... Size: 50x50mm 76x76mm 100x100mm Material:PP PE PVC CPVC PVDF etc ISO9001:2008 Plastic Heilex Ring ... (PE), polypropylene (PP), reinforced polypropylene (RPP), polyvinyl chloride (PVC), chloridized polyvinyl chloride (CPVC) and polyvinylidene fluoride (PVDF). It has features ... towers in petroleum industry, chemical industry, alkali-Chloride industry, coal gas industry and environmental protection, etc ...