The difference between stainless steel welded pipe and stainless steel seamless steel pipe

by yane Yang Sales Manager

Stainless steel pipe is open on both ends and hollow section steel, according to the different production methods can be mainly divided into seamless stainless steel pipe and welded stainless steel pipes, the specifications of the stainless steel pipe with overall dimensions and wall thickness, pipe size range is very wide, from small diameter capillary until several meters in diameter, large diameter stainless steel pipe. The main purpose of stainless steel pipe is pipe, heat industry equipment, mechanical industry, petroleum geology exploration, container, chemical industry and so on.

Weld stainless steel pipe

Welded stainless steel pipe is simply welded pipe, which is stainless steel pipe with stainless steel plate or stainless steel strip. The production process of welding stainless steel pipe is simple, the production efficiency is high, the variety specification is much, the equipment investment is less, but the intensity is less than the seamless stainless steel pipe. And with the rapid development of high quality strip steel rolling production and the progress of welding and inspection technology, constantly improve the weld quality, varieties in the welding of stainless steel pipe is increasing, the improvement of quality can make replace seamless stainless steel pipe in many fields. Weld stainless steel pipe is divided into straight seam welded pipe and spiral welded pipe.

The production process is simple, the production efficiency is high, the cost is very low, so the development is fast. And the strength of the spiral weld pipe is straight seam welded pipe is high, can use a narrow billet production of larger diameter welded pipe, can also use the same width of billet in the production of different pipe diameter welded pipe. However, the weld length of the process increases by 30 to 100 percent, and the production rate is low compared to the same length. It is used in the small diameter welding pipe, and the spiral welding is used in the large-diameter welded pipe.

Standard of seamless stainless steel pipe

Seamless stainless steel pipe is a kind of hollow section, and the long strip of steel that is not in the vicinity of the pipe. Stainless steel hollow section, a large number of be used for conveying fluid pipe, such as oil, natural gas, coal gas, water and some solid materials, such as pipelines. Stainless steel pipe and stainless steel round steel compared to the solid steel such as in the bending torsional strength phase at the same time, the weight is lighter, is a kind of more economic cross section steel, a large number of used in manufacturing structure and mechanical parts, such as petroleum drill pipe, auto transmission shaft, bicycle frame and construction of steel scaffolding is used. Use stainless steel pipe manufacturing annular parts, can improve material utilization, simplifying the manufacturing process, material saving and processing time, such as rolling bearing ring, jack sets, etc., are now widely used to manufacture stainless steel pipe. Stainless steel pipe is also the indispensable material for all kinds of conventional weapons, the gun barrel, gun barrel, etc. Stainless steel pipe is divided into round and heteroid pipes according to the shape of cross-sectional area. Because the circle is the largest in terms of the circumference, more fluid can be carried by a round pipe. In addition, the force is more uniform under internal or external radial pressure, so most stainless steel pipes are round pipes.

But circular pipe has its limits, of course, in some situations, such as at the time of plane bending, pipe bending strength is not nearly as square, rectangular pipes, some agricultural machinery and skeleton, gangmu furniture commonly used square, rectangular pipe. Other cross-sectional stainless steel pipes are also used for various purposes.

Source: China Steel Pipes Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)