On the selection of plastic pipe fittings
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Recently, working on fine chemical projects, I have encountered many organic media that require corrosion resistance (flammable and explosive). PPR/FRPP is planned to be selected. I am facing the following problems: 1. What standard should be used for selecting pipe fittings? HG20539 flanges start from DN65; I would like to use flange connections for both the equipment and valves. What standard should be adopted in this case? 2. Can HG/T20606 be used for gaskets? 3. What standards should be followed for bolts and nuts? For pipe flanges? 4. How to solve the problem of static electricity grounding? I would be extremely grateful if experts could help answer this question
For flammable and explosive media, the use of non-metallic pipes should be avoided; glass-lined pipe flanges can be used with copper sheets bridged at the flanges. If it is truly necessary to use PP-based materials for the pipes, then first, they must be short; second, the flow velocity must be less than 1 m/s; third, copper wires wrapped around the outside of the pipes are used to conduct away the charge.
This post was last edited by fanking on 2009-11-10 08:43. Thanks to sxydxy3 for the reply. 1. For applications involving PP, and for flammable and explosive media that require the use of non-metallic pipes, what standards or specifications govern flow rate limits? 2. For anti-static measures, I also plan to use copper wires wrapped around the outside of the tube to discharge electricity. Also: Are there any non-metallic pipes that can conduct electricity? 3. What standards apply to pipe fittings as well?