Monday, December 31, 2018

Non-Destructive Testing (NDT) – Guidance Document: An Introduction to NDT Common Methods

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Non-destructive testing (NDT) is a mechanism used by engineers to detect defects in materials and structures, either during manufacturing or while in service. Typically, the methods used are ultrasonics, radiography, magnetic particle, eddy current, dye penetrant and visual methods. This important and growing industry is involved in applying these proven techniques and procedures to the full range of engineering structures.

When NDT is deployed to best effect as part of the complete engineering design process, it ensures the safe, reliable and long-lasting integrity of structures, such as power stations, aircraft, oil & gas installations and other safety-critical plant. Every day, more than 25,000 inspections are carried out in factories and on-site in the UK to detect defects and damage in a huge range of products, plant and structures; it is estimated that there are more than 120,000 inspectors operating worldwide.

The NDT community has formal mechanisms for skills development from Engineering Technicians through Chartered Engineer to Doctorate level. The global NDT industry had an estimated turnover in 2012 of about $5.6 bn (about £3.25 bn). This levers a much greater benefit to end-users through intelligent and reduced risk management.

Regulatory bodies demand that NDT is used to demonstrate compliance with safety and other legislation and, for unregulated industries, the commercial advantages of reduced warranty claims, improved plant reliability and higher customer satisfaction justify its use. NDT inspection personnel are required to be fully competent, trained and certificated in accordance with national and international standards.

1. Introduction
2. Visual Testing
3. Ultrasonic Testing
4. Radiographic Testing
5. Eddy Current Testing
6. Magnetic Particle Testing
7. Penetrant Testing
8. Infrared Thermography
9. Other Methods and Competencies

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