Polyethylene pipes for water supply – GB/T13663 ISO4427 PE63 dn SDR33 SDR26 SDR17.6 SDR13.6 SDR11 0.32Mpa 0.4Mpa 0.6Mpa 0.8Mpa 1.0Mpa thickness kg/m thickness kg/m thickness kg/m thickness kg/m thickness kg/m 20 2.3 0.130 25 2.3 0.167 32 2.3 0.219 2.4 0.228 2.9 0.270 40 2.3 0.278 3.0 0.356 3.7 0.430 50 2.3 0.351 2.9 0.437…