Sharck™ Probes

Fast Inspection of
Surface-Breaking
Cracks without
Surface Preparation

An evolution making it even easier and faster to detect and size cracks in carbon steel.

The innovative design of Sharck probes is capable of addressing the inspection needs of several industries relying heavily on carbon steel, such as the onshore and offshore oil and gas, wind power, and structural industries.

Sharck is specifically designed for cracking in carbon steel using tangential eddy current array (TECA™) technology. These probes are capable of positioning cracks, measuring their length, and sizing them as deep as 7 mm (0.28 in). This can be achieved without removing paint or protective coatings, unlike more conventional techniques.

The second-generation Sharck weld probe is ergonomic and equipped with embedded control buttons

Benefit 1 — Advanced Array Technology

  • Incorporates tangential eddy current array (TECA)
  • Fast — Up to 600 mm/s (2 ft/s) depending on the probe model
  • Single-pass detection of longitudinal and transverse cracks
  • Wide coverage
  • High-performance multiplexing for optimal sensitivity
  • Reliable, less operator dependent compared to alternatives

Benefit 2 — Advanced Software

  • Easy interpretation with intuitive encoded 2D/3D C-scans
  • Actual crack depth measurements — Not based on theoretical modelling
  • Automatic readings — Crack length and depth, liftoff
  • Auto-compensation — Live monitoring of liftoff and permeability variations
  • Full data recording and archiving capabilities

Benefit 3 — In Line With Recognized Eddy Current Certifications and Standards

Sharck probes return signals similar to conventional eddy current testing signals, making the technology easy to learn. The probes also comply with ASTM E3052.

How Does it Work?

Traditional pancake coil axes are perpendicular to the surface under test. TECA, on the other hand, uses tangential coils positioned on their sides, their central axes parallel to the surface under test. Eddy currents also flow parallel to the surface making them capable of “diving” under cracks. Find out more on the TECA page.

Butt Weld Probe Specifications

Coverage

53 mm (2.1 in)

Fingers

22 (11 × 2 rows)

Minimum number of channels

64

Minimum pipe diameter for circumferential weld scanning 

25.4 cm (10 in)

Minimum pipe diameter for axial weld scanning

40.6 cm (16 in)

Fillet Weld Probe Specifications

The second-generation Sharck fillet weld probe is more ergonomic and equipped with embedded control buttons

Coverage

30 mm (1.2 in)

Fillet Range

12.4–23.0 mm (0.50–0.91 in)

Fingers

12 (6 on cap, 6 on HAZ)

Minimum number of channels

32

Minimum weld curvature radius

31.8 cm (15 in) concave and convex

Pencil Probe Specifications

Sharck pencil probes come in two casing types: straight and right angle. Both have the same specifications.

Sharck Pencil Probe

Coverage

Approximately 7 mm (0.3 in) at –6 dB

Finger

1

Minimum number of channels

32

Performances

Min. detectable longitudinal crack

  • Length: 2 mm (0.08 in)
  • Depth: 0.5 mm (0.02 in)

Results may vary according to crack location, liftoff, etc.

Max. measurable crack depth

7 mm (0.28 in)

Typical, with good accuracy, but can detect deeper cracks

Length sizing accuracy

±2 mm (0.08 in)

Typical when using 0.5 mm (0.02 in) scan resolution

Depth sizing accuracy

20 % to 40 %

Typical for a wide range of crack length-to-depth ratios

Scan speed

Up to 200 mm/s (7.9 in/s)

With full data recording

Liftoff tolerance

Up to 3 mm (0.12 in)

Non-conductive coatings and paints, with monitoring and auto-correction

Materials

Wide variety of carbon steels. Tested on:

  • AISI 1018, 1020, 1045, 1117, 4140
  • SA516, 537, 387
  • API 2W60
  • ABS A131
  • More

High-Resolution Probe Specifications

High-resolution Sharck probe for pipeline inspection

Coverage

71 mm (2.8 in)

Minimum number of channels

64

Compatible pipe diameters (NPS)

254–1220 mm (10–48 in)

Performances

Min. detectable longitudinal crack

  • Length: 2 mm (0.08 in)
  • Depth: 0.25 mm (0.01 in)

Results may vary according to crack location, liftoff, etc.

Max. measurable crack depth

3 mm (0.12 in)

Typical, with good accuracy, but can detect deeper cracks

Depth sizing accuracy

±10 % in X52 grade steel

Typically ±15–20 % for a wide range of crack length-to-depth ratios

Scan speed

Up to 600 mm/s (24 in/s)

With full data recording

Liftoff tolerance

Up to 2 mm (0.08 in)

Non-conductive coatings and paints, with monitoring and auto-correction

Materials

X52 grade steel

X56, X60, and more grades to be supported