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Principle of automatic butt welding machine for steel pipe
The preheating flash welding process: before the continuous flash welding is stopped, the welding machine is preheated to the reinforcing steel. Clamp the steel bar on the jaw of the butt welder. After the power is turned on, the open end is used to make the end face of the steel bar smash with l...Read more -
How to choose a high-quality seamless steel pipe manufacturer?
Most industries have relatively high requirements for seamless steel pipes, and steel pipes need to be purchased in batches during construction. Naturally, it is still necessary to measure the price and pay attention to the choice of manufacturers. So how to choose a high-quality seamless steel p...Read more -
Hot-expanded seamless steel pipe manufacturing process – cross rolling
Cross rolling is a rolling method between longitudinal rolling and cross rolling. The rolling of the rolled piece rotates along its own axis, deforms and advances between two or three rolls whose longitudinal axes intersect (or incline) in the same direction of rotation. Cross rolling is mainly u...Read more -
Cross-rolling piercing process and quality defects and their prevention
The cross-rolling piercing process is the most widely used in the production of seamless steel pipes, and was invented by the German Mannesmann brothers in 1883. The cross-rolling piercing machine includes two-roll cross-rolling piercing machine and three-roll cross-rolling piercing machine. The ...Read more -
Surface processing defects of seamless tubes and their prevention
Surface processing of seamless tubes (smls) mainly includes: steel tube surface shot peening, overall surface grinding and mechanical processing. Its purpose is to further improve the surface quality or dimensional accuracy of steel tubes. Shot peening on the surface of seamless tube: Shot peenin...Read more -
Factors affecting the quality of seamless tubes
There are two categories of factors that affect the quality of seamless tubes: steel quality and rolling process factors. Many factors of the rolling process are discussed here. The main influencing factors are: temperature, process adjustment, tool quality, process cooling and lubrication, remov...Read more