Q355b thick wall welded pipeTechnology and promotion for accelerating overcapacity reduction

The volume of coiled pipe, Q235B coiled pipe,Q345B large diameter reel, Q345B coiled pipe, large-diameter thin-wall coiled pipe, large-diameter thick wall coiled pipe, stainless steel coiled pipe, L360 coiled pipe, 16Mn coiled pipe and other special products have increased accordingly. With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting have been gradually recognized. NC cutting not only greatly improves the rate of plate and product quality, 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, but pure flame cutting can not meet the needs of modern production. At present, 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, plasma 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, since the successful development of the United States in the mid-1950s, plasma cutting has developed rapidly. With the rapid development of computer and digital technology, NC cutting is also developing, 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, 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. 20 old brands price

Before starting up, it is necessary to check whether the hot coil machine operates normally and fill the oil hole with oil.

.Welded pipe: welded pipe. Definition of welded pipe: pipe with specified shape and size of steel strip

Have we learned about the packaging process of the steel used? Today, let's discuss the packaging process of lower thick wall coil.

.The steel plate or strip is bent and then welded to form a thick wall coil. According to the welding form, it is divided into straight seam welded pipe and spiral welded pipe. It is divided into ordinary welded pipe, galvanized welded pipe, wire sleeve, metric welded pipe, rolling pipe, deep well pump pipe, automobile pipe, transformer pipe, welded thin-wall pipe, welded pipe and spiral welded pipe. Coil pipe is dedicated to the production of, and is modified according to similar specifications of traditional rolling equipment. The function of increasing the parameters of spiral steel pipe equipment by 30% fills the gap that the original traditional rolling equipment can not produce. It can produce steel pipes with a diameter of 400 or more and a wall thickness of 8-100mm. The material mainly includes q23 q34 20#, 16 manganese, 16 manganese capacity, etc. Product executive standards include: GB / t50205-2001, GB / t3092-2001, etc. The products are widely used in petroleum, chemicals, natural gas transportation, pile driving, urban water supply, heating, gas supply and other projects.

Since the groove sizes of longitudinal and circumferential joints of hot-rolled pipes are different, it is necessary to confirm whether the inner side is upward before plate rolling to ensure the correctness of groove direction.

Pipe rolling is to form the steel pipe blank with a steel plate rolling machine, then weld it into steel pipe with submerged arc welding or electric welding, and then conduct sizing and forming on other forming equipment. This kind of pipe is single piece production with low efficiency, unstable pipe quality and low dimensional accuracy, but the equipment is simple and the investment is less. Longitudinal welded pipe equipment has high efficiency, good quality, high precision and good performance. It is the main equipment for large-scale production of steel pipes.

During the plate crimping process, the steel plate can be sandblasted to eliminate the iron oxide scale on the surface of the steel plate and ensure the raw materials on the cylinder surface during the processing process.

Steel plate rolling round production process: the production process of steel plate rolling round generally includes hot rolling, hot coil, casting and other production methods! Steel plate rolling is often seen in the production process of double-sided submerged arc welding. The products go through multiple processes such as welding, external welding, straightening and flat head. 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 are advanced in technology, strict in testing, more affordable and more preferential. Welcome to consult

Flame cutting and plasma cutting are commonly used for sheet metal blanking in our factory. The equipment used includes manual cutting, copier, semi-automatic cutting machine and NC cutting machine. Manual blanking is arbitrarily large compared to other cuts Flexible and convenient, no special supporting cutting equipment is required.

Application process.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,45# large diameter thick wall coiled pipe, acid should be used for 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,. With the increase of welding voltage, 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, new and old customers are welcome to consult. Therefore, the wider the weld pool, the more serious the transverse flow of weld metal, and finally lead to the bias of weld metal.

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, acid should be used for 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, 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, 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, thick wall straight seam continuous pipe, steel casing and quality assurance of pipe rolling plant. During the preferential activities, 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.

After, we should prevent the surface damage of the plate. The parts with serious scars must be grinded to make transition, and the wall thickness of the grinded part shall not be less than the design wall thickness. Steel rolling pipe is an unconventional pipe, and there is no domestic standard at present. Therefore, the inspection is mainly aimed at the thickness and weld quality.

, low cost. The rolling pipe is mainly used for pipes, billboards, columns, etc.

where.The butt joint of coiled pipe (with the same wall thickness) shall not exceed 10% of the wall thickness and not more than 2mm.

This is an indirect measurement, which measures the distance between the two ends of the steel pipe and their respective reference points, and indirectly measures the length of large continuous pipe. Long term hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory has no turnover to avoid price difference, and the price is 20% higher than the market price! The price of more than one ton is higher! A length measuring trolley is set at both ends of the steel pipe, with the initial position of zero and the spacing of L, and then the edited length is moved to the walking distance of each steel pipe end (L, l-l2-l are the length of the steel pipe).

Move the steel pipe twice to weld and reinforce the rolled pipe joint, and then transport it to the welding platform for welding.

.The main materials are q23q3420, 435cimo and 42cimo 16 manganese and 16 manganese capacity. Generally, cold rolled sheet can be used for pipe rolling, and the product standards are GB / t50205-200, GB / t3092-2001, etc. Continuous pipe is widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heat supply, gas supply and other projects.

The steel plate rolling pipe we call the steel plate rolling pipe is actually a process. The following small series will describe the process sequence: plate inspection, blanking, beveling, assembly spot welding, perimeter and roundness deviation inspection, welding, weld inspection, pipe test and delivery. Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing rolling pipe factory and other special products, old brands, price advantages and guaranteed quality. These processes can not be less.

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, acid should be used for annealing,Q345B large diameter thick wall coiled pipe, 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,. With the increase of welding voltage, 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.