1. If the products cut by flame can meet the requirements, do not consider the water jet.

2. If you just think that the cost of flame cutting is high and want to use a water jet, it's a big mistake.

3. If you just think that the speed of flame cutting is slow and want to use a water jet, it's a big mistake.

4. If it is difficult to deal with the deformation, hardening and slag hanging caused by flame cutting, water jet should be considered.

5. If you think that flame cutting after processing, resulting in a large waste of materials, processing capacity, then use water knife cutting it.

6. If the cutting material is expensive and you want to make high use of it, you must use a water knife.