procurement of di pipes for laying of 150mm diameter distribution pipe line from proposed semi underground reservoir cum booster pumping station at shitalakhola opposite to kmc health center samajgarh and surrounding area in wd no. 95 br-x procurement of di pipes for laying of 150mm diameter distribution pipe line from proposed semi underground reservoir cum booster pumping station at shitalakhola opposite to kmc health center samajgarh and surrounding area in wd no. 95 br-x , d.i pipe spun ( class k-7 ) 150 mm dia ( tyton joint ) conforming to is:8329 / 2000 class k-7 suitable for push-on-joint ( rubber gasket joining ) with inside cement mortar lining and outside bituminous / synthetic resincoating compatible with the metallic zinc coating as per clause a-8 .