Steel pipe is a type of hollow long steel, which is used as a pipe for conveying fluids, such as petroleum, natural gasoline, water, fuel, steam, and many others. In addition, seamless steel tube when the bending and torsional power are the identical, the weight is light, so it is also widely used. Used within the manufacture of mechanical elements and engineering structures. Also used to provide quite a lot of conventional weapons, barrels, shells and so on.
The seamless steel pipe is manufactured from a single piece of steel with no seams on the surface. Seamless steel pipe is mainly used as petroleum geological drilling pipe, cracking pipe for petrochemical business, boiler pipe, bearing pipe and excessive-precision structural steel pipe for automobile, tractor and aviation. (one time molding)
Welded pipe can be called welded steel pipe. It is a steel pipe made by welding and forming a steel plate or strip steel. It is normally 6 meters long. In keeping with the weld seam – straight seam welded pipe(ERW,LSAW), spiral welded pipe(SSAW). (after secondary processing)
In look, the seamless pipe and the welded steel pipe have a weld bead on the inner wall of the welded pipe, and are seamless.
The seamless pipe pressure is larger, the welded pipe is generally about 10 MPa, and now the welded pipe has been seamlessly processed. The seamless tube is formed once within the rolling. Welded steel pipes must be welded after rolling, and generally have spiral welding and straight welding.
Performance seamless pipe is healthier, after all, the worth can be high – some. The seamless steel pipe is formed by perforating a steel ingot or a solid tube clean, and then sizzling rolled, chilly rolled or structural steel chilly drawn. The seamless tube has a hollow part and is used in a big quantity as a conduit for transporting fluid. A welded pipe is a steel pipe which is welded and deformed into a round form by a steel strip or a steel plate and has a joint on the surface. The clean used for the welded pipe is steel plate or strip.
Identification method: Look inside the pipe, as a result of the skin shall be processed, the welded pipe has a hole inside, some may be seen, some are processed, it is not straightforward to see, you can contact slowly by hand, or look on the specifications, The welded pipes are relatively skinny. The welded pipes are made straight from the machine with stainless steel strips (rolled up), and the seamless is pierced with round steel or tube blanks.
Ordinary steel pipes, comparable to faucet water pipes, are usually welded by bending the flat plates. You can discover a weld on the top; the coarser diameter is usually a spiral weld. The seamless steel pipe is usually formed by laminating molten steel in a molten state through a ring slit and then being subjected to a stretching course of, in order that there isn’t any weld. In terms of performance, especially the strain bearing capacity is significantly improved in contrast with odd steel pipes, so it is usually used on excessive-voltage tools. Such as the piping connection of hydraulic tools. The weld seam
of bizarre steel pipe is its weak hyperlink, and the weld quality can be the principle factor affecting its general performance. People who have lived within the north generally have experienced the experience that the water pipes or heating pipes are frozen within the winter. The locations where the explosions are usually welded. The welded pipe shouldn’t be a seamless steel pipe.
The essential distinction between the two is that the welded pipe is generally decrease in strength than the seamless steel pipe. In addition, the welded pipe has many specifications and is inexpensive. Seamless steel pipes are generally used in the case of high use situations, corresponding to excessive temperature and strain, and have certain necessities for stress corrosion, and seamless steel pipes are used.
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