ONORM EN 715-1994
热塑性塑料管系统.末端.小直径压力管和配件间的负荷轴承连接.在包含端推力的内部水压下密封性的试验方法
Thermoplastics piping systems. End-load bearing joints between small diameter pressure pipes and fittings. Test method for leaktightness under internal water pressure, including end thrust