Non Destructive Test

Name: Muhammad Fakhar Hayat. (L1F13BSME0049) Abdullah Mansoor. (L1F13BSME00)

Section: F13Course Name: Fluid Mechanics

Introduction

 It is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage.

Why NDT?

 NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research.

Methods of NDTVisual

Liquid Penetrant

Magnetic Particle

Eddy Current

Ultrasonic

X-ray

Microwave

Acoustic Emission

Thermography

Laser Interferometry

Replication

Flux Leakage

Acoustic Microscopy

Magnetic Measurements

Tap Testing

Common methods use in NDT• Visual• Liquid Penetrant • Magnetic • Ultrasonic• Eddy Current• X-ray

Liquid Penetrant

liquid penetrant inspection (LPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics)ceramics).

Visual inspection is

the final step in the process. Inspection is

done under UV light to

increase test sensitivity.

The excess liquid is

removed from the surface of

the part.

Liquid is applied on

surface breaking

crack

Visual Inspection

Most basic and common inspection method

A visual inspection or visual examination of objects, parts or components is the oldest and reliable non-destructive testing method.

 Portable video inspection unit

with zoom allows inspection of

large tanks and vessels, railroad tank cars, sewer

lines.

Robotic crawlers permit

observation in hazardous or tight areas, such as air

3D Visual Inspection Microscope

Magnetic

 The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization

These particles are attracted to magnetic flux leakage fields and will cluster to form an indication directly over the discontinuity. This indication can be visually detected under proper lighting conditions

Ultrasonic

High frequency sound waves are introduced into a material and they are reflected back from surfaces or flaws.

0 2 4 6 8 10

initial pulse

crack

High resolution images can be produced by

plotting signal strength or time-of-

flight using a computer-controlled

scanning system

X Ray or Radiography

Radiography (X-ray) uses X-rays and gamma-rays to produce a radiograph of a specimen, showing any changes in thickness, defects (internal and external), and assembly details to ensure optimum quality in your operation.

Eddy Current

Eddy current testing is particularly well suited for detecting surface cracks but can also be used to make electrical conductivity and coating thickness measurements