supply of three piece welded empty da gas cylinderthree piece welded empty da gas cylinder,new three piece welded empty da gas cylinder with specification as per is: 7312 (latest version) with water capacity-41 liter , gas capacity - 7 kg (6.3 cum), hydrostatic stretch test pressure-53 kg f /cm2,pneumatic leakage test pressure- 40 kg f /cm2 & maximum working pressure at 15 degree c: 16 kg f /cm including refilling charges of da gas in cylinder at 06 cubic meter per cylinder [ warranty period: 30 months after the date of delivery ] ] , new seamless empty oxygen gas cylinder with specification as per is: 7285 part 2 (latest version) having specification with water capacity- 46.7 liter , gas capacity: 7 cubic meter. & max. working pressure: 150 kgf /cm2 along with refilling of oxygen gas cylinders at rate 06 cubic meter per cylind er. [ warranty period: 30 months after the date of delivery ] ]