Niederlassung SLV München
UT Ultra sound testing
Ultrasonic testing makes it possible to find discontinuities in the interior of a component. Flat and voluminous discontinuities such as cracks, binding defects or pores can be detected with a high probability of finding them. Due to the physical conditions, ultrasonic testing is often superior to radiographic testing (X-ray testing) to detect surface irregularities.
Ultrasonic imaging test (Phased Array)
Increasingly, in the technical field, the ultrasonic imaging test, as it is known from medical technology, finds applications. The representation of the test results as a so-called sector scan or C-picture is in many cases more vivid than the evaluation of the so-called A-pictures of a conventional ultrasound machine. In the ultrasonic imaging test, it should be noted that a large amount of information is presented, the interpretation of which requires sound prior knowledge. Prerequisite for the assignment of a "Phased Array" course is therefore a certification in level 2.
Qualification levels
ISO 9712 differentiates between three qualification levels with different areas of responsibility. After authorization by the employer, level 1 personnel may perform the test procedure and record the test results. The course of level 1 is primarily concerned with the distance adjustment of the device, so that the participant is able to, for example, carry out wall thickness measurements or to check plates for duplicates.
The usual course duration of two weeks can be considerably reduced by means of computer-based learning. Here, the participant is provided with the entire level 1 theory on a CD. After a four-day practical phase, the course concludes with a regular exam and has to be fully certified.
Level 2 personnel, after being authorized by their employer, may carry out level 1 activities and assess the results of the tests in accordance with standards and regulations. Sensitivity adjustment is an integral part of the level 2 training. This enables the participant to check and evaluate even complex geometries, such as welded joints, in accordance with standards.
Level 3 personnel can carry out level 2 activities and select the test method to be used. Another task is the creation of process descriptions on the basis of which level 2 personnel can work. The level 3 staff may take full responsibility for a test facility.
Course contents
The Level 1 course teaches the physical fundamentals of the test procedure. The distance adjustment is an essential part of the courses so that the participant can carry out wall thickness measurements with the vertical test head and can test simple geometries by means of angle probes. Likewise simple sensitivity adjustments are discussed so that the participant can work according to a test instruction.
In the 2-stage courses, the different methods for adjusting the test sensitivity (AVG method, cross holes in comparison bodies) are discussed in detail. This enables the participant to check even complex geometries, such as welded joints. The creation of test instructions based on current regulations is another component of the level 2 training.
In level 3 courses, the physics of the process is considered in depth. Based on standards and regulations, process descriptions are developed for different product sectors. The differentiation from other test methods is considered. Furthermore, different test methods like "Phased Array" or TOFD (Time of Flight Diffraction) will be discussed with your specific test statement.
Requirements
As an entry requirement for the course, a degree in a metalworking profession is recommended. Those interested in graduating as an engineer or technician have the opportunity to attend a level 2 course directly without having completed level 1 in advance. In this case, the participant should be able to carry out the path adjustment and know the most important operating elements of his device. In the event that no own device is available, you can also take part in a level 1 course or a 4-day computer-based course (CBT) to gain appropriate prior knowledge. In the case of the level 2 enrollment without previous level 1, the employer must confirm an industrial previous experience of at least 27 days.
Prerequisite for the test is the confirmation of the required vision capacity:
- The close vision ability must be sufficient to read the Jaeger Number 1 letters or Times New Roman 4.5 or equivalent marks at a distance of not less than 30 cm with at least one eye, with or without visual aid
- the color vision must be sufficient so that in the particular NDT process the contrast between colors or shades of gray can be recognized and distinguished, as determined by the employer
Furthermore, an industrial experience period must be confirmed by the employer before the examination. This depends on the intended completion and the professional career of the participant. In the event that the required experience is not available, we offer an pre-practical internship.
Certification
The qualification test is carried out by the personnel certification body of TÜV NORD. Usually the participant submits a certification application following his examination so that he receives a corresponding certificate. The certificates of TÜV NORD are DAKKS accredited and cover the industrial sector of welded joints when attending a VT 1/2 (w) course or, in the case of a multisectoral course, the industrial sectors "Castings (c)", "Forgings (f)", "welded products (w)","pipes and tubes (t)" and "rolled products (wp)". The certification according to PED is possible after the corresponding application.
Renewal and recertification
After a period of validity of the certificate of 5 years, a renewal must be requested from the personel certification body of TÜV NORD. In doing so, it must be confirmed by the employer that there has been a continuation of the candidate's activity without substantial interruption. The renewal is not connected with an exam.
The recertification, which is due after a further 5 years, is connected to a practical exam, the recertification exam, in levels 1 and 2. In the recertification exam, selected test pieces are to be practically tested, the test results are to be recorded and, for level 2, a test instruction is to be drawn up. Usually, the candidate prepares a recertification course in advance in order to get acquainted with the possibly revised regulations, device innovations and the creation of a test instruction.
Company courses
For groups of five or more participants, we are also happy to offer you our training courses in your company. In such in-house trainings, we can target your products and special requirements. We take care of test pieces and test equipment. Please organize a room for the theoretical lessons and maybe a separate room for the practical exercises.
We are happy to prepare an offer for your tailored further training.