supply of flash back arrestor(dry type) for torch end of oxygen lines to prevent flash backs in oxy fuel system conforming to en 730/iso 5175-1/is 11006 standards wit h flame arrestor(fa) and non return valve(nrv) working pressure: 15 bar. end conn ections g 3/8 rh to en 560/iso 3253 standards. make: messer(cg-91 oxy) or esab(fr-18) o r gce(fr-20t oxy) only. note:1) offers of oems or their authorised dealers enclosin g valid authorised dealership certificate only will be considered. 2) the suppliers s hall send test certificate from govt. authorised test house. in case of internation al brand, the test certificate from reputed institute like bam, germany is mandator y. 3) the suppliers should have equipments for testing of flash back arrestors and calibration. the purchaser has the right to inspect these installations.spec:en 730/i so 5175-1/is 11006 [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ] => limited