Piping purging (compressed air)
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Why does the specification specify that purging should be carried out intermittently?
Using a method is one thing; meeting the testing standards is the ultimate goal. The purpose of purging is to meet the usage requirements (standards). The approach adopted may be driven by the need to save energy; if conditions permit, blasting-based purging will yield better results. It is still best to ensure that the cleaning is done properly before installation, and that the requirements are met during the installation process, so as to guarantee smooth cleaning work after installation.
In Shiraoi, for tasks such as blasting and purging of oxygen, nitrogen, and argon pipelines in air separation plants, what size of asbestos gasket should be used as a blasting blind plate?
Intermittent purging is beneficial for removing impurities from inside the pipes, especially steam purging
This is related to experience, as well as the thickness of the asbestos board; generally, a board 3 millimeters thick weighs 2 kilograms, while one 5 millimeters thick can weigh up to 5 kilograms. It also depends on the size of the pipe opening, as well as the size and depth of the scratches on the asbestos board