Posts

Showing posts with the label non destructive testing course

Visual Testing in NDT (Non destructive testing)

Image
  Visual Testing in NDT: Visual Inspection is method of visually inspecting the material for deciding the acceptablility of the material. Infact it is the very first inspection method in Non Destructive Testing methods. Sometimes the Visual Inspection is carried out with aid of additional Instruments and Devices such as Measurement tools & Vision aids. What are essentials for visual Inspection ? Human Eye Lighting Acceptance Criteria Measurement Devices Human Eye So in order to make sure the very essential instrument (EYE) is working properly , it is essential to investigate and make sure, it works properly. So a Visual Acuity Test is recommended Yearly, by most of the standards Visual Acuity commonly referred to as clarity of Vision. It is dependent upon optical and neural factors. i.e., (i) the sharpness of the retinal focus (ii) the health and functioning of retina (iii) the sensitivity of the interpretative faculty of the brain. Vi...

ThermographyTesting – NonDestructive Testing Method

Image
 ThermographyTesting – NonDestructive Testing Method that involves visualization of heat radiations from an object and the method is a non contact inspection technique, . It is also simply called as IR – Infrared Thermography, Thermal Imaging technique or Thermography. Principle of Infrared Thermography Testing. Infrared Thermography Sensors capture Infrared radiation from any object which is above absolute zero temperature (-273.15°C), and displays on screen as -heat distribution images, any defective areas emits more heat due to more heat distribution around the defects. What is Infrared Wave? Infrared are Electromagtic Radiation similar to Light Radiation, but are not visible to human eyes , becauses of their longer wavelength, the wave length of which is longer than Red (i.e  700 nm) is called Infra Red( i.e Inferior Frequency than Red Light), Amount of Infrared Radiation captured is equal to the heat dissipated from that area, therefore ...