supply of liquid oxygen shall confirm minimum purity 99 % when tested in gaseous form as per clause 4.1 and 4.2 of is : 309/92 with amendment no.1 in supplier owned portacryo tank 02 nos . gas flow rate of each portacryo is 60 cum/hour & outlet pressure 12-15 bar.liquid oxygen shall confirm minimum purity 99 % when tested in gaseous form as per clause 4.1 and 4.2 of is : 309/92 with amendment no.1 in supplier owned portacryo tank 02 nos . gas flow rate of each portacryo is 60 cum/hour & outlet pressure 12-15 bar.,liquid oxygen shall confirm minimum purity 99 % when tested in gaseous form a s per clause 4.1 and 4.2 of is : 309/92 with amendment no.1 in supplier owned portacryo tank 02 nos . gas flow rate of each portacryo is 60 cum/hour & outlet pressure 12-15 bar. [ warr anty period: 30 months after the date of delivery ] ]