Slag Inclusion Cutting Method for Straight Seam Steel Pipe

1. Regardless of whether the straight seam steel pipe is rotated or fixed The cutting nozzle should be kept perpendicular to the surface of the straight seam steel pipe. After the cutting is completed, the cutting nozzle is gradually tilted forward at an angle of 70°-80° with the tangent line of the cutting point.

2. Gas cutting generally starts from the lower part of the straight seam steel pipe when fixing the straight seam steel pipe.

3. The selection of cutting nozzle and oxygen pressure is related to the thickness of the straight seam steel pipe, which can be selected according to actual conditions.

4. The distance between the cutting nozzle and the surface of the straight seam steel pipe should be determined according to the length of the preheating flame and the thickness of the straight seam steel pipe. Generally, the distance from the end of the flame core is 3--5mm.

5. After the straight seam steel pipe is cut, apply the iron oxide slag at the cut of the file or hand grinding wheel to make it smooth and clean. At the same time, the end face of the straight seam steel pipe should be kept perpendicular to the centerline of the pipe.

6. At the end of the gas cutting, the cutting oxygen valve, and the acetylene valve should be quickly closed to preheat the oxygen valve.