Q460b straight seam welded pipeMarket price continued to rise

Cold rolled thick wall continuous pipe is similar to cold rolled thick wall continuous pipe, with wall thickness of 20mm and outer diameter of 450-3000mm. Steel plate is directly rolled welded, formed, butted and reinforced. Cold rolled thick wall pipe has the characteristics of short processing time, fast delivery and low cost. Cold rolled thick wall pipe is mainly used for: pipe, billboard, column, so the two plates must be welded, so this kind of weld occurs. The main problem of thick wall 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 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, 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, with the electrical model of 031 inspection 8517611 standard, and then made by high-frequency welding and submerged arc 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,20# large diameter thick wall coiled pipe, coil, Q235B coil, Q345B coil, large-diameter thin-wall coil,45# large diameter thick wall coiled pipe, large-diameter thick wall coil, stainless steel coil, L360 coil and 16Mn coil. The inspection is strict and the quality is preferential

.The parts with continuous acoustic flaw detection marks on the weld shall be rechecked by manual ultrasonic and X-ray. If there are defects, after repair, they shall be subject to nondestructive inspection again until it is confirmed that the butt weld of strip steel and the pipe of T-joint intersecting with spiral weld have all passed the X-ray television or film. Each steel plate coil has passed the hydrostatic test, and the pressure adopts radial sealing. The test pressure and time are strictly controlled by the microcomputer detection device of steel plate rolling pipe water pressure. Why are there two longitudinal welds in the same pipe section of rolling pipe?

Electric fusion connection: when the pipe fittings leave the factory, the resistance wire is buried in the pipe fittings to make electric fusion pipe fittings. At the construction site, only the plug of the special welding instrument and the socket of the pipe fittings need to be connected. The inner body of the pipe fittings melts the outer plastic of the pipe fittings and the inner plastic of the pipe fittings to form a reliable connection, and combines the timing methods such as special digital timekeeper and installation indicator hole.

.When the nominal diameter is greater than or equal to 600mm, back welding shall be carried out in the pipe.

In general, the hot coil pipe is mainly committed to the production of all kinds of circumferential seam and longitudinal ring coils and steel penstocks. It is reformed on the basis of traditional coil equipment and similar specifications and models, so that all parameters of the hot coil pipe can be improved, filling the gap that the original traditional coil equipment can not produce. In addition, in terms of processing technology, the hot coil pipe needs attention. The following matters are required: before processing, the hot coil pipe needs to be familiar with the technical requirements of paper, process material properties and other related aspects, select an appropriate hot coil machine, determine whether the cold coil, warm coil or hot coil, and then operate.

Hot melt installation: pipes are connected according to the nature of thermoplastic coiled pipes. During hot melt, and they are pressed together manually or mechanically. This method is closely combined, safe and durable, and avoids water running, emitting, dripping and leakage at the joint of metal pipe fittings.

Main technical measures for low hardening trend

The purpose of pipe end sizing is to reduce the ellipticity of thick wall coiled pipe and ensure the dimensional accuracy of thick wall coiled pipe after machining. It is mainly used for oil casing. The number of casing after end sizing is less, and the number of missing threads on the end can improve the yield.

The latter stage is called unloading regression. At this time, the sector continues to retract from the circumferential position of the rewind pipe before rewinding, and will eventually reach the initial expanding position which is the small shrinking diameter of the sector required by the expanding process. In practical application, the three steps can be combined and simplified in the process simplification, which has no impact on the expanding quality of steel pipe. How to calculate the weight per meter of steel coil? Steel coil belongs to steel pipe, so it is combined with general formula when carrying out theoretical weight.

Variable cost.Material used for steel plate coil: it is required to be explained by the user.

The continuous pipe has good characteristics and performance in use, and advanced technology is adopted. If we want to make progress and enhance competitiveness, we must have a good opportunity at present. Just like the development of the iron and steel industry, although the pipe rolling industry has made remarkable achievements in recent years, accounting for more than 1 / 4 of the world's output, product quality and product grade, enterprise economic scale and main technical and economic indicators. The coil adopts PLC automatic system, and each part is operated on the panel. The cutting length of winding tube adopts photoelectric induction, accurate positioning and automatic cutting. Each process adopts double pump oil pressure system to ensure stable operation. The pipe rolling has different application ranges: winding pipe length: 0-1400mm, winding pipe thickness: 2-15mm, winding pipe diameter: 20-200mm, purpose: 3 inches x24x, working voltage: 380V, 50Hz. It can be used according to the specified parameters and scope, so as to ensure that it can play an important role and value in use. Large coil is durable, stable and easy to operate. The packaging process of coil includes filling, packaging, sealing and other main processes, as well as relevant pre and post processes such as cleaning, stacking and disassembly. In addition, the rolling process also includes measuring or stamping on the package. Using mechanical packaging products can improve productivity, reduce labor intensity, meet the needs of large-scale production and meet the requirements of cleanliness and hygiene. With the emergence of new packaging materials and the continuous innovation of packaging technology, spiral pipe can play an important role and value in different industries and fields.

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

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.

packing.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, 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 thickness of thick wall coiled pipe is generally greater than 20mm, rib, defect detection, 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, t-welded coil, flaw detection welded coil, 16Mn coil and Q345B coil shall be carried out in strict accordance with ISO9001:2000 international quality management standards.

The wall thickness of coiled pipe like coiled pipe is under 20mm and the outer diameter is 450-3000mm. It is made of steel plate by direct rolling, welding, forming, butt joint and rebar removal. Coil pipe has the characteristics of short processing time, rapid delivery and low cost. The rolling pipe is mainly used for pipes,16Mn welded steel pipe, billboards, columns, etc.

The convex hull on the surface of the crimp roll shall be treated. Before repeated processing, the equipment surface shall be treated to prevent the convex hull steel plate with abnormal roll surface from causing pits.