Q235B large di
Q235B welded pHowever, the disadvantages of manual cutting and cutting are also obvious, and the quality of the incision is very poor Big size error There is a great waste of materials The post-treatment process has large processing capacity and poor working conditions. Cutting with a forming machine can greatly improve the quality of the workpiece,Q345B thick wall coiled pipe, but the workpiece must be pre machined. It is not suitable for blanking of single chip, small batch and large workpiece. Although the semi-automatic cutting machine reduces the labor intensity, its function is simple and is only suitable for cutting two shapes. Due to the low cost of equipment, the above cutting is easy to operate compared with CNC cutting Easy to operate, so even in some large enterprises, it is still widely used in small and medium-sized enterprises.
Welding voltage because the welding arc is conical, and the welding voltage directly affects the length of the arc. Therefore, with the increase of welding voltage, the arc length increases, the moving range of arc spots expands the weld pool widens, and a wider weld formation will be obtained. If welding is carried out in a horizontal position, it will only change the width of the weld without affecting the edge transition of the weld. However, * eventually leading to the bias flow of weld metal. Coil products are not only rich in types, but also diversified in processing technology and molding. In most cases, after forming, the next process is to expand the diameter of the welded pipe blank to improve the quality of welded pipe shape. In other words, the expanding process has become an important process to ensure the quality of finished pipe in the production of large-diameter straight seam coiled pipe.
.Area calculation: outer wall area = 14 * D (outer diameter) * length, e.g. 100m 820 * 10 carbon steel coil, area = 14 * 0.82 * 100 = 25 48m2, area = 14 * (outer diameter thickness) * length,Q345B thick wall coiled pipe, e.g. 100m 820 * 10 carbon steel coil, area = 14 * (0.82-0.01 * * 100 = 25 2M2. It is known that the cost is calculated by multiplying the area by the unit price.
The process of thick wall straight seam coiled pipe is generally rolled. If the diameter required by the customer is particularly large, it is difficult for general machinery and equipment, so it is necessary to use coiled pipe. First, after the steel plate is rolled, then weld the two rolled steel pipes. The weld is also called T-welding. Sometimes, Therefore there may be two welds on a pipe body, also known as double welds. Thick wall straight seam coiled pipe has a wide range of materials. As long as it is a steel plate that can be ordered in a steel plant, it is basically OK. The main problem of the product is the welding quality. The welding quality directly determines the quality of the product, which is the main step in the thick wall rolling pipe. It is suitable for columns for bearing steel structures such as buildings, bridges, dams and offshore platforms, super long-span building structures and electric pole tower and mast structures requiring wind resistance and earthquake resistance.
.If the particle size of straight seam coiled pipe is too small, the adhesion and impact strength of the coating will be reduced. For serious internal pitting corrosion, but also remove corrosion products with small particles. Reasonable ratio design can not only slow down the speed of pipeline and nozzle (propeller) rinse agent. Wear and tear, and the rate of rinsing agent can be greatly improved. Generally, the particle size of metal particles is 2 - 9mm, and the particle size of metal sand is 1 - 2mm, of which 3 - 5mm is a common component. The sand shot ratio is usually 4 to 9.
In the process we mentioned, we need to explain each process such as groove. We need to compact both sides of the steel plate with indenter, so as to avoid the formation of peach shaped mouth in the rolling pipe.
The distance between the two longitudinal slits of the reel assembly shall be greater than 100mm. The distance between the outer wall of the branch pipe and the weld shall not be less than 50mm.
In order to make you better understand the installation method of coiled pipe, the following coiled pipe factory will introduce the installation method of coiled pipe: pipe hoop is used, and raw silk belt, white hemp wire, pipe expander, handle and other tools are used to connect coiled pipe and pipe fittings. This method may need repeated debugging due to the great influence of human factors. In addition, when the materials of coiled pipes and pipe fittings are different, due to their different thermal coefficients, leakage may occur when cold and hot water are used alternately.?
Introduction to the whole production process of steel plate coil: raw materials, i.e. steel strip coil thick wall large-diameter steel plate coil, welding wire and flux. Strict physical and chemical inspection shall be carried out before input.
The second stage is called the complex compensation stage, that is, the sector of the coiled pipe will gradually reduce its speed until it reaches the required position, which is the inner circumference position of the steel pipe before complex required by the process design. The second stage is the pressure maintaining and stability stage: the sector block remains stationary at the inner circumference of the steel pipe before re assembly, which is the pressure maintaining and stability stage required by the equipment and expanding process.
Excellent service.The rolling pipe factory mainly produces steel plate rolling pipe and thick wall rolling pipe. With the development of domestic economic situation and the acceleration of welding and casting trend, the advantage of NC cutting is 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 CNC cutting machines used in the thick wall rolling pipe processing industry are mainly flame and ordinary plasma cutting machines, but pure flame cutting can not meet the needs of modern production, most CNC cutting machines are CNC 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, mainly in
The wall thickness of hot coil thick wall continuous pipe is generally greater than 20mm, welded, formed, reinforced, flaw detected and delivered under the condition of steel plate heating. Sometimes the wall thickness is very special and needs secondary heating. It is characterized by small outer diameter tolerance and uniform wall thickness. The main reason is that the hot rolled thick wall continuous pipe will not damage the performance of raw materials. The disadvantages of hot rolled thick wall continuous pipe are long processing time and high cost. Hot rolled thick wall pipe is widely used: oil cylinder hydraulic, bridge roll, etc. Compared with seamless steel pipe, thick wall continuous pipe has the disadvantages of low cost, fast delivery, breaking the fixed specification of seamless steel pipe and so on. Thick wall coil is welded by bending steel plate or steel strip. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. It can be divided into ordinary welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe, welded thin-wall pipe, welded special-shaped pipe and spiral welded pipe. It is a special product manufacturing enterprise integrating research, development and service. It has long been specialized in hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing and rolling pipe factory. Continuous pipe is committed to producing all kinds of circumferential seam and longitudinal circumferential continuous pipe and penstock, and is reformed on the basis of the same specification and model of traditional rolling equipment. The function of parameters of coil welded steel pipe equipment is improved by 30%, which fills the gap that can not be produced by traditional rolling equipment. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm. The main materials are q23 q34 20, 16Mn, 16Mn, etc. the product standards are GB / t50205-200, GB / t3092-2001, etc. the products are widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heating, gas supply and other projects.
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.
It shows great advantages in 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. Today, let's discuss the packaging process of lower thick wall coil.
Sampling inspection.In addition, when the pipe rolling equipment is made, we should not have more than two longitudinal welds on the same cylinder section of the pipe rolling. For long-term pipe rolling, Q235B pipe rolling, large-diameter thin-wall pipe rolling, large-diameter thick wall pipe rolling, stainless steel pipe rolling, L360 pipe rolling and 16Mn pipe rolling, the products are complete,Q235B reel, the quality is excellent and the price is favorable. The distance between the two longitudinal welds should not be less than 200.
Area calculation: outer wall area = 14 * D (outer diameter) * length, e.g. 100m 820 * 10 carbon steel coil, area = 14 * 0.82 * 100 = 25 48m2, area = 14 * (outer diameter thickness) * length, e.g. 100m 820 * 10 carbon steel coil, area = 14 * (0.82-0.01 * * 100 = 25 2M2. It is known that the cost is calculated by multiplying the area by the unit price.
It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.
.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 steel plate rolling, assembly spot welding, campus, 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.
Gas and other projects.
Material used for steel plate coil: it is required to be explained by the user.