Supply Of Carbon Dioxide Gas For Welding...Carbon Dioxide Gas For Welding...,Carbon Dioxide Gas For Welding Specn No.Is:307/1966. Grade-I And Co2 Purity Minimum 99.98 / 9 9.9% Volume (Fertiliser Quality).Old Pl(81989120,81988813) As Per Drg.No. Is No-307/66, 2Nd Revision Reaffir Med-2006 Specn: Carbon Dioxide Gas (Co2) [ Warranty Period: 30 Months After The Date Of Delivery ]