LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.
UOE mill adopts Uing and Oing forming
UOE Manufacturing ProcessAccording to different customers' requirements, the welded pipe can be expanded by mechanical or hydrostatic expander to enhance the dimension accuracy, and eliminate the residual stress.
UOE pipes Specifications
- Throughput: 400,000 MT
- Outside Diameter :Φ508-Φ1118mm (20"-44")
- Wall Thickness : 6.4-25.4mm (1/4"-1")
- Ouality Standards : API, BS, ASTM , JIS, DIN, GB , ISO, DNV
- Length :9-12.2m (30'-40')
- Grades : GB/T9711 L190-L555 (API 5L A-X80)
JCOE (J-ing, C-ing and O-ing) process
JCOE Manufacturing ProcessThis is the first large diameter longitudinal submerged arc welded (LSAW) pipe production line in China .The mill adopts continuous axis contorting J-C-O（J-ing, C-ing and O-ing）process with characteristics of high forming accuracy and efficiency as well as balanced distribution of forming stress.
JCOE pipes Specifications
- Throughput: 300,000 MT
- Outside Diameter :Φ406-Φ1829mm (16"-72")
- Wall Thickness :6.0-25.4mm (1/4"-1")
- Ouality Standards :API, BS, ASTM , JIS, DIN, GB , ISO, DNV
- Length :3-12.2m (10'-40')
- Grades :GB/T9711 L190-L555(API 5L A-X80)
Steel plate ultrasonic flaw detector
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
Steel plate ultrasonic flaw detector
Adopt the standard software function of Vision LE contrail controller and German original controller for industry only. Three cutting torches can work synchronously and cut the bevel rapidly and precisely, offer the eligible slabs for the next working procedure
Edge milling machine
Cutter head can fluctuate automatically according to the plate shape, that's to say, on the basis of plate roughness the cutter head can adjust its position automatically so that it can cut the same shape and dimension of bevel on both sides. In addition, the milling speed and quantity are adjustable according to steel grade, wall thickness and the shape of bevel. The coherence of cutter head and plate clamping system guarantees the invariable parameters during the entire milling process; accordingly it ensures the milling quality and lays a good foundation for the success of subsequent welding.
Pre-bending
According to different specification, pressing the two edges of the steel plate with the matched moulds to make round arcs that have some curvature, lest the straight edge influencing the roundness of the pipes.
View LSAW pipes range
Forming
Numerical control system adopts the international advanced CAD MAN of Belgium LVD Company. There are 16 numerical control shafts on the main and the assistant devices. Through the inspection feedback of the four grating rulers, the four main cylinders can be controlled accurately and act synchronously, all the above ensure the forming quality
End squaring & tack welding machine
The semifinished pipes will be seam-linked and backing-welded, all the procedure is continuous. All the above ensures the good pre-weld quality and the high efficiency
Manufacturing Process:
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Internal weld
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
External weld
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
Finishing machine
Circular tube finishing machine——Adopt three control methods such as automatic pressure control, automatic position control and manual control. Be operated neatly and conveniently. The roundness of the pipes can be ensured for that the pipes are formed with relevant arc mould as per various pecifications.
Straightening machine
The machine possesses the accurate micro-inching function, can adjust the micro-inching devices and V-shaped former block as per different specification. Besides, through removing the movable framework to the relevant position to press the pipe asper the curve situation can ensure the straightness.
Ultrasonic online flaw inspection
Controlled automatically by the micro-computer, the inspection blind area is less than 200mm; it can automatically identify the flaw in the weld and the heat effect area, give alarm and locate and mark the flaw, besides, determine the flaw grade and print the inspection report forms as well.
Hydrostatic test
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
X-Ray flaw detect
Radial Generator is imported from America, is used for 100% inspection of the internal & external weld with industrial TV, the image data is stored in real time, the part within 200mm of the pipe ends is taken picture with X-ray. The inspection result is traceable and the quality can be ensured.
Pipe end chamfering machine
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
Expanding mill
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
Numerical-control roll-bending machine
This large horizontal hydraulic pressure numerical-control three-roll-bending machine is mainly used for large diameter pipes. Its minimum cylinder diameter is 1300mm while the maximum wall thickness of pipes can reach 120mm. Its two lower rollers can be adjusted horizontally, and its upper roller depends on hydraulic pressure. Meanwhile, it can pre-bend the pipe ends so that material waste will be reduced. It has the advantages of precise roundness, high efficiency and automatic programmed operation.
Double welding wire automatic submerged arc welding machine
This machine is used to weld the longitudinal seam as well as circumferential seam. It has double welding wire and the maximum current is 1500A, and its welding speed can reach 1.2m/min.The welding head can revolve freely so that circumferential seam is available. Its power supply is from the famous Lincoln Company. This machine and welding seam are of high quality.
External weld
The device is controlled by microcomputer, which can automatically identify the flaw in the steel plate, give alarm, locate and mark according to the set standard of flaw detect and inspection; besides, it can comprehensively evaluate the inspection result, determine the flaw grade and print the inspection report forms as well. It has the characteristics such as easy operation and high inspection efficiency.
