Can cast iron valves be pressure-tested with gas?
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Can cast iron valves be pressure-tested with gas?
It’s best to use someone as a test subject, as this ensures high safety. Especially with cast iron, if gas pressure testing is used, it is very dangerous if an explosion occurs. The principle is that the compressibility coefficients of liquids and gases are different.
Start with water first; if the water pressure is sufficient, then use air pressure, as that’s safer.
It shouldn’t exceed 0.6 MPa; just do it that way. If in doubt, follow what was said above and use water first
Hydraulic pressure must be applied. The pneumatic test shall be determined based on the design specifications and the hazard level of the medium. Is it a pressure leakage test or a tightness test? Safety measures are very important, as cast iron can be explosive. Are they for water supply and drainage pipelines or industrial pipelines?
#Reply quickly here with # – it’s okay, but the air pressure can’t be very high. It is usually a hydrostatic pressure test
There are clear annotations in the experimental standards; it is recommended that you check the experimental guidelines. Some questions were answered for you, but it’s better if you look at them yourself; that way you’ll really remember everything clearly