埋地塑料排水管关键性能的质量控制——解读GB/T9647—2003热塑性塑料管环刚度的测定

Main Control Parameter of Thermoplastics Pipes for Buried Drainage and Sewerage Systems

新修订的国家标准GB/T9647—2003《热塑性塑料管环刚度的测定》已于2003年3月5日发布,2003年8月1日实施,该标准等效等同采用国际标准ISO99691994,技术内容上完全等同。代替了GB/T9647—88《塑料管材耐外压负荷试验方法》(GB/T9647—88参照采用的是美标ASTMD2412)。新标准对环刚度的定义做出了规定,环刚度符号和检测方法发生了重大变化。并对正确绘制力值-变形曲线与零点修正做出了规定。

Standard GB/T 9647-2003 ＂Thermoplastics pipes-Determination of ring stiffness＂ which has been implemented on August 1,2003. Content of the ring stiffness have changed. And measurement methods on mechanical property items and their testing results evaluation are presented. The ring stiffness should be main control parameter of the thermoplastics pipes for buried drainage and sewerage systems design and productions.