The UOE process is a proven pipe fometer large-diarming technology specifically designed for the production of large diameter Tuyaux LSAW. Known worldwide for its high degree of automation, productivity and consistent product quality, the UOE process gets its name from three key steps: U-Forming, O-Forming and Expanding. The manufacturing process is strict, the process steps are complex and fine, and the pipes produced can meet the various needs of modern industrial fields.
What is the UOE Forming Process
The 3 Core Steps Of The UOE Process
- The U-forming stage
The steel plate is first beveled by an edge milling machine to ensure flat and accurate edges. The steel plate is then pressed into a U-shape using a large hydraulic U-forming machine. This stage requires precise pressure control to avoid material damage.
- O-forming stage
The U-shaped steel plate is fed into the O-forming machine, and gradually pressed into a round shape by high-pressure hydraulic pressure.O-forming is a key step to ensure the roundness of the steel pipe, which directly affects the subsequent welding quality.
- Expansion stage
After forming, the steel pipe is expanded mechanically or hydraulically to reach the final size. Expanding not only ensures uniform size, but also eliminates residual stresses and improves the pressure-bearing capacity of the steel pipe.
The Production Process of UOE Steel Pipes
The manufacturing process of U-O-E involves multiple steps from the preparation of raw materials to the final processing and quality inspection.
Raw material preparation and pretreatment: Remove oil, rust, oxide, etc. from the surface of the steel plate after hot rolling process, maintain the flatness and integrity of the steel plate surface, and ensure the subsequent welding quality.
U-shaped bending: U-shaped pressing is the first step in UOE steel pipe production. The U-shaped roll machine will press both ends of the preheated steel plate intoU-shaped tube billets by pressure.
O forming type: The U-shaped tube blank is pressed into a round tube by the cold bending and forming mold processing of the O-shaped press.
E-shape expansion: E-shape expansion is the last critical step of the U-O-E process. The O-shaped tube is extended by hydraulic or mechanical means to form a formed steel pipe.
Procédé de soudage : After the shape of the pipe is processed, long welds are welded using technologies such as high-frequency induction welding (HFW) or double induction welding (DSAW). Welding current, speed, temperature and other parameters should be strictly controlled during the welding process. Ensure the strength and toughness of the weld are up to standard.
Pipe processing and coating: Perform subsequent pipe processing, surface treatment and coating treatment according to customer’s project requirements. Increase the durability and service life of the pipe.
Quality control and inspection: Through ultrasonic inspection, X-ray inspection, hydraulic test, tensile test and impact test, the weld quality of finished steel pipes, pipe size and wall thickness and other parameters are measured and controlled. Ensure the high quality and high performance of the steel pipe.
UOE Steel Pipe Technical Parameters and Standards
Diameter Range: Φ508-Φ1118mm (20″-44″)
Wall Thickness Range: 6.4-25.4mm (1/4″-1″)
Length Range: 9-12.2m(30′-40′)
Material Grade: API 5L A-X80
Execution Standard: API, ASTM, BS, DIN, ISO, etc.
Advantages Of U-O-E Pipeline Process
The UOE piping process has significant advantages in the field of pipe manufacturing.
- High quality welding can be achieved
- Uniform wall thickness and precise control
- Good corrosion resistance
- Can meet the needs of large diameter engineering
- Protection de l'environnement et développement durable
Application Field
Steel pipes produced by the UOE manufacturing process are widely used in many fields due to their excellent properties.
- Water pipes and drainage pipes:UOE steel pipes have excellent sealing and corrosion resistance, ensuring the efficient use of water resources and environmental protection.
- Bridge bearing structure: U-O-E steel pipe with large diameter and large wall thickness is commonly used as the support column, diagonal brace and deck structure of the bridge.
- The support and outer wall of the building structure: UOE can be customized according to the needs.
