procurement of liquid chlorine for ntpc korba, vindhyachal, sipat, mouda and khargone procurement of liquid chlorine for ntpc korba, vindhyachal, sipat, mouda and khargone , chemicals and gases chlorine, is:646 [ item sl. no. 10 to 80 are for ntpc korba ] , freight charges , hydraulic testing of cl2 cylinders , replacement of caps , repalcement of valves , repalcement of brass nut , repalcement of spindle , painting of cylinders , liquid chlorine is:646 technical [ item sl. no. 90 to 150 are for ntpc vindhyachal ] , hydraulic testing of cl2 cylinders , replacement of caps , replacement of valves , replacement of brass nuts , replacement of spindle , painting of cylinders , liquid chlorine is:646 technical [ item sl. no. 160 to 220 are for ntpc sipat ] , hydraulic testing of cl2 cylinders , replacement of caps , replacement of tonner valves , replacement of brass nut , replacement of spindle , painting of cylinders , liquid chlorine is:646 technical [ item sl. no. 230 to 300 are for ntpc mouda ] , replacement of caps , replacement of tonner valves , replacement of brass nut , replacement of spindle , replacement of plug , hydrotesting charges , painting charges , liquid chlorine is:646 technical [ item sl. no. 310 to 380 are for ntpc khargone ] , hydraulic testing of cl2 cylinders , replacement of caps , replacement of valves , replacement of brass nut , replacement of spindle , painting of cylinders , freight charges => limited