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Q345B large diameter thick wall welded pipeIncreasing environmental maintenance, the market trend has been mixed

announcer:hp709HP180518493 release time:2022-03-25 09:21:31

Continuous pipe products are widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heat supply, back sealing welding shall be carried out in the pipe. In the process of pipe rolling, the rolling quality of pipe, Q235B rolling, Q345B rolling, large diameter thin wall rolling, large diameter thick wall rolling, stainless steel rolling, L360 rolling and 16Mn rolling were analyzed. The offer is in progress. Welcome new and old customers to consult. Prevent surface damage of steel plate.

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, Q345B 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, such as bridge piling, seabed piling and high-rise building piling. Its material: Q345C. Q345D and Q345E are also used in low temperature areas.

Let me introduce the standard coil produced by steel plate. In the process of rolling, Q19 q23 q34 16Mn and the wall thickness of the ground part shall not be less than the design wall thickness.

.The offer is in progress. Welcome new and old customers to consult. Prevent surface damage of steel plate. Thick wall coil and large diameter coil are mainly made of carbon steel, etc. coil is a kind of welded pipe product with simple and flexible process. If the length required by the customer is special, two or more steel pipes must be connected. Therefore, the process of this welded pipe is flexible, convenient and applicable. The disadvantage is that it can not be produced by mechanized line. The level of automation and mechanization is not high, which requires a lot of manual processing. The main problem of coiled pipes is welding. Thick wall coiled pipes can be delivered as long as they can be inspected by flaw detection. The relevant requirements are broader than other products.

During pipe rolling, the surface damage of steel plate shall be prevented. The parts with serious scratches must be polished for transition, and the wall thickness of the polished parts shall not be less than the design wall thickness.

Service specification of coiled steel pipe: there are spiral welded pipe and seamless pipe, and the pressure resistance of gas and water is different.


Q345B large diameter thick wall welded pipeIncreasing environmental maintenance, thick wall rolling pipe has the disadvantages of low cost, rapid delivery, breaking the fixed specification of seamless steel pipe, etc. Thick wall coiled pipe is made of steel plate or steel strip by bending and then welding. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. According to the purpose, it is divided into general welded pipe, galvanized welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welding thin-wall pipe, electric welding special-shaped pipe and spiral welded pipe. Rolling pipe is committed to producing all kinds of rolling pipes and steel penstocks with circumferential seam and longitudinal ring, and is reformed on the basis of similar specifications and models of traditional rolling equipment. The function of improving the parameters of the rolling and welding steel pipe equipment by 30% fills the gap that the original traditional rolling equipment can not produce. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm. Materials mainly include q23 q34 20#, 16 manganese, 16 manganese capacity, etc. Product executive standard: GB / t50205-200, GB / t3092-2001, etc. The products are widely used in petroleum, chemical industry, natural gas transportation, pile driving and urban water supply, heating, 20#, 35#, 45# called ordinary steel pipes. Sometimes thick wall coiled pipes have two welds. Why this happens is mainly due to the problems of raw materials and equipment processing. Professional projects include: hot rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory and other related businesses. Merchants who hope to have this business please. The steel plate with the required width of welded pipe required by customers is generally not produced by the steel factory, so the two plates must be welded, the delivery can be carried out. The relevant requirements are broader than other products. 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. 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. High cost. Hot rolled thick wall coiled pipe is widely used: oil cylinder, hydraulic pressure, bridge, roller, etc& amp; amp; quot; Compared with seamless steel pipe, thick wall coil has the disadvantages of low cost, rapid delivery, breaking the fixed specification of seamless steel pipe, etc. Quality department 3 editing of welding process and welded pipe type thick wall coiled pipe is made of steel plate or steel strip after bending and then welding. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. According to the purpose, it is divided into general welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe electric welding thin-wall pipe, electric welding special-shaped pipe and spiral welded pipe. Objective knowledge packaging strategy thick wall steel plate coil - thick wall steel plate coil price thick wall coil is formed by bending steel plate or steel strip, and the electrical model is<p>The volume of coiled pipe, Q235B coiled pipe, 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, 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, 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. 20 old brands, price<p>Marketing Department.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, welded thin-wall pipe, welded pipe and spiral welded pipe. Coil pipe is dedicated to the production of, longitudinal ring coil pipe and steel pressure pipe, 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, chemicals, natural gas transportation, pile driving, urban water supply, heating, gas supply and other projects.<p>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.<p>, low cost. The rolling pipe is mainly used for pipes, billboards columns, etc.<p></p><p><br/></p><p><p><img src=



Generally, the wall thickness of the coiled pipe is 20mm and the outer diameter is 450-3000mm. It is directly welded, formed, rolled, butted, 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.

Recommendation and consultation.In progress, welcome to consult. Large diameter welded pipe, etc.

With the increase of arc length the range is expanded, the weld pool is widened, and a wider weld formation will be obtained. If welding is carried out in a horizontal position only the width of the weld will change without affecting the edge of the weld. Over external welding is carried out on a slope, and the molten weld metal will flow laterally under the action of gravity. It can be seen that the greater the welding voltage and the wider the weld pool, the more serious the weld metal will develop, * and eventually lead to the bias current of weld metal.

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.

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

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.

It is to preheat rather than increase the line energy. Reel needs quality, honest business! Let's talk about our productivity.