The density,tensile yield stress,fracture elongation,and drop hammer impact test indicators of 367 batches of PVC-U drainage pipes were tested according to GB/T 5636.1-2018 and statistically analyzed.It was found that as density increased,the failure of tensile yield stress occurred be-fore the failure of density,while the failure of fracture elongation and drop hammer impact test occurred after the failure of density.The principle and effect of setting density indicators for PVC-U drainage pipes were analyzed from the perspectives of practical application,theory,and standardization.It was regarded that the density index set in PVC-U pipe product standards lacked practical value,and should be can-celled.
关键词
PVC-U排水管材/密度/拉伸屈服应力/断裂伸长率/落锤冲击试验
Key words
PVC-U drainage pipes/density/tensile yield stress/elongation at break/drop hammer impact test
维普
万方数据