Valve design pressure for liquefied hydrocarbons shall be greater than or equal to 2.5 MPa
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The last edit to this post was made by xbl240 on 2023-4-26 at 09:06. During the revision of GB50160-2008 (2018 version), the clause stating that \"the pipeline grade of the valves and fittings at the openings of liquefied hydrocarbon storage tanks should not be lower than 2.0 Mpa\" was removed. However, Section 6 of SH3136 specifies that the material used for the valves in liquefied petroleum gas systems should preferably be carbon steel, and that such valves should possess the same low-temperature resistance and H2S corrosion resistance as the material used for the tanks. Globe valves are preferred for cut-off valves; when gate valves and ball valves are used, they should be equipped with a pressure relief mechanism in their valve chambers. The design pressure of the valve should not be less than 2.5 MPa. Based on the above requirements, my understanding is that for liquefied petroleum gas valves, the European standard requires at least PN40, while the American standard requires at least CL300. Do you all do it this way when carrying out this item?
In accordance with Section 6 of SH3136, the material of the valve body for liquefied petroleum gas should be carbon steel, and it must possess the same low-temperature resistance and H2S corrosion resistance as the material of the tank. Globe valves are preferred for cut-off valves; and when gate valves and ball valves are used, they should be equipped with a pressure relief mechanism in their valve chambers. At the same time, the design pressure of the valve should not be less than 2.5 MPa. Therefore, when designing liquefied hydrocarbon spheres, if the above requirements are followed, the European standard should be at least PN40, while the American standard should be at least CL300. Therefore, reasonable design and selection of appropriate valve products should be carried out based on specific circumstances and requirements. .