In order to make you better understand the installation method of coiled pipe the following coiled pipe factory will introduce the installation method of coiled pipe: pipe hoop is used, and raw silk belt,16Mn large diameter reel, white hemp wire, pipe expander, handle and other tools are used to connect coiled pipe and pipe fittings. This method may need repeated debugging due to the great influence of human factors. In addition when the materials of coiled pipes and pipe fittings are different, due to their different thermal coefficients, leakage may occur when cold and hot water are used alternately.?
In general, the process of expanding the diameter of coiled pipe products can be divided into three stages. It is the preliminary rounding stage: the sector blocks are opened until all the sector blocks reach the steel pipe. At this time, the radius of each point in the steel pipe is almost the same within the step range, repetition accuracy ≤ 5mm. How about thick wall coiled pipe?
In general, the process of expanding the diameter of coiled pipe products can be divided into three stages. It is the preliminary rounding stage: the sector blocks are opened until all the sector blocks reach the steel pipe. At this time, the radius of each point in the steel pipe is almost the same within the step range, and the steel pipe is preliminarily rounded. The second stage is the nominal inner diameter stage: the sector starts to reduce the movement speed from the front position until it reaches the required position, which is the inner circumference position of the finished pipe with quality requirements.
.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 stainless steel seamless steel pipe for pipe jacking structure (GB / t14975-199) are widely used in corrosion-resistant pipes and structural members in chemical, petroleum light textile, machinery and other industries food, and stainless steel hot rolled (, hot rolled steel pipe is a special thick wall steel pipe rolled with steel plate under heating conditions. Here hot coiling refers to heating to coil the steel plate. Its meaning shall be determined with cold rolled steel pipe.
The weld reinforcement is increased, the weld formation is deteriorated and the edge transition is poor.
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.
Mixed alloy (eutectic mixture): when the liquid alloy solidifies, Qinhuangdao thick wall steel plate coil,Q345B large diameter reel, the alloy formed by the crystallization of each component of the alloy, such as solder, bismuth cadmium solid melt alloy, and the alloy forming solid solution when the liquid alloy solidifies, such as gold and silver alloy; Many properties of alloys are better than pure metals, and the welding voltage directly affects the length of the arc. Therefore, the general production process of thick wall continuous pipe can be divided into cold drawing and hot rolling. The production process of cold rolled seamless steel pipe is generally more complex than that of hot rolled steel pipe. First, the pipe must be subject to winding diameter test. If there is no response crack on the surface, the round pipe will be cut and the growth of the blank is about M. However, during annealing, acid should be used for annealing, and attention should be paid to whether there are a large number of bubbles on the surface. If a large number of bubbles appear, the quality of the steel pipe will not meet the response standard. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe, and the wall thickness is generally smaller than that of hot-rolled seamless steel pipe,16Mn coil, but the surface is brighter than that of thick wall seamless steel pipe, the surface is not too rough, the diameter is not too prickly, and the strength is high. The manufacturer offers, operates in good faith, and has a real price. The same specification, thick wall continuous pipe, spot supply, and complete specifications, the arc length increases, the moving range of solder joint increases and the molten pool widens. If welding is carried out in a horizontal position, the weld width will be changed, but the edge transition of the weld will not be affected. However, the external welding of spiral welded pipe is carried out on the slope, and the molten weld metal will flow laterally under the action of gravity. We specialize in providing hot-rolled steel pipe, large-diameter thick wall continuous pipe, thick wall straight seam continuous pipe, steel casing and quality assurance of pipe rolling plant. During the preferential activities, new and old customers are welcome to consult. Therefore, the greater the welding voltage, the wider the weld pool, the more serious the transverse flow of weld metal, and finally lead to the bias of weld metal.
new product.Weld size has a great influence on the quality of rolled steel pipe. Weld size mainly includes welding process parameters, welding wire shape and position parameters, flux flow, flux process performance and weld forming.
Diameter of rolled steel pipe: sometimes the diameter of the demand plan is different from that of the supplier.
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.
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, 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, 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, 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.
Good quality.Thick wall coiled pipe is a kind of familiar steel. It is widely used in construction and pipeline industry because of its durable performance and excellent quality. Have we known about the packaging process of the frequently used steel? With the development of domestic economic situation and the acceleration of welding and casting trend, the advantages of NC cutting are gradually recognized. NC cutting not only greatly improves the rate of plate and product quality, but also improves the working environment and labor efficiency. At present, 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, which is mainly reflected in: 90% of the developed thick wall coiled pipe processing industry is digital control cutting machine, and only 10% is manual cutting; The CNC cutting machine only accounts for part of the total blanking. 10%, of which the proportion of NC plasma cutting is small. Professional hot rolled steel pipe, large diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing, rolling pipe factory to ensure quality, service and quality. Your satisfaction is our pursuit! Welcome to inquire. In industrial production, thick wall coil thermal cutting generally includes gas cutting, laser cutting, etc. 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. With the rapid development of computer and digital technology, NC cutting is also developing, which improves the machining accuracy. Save materials
The common standards for thick wall coiled pipes are generally divided into: (ministerial standard, also known as spiral submerged arc welded steel pipe for ordinary fluid transmission pipeline) (national standard, also known as oil and gas industry transmission steel pipe (up to now, the requirements are strict (American Petroleum Association, (spiral welded steel pipe for pile) The Ministry of petroleum has set up standard Pandu pipe, oil and gas industrial transmission steel pipe, spiral seam high-frequency welded steel pipe for general low-pressure fluid transmission. The hot-rolled steel strip coil is used as the pipe blank, and the spiral seam high-frequency welded steel pipe for high-frequency lap low-pressure fluid transmission is used. The spiral welded steel pipe for pile is hot-rolled steel strip coil as the pipe blank, which is often warm spiral formed, and double-sided submerged arc welding is used Connecting or high-frequency welding of steel pipes for building structures, docks, bridges and other foundation piles. Q235B steel pipes bring great convenience to our life. For example, rolling pipe, Q235B rolling pipe, Q345B rolling pipe, large-diameter thin-wall rolling pipe and large-diameter thin-wall rolling pipe Large diameter thick wall coil, stainless steel coil, L360 coil and 16Mn coil have high pressure resistance, good waterproof performance fire and high temperature resistance, strong overload capacity, corrosion resistance, radiation protection and long service life, which has brought great support.
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.
.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, columns, etc.
Deviation reel as follows (unit: mm): nominal diameter & amp; amp; lt; 800 800 to 1200 1300 to 1600 1700 to 2400 2600 to 3000 perimeter Deviation & plusmn; 5± 7± 9± 11± 13 ovality is 1% of the outer diameter, 4 6 8 10 and no more than 4 steel plate coils have standards. At present, we carry out construction according to the acceptance of standard GB / t19793-92.
The pipeline installation sequence is based on the principle of sub area and sub system, with small diameter, from the lower layer to the upper layer, from difficult to easy, from the pipe gallery to the equipment. In principle, the pipeline connected with the machine is configured from the inside to the outside to reduce the impact of welding stress on the installation accuracy of the machine. The interface between indoor and outdoor pipelines shall be left outdoors. Q345B thick wall coiled pipe is a kind of material in carbon steel and is widely used. The thickness of Q345B thick wall coiled pipe is generally more than 10mm, sewage pipeline, dredging pipeline, construction pipeline, etc. Q345B thick wall coiled pipe is a welded pipe product, and the process in the welded pipe is relatively simple and flexible. This type of steel pipe usually has no inventory and is processed by user. If the quantity is small, the raw materials are not good. The main problem of Q345B thick wall coiled pipe is welding. As long as it is possible, the delivery related requirements can be compared with other products.