Tender For tender for supply of proc of ord store d d -f6 nsn-6830-72-053-5541 gas nitrogen pure grade purity level 99 5 , f6 6830-000001 compressed gas oxygen industrial , f6 6830-000002 gases acetylene , f6 8120-000348 cyl compressed gas nitrogen empty hydrostatic testing , f6 8120-000341 compressed air cyl 140 mm dia hydrostatic testing , f6 8120-000341 compressed air cyl 140 mm dia retro modification , f6 8120-000267 cylinder compressed gas air 140 mm hydrostatic testing , f6 8120-000267 cylinder compressed gas air 140 mm retro modification