China Straight Seam High Frequency 219mm ERW Welded Pipe Mill

Welded Pipe Mill
The plate in certain width after slitting line and stripping is unfolded and leveled. Then, they are sent into forming machine. Used the roller, the plate is bent into pipe state. The edge of the steel plate is melted by making use of the proximity effect and skin effect of high frequency current. Then, the plate is extruded and welded into the pipe by extruding roller. Straight seam welded pipe mill also is called ERW mill.
The forming styles of straight seam welded pipe can be divided into roll forming, flexible forming, full auto flexible forming. The mill developed by our company adopts roll forming when having small diameter (Φ≤114). Flexible forming or full automatic flexible forming is adopted when having middle or large diameter(Φ≤711).
In recent year, our company developed the precise control forming. The advantage of this kind forming is to guarantee the excellent forming quality in rough forming section through the precise control. Then it is no need to have the repair management in precise forming section. Therefore, the precise forming in this forming method does not need to change the roller. All the forming section does not need to change the roller, which solves the problem of the change in precise forming section and non-change in rough forming section. Therefore, it saves the roller investment and decreases the time of roller changing. Besides, during the diameter changing, all are controlled by industrial computer. The roller will automatically reach the position by inputting the pipe diameter, pipe wall thickness, material and other parameters. It largely improves the mill efficiency and pipe qualified rate. This forming method is suitable for medium and large mill from 219mm to 711mm, which saves the investment and improves the efficiency.
According to the pipe application, the ERW line can be divided to API standard pipe mill and national standard mill.
API standard straight seam HF welded pipe mill introduction is mainly used for producing the high grade pipe such as oil, gas delivering and casing pipe in the oil well. These high grade pipes strictly require the pipe material and pipe quality. This kind of straight seam HF welded pipe mill has IF annealing, air cooling roller rail, UT detector, high pressure hydrotester, diameter drifter and other detect equipments and art craft.
National standard mill is mainly used for manufacturing the low pressure fluid pipe and structure pipe.
Technical Feature
Our company is a company specializing in the design and production of API standard ERW units. The ERW line produced by our company are characterized by advanced technology, fast change of specifications, convenient operation, and durability.
The following are the unique technical advantages of our company:
1). Forming Machine without Roller Changing Technology
the unit adopts the world's most advanced molding machine, on the basis of the rough forming machine does not need to replace the roll, and developed the fine forming machine that does not need to replace the roll, so that the entire forming machine does not need to replace the roll.In this way, roll changing time is reduced and production efficiency is improved, which makes the production of multi-specification and small-batch orders possible.
2). Rapid replace roller sizing machine
Our machine set adopts the technology of rapid roll replacement with shafting lateral pull-out. and the spare shaft system of the installed roll is fed into the frame. In this way, roll changing time is reduced and production efficiency is improved, which makes the production of multi-specification and small-batch orders possible.
3). PC control to change specifications
Previous technology, when changing specifications of the roll adjustment, require highly skilled adjustment workers to do so. Due to the uncontrollable human factors, the unit's reject rate is relatively high and the adjustment time is relatively long, which seriously affects the unit yield and production efficiency. Our unit, the establishment of a comprehensive database, changing specifications, only need to input parameters such as diameter, wall thickness, the computer is called roll to adjust the location data of database, the computer will drive roll automatically stop after arrived in correct position, directly into the belt will be able to production, reduce the adjustment time and errors, reduce the rejection rate when the leader.Such adjustment technology, combined with the machine that does not need to replace the roll and the sizing machine that rapidly changes the roll, the unit can change the specification within 2 -3 hours, in the world leading position.
4). Advanced material preparation area technology
The unit adopts semi-automatic shear welding machine and automatic unattended accumulator, which realizes that only one worker is needed to operate the material preparation area of the unit and reduces the labor cost.
5). Outline uncoiling technology
The unit adopts the out-line unwinding and uncoiling technology, which is used for the normal operation of the production line, the unwinding station outside the line unwinds the next steel coil, leads the steel strip to the set position, and waits for the steel coil on the production line. once used up, the unrolled steel coil is immediately loaded into the uncoiler, the pinch roller is closed, the steel strip is fed into the initial leveler, and the shear butt welder is butt welded. This can save a lot of time for unwinding and unwinding, so that the steel strip in the looper is sufficient, and there is no need to stop the intermittently because the steel strip in the looper is gradually reduced, thereby reducing the generation of the waste pipe. And after applying the technology, it also takes sufficient time to deal with the weld height after the butt welding of the steel strip. If the weld height is not treated, the annealing equipment will have to be lifted when passing the intermediate frequency annealing equipment, and each the secondary lift will result in a defective tube of about 12 meters. The use of this technology can greatly improve the yield of the unit.
6). Advanced welds heat treatment technology
The unit adopts advanced NQT weld heat treatment technology. The weld is firstly heated at medium frequency, then quenched, and then the weld is heated again, and then the weld is annealed through a length of air-cooling section. Such a weld heat treatment process can ensure that the test indexes of the weld meet the API-5L standard.
7). Advanced hydraulic testing technology
The unit adopts advanced high-pressure hydraulic testing machine. The hydraulic press adopts large gap sealing. The boosting cylinder is supercharged to complete supercharging. The pressurized water filling tank is filled with water quickly. Perfect safety measures and comprehensive monitoring system ensure safe and fast running. Fully automatic working mode.
8). Advanced end facing technology
The unit adopts advanced end facing machine, and the end facing machine adopts patented fixture to ensure uniform and blunt edge after chamfering of the pipe end, in line with API-5L standard. Three knives are mounted on the cutter head, one flat head, one chamfered edge, one inner burr is removed, and the end face of the tube is clean and clean.
9). Advanced roll change tooling
The unit adopts advanced roll-changing tooling, which solves the previous traditional ground roll-making method in the ground of the workshop, and uses the crane to erect the roll shaft in the pit to reduce labor intensity, reduce the risk of work injury and beautiful workshop environment.
10). Advanced rolling mill drive power display technology
The unit adopts advanced rolling mill drive power monitoring display technology, equipped with rack drive power distribution dynamic analysis software, integrated roll position and rack power distribution status, dynamic display analysis of rack load conditions, providing guidance for precise adjustment, reducing mill's Equipment damage caused by excessive accidental force.
11). Low noise steel pipe conveying technology
The crew fully considered environmental factors and adopted many effective measures, including noise-reducing materials and short-distance transfer gantry to ensure that the noise level of the unit was very low and in line with national standards.
12). Advanced steel pipe logistics management technology
The unit uses a steel pipe numbering and identification system, so that all steel pipes in the entire production line are in an identifiable and manageable state. The steel pipe will establish communication with each equipment in the finishing area and summarize the steel pipe condition to the control center. When each shift is off work, a production status table is automatically generated, which records in detail how many steel pipes are produced in this shift, how many finished products, how many waste products, and which process the waste products are produced. In this way, the manager can clearly understand the condition of the unit and the production status, and can solve the problem according to the process of waste production.
Straight Seam Welded Pipe Mill Models
No.Model Size(mm)Speed(m/min)Thickness(mm)Capacity(KW)Area(m²)1HNGK-32Φ15-Φ32 10-120 1.5-2.5-40018*1002HNGK-50Φ21-Φ5010-120 2.0-4.0-45018*1003HNGK-60Φ25-Φ6010-110 2.0-4.5-50018*1004HNGK-76Φ32-Φ7610-110 2.0-5.0-55018*1205HNGK-89Φ36-Φ8910-100 2.0-6.0-60018*1206HNGK-114Φ50-Φ11410-90 2.0-9.0-70018*1207HNGK-127Φ50-Φ12710-90 2.0-9.0-70018*1208HNGK-140Φ60-Φ14010-90 2.0-10-75018*1209HNGK-165Φ76-Φ16510-80 2.0-10-80018*15010HNGK-219Φ89-Φ21910-60 3.0-14-100024*20011HNGK-273Φ89-Φ27310-60 3.0-14-120024*20012HNGK-325Φ140-Φ32510-40 4.0-16-250024*30013HNGK-355Φ140-Φ35510-40 4.0-16-250024*30014HNGK-406Φ165-Φ4068-30 4.0-16-300024*40015HNGK-426Φ165-Φ4268-30 4.0-16-300024*40016HNGK-508Φ219-Φ5088-30 4.0-20-500030*40017HNGK-610Φ273-Φ6108-30 4.0-22-700030*40018HNGK-630Φ273-Φ6308-30 4.0-22-700030*40019HNGK-660Φ273-Φ6608-30 4.0-25-700030*40020HNGK-711Φ325-Φ7118-25 5.0-25-1000030*600

If you need detailed quotation list , please provide the following specification:
Product Parameters:
Pipe O.D.: φ??-φ????mm
Pipe Thickness:? MM-?? MM,
Length: ?-??m
Standard: Such as API, or X?? or X??