Blue casing pipes is plain or ribbed. They have transverse slots and are mainly used in borewells from the water level onwards.Economical and lifelong satisfaction,Leak proof joints,Easy handling, transportation and installation,They are of two types C.S. Pipe : For shallow-depth (up to 80 mtrs) red colour code,C.M. Pipe : For medium-depth (upto 250 mtrs) yellow colour code.