Scana Steel Björneborg AB of Sweden has supplied high quality stress joints (18.5 metres long conic steel pipes) to the offshore industry for years.
These products have pre-viously been 100% ultrasonic inspected by manual proce-dures. The manual inspection time was about 55 hours for each pipe unit.
An automated P-scan solution has reduced inspection time to 11 hours per unit. The huge timesavings obtained with the automated P-scan solution will have paid back the investment after inspection of less than 100 pipe units. However, the investor obtained in addition these benefits:
- All pipe units are 100% inspected by automatic and identical uniform operations
- Each pipe unit got its inspection data automatically filed as part of its quality control documentation
- The personnel operating the inspection system obtained a highly improved working environment
- Reduction of manpower - resulting in cost savings
The P-scan solution uses the P-scan 4 and a special scanner set-up with ultrasonic probes mounted in a frame perpendicular to the pipe axis (see photo). During inspection the pipe unit rotates with a constant circumferential velocity while the scanner frame moves at a constant speed along the pipe.