Spiral pipe is mainly used for conveying various water and steam media. It is generally used in the steam and hot water transportation of chemical industry and power plant. In recent years, with the improvement of production process of spiral pipe, the quality and technical indicators have been greatly improved, and it is also used in gas pipeline. Another use is a variety of building on the use of pipeline engineering, mainly used to transport cold and hot water! A small number of them are used in building components, such as high-rise buildings, pile foundations of river bridges. I know so much. I hope you can make up for it! Screw tube is also called low rib tube, which is mainly used to expand the heat transfer area by external rib (rib coefficient is 2-3). Generally, it is used in the occasions where the heat supply coefficient inside the tube is more than 1 times than that outside the tube. For condensation and boiling outside the tube, it also has a better strengthening effect due to the surface tension.
Production process of spiral steel tube:
Spiral steel pipe is a kind of spiral seam steel pipe, which is made of steel rolling plate as raw material, often extruded and welded by automatic double wire double submerged arc welding process
1. Raw materials are strip coil, welding wire and flux. Before putting into operation, they must pass strict physical and chemical tests.
2. Single wire or double wire submerged arc welding shall be adopted for butt joint of strip head and tail, and automatic submerged arc welding shall be adopted for repair welding after rolling steel pipe.
3. Before forming, the strip steel shall be leveled, cut, planed, cleaned, transported and bent.
4. The electric contact pressure gauge is used to control the pressure of the oil cylinder on both sides of the conveyor to ensure the smooth transportation of the strip steel.
5. Adopt external control or internal control roll forming.
How to choose high quality spiral steel tube?
The selection of spiral steel pipe should consider the operating conditions, such as manual operation or automatic operation, the performance and type of hot press, and the quality requirements for the pressed material, such as hardness, gloss, etc. In addition, economic accounting should be considered. The number of times to produce a slow quality decorative plate is required for each newly polished steel plate.
In addition, when selecting the most reasonable thickness of the steel plate, its service time, quality and rigidity shall be considered, as well as the strength requirements of the plate when it is pressed; heat conduction performance; pressure distribution and width specification of the pressing plate. If the thickness of steel plate is not enough, it is easy to bend, which will affect the production of decorative plate. If the thickness is too large and the steel plate is too heavy, it will not only increase the cost of the steel plate, but also bring difficulties in operation. At the same time, the allowance should be taken into account when processing or using the spiral steel pipe. There is no absolute consistency in the thickness of copper plate, but try to be consistent in the thickness of the same steel plate as far as possible. Generally, for sawboards of medium specification, the thickness tolerance is 0.05-o.15 mm. If the requirements are too strict, the grinding cost will also increase. Generally, it is a steel plate with high tensile strength and hardness. The greater the mechanical damage resistance, the longer the durability, but the higher the grinding cost.
