rate contract for procurement of h2 gas cylinder with services for 01 year rate contract ( rc ) for procurement of h2 gas cylinder with services for 01 year at bktpp . , hydrogen gas , minimum 99 . 9995% puritycompressed 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 . , cylinder hydralic testing , cylinder cleaning with oil , replacement of v/v safety guard , replacement of v/v spindle , cylinder painting , replacement of v/v gland nut , replacement of valve , cylinder purging , replacement of ptfe washer , replacement of brass washer