annual rate contract for refilling, testing etc. of h2 gas cylinders of bktps for 2 years.=-1 compressed hydrogen gas gr-i as is -1090compressed hydrogen gas,conforming to is:1090-2002 with latest revision,if any , having purity : 99.98 %minm.by volume , moisture content 4 mg/m3 maxm.,oxygen : 4ppm by volume maxm. & rest of the parameters asper said is.additional data:specification:compressed , purified h2 gas confirming to is:1090:2002,grade-ivolume of each cylinder: 6.3 m3, filling pressure of eachcylinder: 150 kg/cm2.1 h2 purity 99.98%2 max 02 content in ppm (by volume) 4.03 max n2 content in ppm (by volume) 100.004 max co2 content in ppm (by volume) 5.05 max co content in ppm (by volume) 1.06 mercury nil7 max hydrocarbon content in ppm (by volume) 1.08 max moisture content-water vapour (in mg/m3) 4.09 dew point temp (-) 46 deg c or less 2 cylinder hydralic testing 3 cynlider cleaning with oil 4 replacement of v/v safety guard 5 replacement of v/v spindle 6 cylinder painting 7 replacement of gland nut 8 replacement of valve 9 cylinder purging 10 replacement of ptfe washer 11 replacement of brass washer