Confirm operations before hot work on process pipelines
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This post was last edited by Jubao Pen Yi on 2018-6-12 at 14:15 – to confirm the procedures to be followed before carrying out hot work on process pipelines
This post was last edited by ylb913 on 2018-6-12 at 20:32: Use steam or nitrogen for purging, and ensure that the drain valves at the lowest point are fully open and unobstructed. Sample and analyze the combustible gas concentration before starting work; the explosion limit of combustible gases is >4%, while the acceptable detection level is <0.5% ； The explosive limit of flammable gases is <4%, and the acceptable detection threshold is <0.2%.