Description
Yuantuo’s pipe-annealing equipment uses advanced induction heating to perform reliable annealing on steel pipes—including OCTG (casing/tubing). With precise temperature control and high heating capacity, the system helps pipes reach the desired physical and metallurgical properties, and is suitable for annealing across all common pipe types and grades.
Key Features
High Heating Efficiency
Induction heating brings pipes to temperature rapidly and uniformly, boosting throughput while ensuring even temperature distribution during the cycle.
Wide Size Compatibility
The line handles multiple diameters and wall thicknesses. Its flexible, configurable design adapts quickly to different pipe sizes and annealing requirements.
Accurate Temperature Control & Automation
A PLC control system paired with infrared pyrometry monitors each pipe’s temperature in real time. Closed-loop control automatically adjusts power to keep every pipe at the target annealing temperature—reducing variation and improving consistency. Full-process automation minimizes manual intervention, improving productivity and safety.
Energy-Saving & Environmentally Friendly
High-efficiency power supplies and optimized heating practice lower energy use and harmonic pollution, while improving process stability—aligned with modern environmental standards.
Application Scope
OCTG and related tubulars: Efficient annealing for casing/tubing and other oilfield pipes to achieve required properties and downstream processability.
General steel pipes: Annealing for Ø60–Ø600 mm carbon steel, alloy steel, and stainless steel pipes—including high-strength, high-spec materials.
Induction Heating Process
Preheating
Pipes may be preheated before entering the inductor to avoid thermal shock and minimize internal thermal stresses.
Induction Annealing
In the induction furnace, pipes are uniformly heated to the specified annealing temperature. Induction converts electrical energy to heat efficiently and evenly across the cross-section.
Temperature Control & Auto-Adjustment
IR sensors continuously read surface temperature; the PLC automatically trims power to hold setpoints and achieve the required thermal profile for each size/grade.
Controlled Cooling
After annealing, pipes follow a defined cooling regime to maintain mechanical properties and dimensional accuracy for subsequent processing.
Technical Advantages
Effective Energy Savings
Optimized power configuration and efficient inductors reduce specific energy consumption and raise heating efficiency—lowering operating costs.
Precise, Traceable Temperature Control
PLC + infrared temperature monitoring provides tight control and uniform temperature distribution to meet demanding process specifications.
Fully Automated, Intelligent Operation
Automatic control of key parameters throughout the cycle reduces human error and increases line productivity.
Safe & Reliable
Multi-level protection—such as over-voltage/over-current safeguards, phase-loss detection, and interlocks for cooling/water flow—supports stable operation under high load, reducing failure rates and extending equipment life.
By combining advanced induction technology with robust automation, Yuantuo’s Steel-Pipe Induction Annealing System delivers an efficient, energy-saving, and precise annealing solution for OCTG and general steel pipes. Contact us for a customized process proposal and detailed quotation.
