Visual 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

Note: it is possible to access the final exam without having achieved the required experience; in this case, the exam is valid for one year and the certification is valid from the submission of the declaration of the employer, if the exam is passed.

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 recognized professional qualification awarding body. At the end of the course the candidate will attend the exam for obtaining the qualification of NDT Level II Operator – VT method in accordance with the Recommended Practice n° SNT-TC-1A.

General contents

• Introduction to the CND
• Qualification and certification of NDT personnel
• 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)
• Physiology of the vision
• The eye
• Defects of vision
• Methods used for the vision examination
• Principles of photometry and lighting
• Fundamental laws of light
• Measures of lighting
• Recommended light levels
• Lighting techniques for examination
• Visual inspection, control regulations and procedures
• Sheet, strips, laminates round and profiles
• Forgings
• Tubes
• Castings
• Welds
• Characterization of defects
• Information on the examination of non-metallic materials and composite materials Acceptance criteria and operating instruction

Course duration

About 40 hours