Sampling
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How to inspect dry gas and liquefied gas before sampling?
The main things to check are whether there are any other welding or burning activities in the vicinity, then check the wind vane; stand in the upwind direction and wear gloves and a gas mask
This post was last edited by ylb913 on 2018-7-4 20:12. This is still a rather novel issue. The reply upstairs addressed the safety issues during sampling. I think there is also the issue of sample representativeness: 1) Liquid (amine-containing liquid) often accompanies the flow at the outlet of the desulfurization tower; in such cases, the hydrogen sulfide level in the sample tends to be high, so it is necessary to find a location where no liquid is present for sampling ； 2) The issue of sample replacement: For products that have always been qualified, I think it doesn’t matter whether replacement is done or not when sampling. For cases where the previous sample fails to meet the requirements, the sampling bag (or cylinder) must be replaced, as well as the dead zone ahead of the sampling valve.