Selection of leak testing medium for designs with a design pressure greater than 6.4 MPa
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This post was last edited by wasiton on 2019-11-20 at 12:40. Hello, experts. I would like to ask some questions regarding airtight media. The design pressure for my project is 7.0 Mpag, and it is required to comply with the latest version of GB50540. GB50540-2009 Code for Construction of Process Piping in Oil and Gas Stations (2012 edition) adds a requirement regarding the pressure for leak testing compared to the 2009 version: “9.3.3 During the tightness test, clean water shall be used as the testing medium when the design pressure is greater than 6.4 MPa.” I would like to ask: since pressure tests were usually conducted using clean water in the past, after the pressure test was successful, air or N2 was used for the leak detection test. Using water for a leak test makes it seem difficult to empty the interior completely, or rust may occur easily. I would like to ask everyone, in situations like this, what kind of medium is commonly used for integrity tests?
Lift it up – please share your opinions
Only water. or other liquids. If it can’t be cleaned thoroughly, then blow it dry.
Given the hazards of gas experiments, conduct liquid testing first and then dry it