What is the notice of preheating before steel plate cutting

There are some instructions for preheating of steel plate before cutting, specifically: if flame cutting is adopted, the steel plate shall be preheated under normal conditions, and the preheating temperature is determined by the two factors of steel plate quality grade and steel plate thickness, and the preheating method is determined by the actual situation and preheating requirements.

In addition, the whole steel plate interface should be evenly heated without local overheating and other problems. If the overall preheating cannot be carried out, local preheating can be carried out.