Casing Pipes conforming to IS 12818:1992 These pipes are manufactured as per BIS standard and are available in deep blue colour. One end of the pipe is male threaded where as other end is female threaded socket. Threads to protect the thread in transit. Pipes of medium Well (C.M.) are available. Shallow Well pipes can be used for depths up to 80 meters medium well pipes can be used up to 250 meters.