How to determine the hydrostatic test value for storage tanks

The pressure test pressure should generally be 1.5 times the design pressure.

If the storage tank is a pressure vessel, refer to 4.6.2 of GB150; if it is a vessel at normal pressure, refer to 4.8.2 of NBT47003.1

200 mm of water column refers to the pressure generated by 200 mm deep of water.

Some learning insights: For atmospheric pressure storage tanks, \"atmospheric pressure\" refers to a situation where the internal pressure is not greater than the weight per unit area of the tank roof. Previously, the design pressure was set at 200 mm of water column (the source is unknown), while the negative pressure was limited to 250 Pa (in the old version of standard 50341, the negative pressure was 490 Pa). For micro-positive-pressure storage tanks, the maximum design positive pressure is 18 KPa, and the maximum design negative pressure is 6.9 KPa. A fixed-roof oil tank with a negative pressure exceeding 250 Pa and not exceeding 6.9 KPa is considered a negative-pressure oil tank. Test for the strength and tightness of the fixed roof, as well as pressure test on the roof of the tank. Regarding the positive pressure test value of 220 mm water column (I don’t know what to ask?) ) The fixed roof stability test, as well as the roof vacuum test, have Pr-DL values as specified in Section B.6 of the appendix for both atmospheric-pressure and externally pressurized storage tanks.

Same question: it seems that the requirements for water filling tests in GB50341 and 50128 are different

The voltage withstanding test is primarily based on TSG 21-2016 3.2.12; for other specific regulations, refer to the particular requirements outlined in those regulations.