supply of different types of gases on rate contract basis for a period of initially for one year , refilling of ar gas in gas cylinder of (water capacity of ~47lts.), grade-i, purity - 99.999% @ 140 bar andfilling pressure 140kg-150kg/cm² , refilling of c2h2 gas in gas cylinder of (water capacityof~47lts.), grade-i, purity > 99.9% andfilling pressure 140kg-150kg/cm² , refilling of co2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-i, 99.97 %, qty-30 kgs andfilling pressure 140kg-150kg/cm² , refilling of forming gas n2-90% + h2-bal, in gas cylinder of (water capacity of ~ 47lts.), grade-i, purity - 99.99%, andfilling pressure 140kg-150kg/cm² , refilling of h2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-i, purity – 99.999 % and filling pressure 140kg-150kgcm²/ , refilling of mixture ar 95%+bal h2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-i, purity – 99.99%. andfilling pressure 140kg-150kg/cm² , refilling of n2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-i, purity - 99.999% andfilling pressure 140kg-150kg/cm² , refilling of o2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-i, purity - 99.999% andfilling pressure 140kg-150kg/cm² , refilling of o2 gas in gas cylinder of (water capacity of ~ 47lts.), grade-ii, purity - 99.7% andfilling pressure 140kg-150kg/cm² , refilling of p-10 gas (90% ar+10%methane) in gas cylinder of (water capacity of ~ 47lts. ),,grade-i, purity- 99.999% andfilling pressure 140kg-150kgcm²/ , repainting of gas cylinder, water capacity-47 liter with proper color code (if required) , hydro testing of above size cylinders (if required) , change of valves or valve seals (if required)