... 90 ductfoot bned, loose puddle flanges, all flanged 45 angle branches, all flanged Y pipes, all flanged radial tees, double flanged pipe, ... with the Standard of EN545, BS4772 and ISO2531; and all types of Ductile Iron manhole covers have been developed in ... and developing strength and perfect checking methods, we have developed all of pipe fittings, adaptors and manhole, achieved the ISO- ...