contents of C, S and P in valve materials need to be controlled, and the crystal phase needs to be tested.

6, hydrogen medium valve, can also be in accordance with the shell.

77/308 hydrogen test specification.

7, must pay attention to fire prevention, anti-flying, anti-static.