May I ask whether in areas with fire hazard classification of Class A and B (explosion-proof zones), the use of non-metallic pipes is prohibited? ? What standards are written...
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May I ask whether in areas with fire hazard classification of Class A and B (explosion-proof zones), the use of non-metallic pipes is prohibited? ? What standards state that? If non-metallic pipes can be used, what issues need to be considered (such as how to handle static grounding)? ? ? ?
Non-metallic pipes can be used. For details, refer to the Code for Acceptance of Construction Quality of Non-metallic Piping Projects in Petrochemical Industries
This post was last edited by sifangok on 2016-11-17 08:45. Who says it can’t be done? Once non-metallic pipes are buried underground, there is no more issue of static electricity. Additionally, wrapping the pipeline with metal wire for grounding, as well as using pipes designed to prevent static electricity, doesn’t seem reliable in my opinion. If the liquid being transported is flammable and explosive but not highly corrosive, it’s sufficient to use stainless steel or copper wires inside the pipeline as grounding wires, with these wires being grounded at appropriate locations. Wires are usually very thin, posing little resistance to the fluid; remember to try to avoid connecting the wires inside the pipes in order to reduce resistance
Stainless steel wire is placed inside pipes – are there any standards to refer to for this practice?
Don’t think about it; experts say they’ve never seen it, it’s not possible...