Because the production process of welded steel pipes is simple, the production efficiency is high, the varieties and specifications are many, and the equipment investment is low.
But the strength is generally lower than that of seamless steel pipe. Since 1930s, with the continuous rolling production of high-quality strip steel.
With the rapid development of welding and testing technology, the quality of weld is constantly improved, and the varieties of welded steel pipes are also increasing.
The specifications are increasing day by day, in more and more fields, especially in heat exchange, sanitary spare pipes, decorative pipes and medium and low pressure fluid pipes.
Instead of seamless steel pipes.