supply of liquified oxygen gas in supplier -owned portacryo tanks, confirm minimum purity 99.9% when tested in gaseous form as per clause 4.1 and 4.2 of is:309/(fifth revision or latest) . at wagon repair shop kota portacryo tanks be 02 each having a capacity of 01kl, gas flow rate flow rate of each portacryo shall be 100 cum/hour, with an outlet pressure 12-15 bar and the supplier shall supply oxygen gas through a mobile oxygen cascade. as per drg.no. na