Filter grounding
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Article 9.3.3 of the \"Code for Fire Protection Design of Petrochemical Enterprises\" (GB50160-2008) requires that pipelines carrying combustible gases, liquefied hydrocarbons, combustible liquids, and combustible solids be equipped with static grounding facilities at the following locations, including pipeline pumps as well as permanent filters and buffers at the pump inlets. Do all filters need to be connected to an electrostatic ground? To this end, on June 29, 2015, CNOOC Shell Petrochemical Co., Ltd. sought consultation from the **management team of the Code for Fire Protection Design of Petrochemical Enterprises**. On June 29, 2016, the **Standard Management Group for the Code for Fire Protection Design of Petrochemical Enterprises** responded after conducting research: Regarding the filters specified in Article 9.3.3 of the Code for Fire Protection Design of Petrochemical Enterprises (GB50160-2008), the terms “permanent filters, buffers, etc. at the inlet of pipeline pumps” refer to small-scale equipment that meets specific process requirements, has an official equipment designation in the PID, and is equipped with its own foundation; such equipment does not require static electricity grounding facilities if it exists merely as a pipe accessory. In this way. Temporary filters such as Y-type and conical filters commonly used at pump inlets are no longer needed. I worked on a project recently. The outlet of the Class A B liquid pump is DN100; it is equipped with a precision filter that has filter elements and legs, and it rests on a separate foundation. It also has a serial number. In fact, the project specifications require that components before the pump as well be numbered, but this applies only to special piping fittings. Does the filter behind this pump need to be grounded?
From a regulatory perspective, static grounding is indeed a very important safety measure. Regarding the issue of filter grounding, it is recommended to pay attention to the following points: The grounding resistance value of the filter should generally be ≤10Ω, and it is advised to use a professional grounding resistance tester for testing during installation ； In addition to the permanent filters required by regulations, when temporary filters are reinstalled after being removed for maintenance, it is also necessary to check whether the grounding connections are secure ； A common problem in practical use is loose or corroded grounding wires; it is recommended to conduct regular inspections and maintenance. We have been strictly implementing these measures for many years, with excellent results. If specific issues arise during construction, they can be discussed in more detail.