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RTIS: Rotating Tube Inspection System

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The rotating tube inspection system (RTIS) is a turnkey solution that uses phased array probes integrated into a fully automated testing system to meet stringent requirements for volume and surface inspections. Key benefits include:

  • Minimize your dependency on operator skill with automatic calibration
  • Detect defects at production speed with calibration check
  • Familiar to major oil companies
  • Detects oblique defects to meet current and pending industry standards
  • Get the most out of the system with 2D mapping and end-of-tube inspection capabilities

Designed to be an easy-to-use solution for helping ensure the quality of seamless and electric resistance welded tubes, the system includes:

  • Dedicated project management
  • Instruments, probes, and mechanical equipment
  • Water management system
  • Software
  • Commissioning, training, and after-sales support

Full Body Tube Inspection

Inspect for longitudinal, transverse, oblique, and lamination defects, and measure wall thickness.

  • Novel water wedge enables many degrees of freedom to accommodate pipe movement and provide excellent coupling
  • Design leaves only small untested tube ends
  • Automatic calibration for repeatable results
  • High sensitivity on small reference defects with a signal-to-noise ratio greater than 12 dB
  • Can be used to fulfill testing regulations (API-5CT and API-5L)

Maximize Your Productivity

The system is adaptable and can be configured to suit different types of inspections.

  • The number of inspection heads or electronics can be adapted to meet the required productivity level
  • Up to four apertures per phased array probe can be fired simultaneously
  • Large mechanical scan overlap covering up to 120 mm/r

Automatic Calibration

To achieve a thorough inspection, each phased array probe must be calibrated. During calibration, the apertures of each probe pass over a known defect, and the probe’s gain level is automatically adjusted. This feature enables users to easily perform and validate a precise calibration of each focal law, saving time without relying on the user’s skill.

  • All probes can be calibrated in a single automatic sequence
  • Calibration check performed under normal production conditions
  • Each reference defect is validated to help ensure they’re detected above the alarm level
  • Results are displayed in an easy-to-interpret strip chart and weld mapping view


Standard Product Range Diameter 60 mm to 508 mm (2 3/8 in. to 20 in.)
Wall Thickness 4 mm to 75 mm (0.157 in. to 2.95 in.)
WT/OD < 0.3
Length 6 m to 15 m (20 ft. to 50 ft.)
Speed 60.3 mm (2 3/8 in.) : 1 m/s (200 ft./min) 244.4 mm (9 5/8 in.) : 0.25 m/s (50 ft./min) 406.4 mm (16 in.) : 0.15 m/s (30 ft./min)
Inspection Coverage Axial Pulse Density (APD) Configurable (0 to > 50% overlap)
Radial Pulse Density (RPD) Configurable (1.0 mm to 2.0 mm)
Data Presentation Real-Time Inspection Results C-scan, strip charts, and alarms
Parameter Setup A-scan, B-scan
Inspection Layout 20 different user-configurable layouts
Inspection Modes Typical Inspection Modes Longitudinal, transverse, oblique, lamination, and wall thickness measurement
Firing Modes Pulse-echo
Inspection Mode Configuration Several inspection modes can be performed simultaneously on the same PA probe.
Detection Capabilities for Typical Reference Defects API References 12.7 mm/25.4 mm N10 and N5, ID and OD longitudinal, traverse, and oblique notches; 3.2 mm and 1.6 mm through-drilled hole (TDH), 6.35 mm flat bottom hole (FBH)
Signal-to-Noise Ratio (SNR) > 12 dB
Repeatability L notches: < 2 dB T and Ob notches: < 3 dB TDH 3.2 mm and FBH 6.35 mm: < 4 dB
Reporting and Data Storage Report types Inspection, calibration, and calibration-check user-configurable reports
Storage Real-time database inspection data storage


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