45# large diameter thick wall coiled pipeVariety differentiation

announcer:hp709HP180518493 release time:2022-01-17 15:38:27

16Mn longitudinal welded pipe,

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 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.

.The welding method of welded steel pipe is submerged arc welding; Molding process, forward swing intermittent production; Unit speed, 0.5 -- 3m / min; Welding speed, 0.5 -- 3m / min. The unit is composed of uncoiler, straightener, centering device, hydraulic shear, milling welding machine, disc shear, edge milling machine, plate surface cleaning equipment, delivery machine, plate edge pre bending equipment, forming machine, internal welding, external welding, flash, pulling out, slag pouring, repair welding, flat head chamfering, hydraulic inspection, finished product inspection and degreasing collection. The whole process of submerged arc welding of spiral steel pipe is as follows: the principle of spiral steel pipe submerged arc welding: submerged arc welding is welded with arc heat energy. The difference from manual electrode arc welding is that the welding wire of submerged arc welding is, and there is no coating on it. The flux of submerged arc welding is pre laid at the place to be welded. In the flux of submerged arc welding wire, the arc is under the flux. For welding wire and workpiece, when the start button is pressed, the welding wire and workpiece are energized, the welding wire is pulled back, the arc is ignited, the welding trolley moves forward, and the welding wire is continuously transported downward to maintain the arc under the flux layer and form a welding pool under the arc. Around the arc, the flux melts to form a cavity. The cavity and molten pool advance continuously, and the metal behind the molten pool solidifies to form a continuous weld. This process is carried out under flux, so we can't see it. It can be seen by means of X-ray photography. Because the spiral steel pipe adopts the welding technology of submerged arc automatic welding, in addition to this, the production efficiency is high; The auxiliary time of production is less, saving the cleaning time; High weld quality. It also provides necessary conditions for the delivery of spiral steel pipe factory, so that the production time of large amount of spiral steel pipe can be guaranteed, so it is still widely used.

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

.Main technical measures for low hardening trend

If the top wall thickness of the pipe is equal to the bottom wall thickness, the formula can also be simplified as: (top inner diameter + bottom inner diameter) * 1 / 2 * 0.02466 * pipe length = weight inspection of conical special-shaped coil. 16Mn thick wall coil adopts advanced technology. Jbq6xvzt52aj5 Shenzhen thick wall coil has good use characteristics and performance in use and can show important value and role. The specific functions and values of 16Mn thick wall coil are as follows: it can coil suitable quantitative and wide steel strip and Shenzhen thick wall coil into parallel coils with required inner diameter and wall thickness; The roller is driven by active stepless speed regulation, with small mandrel deformation, high pressure of Shenzhen thick wall winding pipe, strong winding force of Shenzhen thick wall winding pipe high power transmission efficiency, good winding strength and flat appearance; With self-locking function, the swing arm can be automatically locked without shaking after angle adjustment; With automatic cutting device the incision is neat without warping angle, and the cutting length of Shenzhen thick wall coiled pipe is optional and adjustable. To operate by two people. 16Mn thick wall coiled pipe is durable and stable in use. Shenzhen thick wall coiled pipe is easy to operate. According to the safety and health standards, the rolling pipe is committed to producing all kinds of rolling pipes and steel penstocks with circumferential seams and longitudinal rings, 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 a diameter of more than 400 and a wall thickness of 8-100mm in Shenzhen. 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,16Mn large diameter thick wall welded pipe, chemical industry, natural gas transportation, pile driving and urban water supply, heating, gas supply and other projects. The process of designing brand inspection standard thick wall straight seam coiled pipe is generally rolled. If the diameter required by the customer is particularly large, it is difficult for Shenzhen thick wall coiled pipe like machinery and equipment. Shenzhen thick wall coiled pipe needs to be rolled. After the steel plate is rolled, Shenzhen thick wall coiled pipe will weld two rolled steel pipes, The weld formed by Shenzhen thick wall coiled pipe is also called t-weld. Sometimes, two steel plates need to be rolled and welded for thick wall straight seam steel. D7z3xjb87v21w, so two welds may appear in one 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, X ahzpdqsqu7 is basically OK. The main problem of the product is the welding quality. The welding quality directly determines the quality of the product. Shenzhen thick wall rolling pipe is the main step in thick wall rolling pipe. Suitable for buildings, bridges, dams

1800mm steel pipe elbow detailed introduction to elbow: first of all, the material is hot pushed, the pusher is a horn shaped core or mandrel, the mandrel is thickened and thickened, the process of pushing the elbow is the process of expanding the diameter and it is supported on the back. The material tube part passes through the mandrel, and there is an arched frame at the rear to fix the mandrel. There's a car in the middle. Some cars are driven hydraulically, others are driven by mechanical transmission, screw drive, and then the car pushes forward, and the car pushes the pipeline along the core. The rod moves forward, there is an induction coil outside the mandrel, the tube is heated and heated, and then the trolley pushes the tube down and processes one.


45# large diameter thick wall coiled pipeVariety differentiation



1 carbon structural steel: q215-a, q215-a. & middot; F,Q215-B,Q215-B· F,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 plates are stacked in the open air to prevent rain from causing steel plates. The oxide scale falling off the surface of steel plates is easy to turn into blocks or clusters and adhere to steel plates or crimping rollers, When repeatedly pressed, the coiled pipe forms pit defects.

The thickness of hot-rolled thick wall continuous pipe is generally greater than 20mm, and the outer diameter range is 450-3000mm. Hot rolled thick wall steel coil is rolled, welded, formed, reinforced and defect tested under the condition of steel plate heating. Sometimes the wall thickness is relatively thick and secondary heating is required. It is characterized by small outer diameter tolerance and uniform wall thickness. It is important that the hot-rolled thick wall steel coil will not damage the properties of raw materials. The disadvantage of hot-rolled thick wall pipe rolling is long processing time All kinds of hot-rolled steel pipes, large-diameter thick wall coiled pipes, thick wall straight seam coiled pipes, steel casing, formal qualification of coiled pipe factory welcome to telephone inquiry and sincerely invite cooperation! Hot rolled thick wall pipe is widely used: cylinder, hydraulic, bridge, roll, etc.

Compared with seamless steel pipe, thick wall rolling pipe has the disadvantages of low cost, rapid delivery, 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, oxygen blowing welded pipe, wire sleeve, metric welded pipe,16Mn welded steel pipe, idler 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, 16 manganese capacity 16 manganese, etc. The products are widely used in petroleum, chemical industry, natural gas transportation, pile driving and urban water supply, heating, gas supply and other projects.

Where is good.The rolled pipe shall meet the specified arc degree, end face deviation, straightness, etc.

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, 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, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, 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, gas supply and other projects.

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


45# large diameter thick wall coiled pipeVariety differentiation



Main technical measures for low hardening trend

target.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.

Qualitative properties for example, the strength of steel is greater than that of its main constituent element iron. Professional hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, safety, environmental protection and economy! The products are exported to foreign countries and are deeply trusted. The physical properties of the alloy, such as density, reactivity and Young's modulus, may be similar to the constituent elements of the alloy. High quality thick wall steel plate coil, but the tensile strength and shear strength of the alloy are usually very different from the properties of the constituent elements and the atomic arrangement in the simple substance.

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 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 the three steps can be combined and simplified, so it is combined with general formula when carrying out theoretical weight.

.Effective.

For external welding, a larger welding current is used. However, under the condition of high welding current, the stirring effect of molten pool is enhanced, and the melting amount of welding wire increases accordingly, resulting in the increase of weld reinforcement, the deterioration of weld formation and poor edge transition.

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, the large diameter thick wall straight seam steel needs to roll and weld the two steel plates, 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.