ENRX induction system performing seam normalising on a moving steel tube
Induction Heating
Seam Normalizing Systems
Induction-based seam normalizing systems designed for longitudinally welded pipes, providing precise, controllable and efficient heat treatment for oil and gas pipe production.
Manufactured byENRX
4 stationsIndependent heaters
NQN / NQTTechnologies
MESCompatible control
Seam trackingCamera option
Overview
Seam normalizing for welded pipe
ENRX seam normalizing systems provide highly accurate, reliable and controllable heat treatment for longitudinally welded pipes. new generations of high-yield, thermo-mechanically processed steels require extremely precise heating profiles. ENRX addresses these challenges with advanced simulation modeling and optimized coil design that deliver accurate alloy- and gauge-specific heating and cooling zones.
The systems integrate easily into existing or new welding lines and are engineered to minimize installation length thanks to efficient air-cooling and optimized coil geometry. ENRX provides NQN and NQT technologies for full inner-wall homogenization, controlled heat-affected-zone (HAZ) coverage, and minimal outer-wall overheating.
Control systems—designed specifically for Induction—ensure precise temperature control, seam tracking using horizontal, orbital or travelling coil systems, and independent control of up to four heating stations. Advanced simulation tools (page 3) ensure optimized heat patterns across the pipe wall.
Applications
Where seam normalizing is used
ENRX induction heating system performing seam normalising on steel pipe during inline tube production
Glowing red-hot weld seam on a pipe undergoing ENRX induction seam normalising treatment
Longitudinally welded pipes for oil and gas pipelines
Heat treatment of weld zones requiring full homogenization
Normalizing of high-yield steels and advanced alloys
Pipe mills requiring horizontal, orbital or travelling seam-tracking systems
Inline integration with high-speed pipe production lines
Features
Simulation, tracking and control
- Advanced simulation-based coil and system design for precise heat profiles
- Smaller installation footprint thanks to optimized coil geometry
- Minimal surface heating with accurate inner-wall homogenization
- Seam tracking options: horizontal tracking, orbital tracking, travelling systems
- Control of up to four independent induction heaters
- MES-compatible control system with data logging and reporting
- Quick-lift device to protect coils from open seams or deformed pipes
- Seam tracking camera for precise alignment of induction coils
Benefits
Accurate heat across the wall
Reduced installation length → lower investment cost
Accurate alloy-specific temperature control → consistent metallurgical quality
Minimal surface overheating → avoids coarse grain re-growth and improves pipe integrity
High uptime due to advanced control systems and reliable design
Seam tracking ensures correct HAZ coverage and reduced scrap
High throughput suitable for oil & gas pipe production lines
Easy integration into existing welding lines
Need support with this product?
Share your application and process requirements, and our Thermal Process Solutions team will support you with the suitable product information.
Other Products in Induction Heating
Explore other products available within the same product category and open each page for complete technical details.
Sinac® – Stationary Induction Heating Systems
A stationary induction heating system delivering precise, contactless, efficient and repeatable heat for a wide range of industrial applications.
Weldac – High-Output Solid-State Tub & Pipe Welders
A complete family of high-output solid-state induction welders for tube and pipe production, delivering high efficiency, compact design, and minimal operator intervention.
MINAC – Mobile Induction Heating Systems – all-in-one-solution
A fully digital, mobile, flexible induction heating system equipped for Industry 4.0, offering precise, efficient heating for a wide range of applications.
HardLine – Industrial Heat Treatment Systems
A comprehensive family of induction heat treatment systems for surface and through hardening, ranging from small manual units to large, automated turnkey plants.
Ventac – Portable Air-Cooled Induction Heating System
A compact, portable, air-cooled induction heating system designed for preheating, post-weld heat treatment, and maintenance applications in shrink-fitting and demanding industrial environments.
HardLine M – Modular Vertical Hardening Machine
A new-generation modular vertical induction hardening system offering maximum flexibility, Industry 4.0 readiness, and suitability for a wide range of hardening and tempering applications.
Wire and Cable Heating Systems
High-efficiency in-line induction heating systems for structural wires, cables, conductors, and optical fiber production.
Induction Bonding System
A high-precision induction bonding system used for curing adhesives and sealants in automotive aluminium and steel panel assemblies.
Induction Heating Coils
A new-generation modular vertical induction hardening system offering maximum flexibility, Industry 4.0 readiness, and suitability for a wide range of hardening and tempering applications.
Tube Welding Consumables
A comprehensive range of high-performance consumables for high-frequency tube, pipe, and profile welding applications.
TERAC 25/40 – Deck and Bulkhead Straightening System
A turnkey induction heating system designed for shipyards, ideal for straightening steel decks and bulkheads with high productivity, low cost, and safe operation.
Shrink-Fitting System – Electrical Motors & Pumps
Induction heating system designed for fast, precise and safe shrink-fitting of bearings, rotors, impellers, and pump components.
Railway Induction Heating Systems
Advanced induction heating solutions for maintenance, repair and manufacturing operations across the railway industry.
Induction Metal Melting Furnaces – FIB / DAB / FIM / LAB / FAR
Induction furnaces designed for clean, efficient, and precise melting of ferrous and non-ferrous metals, suitable for small to mid-size foundries and laboratories.
Induction Brazing System
A comprehensive induction brazing technology offering fast, precise, clean and repeatable joining for a wide range of metals and industrial applications.
Induction Brazing System for Short-Circuit Rings
A high-precision induction brazing solution designed to braze short-circuit rings with minimal heat input, high accuracy and outstanding joint quality.
Induction Brazing System for Faucets
A high-precision, flame-free induction brazing solution designed to deliver efficient, repeatable and aesthetically clean brazed joints for faucet manufacturing.
HardLine – Vertical Heat Treatment Machines (VS / VM / VL / VXL)
A range of vertical induction heat treatment machines designed for small to very large components, featuring CNC control, modular design, and high productivity.
HardLine Horizontal Heat Treatment Machines – HC / HP / HH Series
High-productivity, modular horizontal induction heat treatment systems designed for bars and shafts, offering continuous, pusher, and hybrid machine configurations.
Coating Removal System
An induction heating system designed for fast, clean, and safe removal of paint and industrial coatings, reducing stripping time by up to 90% compared to traditional methods.
Chain Heat Treatment System
An in-line induction hardening and tempering system designed to produce premium-grade industrial chain with high speed, precision and consistency.
Bolt Expansion System
An induction-based system for fast, safe and precise expansion of bolts used in turbines and heavy-duty assemblies.
Billet Heating Systems
Induction billet heating systems are designed to rapidly and efficiently heat billets of various metals before forging.
Bar End & Partial Heating Systems – CBB (Horizontal) & CHV (Vertical)
Induction heating systems are designed for bar end and partial heating with high speed, precision, and automation capability.