1.Ductile Cast Iron Pipes 2.Class K9,TYTON Joint,L ... BS4772 4.Strength,Durability ,Safety,long life 1. Ductile Cast Iron Pipes2. STANDARDS: ISO 2531; EN545; BS4772; ... REQUIREMENTS. BITUMEN PAINTING ACCORDING TO ISO8179. EPOXY LINING PIPES CAN BE PROVIDED AS PER BUYERS' REQUESTS.8. ... PRESSURE TESTED ONE BY ONE. Mechanical properties of ductile cast iron pipes: Ductile Iron PipeTensile Strength (N/mm²) ≥420 ...