C.i df pipe(is:7181) c.i flanged fittings (is: 1538)� c. I. flanged socket tailpieces ( flanged adapters) are used to connect flanged fittings to the plain end (spigot end) of d.i. C.i. A.c. M.s. Pipes. These adapters are ideal for connecting valves, water meters, pumps etc. In your pipelines.