CPVCCorzan CPVC is a high heat, corrosion resistant chlorinated polyvinyl chloride(CPVC) sheet. Because of its excellent corrosion resistance at elevated temperatures, it is ideally suited for self–supporting constructions where high temperatures are a concern. It can be used (depending on chemistry) up to 180°F. Corzan CPVC conforms to ASTM–D–1784–95 Class 23447–B (formerly Type IV Grade 1) and is manufactured without fillers or plasticizers. It exhibits excellent fire properties UL–94V–0 and flame spread less than 20 per ASTM E–84. Corzan CPVC is a system approach which allows you, our customer (through numerous component manufacturers) to provide a totally integrated system, all produced from the same family of Corzan materials.