... excellent quality as anti-high-compression,anxi-oxidation,anti-corrosion,etc,so the ductile iron pipe fittings are widely applied to such ... 2.Standard and exporting countries:all types of ductile iron pipe fittings produced by us according to ISO2531 BSEN545 EN598 BS4772, ... appraisal from the end-users.1.pipe fitting Standards:ISO2531,EN545,EN598,BS47722.pipe fittings Material:GGG500-12.450-10.500- ...