Seamless Stainless Steel Tubing

seamless stainless steel tubing production-manufacturing

Manufacturing method

According to different production methods can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe and so on.

1.1, hot rolled stainless steel seamless pipe is generally produced on the automatic tube rolling unit. After checking and removing the surface defects, the solid tube blank is cut into the required length, centered on the perforated end face of the tube blank, and then sent to the heating furnace for heating, and perforated on the perforating machine. In the perforation at the same time continuously rotating and advancing, under the action of the roll and the head, the inside of the tube blank gradually formed a cavity, called the capillary. It is then sent to the automatic tube mill to continue rolling. Finally, the wall thickness of the whole machine is adjusted, and the diameter is determined by the sizing machine to meet the specification requirements. It is an advanced method to produce hot-rolled seamless steel pipe with continuous tube rolling unit.

1.2, if you want to obtain a smaller size and better quality seamless pipe, you must use cold rolling, cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-high mill, in which steel pipes are rolled in a ring pass consisting of a variable circular groove and a stationary conical head. Cold drawing is usually carried out on a single or double chain cold drawing machine of 0.5 ~ 100T.

1.3. The extrusion method is to place the heated tube blank in the closed extrusion cylinder, and the perforating rod moves with the extrusion rod to make the extrusion part extruded from the smaller die hole. This method can produce steel pipes with smaller diameters.

This kind of steel pipe can be divided into stainless steel seamless steel pipe and stainless steel welded steel pipe (welded pipe) two categories, according to the different manufacturing process can be

For: hot rolling, extrusion, cold drawing and cold rolling these basic types, according to the section shape can be divided into round pipe and shaped pipe, widely used is round steel pipe, but there are also some square, rectangular, semicircular, hexagonal, equilateral triangle, octagonal and other shaped stainless steel pipe.

stainless steel seamless application area

With the implementation of China's reform and opening policy, the national economy has been growing rapidly, and a large number of urban housing, public buildings and tourist facilities have been built, which puts forward new requirements for hot water supply and domestic water supply. Especially the problem of water quality, people pay more and more attention to, and the requirements are constantly improving. Galvanized steel pipe this commonly used pipe because of its corrosivity, under the influence of relevant national policies, will gradually withdraw from the historical stage, plastic pipe, composite pipe and copper pipe has become the commonly used pipe of pipeline system. However, in many cases, stainless steel pipes are more advantageous, especially thin-walled stainless steel pipes with a wall thickness of only 0.6 ~ 1.2mm in high-quality drinking water systems, hot water systems and water supply systems that put safety and health first, which have the characteristics of safety and reliability, health and environmental protection, and economic applicability. It has been proved by domestic and foreign engineering practice that it is one of the new, energy-saving and environmentally friendly pipes with the best comprehensive performance of the water supply system, and it is also a very competitive water supply pipe, which will certainly play an incomparable role in improving water quality and improving people's living standards.

In the building water supply system, due to the galvanized steel pipe has ended a hundred years of brilliant history, a variety of new plastic pipes and composite pipes have been rapidly developed, but there are still some deficiencies in various degrees of pipe, far from fully adapt to the needs of the water supply system and the country's requirements for drinking water and related water quality. Therefore, relevant experts predict that building water supply pipes will eventually return to the era of metal pipes. According to the application experience of foreign countries, the thin-walled stainless steel pipe is identified as one of the pipes with the best comprehensive performance

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