... Name CMAX pictures honor:FactorySpecifications: 1) The standard of pipe: ISO 2531 - 1998, EN545-2002 , K9 2) Effective length: ... Zinc coating: at least 130gsm as per ISO 8179 5) Bitumen painting: at least 70um as ... 1,600 mm 8) High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, ... joint with flange and bolts available iso 2531 k9 ductile iron pipe