... pipe-PE80, pls see below information:Standard size ratio: SDR17.6/SDR11DN:20/25/32/40/50/63/75/90/110mmEN ... pipe-PE100, pls see below information:Standard size ratio: SDR17.6/SDR11DN:20/25/32/40/50/63/75/90/110EN ... , connected and easy installation, easy to grasp, greatly improving efficiency.6) welding interface closely, leakage rate is extremely low.7) security ...