DIN EN 1277-2004 塑料管道系统.用于地下无压装置的热塑性管道系统.橡胶密封环连接件密封性的检验方法
Plastics piping systems - Thermoplastics piping systems for buried non-pressure applications - Test methods for leaktightness of elastomeric sealing ring type joints; German version EN 1277:2003
This standard specifies three basic test pressures for determining the leaktightness of elastomeric sealing ring type joints for buried thermoplastics non-pressure piping systems.