Q460b straight
Q460b reelHow In the production process, the hot-rolled steel pipe has the characteristics of no raw materials, that is, the steel plate is heated first and then rolled, which softens the steel plate under great conditions, which will not affect the material quality, nor damage the properties such as strength yield and tensile strength. For the wall thickness that can not be achieved by cold rolled steel pipe, the specification and model of thick wall steel pipe are added.
1 carbon structural steel: q215-a, q215-a. & middot; F,Q215-B,Q215-B· F,Q235-A,Q235-A· F,Q235-B,Q235-B· F. Q235-c ordinary carbon steel: B2 BY2 B2F by2f B3 by3 B3F by3f a2ay2 a2f ay2f A3 ay3 A3F ay3f2 high quality carbon steel: 10 15 20 transmission shaft steel 3 low alloy structural steel: 123mn 16Mn 19mn 08ti 10ti15ti4 special purpose steel thick wall coil is made of steel plate. Long term coil, Q345B coil, large diameter thin wall coil, large diameter thick wall coil, stainless steel coil, L360 coil, 16Mn coil, with price advantages and quality! Thick wall coil can be divided into two types: hot coil and thick wall coil.
.With the dissolution of the steel coil surface, the contents of iron, nickel and chromium in the solution will gradually increase. At this time, the solution will gradually lose its polishing ability. In any case, increase the temperature, turn on the current and equalize the force. For the analytical solution, if the iron content exceeds 60g / L and the valence chromium content exceeds, it indicates that the solution has been aged. There are two options for the regeneration of polishing solution and the restoration of polishing ability. When the solution is diluted with water to reduce the acidity, impurities such as iron, chromium and nickel can be locally precipitated as salt, and the precipitation at the bottom of the tank can be removed, and then heated and evaporated to remove water, so it is cumbersome to restore the original relative density, which requires a large consumption of energy and time. The other is to replace part of the solution, so as to retain 20% of the old solution and supplement 80% of the new solution. It can be polished with little or no power.
Thick wall coiled pipe sometimes has two welds. Why does this happen? It is mainly due to raw material problems and equipment processing problems. The width of the welded pipe required by the customer is not produced by the steel plant, 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, 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, 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, coil Q235B coil, Q345B coil, large-diameter thin-wall coil, large-diameter thick wall coil, L360 coil and 16Mn coil. The inspection is strict and the quality is preferential
.Recently, with the rapid development of excellent strip continuous rolling production and the progress of welding and inspection technology, the weld quality has been continuously improved, and the technology of welded pipe has also been continuously improved, and the application field is relatively wide so as to gradually replace the seamless steel pipe. The main one is the technological development of welded pipe. Our welded pipe is made of steel plate or strip steel and welded after crimping. It is generally a welding process, which improves the production efficiency and service quality of welded pipe.
Due to the continuous application of thick wall coiled pipe in industry and the continuous expansion of its scope it has many advantages. In order to prevent the thick wall coiled pipe from rusting, we can apply antirust oil on the surface of the thick wall coiled pipe.
The butt joint of coiled pipe (with the same wall thickness) shall not exceed 10% of the wall thickness and not more than 2mm.
Compared with seamless steel pipe, thick wall rolling pipe has the disadvantages of low cost, rapid delivery, breaking the fixed specification of seamless steel pipe,Q235B reel, 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,16Mn large diameter welded 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, heating, gas supply and other projects.
The standard FBE epoxy powder shall comply with SY / t0315-1
The process of heating the whole thick wall coil or welding area before welding is called preheating. For the steel with high welding strength grade, it has hardening trend, material especially good thermal conductivity, weldment and large thickness. When the ambient temperature around the welding area is too low, it is necessary to preheat the weldment before welding.
average method.In the production process, the hot-rolled steel pipe has the characteristics of no raw materials, that is, the mechanical properties of thick wall steel plate. In this way, the steel plate is heated first and then rolled, which softens the steel plate under great conditions, which will not affect the material quality, nor damage the properties such as strength, yield and tensile strength. For the wall thickness that can not be achieved by cold rolled steel pipe, the specification and model of thick wall steel pipe are added.
The quality of steel rolling pipe is greatly affected by the size of weld, mainly including welding process parameters, forming joint and other comprehensive factors.
Effective.
Generally, the wall thickness of the rolled pipe is 20mm and the outer diameter is 450-3000mm. It is rolled, welded, formed, butted and rolled directly from the steel plate. It has the advantages of short processing time, fast delivery and low cost. The rolled pipe is mainly used for hot-rolled thick wall coils such as pipes, billboard and columns. The thickness of the hot-rolled thick wall coil is generally greater than 20mm and the outer diameter is 450-3000mm. The hot-rolled thick wall coil is rolled under the heating of the steel plate Welding, forming, deburring, defect detection and delivery. Sometimes the wall thickness is relatively thick and secondary heating is required. The feature is that the outer diameter tolerance is small Uniform wall thickness. It is important that the hot rolled thick wall coil will not damage the properties of raw materials. The disadvantages of hot roll thick wall rolling pipe are long processing time and. Hot rolled thick wall coils are widely used: cylinder, hydraulic, bridge, roller table, etc.
Product line.The rolled pipe shall meet the specified arc degree, end face deviation, straightness, etc.
The steel plate coil is cut into single pieces by air plasma cutting machine.
High manganese content 6 will make the steel brittle and reduce its plasticity. Under what circumstances does the thick wall coil need to be preheated before welding?
.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, 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 acid shall be used for annealing, 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, 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.
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.
The butt joint of coiled pipe (with the same wall thickness) shall not exceed 10% of the wall thickness and not more than 2mm.