PE Pipe, HDPE Pipe, Plastic Pipe, Corrugated Pipe DN200-DN2600, SN8 SN10 SN12.5 Certification:ISO9001:2008 &ISO14001:2000 Steel Reinforced Spirally Wound PE ... channel.Diameter NominalDN/ID,mmInternal DiameterDN/ID,mmRing Stiffness RankSN8SN10SN12.5≥8KN/m2≥10KN/m2≥12.5KN/m2External Diameterde,mmExternal Diameterde ...