UOE pipes manufacturing process

UOE(Uing and Oing forming) is a method used for production of longitudinally welded large diameter pipes.

UOE pipe Manufacturing Process
UOE Pipe Manufacturing Process Demo

The UOE mill is the best suitable process to meet customers' requirements by virture of the characteristic of high production efficiency, stable product quality and various accessories for manufacturing and inspection.

Longitudinal edges of steel plates are first beveled using carbide milling equipment. Beveled plates are then formed into a U shape using a U-press and subsequently into an O shape using an O-press.

UOE Pipe Manufacturing Process

UOE mill adopts U & O forming, the formed pipes are welded inside through five internal welding stations with three wires, and welded outside through four external welding stations with three wires.

In accordance with different requirements of the customers, the welded pipe can be expanded either by mechanical or hydrostatic expander to improve dimensional accuracy, and eliminate residual stress.

UOE pipes
UOE equipment

The UOE mill features the most advanced technology and process, achieves high production efficiency, stable product quality and is equipped with complete inspection equipments.

UOE mill adopts U & O forming, the formed pipes are welded inside through five internal welding stations with three wires, and welded outside through four external welding stations with three wires.

Specifications

Quality Standards: API, DNV, ISO, DEP, EN, ASTM, DIN, BS, GB, CSA

Grades: API 5L A-X90,GB/T9711 L190-L625

In accordance with different requirements of the customers, the welded pipe can be expanded either by mechanical or hydrostatic expander to improve dimensional accuracy, and eliminate residual stress.

O.D. W.T. Length(m)
Min.Yield Strength(Mpa)
In. Mm 245(B) 290(X42) 360(X52) 415(X60) 450(X65) 485(X70) 555(X80) 625(X90)
20 508 6.0-26.0 6.0-25.0 6.0-23.0 6.0-21.0 6.0-20.0 6.0-19.0 6.0-17.0 6.0-15.0 9.0-12.3
22 559 6.0-26.0 6.0-25.0 6.0-23.0 6.0-21.0 6.0-20.0 6.0-19.0 6.0-17.0 6.0-15.0 9.0-12.3
24 610 6.0-27.0 6.0-26.0 6.0-24.0 6.0-22.0 6.0-20.0 6.0-19.0 6.0-17.0 6.0-15.0 9.0-12.3
26 660 6.0-27.0 6.0-26.0 6.0-24.0 6.0-22.0 6.0-20.0 6.0-19.0 6.0-17.0 6.0-15.0 9.0-12.3
28 711 6.0-28.0 6.0-27.0 6.0-25.0 6.0-23.0 6.0-21.5 6.0-20.0 6.0-18.0 6.0-16.0 9.0-12.3
30 762 7.0-28.0 7.0-27.0 7.0-25.0 7.0-23.0 7.0-21.5 7.0-20.0 7.0-18.0 7.0-16.0 9.0-12.3
32 813 7.0-29.0 7.0-27.0 7.0-25.0 7.0-23.0 7.0-21.5 7.0-20.0 7.0-18.0 7.0-16.0 9.0-12.3
34 864 7.0-29.0 7.0-28.0 7.0-26.0 7.0-24.0 7.0-22.0 7.0-21.0 7.0-19.0 7.0-17.0 9.0-12.3
36 914 7.0-30.0 7.0-28.0 7.0-26.0 7.0-24.0 7.0-22.0 7.0-21.0 7.0-19.0 7.0-17.0 9.0-12.3
38 965 8.0-30.0 8.0-28.0 8.0-26.0 8.0-24.0 8.0-22.0 8.0-21.0 8.0-19.0 8.0-17.0 9.0-12.3
40 1016 8.0-30.0 8.0-29.0 8.0-27.0 8.0-25.0 8.0-23.0 8.0-22.0 8.0-20.0 8.0-18.0 9.0-12.3
42 1067 9.0-30.0 9.0-29.0 9.0-27.0 9.0-25.0 9.0-23.0 9.0-22.0 9.0-20.0 9.0-18.0 9.0-12.3
44 1118 9.0-30.0 9.0-29.0 9.0-27.0 9.0-25.0 9.0-23.0 9.0-22.0 9.0-20.0 9.0-18.0 9.0-12.3

UOE pipes size range:

  • Outside Diameter: Φ508mm- 1118mm (20"- 44")
  • Wall Thickness: 6.0mm-30.0mm(1/4"-1")
  • Length: 9m-12.3m (30'- 40')

Weled steel pipe specification, Standard and identification

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.