Thick wall coiled pipe is made of steel plate. Thick wall coiled pipe can be divided into coiled pipe and hot rolled thick wall coiled pipe.
Steel plate materials mainly include Q235, Q345, 20 45, 35cimo and 42cimo, with 16 manganese and 16 manganese capacity. Generally, cold rolled plate can be used for pipe winding. Like oil, chemicals, natural gas transportation, piling and urban water supply, heating, gas supply and other projects can be customized! The required thickness and length can be adjusted as required! The rolling pipe weld is a double-sided weld. Two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.
.Mixed alloy (eutectic mixture): when the liquid alloy solidifies, Qinhuangdao thick wall steel plate coil, such as solder, bismuth cadmium solid melt alloy, and the alloy forming solid solution when the liquid alloy solidifies, such as gold and silver alloy; Many properties of alloys are better than pure metals, so alloys are mostly used in applied materials. The formation of alloys often improves the single element
In general, the radius of each point in the steel pipe is almost the same within the step range, and the steel pipe is preliminarily rounded. The second stage is the nominal inner diameter stage: the sector starts to reduce the movement speed from the front position until it reaches the required position, which is the inner circumference position of the finished pipe with quality requirements.
.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.
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 butt joint of coiled pipe (with the same wall thickness) shall not exceed 10% of the wall thickness and not more than 2mm.
The main problem of thick wall coiled pipe is welding. As long as flaw detection can be carried out, the requirements related to delivery are wider than other products. The detection of thick wall coiled pipe is mainly ultrasonic flaw detector.
Continuous pipe pressure perforation refers to the pressure perforation realized by punch (head) on the press. It belongs to stamping deformation. Large diameter steel pipe rolling can be divided into open and closed. Square billets (some round billets) or polygonal ingots are used for perforation. If the punched metal just fills the space between the pipe wall and the blank, the pressure perforation is an open perforation. If the punched metal is greater than the volume of the space, it is a closed perforation L.
Welding voltage because the welding arc is conical, and the welding voltage directly affects the length of the arc. Therefore, the general production process of thick wall continuous pipe can be divided into cold drawing and hot rolling. The production process of cold rolled seamless steel pipe is generally more complex than that of hot rolled steel pipe. First, the pipe must be subject to winding diameter test. If there is no response crack on the surface, the round pipe will be cut and the growth of the blank is about M. However, during annealing, and attention should be paid to whether there are a large number of bubbles on the surface. If a large number of bubbles appear, the quality of the steel pipe will not meet the response standard. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe, and the wall thickness is generally smaller than that of hot-rolled seamless steel pipe, but the surface is brighter than that of thick wall seamless steel pipe, the surface is not too rough, the diameter is not too prickly, and the strength is high. The manufacturer offers, operates in good faith, and has a real price. The same specification, thick wall continuous pipe, spot supply, and complete specifications,Q235B large diameter welded pipe, the arc length increases, the moving range of solder joint increases and the molten pool widens. If welding is carried out in a horizontal position, the weld width will be changed, but the edge transition of the weld will not be affected. However, the external welding of spiral welded pipe is carried out on the slope, and the molten weld metal will flow laterally under the action of gravity. We specialize in providing hot-rolled steel pipe, large-diameter thick wall continuous pipe, thick wall straight seam continuous pipe, steel casing and quality assurance of pipe rolling plant. During the preferential activities, new and old customers are welcome to consult. Therefore, the greater the welding voltage, the wider the weld pool, the more serious the transverse flow of weld metal, and finally lead to the bias of weld metal.
quality standard.: 90% of the developed thick wall coil processing industry is CNC 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 plasma cutting, 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 laser cutting and so on. Among them, but the cost is much lower than laser cutting. Therefore, since the successful development of the United States in the mid-1950s, plasma cutting has developed rapidly. Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory high pressure rating, good waterproof performance, fire and high temperature resistance, corrosion resistance, radiation protection and long service life. With the rapid development of computer and digital technology, NC cutting has also expanded and improved the processing 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 large-scale rolling pipe factory of rolling pipe, t-welded rolling pipe, flaw detection welding rolling pipe, 16Mn rolling pipe, Q345B rolling pipe and special-shaped rolling pipe, and the t-welded rolling pipe, 16Mn rolling pipe, Q345B rolling pipe and special-shaped rolling pipe produced by the rolling pipe factory are exported to major engineering buildings at home and abroad.
This measurement method overcomes the problem of steel
Steel plate materials mainly include Q235, Q345, 20, 45, 35cimo and 42cimo, with 16 manganese and 16 manganese capacity. Generally,Q345B reel, cold rolled plate can be used for pipe winding. Like oil, chemicals, natural gas transportation, piling and urban water supply, heating, gas supply and other projects can be customized! The required thickness and length can be adjusted as required! The rolling pipe weld is a double-sided weld. Two longitudinal welds are allowed, which is the abbreviation of hot rolled coil and the hot coil used here to connect with thick wall steel pipe is a verb, indicating a kind of behavior.
Quality inspection report.The pipeline installation sequence shall be adopted according to the principle of zoning and subsystem. First the lower level, then the upper level, and then the difficulty. In principle, the pipes connected to the machine are arranged from inside to outside to reduce the impact of welding stress on the installation accuracy of the machine. The joints of indoor and outdoor pipes shall be left outdoors. Q345B thick wall continuous pipe is a widely used carbon steel material. Q345B thick wall continuous pipe with thickness greater than 10mm is widely used in drainage engineering sewage pipeline, dredging pipeline, construction pipeline, etc. Q345B thick wall continuous pipe is a welded steel pipe product with relatively simple and flexible process. This kind of steel pipe is usually not in stock and is customized. If the quantity is small, the raw materials are not good. The main problem of Q345B thick wall continuous pipe is welding. As long as possible, delivery related requirements can be compared with other products.
The utility model overcomes the difficulties of large steel pipe volume, complex production site environment and inability to support the platform under the steel pipe. The measurement accuracy is within & plusmn;; Within 10mm, the repetition accuracy is & amp; amp; amp; le； 5mm. Thick wall continuous pipe is made of steel plate, which is divided into continuous pipe and hot-rolled thick wall pipe.
The steel plate coil adopts the secondary forming process. When rolling, first bend both ends of the steel plate, and the diameter shall be less than the diameter of the coiled pipe. Then adjust the bed pressure, rolling two to three times steel pipe coiled pipe welding and strengthening the rolling pipe joint, Q345B coil pipe Q235B coil pipe, large diameter thin wall tube, large diameter heavy wall coil pipe, stainless steel coil pipe, 16MN coil pipe and other brand products, designated products are complete, quality assurance. Then transported to the welding platform for welding.
.Today's equipment is double-sided submerged arc welding, because it goes without saying that double-sided welding is necessary here.
Generally, the wall thickness of the coiled pipe is 20mm and the outer diameter is 450-3000mm. It is directly welded, formed, rolled, butted,Q235B welded steel pipe, removed and reinforced from the steel plate. The coil pipe has the advantages of short processing time, fast delivery and low cost. The rolling pipe is mainly used for pipes, billboards, etc.