Issues regarding pipes and valves in polyethylene plants.
Thread Content
Hello, esteemed colleagues. I work in the field of special valves, and I would like to ask: what types of valves are used for pipelines in systems made of polyethylene and polypropylene? What are the operating conditions associated with polyethylene production, aside from high temperature, high pressure, and high corrosion levels (hydrogen corrosion, ammonia corrosion?) ), high wear (dust erosion), what else? I searched online for ages, but there’s very little information on this topic. Could it be that my search method isn’t correct? (~_~;) Do you have any relevant standards or materials to recommend? I’d be extremely grateful!
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Valves: ball valves/butterfly valves gate valves check valves cylinder valves electric valves safety valves, etc. Harsh conditions: high temperature and high pressure, such as high-pressure steam, medium-pressure steam ； Corrosion-prone types: CL-resistant- ； High-precision: hydrogen valve ； Flammable and explosive: aluminum alkyls, etc ；
Polypropylene and polyethylene generally use process packages imported from abroad; there are also PDS feeding valves that require wear resistance, and for these purposes materials such as Nalco, Catem, and Ags are typically used. . .