I.S.CODES RELATED TO DUCTILE IRON PIPES IS 9523:1980 Ductile Iron fittings for pressure pipes for water, gas and sewage
IS 8329:1977 Centrifugally cast (spun) Ductile Iron pressure pipes for water, gas and sewage IS 12288:1987 Code of practice for laying of Ductile Iron pipes Got it ! OK !