End-to-end technologies for carbon steel, stainless steel, and specialty alloys covering melting, casting, hot rolling, cold rolling, annealing, pickling, coating, slitting, cutting, and quality inspection
Trusted by leading steel producers worldwide for precision measurement and control across the entire production chain
Are You Worried About Your Coils Feeding Your Line Are Not in Thickness Tolerance?
In the metal processing industry, the thickness tolerance of a coil is not merely a specification on a datasheet; it is the bedrock upon which product quality, tool life, and profitability are built.
If you are involved in a rolling, slitting, or forming operation, you have likely experienced the anxiety of a coil's thickness drifting out of tolerance. This is a valid concern.
The impact of a coil that varies from its nominal thickness is profound, yet often underestimated. Modern roll-forming and stamping lines operate with roll gaps and tooling set for a specific material gauge. As explained by industry experts, even small changes in thickness alter how the steel behaves under pressure. A section of the coil that is slightly thicker will resist bending more, stretch differently, and rebound unevenly. The immediate result can be twisted, non-uniform, or defective profiles that fail to meet tight customer specifications. Furthermore, this inconsistency creates misalignments
that place undesirable side loads on rolls and tooling, accelerating wear and increasing maintenance costs.
LGE provides end-to-end measurement and control solutions for steel mills from
hot rolling to finishing lines. Our portfolio includes Automatic Gauge Control (AGC), thickness measurement for quality control, width gauges, flatness and planarity systems, roughness measurement, inline pipe and profile shape detection,
weld inspection, and emulsion fluids control. With over 30 years of experience, we deliver precision, reliability, and actionable insights to optimize your steel production.
Automatic Gauge Control
- Technology:X-ray / Laser thickness gauges
- Response Time:<50 ms
- Tolerance:±0.5% of nominal
- Actuators:Roll gap, bending, speed, tension
Thickness Measurement (QC)
- Range:0.1 mm - 200 mm
- Accuracy:From ±0.5 microns to ±0.05%
- Technologies:Laser, X-ray, Ultrasonic
- Application:Hot/Cold rolling, QC lab
Width Measurement
- Range:200 mm - 3000 mm
- Accuracy:±0.2 mm
- Technology:Dual-edge laser triangulation
- Edge Tracking:±200 mm lateral movement
Flatness & Planarity
- Zones:16 to 120 across strip
- Accuracy:±1 I-unit
- Defect Types:Center wave, edge wave, quarter buckle
- AFC Integration:Bending, shifting, cooling zones
Roughness Measurement
- Parameters:Ra, Rz, Rmax, Rp, Rv
- Technology:Laser scattering / Confocal
- Application:Surface finish QC, texture analysis
- Speed:Inline up to 20 m/s
Pipe & Profile Shape
- Products:Pipes, tubes, beams, rails, bars
- Parameters:OD, ID, ovality, straightness
- Technology:3D laser profilometry
- Inline:100% inspection at line speed
Weld Detection & Inspection
- Defects:Lack of fusion, porosity, undercut
- Technology:Eddy current / Laser shearography
- Application:ERW, SAW, laser welded pipes
- Reporting:Real-time defect mapping
Emulsion & Fluids Control
- Parameters:Concentration, temperature, pH, conductivity
- Technology:Inline refractometers / sensors
- Benefits:Optimized lubrication, reduced consumption
- Integration:PLC / DCS for automatic dosing
Integrated Steel Mill Solutions
From melt shop to finished product - complete measurement coverage
Slab/Billet
Dimension, temperature, surface
Hot Rolling
AGC, width, flatness, temp
Pickling
Thickness, width, surface
Cold Rolling
High-precision AGC, flatness
Annealing
Gauge monitoring
Coating
Coating weight, width, flatness
Pipe Mill
Weld inspection, shape, OD
Finishing
Final QC: thickness, width, flatness, roughness
Why Steel Producers Choose LGE
Tighter Tolerances
Reduce scrap by up to 40% with precision control
Faster Response
less than 1 ms control loop for immediate correction
Higher Yield
Increase first-pass yield by 15-25%
Closed-Loop Integration
Direct connection to mill actuators
AI-Assisted Optimization
Adaptive learning for material grades
24/7 Global Support
Remote diagnostics and on-site service
Proven Performance in Steel Mills
Real results from global installations
Seamless Integration with Your Existing Mill Infrastructure
All LGE systems support PROFINET, EtherCAT, Ethernet/IP, Modbus TCP, and analog interfaces for direct connection to existing PLCs, SCADA, and MES systems.
