Stainless steel welded pipe, referred to as welded pipe, commonly used steel or steel strip after the unit and mold crimping forming welded steel pipe.
Welded steel pipe has the advantages of simple production process, high production efficiency, many varieties and specifications and less equipment investment, but its general strength is lower than that of seamless steel pipe.
According to the welding technology can be divided into automatic welding, manual welding.
Automatic welding is generally submerged arc welding, plasma welding, manual welding is generally argon arc welding.
First, the small diameter stainless steel welded pipe is continuous online production, the thicker the wall is, the greater the investment of the unit and the welding equipment, the less economical and practical it is.
The thinner the wall thickness, the lower the input-output ratio;
Secondly, the process of the product determines its advantages and disadvantages. Generally, the welded steel pipe has high accuracy, uniform wall thickness, high brightness of the inner surface of the pipe (the surface level of the steel plate determines the surface brightness of the steel pipe), and can be arbitrarily determined.
Therefore, it is economical and aesthetic in high precision, medium and low pressure fluid applications.
Since the 1930 s, with the rapid development of high quality strip steel rolling production and the progress of welding and inspection technology, constantly improve the weld quality, increasing varieties of welded steel pipe specifications, and in the field of more and more especially in heat exchange equipment with low pressure fluid in pipe, decorative, pipe instead of seamless steel tube.