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.

Tempering is a heat treatment process in which a 20G high-pressure boiler tube quenched into martensite is heated to a temperature below the critical point, held for an appropriate time, and then cooled to room temperature.

Large-diameter thick-walled straight seam steel pipes are distinguished from small-diameter steel pipes. In fact, large-diameter steel pipes are mainly used in the pipeline industry, and these are used for work on some construction sites.