Inspection Services

Encoded Phased-Array Ultrasonic Testing

Ultrasonic phased-array technique used in encoded mode require that probe(s) are attached to a scanner that records probe(s) position.  Since ultrasonic data on screen is numerical, it is only required to record inspection data according to probe(s) movement to gather all this data in three dimensions and in a coherent way.  Inspection data can then be reviewed and analysis is done as a separate step following data acquisition.

Straight Beam Mapping

When a straight beam linear scan (L-scan or E-scan) is encoded, it is possible to get a mapping of the inspected part, it could present remaining thickness or indications  within plate thickness.  Essentially, it is just a large number of conventional ultrasonic signals (A-scans) recorded at meaningful positions. The type of view obtained is generally called a C-scan, colors in this type of view could represent plate thickness, depth or amplitude of indications within the plate, depending on desired data processing.

PAE Blisters_1_FR

PAE Thickness_2_FR

Encoded Scanning with Angle Beam Probe(s)

This type of scan is generally used for weld inspection replacing radiography, or for cracks characterization.  Probes need to be attached to a scanner to record their position while they are moved usually in one particular axis. Inspection data is recorded and can reviewed any time after the acquisition step. Position of discontinuities can be measured in all three dimensions, but data is generally represented in top or side views through the volume of interest.

We successfully demonstrated some techniques to the RBQ (Quebec province Authorised Inspectors agency).  It is still possible that some applications require a specific demonstration.

PAE Soudure_1_FR

 

Few Applications :

Straight Beam Probe Mapping

  • Mapping of corroded areas
    (flat or cylindrical surfaces, piping,
    nozzle necks, spherical heads)
  • Evaluation and follow-up of eroded areas
  • Hydrogen blistering (HIC) monitoring

Angle Beam Probes Encoded Scans

  • Welds inspection in lieu of radiography
    (pressure vessels, piping, storage tanks)
  • Cracks characterisation and monitoring

Advantages :

  • Acquisition speed
  • No radiation safety hazards
  • Numerical data available for audits
  • Data comparison with previous or later inspections
  • Thickness results in Excel format for structural calculations or corrosion rates

Disadvantages :

  • Heavy data to record and store
  • Data interpretation less intuitive than radiography
  • Usually requires a qualification process for weld inspection
  • Limited versatility from the scanner

Standards :

  • ASME, Sect. VIII, Div. 1 and 2
  • ASME, Sect. I
  • ASME, B31.1 and B31.3
  • API 650 and 653
  • ASTM, E2700
  • ASME, Sect. V, Art. 4 (Mandatory Appendices)
  • ASME, BPV Code Cases 2235-9, 2559, 2600
  • ASME, B31.3, Case 181
  • API, 650, Appendix U
  • AWS D1.1, Part G

Personnel Certifications :

  • API, QUPA (PAUT)
  • PCN, PAUT Level 2
  • ASNT, SNT-TC-1a-2011 (PAUT)
  • ONGC 48.9712/ISO 9712 (UT)
  • ASNT NDT Level 3 (UT)

Services offered from :

  • Quebec city, QC
  • Laval, QC

Technical sheets have been prepared for main applications.  Do not hesitate to contact us for more detailed information.