For stainless steel welded pipes and stainless steel seamless pipes, although they are both stainless steel pipes, they are very different. There is a gap in the application field, and the use determines the material, process, surface, etc. of the two.
For stainless steel welded pipes and
stainless steel seamless pipes, although they are both stainless steel pipes, they are very different. There is a gap in the application field, and the use determines the material, process, surface, etc. of the two.
Stainless steel welded pipe, also called stainless steel decorative pipe, stainless steel product pipe, is a welding method. The raw material is steel strip. The steel strip is welded and there will be a weld on the inner wall. Stainless steel seamless pipe is usually called industrial pipe, which is cold steel pipe. In the rolling or cold drawing process, the raw material is round steel. The round steel is perforated into a tube blank, and then the tube blank is cold rolled or cold drawn one after another.
Seamless steel pipes are mainly industrial steel pipes. Since they are industrial pipes, the surface requirements are not strict and there will be less obvious spots. Stainless steel decorative pipes are widely used, mainly in decoration, landscape engineering, furniture products and other fields
If stainless steel decorative pipes are used indoors, they are generally made of 201 or 304 stainless steel. In harsh outdoor environments or in coastal areas, 316 materials are used, as long as the environment is not prone to oxidation and rust; industrial pipes are mainly used for fluid transportation and replacement. Heat, etc., so the pipes have certain requirements for corrosion resistance, high temperature resistance, pressure resistance, etc. Generally, 304, 316, 316L corrosion-resistant 300 series stainless steel materials are used;
Stainless steel decorative tubes are normally bright tubes, and their surfaces are normally matte or mirror-like. In addition, decorative tubes also use electroplating, baking, spraying and other processes to give them a brighter color on their surfaces; industrial tubes' surfaces are normally acid white, that is, For pickled surfaces, the surface requirements are not strict, the wall thickness is uneven, the brightness of the inner and outer surfaces of the tube is low, and the cost of fixing the size is high. There should be pits and black spots on the inner and outer surfaces, which are difficult to remove.
Stainless steel decorative pipes are for decoration as the name suggests. They are normally used for balcony protective windows, stair handrails, bus stop handrails, bathroom clothes drying racks, etc.; industrial pipes are normally used in industry, such as boilers, heat exchangers, mechanical parts, sewage pipes, etc. However, because its thickness and pressure resistance are much higher than decorative pipes, it is widely used in pipelines for transporting fluids, such as water, gas, natural gas, oil, etc.
In recent years, with the rapid development of high-quality stainless steel continuous rolling production and the advancement of stainless steel welding inspection technology, the welding quality has continued to improve, the types and specifications of welded stainless steel decorative pipes have continued to increase, and many products can replace stainless steel seamless pipes.
