Magnetic Particle Testing – Level II
In the industrial sector every critical product (beams for construction, support screws, aeronautical components, automotive components, pressure vessels) should be checked to verify its integrity and compliance with applicable regulations.
It is well known that a small surface crack, harmless in normal conditions, when subjected to fatigue stresses, is constantly growing in size up leading to break the component.
The training of involved personnel in non-destructive testing is specified by the various standards such as ISO 9712, Recommended Practice n° SNT-TC-1A, NAS 410.
The qualifications can be obtained for areas of product and industrial sectors as castings (c), forgings (f), welded products (w), tubes and pipes, including flat products for the manufacturing of welded pipes (t), wrought products (wp), composite materials.
Candidates
Consultants, persons in charge of Quality Management Systems in welding, quality control managers, production managers, welding coordinators, personnel in charge of welding processes, welders and welding operators.
Prerequisites
Experience and specific knowledge of welding techniques and materials technology are required for a minimum of 1 year.
Requirements for qualification according to Recommended Practice n° SNT-TC-1A
- possession of the certificate of visual acuity also released by optometrist (Jaeger 1 or Times New Roman 4.5) and normal colour sense (Ishihara test)
- declaration of provided training issued by a SNT Level III (about 40 hours)
- declaration of experience achieved signed by the employer
- written practice
Teaching and support material
Handouts, books and texts, slides in ppt/pdf.
Course provision
The course is conducted in classroom or in blended mode (theoretical part online and classroom practice) with the support of qualified university professors, in partnership with a certification body. At the end of the course the candidate will attend the exam for obtaining the qualification of NDT Level II Operator – MT method in accordance with the Recommended Practice n° SNT-TC-1A.
General contents
- CND (comparison between methods and selection criteria)
- Defectology: in welded joints, in semi-finished (castings, forgings, flat products, pipes, plates, etc.), in machining (turning, milling, grinding, etc.), by heat treatment, in exercise (e.g., fatigue, corrosion, Tens current)
- Principles of magnetism and physical basis
- Magnetic materials
- Magnetic poles
- Magnetic field and its flaws
- Magnetic permeability (dia-, para-, iron-magnetism)
- Generation of magnetic fields (conductor, straight, coil)
- Direction magnetic field, flow intensity
- Relations between magnetic force, flow intensity and magnetic permeability
- DC, AC and rectified current
- Generation of current by straightening and half-wave and full-wave current
- First magnetization curve
- Degaussing
- Magnetic flux dispersed in the neighbourhood of discontinuities
- Magnetic flux dispersed in the neighbourhood of change of the section or geometry
- Effect of discontinuity orientation relative to the direction of the magnetic field
- Types and techniques of magnetization
- Methods of examination (with coil, with permanent magnet or electromagnet, with conductor loop, concatenating, with direct passage of current in the piece and tips)
- Direct and residual magnetization
- Magnetic particle powders
- Generality, characteristics
- Dry and wet magnetic particle powders
- Sizes and shapes
- Practices control demonstrations
- Demonstration with ferrules and electromagnetic techniques
- Criteria of calibration and certification
- Tools and auxiliary equipments (lux meter, photo fluorimeter, ASME sondes, Berthold sonde, gasometers with Hall sonde)
- Sample blocks
- Wood lamp Information on regulations and operating instructions
Course duration
About 40 hours