supply of filled hydrogen gas cylinder with own transportation for mechanical operation for unit 2 and 5, btps. , supply part: material part , compressed hydrogen gas gr-i as is-1090 compressed 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 as per said is. , service part: 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 , gst, if any