What is a 'pneumatic test' for piping, and when is it used instead of hydrostatic testing?
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A
A test using nitrogen or air at high pressure, used when the system cannot be exposed to water due to process contamination concerns or structural limitations
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B
A test that checks for air pockets in water-filled piping
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C
A test for gas leaks using a combustible gas detector
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D
A preliminary check before hydrostatic testing