What Is The Difference Between Stainless Steel Welded Pipe And Seamless Steel Pipe?

1. Appearance to see the stainless steel pipe general program white and rust-free. Ordinary seamless steel pipe surface will have floating embroidery or reddish brown. Stainless steel corrosion resistance, finish is much better than ordinary steel pipe, etc..

2. Seamless steel pipe process is drawn, there is no welded seam, the material can be ordinary 20-gauge steel, can also be stainless steel; ordinary stainless steel pipe process is generally welded, the material is stainless steel.

Stainless steel seamless pipe is a kind of long steel with a hollow cross section and no seams around it. The thicker the wall thickness of the product, the more economic and practical it is, the thinner the wall thickness, its processing costs will rise substantially; the product process determines its limitations performance, the general seamless steel pipe precision is low: the wall thickness is not uniform, the tube inside the appearance of the brightness is low, the cost of sizing is high, and the inside appearance and the pockmarks, black dots is not easy to remove; it is the detection and shaping of must be processed offline. Therefore, it reflects its superiority in high-pressure, high-strength, mechanical structure materials.

   Welded steel pipe referred to as welded pipe, commonly used steel or steel strip through the unit and mold crimping and forming after welding made of steel pipe. Welded steel pipe production process is simple, high production efficiency, more varieties and specifications, less investment in equipment, but the general strength is lower than the seamless steel pipe Since the 1930s, with the rapid development of high-quality strip steel rolling production and the progress of welding and inspection technology, the quality of weld seams continue to improve, welded steel pipe varieties and specifications are increasing and in more and more areas, especially in the heat exchanger who back-up pipe, decorative pipe, medium and low-pressure In more and more areas, especially in the heat exchanger who spare tube, decorative tube, low and medium pressure fluid pipe, etc. instead of seamless steel pipe.

First, the nature of different

1, stainless steel welded pipe: is a hollow long round steel.

2, seamless steel pipe: made from the whole piece of metal, there is no seam on the surface of the steel pipe.

Second, different characteristics

1, stainless steel welded pipe: in the stainless steel pipe standard, Brinell hardness is the most widely used, often with the diameter of the indentation to indicate the hardness of the material, both intuitive and convenient. But for harder or thinner steel steel pipe is not applicable.

2, seamless steel pipe: according to the production method, seamless pipe is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe, top pipe and so on. According to the sectional shape, seamless steel pipe is divided into two kinds of round and shaped, and the shaped pipe has square, oval, triangular, hexagonal, melon, star, and a variety of complex shapes with finned pipe. The maximum diameter of 650mm, the minimum diameter of 0.3mm.

Third, different applications

1, stainless steel welded pipe: mainly widely used in petroleum, chemical, medical, food, light industry, machinery and instrumentation and other industrial piping, as well as mechanical structural components. In addition, in the bending, torsion strength is the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also commonly used for furniture and kitchenware.

2、Seamless steel pipe: Seamless steel pipe is mainly used as petroleum geological drilling pipe, petrochemical cracking pipe, boiler pipe, bearing pipe, and automobile, tractor, aviation with high precision structural steel pipe.