Measuring Technology

GMS-I Inside Profile Measurement

MSG Measuring Technology

GMS-I Inside Profile Measurement

The GMS-I permits creation of a digital image (“digital twin”) of tubes, and specifically in large pipes. A roller track moves the pipe to be inspected through a measuring head attached to a lance for measurement of the inner geometry. The measuring principle of the GMS-I is based on a default laser cutting procedure where profile measurements matching the scanning frequency are performed on a pipe. They can then be inspected for geometrical tolerance violations after passage.

Product areas & Areas of application

Product areas:

  • LSAW
  • ERW
  • Seamless pipes

Areas of application:

  • During calibration with the bending press
  • During transport in the adjustment area


  • Steel, brass, aluminium, etc.


The GMS-I can, for example, record the inner geometry in realtime during bending or diameter reduction of a tube.

Inspection features & Interface

Inspection features:

  • Averaged inner diameter [mm]
  • Maximal and minimal diametric inner diameters [mm]
  • Inside global out of roundness [mm]
  • Circumference inside [mm]
  • Maximum inscribed circle [mm]
  • Local out of roundness [mm]
  • Weld geometry (peaking, flattening, …)


  • Connection to process control level via Profinet.
    Measured data storage in SQL database.

Measuring speed/ accuracy

Measuring speed:

  • The measuring speed is 40 Hz.

Measurement accuracy*:

  • The measurement accuracy is ±50 μm
    *Data for standard system


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