16Mn large dia
16Mn large dia
Q345B thick waLet me introduce the standard coil produced by steel plate. In the process of rolling, the surface of the circuit board should be protected from damage. Parts with severe scars shall be ground to achieve transition, and the wall thickness of the ground part shall not be less than the design wall thickness.
The main purpose of preheating is to reduce the cooling rate of welded joints and preheat temperature. As can be seen from the table, preheating can reduce the cooling rate, but basically does not affect the time spent at high temperature, which is ideal. Therefore, when welding thick wall coils with hardening trend, the main technical measure to reduce the cooling rate and hardening trend is preheating rather than increasing the line energy. Plasma cutting of thick wall coiled pipe is more effective than gas cutting
.In the cleaning and preheating process of thick wall coiled pipe firstly, before spraying (throwing) treatment, clean the surface of thick wall coiled pipe to remove grease and scale, and preheat the pipe body with heating furnace to keep the surface of thick wall coiled pipe dry. During the spraying (throwing) treatment, because the surface of the thick wall coil does not contain grease and other dirt, the derusting effect can be enhanced. The dry surface of the thick wall coil is also conducive to the separation of steel shot, so as to make the surface of the thick wall coil more clean after derusting.
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, the three steps can be combined and simplified, 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.
.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, gas supply and other projects.
In the process we mentioned, we need to explain each process, such as groove. We need to compact both sides of the steel plate with indenter, so as to avoid the formation of peach shaped mouth in the rolling pipe.
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,Q550b thick wall welded pipe, 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.
Columns for bearing steel structures such as offshore platforms, super long-span building structures and electric pole tower and mast structures requiring wind resistance and earthquake resistance. Inspection equipment maintenance and packaging strategy: 16Mn thick wall coil adopts PLC automatic system, and all parts of Shenzhen thick wall coil focus on panel operation. The cutting length of 16Mn thick wall coil adopts photoelectric induction, accurate positioning and automatic cutting. Each working process adopts double pump oil pressure system, which runs smoothly, Shenzhen thick wall coiled pipe has good cutting synchronization performance. 16Mn thick wall coiled pipe has different application ranges: length: 0-1400mm, thickness: 2-15mm, application: 3 inches x2 4x application voltage: 380V 50Hz. It is used according to the specified parameters and range to ensure that it can play an important role and value in use. The packaging process of new product 16Mn thick wall coil includes main processes such as filling, wrapping and sealing, as well as related pre and post processes, such as cleaning, stacking and disassembly. The process of 16Mn thick wall rolling pipe shall be strict, and it shall be produced in the correct way and principle. In addition, the process of 16Mn thick wall coiled pipe also includes measuring or stamping on the package. The use of mechanical packaging products can improve productivity, reduce labor intensity, meet the needs of large-scale production, d7z3xjb87v21w and meet the requirements of cleanliness and hygiene. The production process of rolling pipe is round pipe blank → Heating → Perforation & rarr; Roll cross rolling continuous rolling or → Off pipe & rarr; Sizing (or reducing) → Cooling → Straightening & rarr; Hydrostatic test (or flaw detection) → Mark & rarr; According to different production, warehousing supply indicators can be divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe, pipe, etc. quality management? Hot rolled seamless tubes are produced on the automatic tube rolling mill. The solid tube blank is cut into the required length by removing the surface defects. The Shenzhen coiled tube is centered on the end face of the perforated end of the tube blank, and then sent to the heating furnace for heating. It is perforated on the piercing machine. At the same time, it rotates and advances continuously. Under the action of the roll and top head, a cavity called rough tube is gradually formed inside the tube blank,20# large diameter welded pipe, Then it is sent to the automatic pipe mill for continuous rolling, and the wall thickness is adjusted by the whole machine. The Shenzhen coiled pipe is sized by the sizing machine to meet the specification requirements. The production of hot-rolled seamless steel pipe by the continuous pipe mill is relatively advanced. If you want to obtain seamless pipe with smaller size and better quality, 888yixtfrfsbu Shenzhen coil pipe must be cold rolled and cold drawn or a combination of the two. The cold rolling is usually carried out on the roll mill. The steel pipe is rolled in the annular pass composed of variable section circular hole groove and fixed conical plug. The cold drawing is usually carried out on the single chain or double chain cold drawing machine, that is, the heated pipe blank is placed in a closed cylinder, and the perforated rod and rod move, Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, steel casing, rolling pipe factory has advanced technology, strict testing, more affordable price and more preferential. Welcome to consult. Make the parts extruded from the smaller die hole. This method can produce the steel pipe with smaller diameter. Work course standard requirements & amp; amp; quot;Standard requirements: the Executive Standards of hot-rolled thick wall coil product line are: GB / t50205-200, GB / t3092-2001, etc.
Because of its good mechanical properties, it has been widely used in steel pipe production. According to the different process requirements of steel rolling manufacturers, the steel pipe length measurement system has a variety of length measurement methods. The main points are as follows: the basic principle of grating ruler length measurement is: two fixed length grating rulers are set outside both ends of high-frequency welded continuous pipe, and the rodless oil cylinder drives the grating ruler close to both ends of the steel pipe to realize the interference measurement of the length of the steel pipe.
1800mm steel pipe elbow detailed introduction to elbow: first of all, the material is hot pushed, 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, that is, 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.
Inspection environment.The influence of welding process parameters on welding current mainly includes two aspects: according to the production characteristics of spiral steel pipe, small welding current is usually used for internal welding
The thickness of hot-rolled thick wall coil is generally greater than 20mm, and the outer diameter range is 450-3000mm. The hot-rolled thick wall coil is rolled, welded, formed, ribbed and defect detection 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 coil will not damage the properties of raw materials. The disadvantage of hot roll thick wall rolling pipe is that the treatment time is long. Hot rolled thick wall coiled pipe is widely used: cylinder, hydraulic, bridge, roller etc.
Thick wall coiled pipe is made of steel plate. Thick wall coiled pipe can be divided into coiled pipe and thick wall coiled pipe. The wall thickness of coiled pipe is 20mm and the outer diameter is 450-3000mm. It is rolled, welded, formed, butted removed and reinforced directly from the steel plate. Coil pipe processing time is short and delivery is fast Low cost. The rolling pipe is mainly used for pipes, billboards, 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,20# large diameter reel, 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, gas supply and other projects.
recommend.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, butted and reinforced. Cold rolled thick wall pipe has the characteristics of short processing time, billboard, column, etc.
In continuous pipe production, expanding and piercing method is widely used. Large diameter pipe rolling is drilled in the center of the blank φ 20 ~ 40mm guide hole, and then push the stamping rod from the guide hole to expand the guide hole to make the hollow blank extend reversely in the die. The capillary perforation precision is high, and the capillary wall thickness is large, so the perforation precision is high.
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.
.The inner diameter of 1800mm steel plate coiled pipe elbow is 1800mm, the bending radius is also 1800mm, the material thickness is 4mm, and the bending is 90 & deg;.
Thick wall coiled pipe is usually higher than dn450. Thick wall coiled pipe is sometimes two welds. Why does this happen mainly because of raw material problems and equipment processing problems? 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 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. The longitudinal weld on the same cylindrical part of the coiled pipe shall not be greater than 2. When the coil pipe is butt welded, the corresponding parts shall be flushed to. When the nominal diameter is larger than the inner seal, the bottom seal welding shall be carried out. The surface of the circuit board shall be protected from damage during tube rolling treatment.
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, there is still a certain gap with the international advanced level in terms of technical equipment, 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, 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, spiral pipe can play an important role and value in different industries and fields.