The steel plate rolling pipe we call the steel plate rolling pipe is actually a process. The following small series will describe the process sequence: plate inspection blanking, beveling, steel plate rolling, assembly spot welding, campus, perimeter and roundness deviation inspection, welding, weld inspection, pipe test and delivery. Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory and other special products, old brands, price advantages and guaranteed quality. These processes can not be less.
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 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.
.2PE / E shall comply with SY / t0413-2002 (test) technical standard for polyethylene outer coating of buried steel pipeline
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, 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, 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
.If the particle size of straight seam coiled pipe is too small, the adhesion and impact strength of the coating will be reduced. For serious internal pitting corrosion it can not only rely on the high-strength impact of large particles of rinse agent, but also remove corrosion products with small particles. Reasonable ratio design can not only slow down the speed of pipeline and nozzle (propeller) rinse agent. Wear and tear, and the rate of rinsing agent can be greatly improved. Generally, the particle size of metal particles is 2 - 9mm, and the particle size of metal sand is 1 - 2mm, of which 3 - 5mm is a common component. The sand shot ratio is usually 4 to 9.
Weld inspection is necessary to detect the weld quality of steel coil pipe. After welding, all the welds are tested by on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of the welds. If there are defects, it will automatically alarm and spray marks, and the production will adjust the process parameters at any time to eliminate the defects in time.
Continuous pipe products are widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heat supply, gas supply and other projects. The detection of thick wall continuous pipe is mainly ultrasonic flaw detection. The longitudinal weld of the same barrel section of thick wall continuous pipe shall not exceed two passes. The butt weld of thick wall continuous pipe shall be flush with the. When the nominal diameter is larger than, 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. Professional hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, large quantity, excellent quality and low price, fire resistance - Waterproof - high temperature resistance, strong and durable, safe and reliable
Separate & ldquo; Hot coil & rdquo; The word is a noun, which is the abbreviation of hot rolled coil, indicating a kind of behavior.
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, 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.
: 90% of the developed thick wall coil processing industry is CNC cutting machine, 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. Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory, high pressure rating, fire and high temperature resistance, strong overload capacity, corrosion resistance, radiation protection and long service life. With the rapid development of computer and digital technology, NC cutting has also expanded and improved the processing 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. The large-scale rolling pipe factory of rolling pipe t-welded rolling pipe, flaw detection welding rolling pipe, 16Mn rolling pipe, Q345B rolling pipe and special-shaped rolling pipe, and the t-welded rolling pipe, 16Mn rolling pipe, Q345B rolling pipe and special-shaped rolling pipe produced by the rolling pipe factory are exported to major engineering buildings at home and abroad.
Quality department.It should be noted that in practice, it is difficult to achieve the ideal proportion of metal sand and metal ball in the rinsing agent, the mixture should be sampled continuously and the mixed rinse should be tested. According to the particle size distribution, the new rinse agent is added to the cleaning machine, and the amount of metal sand is usually the same in the new rinse agent.
With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting are gradually recognized. It has long provided various brand products such as hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing and rolling pipe factory. The designated products are complete and the quality is guaranteed. 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, of which the proportion of NC plasma cutting is small. In industrial production and only 10% is manual cutting; The CNC cutting machine only accounts for part of the total blanking. 10%, 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, 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.
The rolled pipe shall meet the specified arc degree, end face deviation, straightness, etc.
Be able to show important value in different industries and fields. When the coiled pipe is greater than 600mm, two longitudinal welds are allowed, and the spacing shall be greater than 200mm.
Direct material.API seamless steel pipe is expressed as outer diameter, wall thickness and thick wall seamless steel pipe, which is mainly used for machining, coal mine, hydraulic steel and other purposes. Classification of thick wall seamless steel pipe & mdash& mdash; Hot rolled thick wall seamless steel pipe, cold rolled thick wall seamless steel pipe, cold drawn thick wall seamless steel pipe, thick wall seamless steel pipe, petroleum, light textile, food, machinery and other industries, and stainless steel hot rolled (,) and cold drawn (rolled) Seamless stainless steel pipe for fluid transportation (GB / t14976-199) is a hot-rolled (extruded) and cold drawn (rolled) seamless steel pipe made of stainless steel for fluid transportation.
Outer diameter scale of coiled pipe - mm. Coil pipe is widely used: oil cylinder, hydraulic, bridge, roller, etc. The rolling pipe is rolled, welded, formed, de reinforced, flaw detected and delivered under the condition of steel plate heating. Sometimes, the wall with relatively thick thickness needs secondary heating. It is characterized by small outer diameter and uniform wall thickness. First and foremost, the coiled tube will not damage the function of raw materials. The disadvantages of rolling pipe are long processing time and high cost.
Separate & ldquo; Hot coil & rdquo; The word is a noun, which is the abbreviation of hot rolled coil, indicating a kind of behavior.
.The distance between the two longitudinal slits of the reel assembly shall be greater than 100mm. The distance between the outer wall of the branch pipe and the weld shall not be less than 50mm.
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, 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, 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, diameter: 20-200mm, 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 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, and the perforated rod and rod move, Professional hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam 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.