Tender Brief : Bids Are Invited For Supply Of Various Gases Hydrogen , Nitrogen , Carbon Dioxide , Helium , Argon , Oxygen , Carbon Monoxide , Co2 0.30-0.32 Per Cent Balance Helium , Hydrogen 2 Per Cent Balance Helium , 10 Per Cent Oxygen In Helium , 5 Per Cent Methane In Helium , Nitrous Oxide , Acetylene , Zero Air N2 79.5 Per Cent Plus O2 20.5 Per Cent , Methane 5.5 Per Cent Ch4 Plus 94.5 Per Cent He , Oxygen Mis Gas 10 Per Cent O2 Plus 90 Per Cent He , Co2 5 Per Cent Co2 Plus 95 Per Cent He Total Quantity : 1154 Read More