Internal tube inspection
|
Intelligent UT pig
Applications
- Ultrasonic inspection of 6"/8" pipelines
- Flaw detection and characterisation: material thickness issues, dents, internal and external corrosion, pitting etc.
- Inspection of distances from a few metres to several hundred kilometres
| Characteristics |
|---|
|
Wall thickness
|
2.1 mm to 35 mm |
|
Max. pig displacement speed
|
3 m/s |
|
Acceptable temperature range
|
0° C to 50° C |
|
Maximum operating pressure
|
40 bar |
|
Minimum radius of bend sections
|
1 D to 90° |
|
Tool length
|
2.65 m |
|
Tool weight
|
28 kg |
|
Number of modules
|
7 (including propulsion module) |
|
Axial distance between two acquisition sites
|
2 mm |
|
Circumferential distance between two sensors
|
4.2 mm |
|
Circumferential distance between two beams on
the internal tube wall
|
7.5 mm (6"), 5 mm (8") |
|
Longitudinal positioning accuracy with respect to
upstream tie-in weld
|
+/- 10 mm |
|
Circumferential positioning accuracy
|
+/- 5° |
|
Battery life
|
11h per battery module carried |
|
Number of ultrasound sensors
|
64 (6") / 128 (8") |
|
Pitting detection
|
dia. > 5 mm |
|
Dent mapping
|
deflection > 2 mm |
|
Data acquisition methodology
The raw ultrasound signal (A-SCAN signal) is processed as follows: 
