The main difference between seamless steel pipe and welded steel pipe are molding process. General welded steel pipes such as water pipes, is generally flat plate by bending and welded together after that you can find a seam in the above; coarse diameter is usually spiral weld. The molten steel seamless pipe is generally through an annular slit molten state and then by stretching out the backlog of processing molding process, so there is no seam. In performance, especially compared to welded steel has greatly improved the bearing capacity, it is often being used for high-voltage equipment. Hydraulic equipment such as piping connections. Welded steel pipe weld area is its weak link, weld quality is also a major factor in its overall performance impact. Welded steel pipe lived in the north generally have had water pipes or heating pipes burst in the winter cold experience explosive place are generally weld.

Seamless steel pipe is piercing round holes to produce steel. Weld steel pipe is rolled into a bucket and then weld. According to their method of manufacturing seamless steel pipe and welded steel pipe in two. Seamless steel pipe with high-quality carbon steel or alloy steel, hot-rolled, cold-rolled (pull) of the points. Welded steel is rolled into a tube-shaped plate with the seam or spiral seam welded, in the manufacturing method, is divided into low pressure fluid welded pipe, spiral welded steel pipe, directly welded steel pipe, welded pipe. Seamless steel pipe can be used for a variety of liquids, gas pipelines. Welded pipes can be used for water pipes, gas pipes, heating pipes. Seamless steel tubes are used in important applications, uniform, high pressure tolerance, such as the barrel, the barrel and so on. Generally with high-quality steel, alloy steel and even. Weld steel are used in general purpose compression generally well tolerated, such as water pipes, gas pipes, etc., with ordinary steel.