procurement of analytical gases for chemical division gsi sr hyd , analytical gases on omonthly basis and contracxt for 1 year from 01 . 02 . 2021 . to 31 . 01 . 2022 . , argon gas ( purity:99 . 99% min ) cylinder capacity 10cum , argon gas ( purity:99 . 998% min ) - cylinder capacity 10cum , dissolved acetylene gas ( purity:99 . 5% min ) - cylinder capacity 7cum , nitrous oxide gas ( purity:99 . 5% min ) - cylinder capacity 17cum , oxygen gas ( purity > 99 . 95% ) - cylinder capacity 7cum , p10 gas ( 10% methane in argon ) ( purity :instrument grade ) - cylinder capacity 7cum , helium gas ( purity :99 . 999% ) - cylinder capacity 7cum , transportation charges per trip ( max 2 x 12 = 24 trips annually ) , rent per cylinder per day after 30 days of delivery at gsi