Seam normalizing

2. Why tight thermal control is essential

2.1 Advanced alloys require precision

High‑strength steels are sensitive to heat input. The system must:

• Deliver sufficient temperature at the inner wall for full homogenization

• Maintain a wider heat pattern to cover the entire Heat Affected Zone (HAZ)

• Keep the outer wall temperature as low as possible to avoid coarse grain re‑growth

This balance is difficult to achieve with conventional systems but is a core strength of ENRX solutions.

2.2 Integration into inline production

Seam normalizing is typically an inline process, meaning it must integrate with welding, cooling, and other downstream operations. Floor space is often limited, especially since the pipe requires air‑cooling before quenching.

Traditional coil systems can be unnecessarily long and energy‑intensive.

3. ENRX breakthroughs in seam normalizing

ENRX has developed significant advances in simulation, system architecture, and coil design. These innovations deliver several key benefits:

3.1 Smaller installation footprint

The unique ENRX coil concept reduces total line length while maintaining uniform heat distribution through the wall thickness.

3.2 Alloy- and gauge‑specific heating zones

Powerful ENRX simulation tools allow precise development of heating and cooling zones tailored to each steel grade and wall thickness. This is critical for modern X‑grade materials in oil and gas.

3.3 Minimal surface heating

The systems are designed to achieve inner‑wall homogenization without overheating the pipe’s surface.

3.4 High uptime through advanced controls

ENRX process control technology offers:

• Seam tracking (manual and automatic)

• Temperature monitoring and regulation

• Independent control of up to four heaters

• Process parameter recording

• MES connectivity

These features ensure consistent operation even at high production speeds.

4. Engineered for demanding pipe manufacturers

ENRX seam normalizing systems are built to ensure:

• Inner-wall temperature is high enough to achieve full homogenization

• Heat distribution covers the entire HAZ

• Outer-wall temperature remains controlled to avoid microstructural degradation

• Repeatable results, even with challenging alloys or thick‑wall pipe

The technology is already used globally in demanding pipe mills requiring reliable, stable, and efficient normalizing.

5. Tracking options for every line configuration

ENRX offers three types of seam tracking systems — ensuring optimal induction coil alignment in all production scenarios:

5.1 Horizontal Tracking Systems

Inductors positioned above the pipe track the weld seam horizontally. Ideal for stable, predictable seam positioning.

5.2 Orbital Tracking Systems

The coil moves orbitally to maintain a constant distance between the inductor and the weld, compensating for pipe twist.

5.3 Travelling Coil Systems

If the line stops, the inductor can track backwards along the pipe to complete the normalizing cycle, minimizing scrap.

6. Components of an ENRX seam normalizing system

A complete ENRX system typically includes:

• A Sinac induction power converter

• Workstations equipped with ENRX induction coils

• Flexible power cables for optimized layout

• Advanced process control with real‑time monitoring

• A quick‑lift safety device to protect the coils from damaged or open seams

These components all work together to form a compact, efficient, and highly controllable solution.

7. High uptime, high throughput, high quality

ENRX systems are designed for maximum reliability and throughput. With advanced software, intelligent sensors, and robust components, the normalizing process is stable, predictable, and optimized for high‑volume industrial environments.