Flange Fittings as per IS : 1538 Socketted (Lead Joint) Fittings as per IS:1538 Mechanical Joint Fittings as per IS:13382 Customised Fittings as per requirement. The Cast Iron Flange Fittings are suitable for use with Cast Iron Flanged Pipes. Lead Joint Socketted Fittings are used with Cast Iron Socket & Spigot pipes. Mechanical Joint fittings are used with Cast Iron & Ductile Iron Socket & Spigot Pipes.