Tender For supply and fitment of 112 nos. (56 for oxygen + 56 for cng) automatic brass flash back arrestor (size: 1/2" bsp, min. le ngth: 75mm, working pressure- oxygen 15 bar & cng 5 bar) with cs seamless fittings as per sketch ct-284 in existing cng & oxygen distribution network as shown in drawing no. j&t 4502. nitrogen purging of complete pipeline network to be carried out in staged mann er after completion of fitment work of flash back arrestors. the complete system after above work is required to be fully functional in all respect. make of cs seamless fittings: jindal or equivalent and make of flash back arrestors: esab/gce or similar reputed brand. [ warr anty period: 12 months after the date of delivery ]