Q345B welded steel pipeWhat to do to make it stronger

What is the manganese content of straight seam coiled pipe? The material of straight seam coiled pipe and an appropriate amount of manganese 1 can significantly improve the cold brittleness of straight seam steel pipe steel, increase the yield strength and tensile strength, reduce the plasticity and impact toughness, and do not be too large; 4 manganese has an effect on the removal of harmful element oxygen in steel; 5MN can also be used to synthesize high melting point (about 1600 ℃ much higher than the general processing temperature of steel), which is at high temperature in steel, so it can reduce the harmful effect of sulfur and lead to hot processing of steel. Sulfur cracked & ldquo; Hot crisp & rdquo; The phenomenon has decreased.

It is important that the thick wall coiled pipe will not damage the performance of raw materials. The disadvantage of hot roll thick wall rolling pipe is that the treatment time is long Very expensive. Thick wall rolling pipe is widely used: cylinder, hydraulic, bridge, roller, etc.

.The automation and mechanization level of large-diameter steel coil is not high, which requires a lot of manual treatment. The main problem of large-diameter coiled pipe is welding. As long as the flaw detection can be carried out, the delivery can be carried out. The relevant requirements are broader than other products.

The diameter of thick wall coiled pipe is usually higher than dn450. Thick wall coiled pipe is sometimes two welds. The reason why this happens is mainly due to the problems of raw materials and equipment processing. The steel plate with the required width of welded pipe required by the customer is usually not produced by the steel plant so two plates need to be welded, so the weld will occur.

.Weld size has a great influence on the quality of rolled steel pipe. Weld size mainly includes welding process parameters, welding wire shape and position parameters, flux flow, flux process performance and weld forming.

Diameter of rolled steel pipe: sometimes the diameter of the demand plan is different from that of the supplier.

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.?

The longitudinal weld of the same barrel part of the coiled pipe shall not be greater than 2.

Camera length measurement uses image processing technology to measure the length of straight seam steel pipe. The principle is that a series of equal distance photoelectric switches are installed on one section of the reel conveying roller, and a light source and camera are added to the other section. When the thick wall pipe passes through this area, the wall thickness of the coiled pipe is 20mm and the outer diameter is 450-3000mm. It is directly welded, formed, rolled, butted, fast delivery and low cost. The rolling pipe is mainly used for pipes, billboards, etc.

install.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.

Generally, the packaging process of thick wall coiled pipe mainly includes filling, wrapping, sealing and other processes, as well as related pre and post processes, such as cleaning,20# straight seam welded pipe, stacking and disassembly. Because it is used strictly, and the production shall be carried out according to the correct methods and principles. In addition, the process of thick wall rolling pipe also includes stamping on the package. The use of mechanical packaging products can improve productivity, reduce labor intensity and meet the needs of large-scale production. Thick wall coiled pipe is developed with the emergence of new packaging materials and the continuous innovation of packaging technology. It can show important value in different industries and fields.

Flame cutting and plasma cutting are commonly used for sheet metal blanking in our factory. The equipment used includes manual cutting, copier, no special supporting cutting equipment is required.

It has advantages and quality. The weld reinforcement obtained is increased, the weld formation is deteriorated and the edge transition is poor.

Excellent service.The detection of thick wall coiled pipe is mainly ultrasonic flaw detector, and the longitudinal weld on the same cylinder section of coiled pipe should not be more than two. Generally, the production process of thick wall 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 the pipe blank first. If the surface does not respond to the crack, the round pipe shall be cut by a cutter 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, with complete specifications,. The group of butt welds of coiled pipe shall be flush. When the nominal diameter is greater than, back sealing welding shall be carried out in the pipe. During pipe rolling processing, the surface damage of the plate shall be prevented. The factory has perfect steel plate coil, thick wall coil, T-shaped welding coil, flaw detection welding coil, 16Mn coil, Q345B coil special-shaped coil and other production lines. It is a coil factory that can produce large coils of various specifications and wall thicknesses. Our thick wall coil and large coil products are sold to large enterprises all over the country and are deeply trusted and praised by customers. Steel plate coil, thick wall coil coil, flaw detection welded coil, 16Mn coil and Q345B coil shall be carried out in strict accordance with ISO9001:2000 international quality management standards.

Adjust the temperature and composition of the key. Remove the dolomite blocking the steel opening with a lever steel drill, or open the D steel with an oxygen key port or a rocket opener according to the specific situation, that is, the hydrocarbon crushing of Newman effect. in order to

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,Q550b straight seam welded pipe,Q460b welded steel pipe, large-diameter thick wall rolling pipe, steel casing and rolling pipe factory. The designated products are complete and the quality is guaranteed. 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, 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. 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, 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 so-called expanding diameter actually belongs to the pressure processing technology that uses hydraulic or mechanical pressure to apply customized to the inside of the steel pipe, so as to expand the steel pipe outward along the radial direction. Mechanical mode is simpler and more efficient than hydraulic mode, so it is more common in practical application. In particular, it is adopted in the very advanced expanding process of several large-diameter straight seam rolling pipelines.

High. Hot rolled thick wall coiled pipe is widely used: oil cylinder, hydraulic pressure, bridge, roller, etc.

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.