Detection process
The steel pipe rotates in place, and the probe is driven by the manipulator, enters or rides across the steel pipe, and uses electronic scanning to make high-density sound beam incidence on the pipe wall. A variety of focusing laws can be configured. Realize the detection of delamination and non-delamination defects.
Detection standard
◆API SPEC 5L（Edition 46） 《Steel pipe specification of pipe line》
◆GB/T9711-2017《Oil and gas industry Steel pipe for pipeline transmission system》
◆SY/T6423.2-2013 《Automatic ultrasonic testing of longitudinal and/or transverse defects of welded steel pipe welds》
◆SY/T6423.3 -2013 《Automatic ultrasonic testing of delamination defects of steel strip/steel plate for welded steel pipe》
◆SY/T6423.4-2013 《Automatic ultrasonic testing of delamination defects of seamless and welded steel pipe》
◆ISO 10893-8-2011 《Automatic ultrasonic testing of delamination defects of seamless steel pipes and welded steel pipes》
◆ISO 10893-10-2011 《Automatic full-peripheral ultrasonic flaw detection method for seamless steel pipes and welded (except submerged arc welding) steel pipes for longitudinal and/or transverse defect detection》
◆ASTM A578 《Specification for direct sound beam ultrasonic detection of ordinary steel plates and composite steel plates for special purposes》
◆ASTM A435《Specification for longitudinal wave ultrasonic detection of steel plate》
System software (function description and interface display)
1. C scan clearly distinguish the shape of the defect
2. Reduce the blind zone of the transverse pipe end through the data processing associated with the B+C scan
3. Compensate the sensitivity difference of the same angle through software consistency, so that each channel of the same angle detects the same height echo of the defect
4. The same probe uses different focusing laws to extract different data to achieve transverse and delamination defect detection
Original result (including corner wave and weld wave)
Output result after software intelligent processing:
The form of mechanical structure
The pipe rotates in place and the probe moves axially for flaw detection.
Technical key points
Simple structure
The use of manipulators to replace traditional multi-axis moving parts has a strong associative perception and the whole system is integrated.
Visualization
Phased array imaging detection can have B scan, D scan, S scan and C scan at the same time, with defect image display, weld alarm is easily eliminated, and end defect recognition is easier.
Easy to operate
With electronic angle deflection, the angle can be adjusted by software, and it is easy to change specifications and debug, fully meet the detection standards of seamless steel pipe and welded pipe end, reduce mechanical design requirements, reduce debugging time, and improve production efficiency.
More flexible
The phased array can perform dynamic focusing of the sound beam, the focus depth is continuously adjustable, flexible and convenient, and the sensitivity and resolution are greatly improved. At the same time, the manipulator can realize flaw detection inside and outside the pipe. It is convenient, fast, flexible and efficient to change the model of the defected pipe.
Technical specifications
| Weld pipe | Seamless pipe |
Name | Technical parameters |
Steel pipe diameter(mm) | Φ323～Φ1420 | Φ168～Φ720 |
Material | Q235～X100 | High temperature alloy steel |
Length of steel pipe(mm) | 8000～18300 | 8000～12000 |
Weld width(mm) | 10～25 | / |
Weld reinforcement(mm) | 0.5～3.5 | / |
Wall thickness(mm)
| Spiral steel pipe：6.0～25.4mm Longitudinal steel pipe：6.0～40.0mm High frequency resistance welded pipe：4.0～21.0mm |
|
Steel pipe straightness | Less than 0.2% length of the pipe |
The weight of a single pipe(max) | 20 tons
|
Speed of rotation（m/min） | ≤30 | ≤45 |
Maximum pitch of spiral welded pipe(mm) | 2300
|
|
Spiral seam forming angle
| 40°～75°(Left rotation/right rotation) |
|
| Pipe temperature in the flaw detection area | 0℃～70℃ |
◆Blind zone of pipe end: longitudinal=0mm, transverse (backward)≤3mm (including groove), delamination=6mm
◆Detection function: longitudinal (two-way), transverse (two-way), delamination
◆Detection linear speed：≤30m/min
◆Detection pitch：≤50mm
◆Omissive detection rate of flaw detection=0%；
◆Misdiagnosis rate of flaw detection：≤3%（Simple pipe calibration）
◆Defect location error：≤±25mm（axial）
◆Amplitude change of defect wave：8 times sampling average±25%（3~4dB）
◆Signal to noise ratio ：≥10dB
◆Effective operating rate of equipment：＞99.8%
