Grounding issues of hydrogen pipelines
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Dear teachers: I would like to ask for leave to figure out how to set up the static grounding for hydrogen pipelines (at the connections that are not flanged). Which standards specify the requirements in this regard? Thank you!
Refer to GB50177-2005 Code for Design of Hydrogen Stations~~
For the static grounding of oxygen and hydrogen pipelines, ground bolts are generally installed on two flanges, with sizes ranging from M6 to M10, on both the inlet and outlet flanges； The standard specifications are the aforementioned reference, namely the \"GB50177-2005 Design Code for Hydrogen Stations\", and technical specifications generally exist for such operating conditions, which can be taken into consideration! :)
Clause 15.3.2-2 of DL 5190.6 stipulates that the grounding of hydrogen pipelines shall meet the following requirements: (1) The grounding designed to prevent lightning waves from penetrating buildings for hydrogen pipelines installed outdoors must be reliable. (2) For hydrogen pipelines installed overhead indoors and outdoors, lightning induction protection grounding should be provided every 20m to 25m. (3) The connections at flanges and valves should be bonded to ground. (4) Grounded equipment, pipes, etc. shall all be equipped with grounding terminals, and the connection between the grounding terminals and the grounding wires shall be secure. (5) For equipment and pipes subject to vibration and displacement, flexible connection wires should be used at their joints as a transition. (6) The grounding resistance of the hydrogen pipeline system shall meet the requirements of the equipment. When no design requirements are specified, the grounding resistance must not exceed 10Ω.