聚乙烯管材标准发展现状分析

对比了聚乙烯管道和金属管道设计方法的差异,分析了标准中对于管材最小壁厚的计算公式差异的原因.综述了聚乙烯管道标准两个体系的区别和联系,其中一个是国际公认的国际标准化组织(ISO)编制的标准体系,另一个是美国机械工程师学会(ASME)、美国材料实验协会(ASTM)、美国塑料管道协会(PPI)编制的标准体系,两个标准体系对...

Development Status of Technical Standards in Polyethylene Piping

The differences in the design methods of polyethylene （PE） pipes and metal pipes were compared， and the differences and connections between the two systems of PE pipe standards were reviewed. One of them is an internationally recognized standard system made by the International Organization for Standardization （ISO）， and the other belongs to the standard system compiled by the American Society of Mechanical Engineers （ASME）， the American Society for Testing and Materials （ASTM）， and the American Plastic Piping Association （PPI）. The basis and test methods for the classification of PE materials in these two standard systems are different， and the design coefficient values in the wall thickness calculation are also different. The problems in the current domestic and foreign standards were proposed and analyzed. On the basis of the application of PE pipes in the fields of natural gas， water supply， and nuclear power plant in China， some suggestions were proposed for the Chinese government to establish a set of technical standards that can meet the requirement of various applications and are also suitable for the industrial status of PE pipes.