Gas Freeing, Purging & Leak Testing of Process Equipment ...

On completion of the N2 reinstatement leak test, the N2 shall be depressurised to approximately 2 psi (g) for inert blanketing the system. Bubble Forming Solution The bubble forming solution shall produce a film that does not break from the area being tested and the bubbles formed shall not break rapidly due to air drying or low surface tension. ................
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