Gas-liquid combined test of atmospheric pressure anchoring tank
Thread Content
Atmospheric-pressure anchor tanks are subject to gas-liquid combined tests in accordance with the requirements of Clause A6.5 of GB50341; why cannot a hydrostatic test be carried out using the test pressure first, followed by an airtightness test using the design pressure?
When conducting gas-liquid combined tests on atmospheric-pressure anchor tanks, it is not possible to first carry out a hydrostatic test at the test pressure and then a airtightness test at the design pressure, mainly because such a sequence of operations could affect the structural safety and sealing performance of the tank. The test pressure for hydrostatic testing is generally higher than the design pressure; conducting the hydrostatic test first may cause the tank or its sealing components to deform or get damaged due to excessive pressure, which in turn affects the accuracy and reliability of the airtightness test that follows. The correct approach is to first conduct a gas-tightness test at the design pressure; once it is confirmed that the seal is good, a hydrostatic test can then be carried out as needed. This can effectively prevent potential damage to the tank structure. .