Detection process
◆ Longitudinal, transverse, oblique, delamination defects and wall thickness measurement in seamless steel pipes
◆ Blind zone of pipe end: longitudinal, oblique and delamination detection ≤ 50mm
Transverse detection ≤ 50+2×T (T is wall thickness)
◆ Detection method:
1. Water film coupling type (applicable to large-diameter thick-walled pipes, which is easy to adjust)
2. Water column coupling type (applicable to small diameter and thin-walled pipes, with small near-field blind zone)
3. Full/partial immersion type (applicable to workpieces with heavy weight and rough surface)
4. Dry coupling type (electromagnetic ultrasonic)
◆ The eddy current detection system can be integrated to realize the combined automatic detection of ultrasonic eddy current
Detection standard
◆ GB/T5777-2008《Ultrasonic flaw detection method of the seamless steel pipe》
◆ YB/T4082-2000《Test Method for Comprehensive Performance of Automatic Ultrasonic Flaw Detection System for Steel Pipe》
◆ GB/T7735-2004《Inspection Method of Eddy Current Flaw Detection for Steel Pipe》
◆ API 5L American Petroleum Institute Standard《Steel pipe specification of pipe line》
◆ API 5CT American Petroleum Institute Standard《Specification for casing and oil pipe》
◆ ASTM 213M《Ultrasonic testing method for metal pipe》
◆ASTM A106 American Material Standard 《Seamless Carbon Steel Pipe for High Temperature》
◆ ASTM A519 American Material Standard《Seamless steel pipes of carbon steel and aluminum alloy steel for mechanical engineering》
System software (Function description, interface display)
1.Integrate probes with the same function on a strip chart through software to reduce the problem of small displayed images caused by multiple channels
2.The automatic detection results can be stored and printed, and the detection records (detection curves and related data) can also be stored on the storage medium, the industrial computer could permanently stores the continuous detection records. When the detection results need to be modified, password authorization was needed.
3.Instantly display the quantity of genuine products and rejects on the screen of the flaw detector.
4.In the process of automatic detection, the system will automatically generate an audible and visual alarm when it detects defects or delamination and poor coupling in thickness measurement.
5.The system has a pre-alarm function. The pre-alarm line can be set at will, but it must be lower than the alarm line.
6.After the calibration of sample tube is completed, the relevant parameters can be stored in the industrial computer for use when the same specification is detected next time.
The form of mechanical structure
◆ Fixed gantry type (applicable to thick-walled large pipe)
◆ Mobile trolley type (applicable to offline detection)
◆ Cantilever beam type (applicable to online detection)
◆It can also be customized according to the specific requirements of the user on site
Technical key points
◆ Instrument parameters: Meet the European standard (EN12668-1), and the factory inspection is according to this standard, the European standard inspection certificate can be provided at the same time;
◆ Detection speed (ie repetition frequency): the detection linear speed is up to 60m/min (the technical index closely related to the detection speed is the repetition frequency, and the repetition frequency can reach 5KHz);
◆ Channel independence: The channels are strictly independent, each channel has its own independent emission and reception timing control;
◆ Instrument scalability: The number of channels can be expanded according to the actual needs of the user, such as when detection or meeting higher detection standards when additional channels are needed;
◆ The instrument adopts modular design, maintenance is convenient and quick;
◆ Image display of C-scan thickness measurement, the thickness measurement display can be at least 64 or more gradations, and the circumferential and axial thickness distribution can be obtained at the same time, and the thickness measurement accuracy is 0.1mm;
◆ Mechanical design, processing, installation and debugging: experienced mechanical design team, trustworthy cooperative processing unit, standardized management of assembly and debugging, accumulated rich experience in similar projects, well-known brand of matching outsourcing parts;
◆ Control part: using domestic and foreign well-known brand components, the control program is in accordance with the beat of the customer's production line, fully protecting the safety of personnel and equipment, and the operation is humanized. The Op operation terminal displays the operation status and fault information.
Technical specifications
◆Blind zone of the pipe end: longitudinal=0mm, delamination is 10mm, transverse=2WT+20mm
◆Detection function: longitudinal (two-way), transverse (two-way), delamination
◆Detection linear speed: ≤30m/min
◆Detection pitch: 60mm~120mm
◆Omissive detection rate of flaw detection: 0%; Misdiagnosis rate of flaw detection: ≤3% (calibration of sample pipe)
◆Defect location error: ≤±25mm (axial)
◆Circumferential sensitivity difference: ≤3dB
◆Signal to noise ratio SNR: ≥10dB
◆Stability: ≤2dB
