... 3.class: K7,K8,K9,K10,K12,K20 4.usage: water supply 1.standard: ISO2531 EN545 2.specification: DN80-DN1200 3.class ... : K7,K8,K9,K10,K12,K20 4.usage: water supply 5.T-type 1.Material: ductile iron pipe2.standard: ISO2531 ... EN5453.Specification: DN80-DN16004.Usage: water supply5.Class: K7,K8,K9,K10,K12,K206.Inner surface ...