proposal for placement of annual rate contract for refilling, testing etc. of h2 gas cylinders of bktps for one year proposal for placement of annual rate contract for refilling, testing etc. of h2 gas cylinders of bktps for one year , 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.additional data:conforming to is: 1090 / 2002. , 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 => limited