Here are some rarely used NDT – Few Other Methods
1. Eddy Current Testing – ET:
Eddy-current inspection uses electromagnetic induction to detect flaws in conductive materials. A circular coil carrying current is placed in proximity to the test specimen (electrically conductive). The alternating current in…
Positions for Welding Pipe
For welding pipe in shops, power plants, oil refineries, and chemical plants for crude oil, gasoline, and natural gas, the same basic welding positions described previously are used.
Flat Butt Weld Pipe Position…
Equipments and materials for NDT lab set up
1) X-Ray tube head -450 kV capacity ( only if construction of a exposure room with approval from government is possible)
2) RT Films (D4 )
3) lead screen 0.125mm, 0.25 mm
4) Film casettes
5) set of IQI -wire…
Acceptance Criteria for Liquid Penetrant Testing -LPT as per ASME , AWS and API standards
Liquid penetrant testing simply called as PT. Sometimes Dye Penetrant Testing is a surface defect detection NDT method and is more sensitive to all kind of surface defects, such as…
Non relevant Ultrasonic Indications can usually be identified as one of the following:
Interference form the transducer (search unit)
Interference form the surface of the specimen
Interference caused by mode conversion of the sound beam
Interference caused by the shape of the…
Standards for Piping Design and Inspection:
The original ASME B31 Code for
Pressure Piping was first introduced in 1935 as the single document for piping design.
In 1955, ASME began to separate the code into sections…
In Ultrasonic Testing we use something called “Ultrasonic Vibrations” we must know two facts about a vibration:
A vibration is a back and forth movement.
A vibration is energy in motion
A depression of a surface from its normal position is called a displacement.
ACOUSTIC EMISSION TESTING (AET)
Acoustic Emission Test is a type of Non – Destructive Test method generally used for detecting and locating imperfections in mechanically loaded structures or components.
Flaw origination and progression in a stressed component can be identified by acoustic emission test method.This…
Ultrasonic Testing utilizes high frequency sound waves which are not audible to human ears.
The Ultrasonic sound waves are used for measurements of thickness of any material.
General frequency used in ultrasonic thickness measurements probe is 5 Mega Hertz and above.
The probe is placed over…