Fluorinated polymer polytetrafluorethylene

Fluorinated polymers stand out sharply against other construction materials for their excellent corrosion resistance and high-temperature stability. In this respect they are not only superior to other plastics but also to platinum, gold, glass, enamel and special alloys. The fluorinated plastics used in process plants are polytetrafluorethylene (PTFE), fluorinated ethylene/ propylene (FEP), polytrifiuoromonochlorethylene (PTFCE) and polyvinyl fluoride (PVF). They are much more expensive than other polymers and so are only economical in special situations [59]. 

Piping from plastic tanks may be in aluminium, stainless steel or rigid PVC. Metallic pipework should be used where there exists any serious risk of physical damage. Some fluorinated plastics and rubbers can be used in service with H2O2, for example, polytetrafluorethylene, polyvinylidene fluoride, and a co-polymer of vinylidene fluoride and hexafluoropropylene such as VITON. 

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