What is the principle behind checking for leaks in double-wall tanks and double-wall pipes?

2018-08-08View Original

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What is the principle behind checking for leaks in double-wall tanks and double-wall pipes?

Reply #22018-08-08

Double-layer storage tanks can be inspected for leaks using helium; helium is filled into the inner container and the outer shell, while the space between them is evacuated. A helium leak detector is connected to the system, and if there is a leak, the device will give an alarm indicating the leak rate.

Reply #32018-08-08

This post was last edited by ylb913 on 2018-8-9 at 19:35. It involves injecting a pressure testing medium into the interlayer to check for internal leaks (the equipment or pipelines need to be open in order to detect these) as well as external leaks.

Reply #42018-08-09

After the storage tank is put into use, helium is no longer introduced into it

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