Sequence issue of 4.0MPa steam target shooting
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There is no doubt that the sequence for purging with 4.0MPa steam is \"the main pipe first, then the branch pipes\". So, after purging and testing the main pipe, when it comes to purging and testing the branch pipes, should it be done from near to far or from far to near?
At the farthest end of the pipeline, there will be a set of steam traps; first perform purging at that point, and then proceed with purging from further away towards the nearer end
In my opinion, as long as the main pipeline cleaning is done properly, there is no issue with the branch pipelines, whether they are cleaned from far to near or from near to far.
From near to far, as passing the targeting test does not guarantee the absence of impurities, approaching from near to far allows for a better assurance of the purity of the tube