supply of filled hydrogen gas cylinder with own transportation for mechanical operation for unit 1 2 5 btps. , part a: , material code: m10-z01-00003 hsn: 2804 hydrogen gas , minimum 99 . 9995% purity compressed purified hydrogen gas , conforming to is: 1090 / 1983 , grade-ii having minimum 99 . 9995% purity ( vol ) , moisture content less than 2 . 0 ppm , dew point:-65 degree c , nitrogen: 5 ppm , cylinder pressure : 140-150 kg / cm2 . ( including to and fro transportation ) , part b : cost of cylinder parts , painting of gas cylinder , replacement of cylinder valves , replacement of cylinder spindle , replacement of cylinder cap , replacement of gland nut , replacement of washer , testing of gas cylinder , part c : cylinder rental charge , cylinder rental charges for holding ( up to 10 days cylinder holding charge free of cost ) , gst ( if any )