45# welded ste
16Mn welded stPipe rolling is to form the steel pipe blank with a steel plate rolling machine, then weld it into steel pipe with submerged arc welding or electric welding, and then conduct sizing and forming on other forming equipment. This kind of pipe is single piece production with low efficiency, unstable pipe quality and low dimensional accuracy, but the equipment is simple and the investment is less. Longitudinal welded pipe equipment has high efficiency, good quality, high precision and good performance. It is the main equipment for large-scale production of steel pipes.
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 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, rolling pipe factory, large quantity, excellent quality and low price, fire resistance - Waterproof - high temperature resistance, safe and reliable
.Clean up the workplace and eliminate unsafe factors.
Rolled pipe is divided into straight seam rolled pipe and T-shaped welded pipe. The pipe rolling can meet the market demand for less number and more models of welded pipes. It can be used for pipe pile, column, conveying fluid, pressure vessel, etc. The longitudinal weld of the same barrel section of high pressure and high temperature continuous pipe shall not exceed two courses, and the spacing between the two longitudinal welds shall not be less than 200mm.
.Move the steel pipe twice to weld and reinforce the rolled pipe joint, and then transport it to the welding platform for welding.
The function of parameters of pipe rolling equipment is improved by 30%, which fills the gap that can not be produced by traditional steel rolling equipment. It can produce steel pipes with diameter of more than 400 and wall thickness of 4-100mm. The main materials are q23q3420, 435cimo and 42cimo, 16 manganese and 16 manganese capacity. Generally speaking, cold-rolled sheet can be used for pipe rolling. Product standards: GB / t50205-200, 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.
With the development of domestic economic situation and the acceleration of welding and casting trend, 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, 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. In industrial production, the thermal cutting of thick wall coiled pipe generally includes gas 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. With the rapid development of computer and digital technology, 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.
Large diameter steel plate rolling pipe large diameter steel plate rolling pipe value large diameter steel plate rolling pipe is made of 16mm thick wall rolling pipe, adopts advanced technology, has good use characteristics and performance in use, and can show important value and function. It can wind the steel strip with appropriate quantitative and wide width into a parallel winding pipe with the required inner diameter and wall thickness; The roller is driven by active stepless speed regulation,Q355b large diameter welded pipe, with small mandrel deformation, large pressure, high power transmission efficiency, good winding strength and flat appearance; With self-locking function, Q345 large-diameter steel plate coil for bridge can be automatically locked without shaking after adjusting the swing arm angle; With automatic cutting device, the incision is neat without warping angle, and the cutting length is adjustable. To operate by two people. 16mm thick wall coiled pipe is durable in use, stable in performance and easy to operate.
Because the coiled steel pipe plays an important role in construction, railway construction and bridge construction,Q460b large diameter thick wall coiled pipe, its quality standards are also more important. If you don't understand the quality specifications and standards, it is easy to have an impact. Generally, we can purchase from these aspects.
Information recommendation.Effective.
, low cost. The rolling pipe is mainly used for pipes, billboards, columns, etc.
When the nominal diameter is greater than or equal to 600mm, back welding shall be carried out in the pipe.
1 carbon structural steel: q215-a, q215-a. & middot; F,Q215-B,Q215-B· F,Q235-A,Q345B reel,Q235-A· F,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, Q235B coil, Q345B coil, large diameter thin wall coil, large diameter thick wall coil, stainless steel coil, L360 coil, 16Mn coil, 20 old brands, with price advantages and quality! Thick wall coil can be divided into two types: hot coil and thick wall coil.
Quality inspection report.In progress welcome to consult. Large diameter welded pipe, etc.
Among the small Banqiao Xinyuan material trading market of coil pipe manufacturers this is a relatively mature steel processing trading market. Therefore, there are more manufacturers and more choices, and natural processing will be cheaper.
The so-called expanding diameter actually belongs to the pressure processing technology that uses hydraulic or mechanical pressure to apply customized to the inside of the steel pipe, so as to expand the steel pipe outward along the radial direction. Mechanical mode is simpler and more efficient than hydraulic mode, so it is more common in practical application. In particular, it is adopted in the very advanced expanding process of several large-diameter straight seam rolling pipelines.
.The wall thickness of hot coil thick wall continuous pipe is generally greater than 20mm, and the outer diameter range is 450-3000mm. Hot rolled thick wall continuous pipe is rolled, welded, formed, reinforced, flaw detected and delivered under the condition of steel plate heating. Sometimes the wall thickness is very special and needs secondary heating. It is characterized by small outer diameter tolerance and uniform wall thickness. The main reason is that the hot rolled thick wall continuous pipe will not damage the performance of raw materials. The disadvantages of hot rolled thick wall continuous pipe are long processing time and high cost. Hot rolled thick wall pipe is widely used: oil cylinder, hydraulic, bridge, roll, etc. Compared with seamless steel pipe, thick wall continuous pipe has the disadvantages of low cost, fast delivery, breaking the fixed specification of seamless steel pipe and so on. Thick wall coil is welded by bending steel plate or steel strip. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. It can be divided into ordinary welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, deep well pump pipe idler pipe, automobile pipe, transformer pipe, welded thin-wall pipe welded special-shaped pipe and spiral welded pipe. It is a special product manufacturing enterprise integrating research, development and service. It has long been specialized in hot-rolled steel pipe, large-diameter thick wall rolling pipe, thick wall straight seam rolling pipe, steel casing and rolling pipe factory. Continuous pipe is committed to producing all kinds of circumferential seam and longitudinal circumferential continuous pipe and penstock, and is reformed on the basis of the same specification and model of traditional rolling equipment. The function of parameters of coil welded steel pipe equipment is improved by 30%, which fills the gap that can not be produced by traditional rolling equipment. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm. The main materials are q23 q34 20, 16Mn 16Mn, etc. the product standards are GB / t50205-200, GB / t3092-2001, etc. the products are widely used in petroleum, chemical industry, natural gas transmission, pile driving, urban water supply, heating, gas supply and other projects.
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 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