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for automatic submerged arc carbon steel elbow on the large diameter welded steel pipe

更新日期:2013-07-13  浏览:1342

 

Foreign pipeline pipe accounted for 80% and only 20% domestic, but with the development of economy, people awareness, especially emphasis on safety, and improve the engineering design specifications, the new oil pipelines, large diameter welded steel pipe used more and more.
UOE technological process and main equipment
A two plate edges processed into the desired form, plate edge milling machine: two lateral sides of the tube sheet machining, and the two edges parallel degree reaches the specified tolerance range, preparing for manufacturing the pipe with high precision.
 
The steel plate side with steel plate radius of curvature radius equal to the formed steel pipe, steel pre-bending machine: milling machine processing of steel plate on both sides carbon steel elbow bevel edge bending. It avoids long molding machine molding steel straight edge, guarantee the plate roundness.
Full automatic pipe forming machine: bending forming of sheet metal finish.
Further joint and the welding, pipe welding machine: the molding machine qualified opening pipe blank, preparing for the internal, external welding.
Carbon steel elbow car carrying workpieces along the walking track, double wire welding machine: for automatic submerged arc carbon steel elbow on the large diameter welded steel pipe, with the host of workpiece carbon steel elbow.
Carbon steel elbow car carrying workpieces along the walking track, double wires welding machine: for automatic submerged arc carbon steel elbow on the straight seam steel pipe, with the host of workpiece carbon steel elbow.
Piecewise exert strong pressure from the outside to the long roundness poor pipe, so as to meet the relevant specifications and requirements.
Longman mobile sensory straightening machine is used for steel tube straightening.
Straight seam steel pipe chamfering machine: the pipe end by blunt edge as provided in the groove angle.
To improve the precision of steel pipe size, pipe expanding machine could the elimination of stress.
Check the set pressure has no permeability defect, 3000T hydrostatic testing machine for welded pipe: hydraulic test. Remove carbon steel elbow stress and forming stress, so as to ensure the use of steel pipe properties.
To detect the longitudinal, transverse defects and the heat affected zone of lamination defect. Line ultrasonic testing equipment: 100% lines of the ultrasonic nondestructive testing of weld.
With the development of rural environmental protection, petroleum and natural gas industry in China develop rapidly. Especially the national energy pipeline layout, the longitudinal submerged arc welding pipe increasing demand, the demand of diameter longitudinal domestic steel increased. West-East natural gas transmission project is the country's standard engineering, large diameter welded steel pipe 1820000 tons, of which 820000 tons for LSAW pipe single is only part of domestic steel pipe.
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