For CPVC pipe & fittings , in the market have standard up to GB/T18993.3-2020 and ASTM D2846, so what’ s the difference between GB/T18993.3-2020 and ASTM D2846?
GB/T18993.3-2020 and ASTM D2846 are standards for plastic pipe systems formulated by China and the United States respectively. The main differences are reflected in the scope of application, technical requirements and test methods. The following is a detailed comparison of the two:
| GB/T 18993.3-2020 | ASTM D2846 | |
| Standard | Chinese national standard (GB/T) | American Society for Testing and Materials (ASTM) standards |
| Application | only for CPVC pipe fittings | application scope, covering CPVC piping system (pipe + fittings + connection method, connection method) |
| Size Standard | metric (mm) | British (inch) or metric, compatible with international standards and metric (mm) |
| Test method | refer to GB/T method (such as hydraulic test GB/T6111) | refer to ASTM method (such as pressure test ASTM method D1598) |
| Hygiene Requirement | must comply with China’s drinking water hygiene standards (GB/T17219) | must comply with NSF/ANSI61 and other international certifications, |
| Temperature resistance | the application temperature range of hot and cold water is 0-80°C | Much better high temperature performance ( can reach 93°C) |
| Certificates | must pass China’s compulsory certification (e.g., CCC) | must comply with NSF, UL and other international certifications |