| Comparison between High and Low Pressure Welding System
| | High Pressure Welding | Low Pressure Welding |
| 1. | The pressure is decrease by means of reducing valves. The gases are mix around in equal extent in the blow pipe mixing chamber. | The oxygen is supplied from high pressure cylinders during reducing valves as in high pressure system but the blow pipe intended in such a way that the high pressure oxygen drives or inject the low pressure acetylene to blow pipe tip. |
| 2. | Hydraulic back pressure valve is not necessary. | Hydraulic back pressure valve is a necessity. |
| 3. | Continuous and heavy work can be finished at stable pressure. | Caused by generated acetylene the pressure varies. |
| 4. | Plant is moveable and simple to assemble and dismantle. | Generator is difficult to move and lot of space is required. |
| 5. | Acetylene is in purified and dry form. | Acetylene is purifying during purifiers and then dries. |
| 6. | Acetylene gas is full from steel cylinder in compressed form. | Acetylene gas is full from generator at low pressure. |
| 7. | Precise and clean plant. | Lot of purity is needed in generate the acetylene gas. |
| 8. | Extra safe plant. | Less safe plant as the probability of leakage is always there in generator connected lop. |
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