Accurate comparison for manufacturing method of seamless steel pipe

Hot spinning, hot extrusion and hot piercing rolling would be three main forming methods for producing seamless steel pipe. How can we choose the method for manufacturing steel pipes? Let’s start from their features.

Hot spinning: With pressure taking, flat blank or pre molded blank is worked for rotating core rod. Finally, customers get thin-walled hollow rotary body products.

Advantage: High precision products, good mechanical properties, range size, simple producing tool, replacing easily, lower cost in production than other procedure.

Disadvantage: Long time for production, low yield, limited by length short size due to pipe processing equipment.

Hot extrusion: Billet machining pre-treatment before extrusion needs here.

Advantage: Low equipment investment, less waste in material, mature technology.

Disadvantage: Extruded tube diameter has to be below 100mm, and the corresponding control system to upgrade according to different diameters of the steel pipe.

Hot piercing rolling: With longitudinal rolling extension and cross rolling elongation method, it is widely used in producing seamless steel pipe.

Advantage: High production efficiency, lower metal consumption, high quality, advanced control system, less investment.

Disadvantage: Suitable for small batch not big number.

Choosing the right way to manufacturing the steel pipes according to the size, quantities of the steel pipe would be necessary!