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Can electric welding be used on other pipelines connected to the hydrogen pipeline in chlor-alkali production?

2010-11-03View Original

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The hydrogen pipelines in our plant are operating normally during regular production, with a hydrogen flow rate of 20 m/s. As is well known, chemical production areas are equipped with numerous pipe racks and cable trays, and these racks and trays are filled with various pipes that are interconnected with each other; the hydrogen main pipes are installed on these cable trays along with other pipes. Let’s assume that I apply a current at the end A of the bridge frame; then a current will also be generated at the end B of the bridge frame, and the voltages will be equal (since there are many other metal pipes on the bridge frame, and the hydrogen pipeline is also a metal pipe, the pipes and their supports are always connected in series to one another). Now, let’s say there is a hydrogen main pipe arranged on the B-end bridge frame, and it is necessary to perform electric welding on the pure water pipeline at the A-end (a metal pipeline). Is there any safety risk in this? (The pure water pipeline and the hydrogen main pipe must be connected to each other through the messy metal pipes on the cable tray), in other words, will the static electricity generated by electric welding on the pure water pipeline at end A have an impact on the hydrogen main pipe at end B? In other words, does the static electricity from the welding machine have an impact on the hydrogen pipeline, and if so, how significant is that impact? How to prevent it! Please share your opinions and views; it would be good if appropriate reasons can be provided, and relevant national standards would be even better!
Reply #22011-04-06
Connect the grounding points in close proximity to each other to prevent other pipelines from being electrified; the grounding can be redone at the welding site, and it must be led to that location.

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