supply of shield gas-mixture consisting of 80 argon gas to specification is5760/1998 grade 3 and 20 co2 gas to specification is 307/1966 grade 1, for weldingpurpose. note: (1) the gas filled cylinders supplied shall be suitable for use with 150bar capacity regulators. (2) the supply shall be made in requisite quantity as andwhen required by the railways with span of delivery extending upto oct-2020.
