Thick wall coiled pipe is made of steel plate. Thick wall coiled pipe can be divided into coiled pipe and thick wall coiled pipe. The wall thickness of coiled pipe is 20mm and the outer diameter is 450-3000mm. It is rolled welded, formed, butted, removed and reinforced directly from the steel plate. Coil pipe processing time is short and delivery is fast Low cost. The rolling pipe is mainly used for pipes, billboards, columns, etc.
The arc length of the coil calibration template shall be 1 / 6 ~ I of the circumference of the pipe / the gap between the template and the pipe. What is the manganese content of the straight seam coil? Q345B coil, manganese is a common element in structural steel. Manganese in carbon steel is mainly added to the steel water as deoxidizer in the steelmaking process, usually in the range of 0.3-0.8%. In low alloy steel, manganese is a mixed alloy element, and the manganese content in 16Mn steel and 15MnV steel is 2-6%.
.The cold deformation process is adopted for the sizing of thick wall rolling pipe end. The commonly used sizing includes punch expanding and punch expanding + sizing ring compression. It has long provided various hot rolled steel pipes, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, on-site settlement and honest operation for individuals and enterprises all over the country. There are offices in various places, which can cooperate for a long time. When punch expanding, it can reduce the ovality of steel pipes The effect depends on the uniformity of steel pipe wall thickness. For hot-rolled pipes with serious uneven wall thickness, such as steel pipe rolled by periodic pipe mill (see pipe rolled by periodic pipe mill), the thick wall coil deteriorates after punch expanding. Therefore, in order to eliminate the influence of uneven wall thickness and reduce the ovality of steel pipe, punch expanding + sizing ring compression method should be adopted.
Application of hot rolled steel pipe: the disadvantage of changing hot rolled steel pipe into seamless steel pipe with fixed specification and model is another major feature of hot rolled steel pipe. In the production process, hot rolled steel pipe has been widely used, especially in large equipment such as oil cylinder production, bridge construction, engineering column, large drum and so on. Save materials and labor for the above enterprises, reduce production costs, improve the market competitiveness of finished products, and promote the development of enterprises to a certain extent. Continuous pipe is committed to producing all kinds of circumferential seam longitudinal circumferential continuous pipe and penstock, and is reformed on the basis of the same specification and model of traditional pipe rolling equipment. The function of parameters of pipe rolling equipment is improved by 30%, which fills the gap that can not be produced by traditional steel rolling equipment. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm.
.With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting are gradually recognized. It has long provided various brand products such as hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, but also improves the working environment and labor efficiency. At present, the NC cutting machines used in the thick wall coil processing industry are mainly flame and ordinary plasma cutting machines, most NC cutting machines are NC plasma cutting machines. This type of cutting machine can meet the needs of thick wall coiled pipe plate processing and thick wall coiled pipe parts processing, so the demand will be greater and greater, but there is still a very obvious gap with foreign countries, which is mainly reflected in: 90% of the developed thick wall coiled pipe processing industry is digital control cutting machine, and only 10% is manual cutting; The CNC cutting machine only accounts for part of the total blanking. 10%, of which the proportion of NC plasma cutting is small. In industrial production, the thermal cutting of thick wall coiled pipe generally includes gas cutting, laser cutting and so on. Among them, plasma cutting has a wider cutting range than gas cutting More efficient. Fine plasma cutting technology is close to laser cutting in material cutting surface quality, but the cost is much lower than laser cutting. Therefore, plasma cutting has developed rapidly. With the rapid development of computer and digital technology, which improves the machining accuracy. It shows great advantages in saving materials and improving labor productivity. This leads to the development of plasma cutting technology from manual or semi-automatic to NC, which has become one of the main directions of NC cutting technology. NC plasma cutting technology is a set of high-tech technologies such as NC technology, plasma cutting technology and inverter power supply technology. Its development is based on the common progress of computer, plasma arc characteristic research, power electronics and other disciplines. The CNC cutting technology began in the 1980s, and the CNC plasma cutting technology was later. However, recently, some domestic universities, research institutes and manufacturers have studied NC plasma cutting technology and gradually developed and produced various specifications of NC plasma cutting equipment, narrowing the gap of foreign advanced technology.
The quality of steel rolling pipe is greatly affected by the size of weld, mainly including welding process parameters, shape and position parameters of welding wire, flux flow, flux process performance, forming joint and other comprehensive factors.
Hot melt installation: pipes are connected according to the nature of thermoplastic coiled pipes. During hot melt, special heating equipment (generally electric heating type) is used to make the connecting surface of coiled pipes of the same material and pipe fittings reach the molten state, and they are pressed together manually or mechanically. This method is closely combined, safe and durable, and avoids water running, dripping and leakage at the joint of metal pipe fittings.
The wall thickness of general coiled pipe is 20mm and the outer diameter is 450-3000mm. It is made of steel plate by direct rolling, welding and forming. The production process of general thick walled coiled pipe can be divided into cold drawing and hot rolling. The production process of cold rolled seamless steel pipe is generally more complex than hot rolling. Roll sizing test shall be carried out for pipe blank first. If there is no response crack on the surface, Cut into blanks about meters in length. However, when entering the annealing process, acid shall be used for annealing, and attention shall be paid to whether a large number of bubbles are generated on the surface. If a large number of bubbles are generated, it indicates that the quality of steel pipe can not meet the response standard. In appearance, the cold-rolled seamless steel pipe is shorter than the hot-rolled seamless steel pipe and its wall thickness is generally smaller than that of the hot-rolled seamless steel pipe, but the surface is brighter than that of the thick wall seamless steel pipe. There is not too much roughness on the surface, and there are not too many burrs in the diameter. The thick wall coiled pipe is a powerful manufacturer, quotation, honest operation, genuine and of the same quality. The thick wall coiled pipe is available from stock with complete specifications,. Docking and strengthening. Coil pipe processing time is short and delivery is fast Low cost. The rolling pipe is mainly used for pipes, billboards, columns etc.
The straightening of thick wall coil pipe is to enter the inlet roller table of the straightener from the upstream roller table. When the head of thick wall coiled pipe is sensed by the middle position sensing element of the inlet roller table, the roller table decelerates; When the head of the thick wall coiled pipe is sensed by the position sensing element at the end of the inlet roller table, the inlet roller table section falls, and the closing delay of the inlet quick opening cylinder starts timing; When the pipe head enters the middle position of the inlet straightening roll, the inlet quick opening cylinder is closed, the thick wall coil is bitten in, the professional hot-rolled steel pipe, large-diameter thick wall coil thick wall straight seam coil, steel casing, the performance of the coil factory is stable, safe, and the technical level has reached the domestic level and the advanced level of similar products in the world. At the same time, the roller table at the inlet section falls. The second is the setting of quick opening cylinder delay. When the pipe head enters the middle position between the intermediate roll and the outlet roll, the quick opening cylinders of the intermediate roll and the outlet roll are closed one after another, and the rolling pipe, Q235B rolling pipe, Q345B rolling pipe, large-diameter thin-wall rolling pipe, large-diameter thick wall rolling pipe, stainless steel rolling pipe, L360 rolling pipe and 16Mn rolling pipe ensure the quality. Your satisfaction is our pursuit! Welcome to inquire. Thick wall coil enters the straightening process.
Service specification of coiled steel pipe: there are spiral welded pipe and seamless pipe, and the pressure resistance of gas and water is different.
Excellent quality.Sealing and sealing shall be carried out in the pipeline. The wall thickness of general coiled pipe is 20mm and the outer diameter is 450-3000mm. The production process of general thick walled coiled pipe can be divided into cold drawing and hot rolling directly from the production process of steel plate rolling and general thick walled coiled pipe. The production process of cold-rolled seamless steel pipe is generally more complex than hot rolling. Roll sizing test shall be carried out for the pipe blank first. If there is no response crack on the surface, the round pipe shall be cut by cutting machine and cut into a blank with a length of about meters. However, when entering the annealing process, acid shall be used for annealing, and attention shall be paid to whether a large number of bubbles are generated on the surface. If a large number of bubbles are generated, it indicates that the quality of steel pipe can not meet the response standard. In appearance, the cold-rolled seamless steel pipe is shorter than the hot-rolled seamless steel pipe, and its wall thickness is generally smaller than that of the hot-rolled seamless steel pipe, but the surface is brighter than that of the thick wall seamless steel pipe. There is not too much roughness on the surface, and there are not too many burrs in the diameter. The thick wall coiled pipe is a powerful manufacturer, quotation, honest operation, genuine and of the same quality. The thick wall coiled pipe is available from stock,. Welding, forming, butt joint and pipe rolling with short processing time, fast delivery and low cost, are mainly used for hot-rolled thick wall coils such as pipes, billboard and columns. The thickness of hot-rolled thick wall coils is generally greater than 20mm and the outer diameter is 450-3000mm. The hot-rolled thick wall coils are rolled under the heating of steel plates Welding, forming, deburring, defect detection and delivery. Sometimes the wall thickness is relatively thick and secondary heating is required. The feature is that the outer diameter tolerance is small Uniform wall thickness. It is important that the hot rolled thick wall coil will not damage the properties of raw materials. The disadvantages of hot roll thick wall rolling pipe are long processing time and. Professional hot-rolled steel pipe, large-diameter thick wall coil, thick wall straight seam coil, steel casing, coil factory inspection is strict, quality assurance. Preferential activities are in progress, welcome to consult. Hot-rolled thick wall coil is widely used: cylinder block, hydraulic pressure, bridge, roller table, etc.
Diameter of rolled steel pipe: sometimes the diameter of the demand plan is different from that of the supplier.
The convex hull on the surface of the crimp roll shall be treated. Before repeated processing, the equipment surface shall be treated to prevent the convex hull steel plate with abnormal roll surface from causing pits.
It should be noted that in practice, it is difficult to achieve the ideal proportion of metal sand and metal ball in the rinsing agent, because the hard and brittle metal sand has a higher crushing rate than the metal ball. For this reason, the mixture should be sampled continuously and the mixed rinse should be tested. According to the particle size distribution, the new rinse agent is added to the cleaning machine, and the amount of metal sand is usually the same in the new rinse agent.
Create brilliance.The influence of welding process parameters on welding current mainly includes two aspects: according to the production characteristics of spiral steel pipe, small welding current is usually used for internal welding
After cutting into a single steel plate coil, the head and root of each batch of steel plate coil shall be subject to strict first inspection, including the mechanical properties, chemical composition, fusion status of the weld, and the nondestructive testing of steel plate coil. Only after the pipe making process is qualified can it be officially put into production.
Hot rolled steel pipe is a kind of thick wall steel pipe rolled under the condition of heating the steel plate.
.The continuous pipe has good characteristics and performance in use, and advanced technology is adopted. If we want to make progress and enhance competitiveness, we must have a good opportunity at present. Just like the development of the iron and steel industry, there is still a certain gap with the international advanced level in terms of technical equipment accounting for more than 1 / 4 of the world's output, product quality and product grade, enterprise economic scale and main technical and economic indicators. The coil adopts PLC automatic system, and each part is operated on the panel. The cutting length of winding tube adopts photoelectric induction, accurate positioning and automatic cutting. Each process adopts double pump oil pressure system to ensure stable operation. The pipe rolling has different application ranges: winding pipe length: 0-1400mm, winding pipe thickness: 2-15mm, winding pipe diameter: 20-200mm, purpose: 3 inches x24x, working voltage: 380V, 50Hz. It can be used according to the specified parameters and scope, so as to ensure that it can play an important role and value in use. Large coil is durable, stable and easy to operate. The packaging process of coil includes filling, packaging, sealing and other main processes, as well as relevant pre and post processes such as cleaning, stacking and disassembly. In addition the rolling process also includes measuring or stamping on the package. Using mechanical packaging products can improve productivity, reduce labor intensity, meet the needs of large-scale production and meet the requirements of cleanliness and hygiene. With the emergence of new packaging materials and the continuous innovation of packaging technology, spiral pipe can play an important role and value in different industries and fields.
Hot rolled steel pipe is a kind of thick wall steel pipe rolled under the condition of heating the steel plate.
It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.