supply and refilling of hydrogen and carbon dioxide gas for 1x660 mw ptep panki kanpur , supply & refilling of hydrogen gas cylinders as per is: 1950-65 grade-i and purity 99.99% with latest amendment thereof and as per following composition:- (1) water: mg/cubic meter = 10 max. (2) oxygen: % by volume = 0.0010 max. (3) co2:% ppp volume = 10 max. (4) hydrogen:% by volume = 99.99 min. note: hydrogen gas will be filled in compressed condition at approx. 155-160 kg/cm2 pressure and temperature 15 degree c to be filled in empty department cylinders. capacity of cylinders: 7 cubic meters. , supply & refilling of carbon dioxide gas confirming to is: 307/1966 with latest revision, dry & purity 99 to 99.99% in empty cylinders given by the department. each cylinder must contain 30 kg carbon dioxide corresponding to 10 cubic meter at atmospheric.%