The relationship between the welding speed of ERW pipes and the quality of the weld is mainly reflected in the heating stage and the crystallization stage.

If the cold treatment method of seamless steel pipe is not correct, it will affect its performance to a certain extent.

The ERW pipe forming roll is an important part of the welded pipe unit and the technical core of the welded pipe forming process. The forming of the ERW pipe needs to go through five basic processes: edge bending-overall bending-closed introduction-extrusion welding-shaping.

The chromatic aberration of galvanized seamless steel pipe is mainly caused by the intense reaction of iron and zinc, which makes the complete coating originally composed of alloy layer and pure zinc layer become only alloy layer without pure zinc layer.

The molten pool refers to the part of the base metal that is melted into a pool due to the heat of the welding arc. The geometrical liquid metal part formed on the weldment during welding is called the molten pool.

The factors of the rolling process are discussed here. The main influencing factors are: temperature, process adjustment, tool quality, process cooling and lubrication, removal and control of debris on the surface of rolled parts, etc.