Description of ductile iron pipe fittings: 1) Flange type / Socket type. 2) Material: Ductile Iron. 3) Certification: According to ISO2531/ ISO7186/ EN545/ EN598/ GB/ T13295 Has passed Loyd's ISO9001: 200 certification. Passed Product Conformity Accreditation (ISO2531/ ISO7186/ EN545/ EN598ISO4179/ TSO8179- 1/ ISO8179- 2) from Bureau Veritas of France. The company has passed ISO14001 environmental protection system certification. The company has passed GB/ T28001 occupational health and safety management system certification Certificate of Conformity of Product Quality approved by Korea . 4) Pressure: PN10, PN16. 5) Surface treatment: inside: Cement mortar lining linings of epoxypowder. ceramic epoxy , polyurethane or polyethylene etc. can be supplied also as per requirement. outside: Zinc coating and Bitumen painting or polyurethane etc . If you are interested in our products, please contact us. The high quality and competitive price will give you every satisfaction. We are looking forward to serving you. Weifang Xinli Import And Export CompanyTEL: 86- 536- 8589272FAX: 86- 536- 8589520