rate contract for supply of ss tube fittings and valves for the duration of 3 years from the date of award of rate contract at iocl gujarat refinery rate contract for supply of ss tube fittings and valves for the duration of 3 years from the date of award of rate contract at iocl gujarat refinery 1 / 2 npt x 8mm , 12 mm od x1 / 2in npt , 1 / 4in npt ( m ) x 6mm with ferrul & nut , male connector, ss316, 1 / 4in npt male x 10mm od , operating presure-7 kg / cm2g, service-instrument air ( psa ) , flare fitting, 1 / 8x8mm , male connector, ss 316, 3 / 8innptmx 6mmod tube fitting, for pnumetic service, male conn 3 / 8 npt ( m ) x 10 mm, ss 316 , 1 / 2in npt ( f ) x 6 mm , female connector 1 / 2 npt x 10 mm od , female conn 1 / 4 npt ( f ) x 8 mm, ss 316 , female conn 1 / 4 npt ( f ) x 10 mm, ss 316 , female conn 3 / 8 npt ( f ) x 12 mm, ss 316 , female connector ss, 3 / 8in npt ( f ) x 6mm od , tee-union with ferrule & nut , etc