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Ultrasonic Testing Cheat Sheet

This document provides a summary of key formulas and concepts used in ultrasonic testing. It lists symbols commonly used in ultrasonic testing and their meanings. Formulas are provided for calculating wavelength, near field distance, beam spread, Snell's law, decibel conversion, acoustic impedance, reflected energy, velocity, skip distance, period, and other important ultrasonic concepts. Standard SI units and prefixes are also defined.

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196 views2 pages

Ultrasonic Testing Cheat Sheet

This document provides a summary of key formulas and concepts used in ultrasonic testing. It lists symbols commonly used in ultrasonic testing and their meanings. Formulas are provided for calculating wavelength, near field distance, beam spread, Snell's law, decibel conversion, acoustic impedance, reflected energy, velocity, skip distance, period, and other important ultrasonic concepts. Standard SI units and prefixes are also defined.

Uploaded by

fioraniribeiro
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Ultrasonic Testing Formula Sheet

General UT Equations Symbols Ultrasonic Pneumonic Aid SI Units

Wavelength =V/F F Frequency F Frequency Mega 106 1000000

Near Field = (D2 x F) / (4 x V) λ Wavelength Kilo 103 1000


P Penetration
Half Angle Beam Spread = (K x V) / (D x F) D Diameter Centi 101 10

Snell’s Law (Sin⍬1 / Sin⍬2) = (V1 / V2) θ Angle A Attenuation 1 1 1

Amplitude to dB dB = 20 x Log(A2 / A1) dB Decibels milli 10-3 0.001


D Divergence
Acoustic Impedance (Z) =⍴xV A Amplitude
Beam Spread
Impedance Ratio = Z 2 / Z1 S Sensitivity Constants
⍴ Density

Reflected Energy (%) = [(Z2 - Z1)2 / (Z2 + Z1)2] x 100 V Velocity K dB


C Crystal Thickness
V - Path = (2 x w.t.) / Cos(⍬) Z Impedance 1.22 0
R Resolution
Skip Distance = 2 x w.t. x Tan(⍬) w.t. Wall Thickness 1.09 -20

Period =1/F a, b, c Side lengths of triangle Y Wavelength 0.93 -12

Pulse Interval = 1 / Pulse Repetition Rate 0.87 -10


N Near Field Distance
Circumference of Circle = ∏ x Diameter 0.7 -6

Pythagorean Theorem a2 + b2 = c2 0.51 -3

Distance V x Time

Inches to Millimeters Multiply times 25.4

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Ultrasonic Testing Formula Sheet

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