DMTA-10084-01EN, Rev. 2, November 2018
Software Features and Options
181
α
=
∆
Vs
/ 2d * 1000 [dB/m]
11.5 AWS D1.1/D1.5 Weld Rating Software
The AWS D1.1 software feature for the EPOCH 6LT has been created to assist you in
performing inspections covered under the American Welding Society D1.1 (or D1.5)
Structural Welding code for steel. This code provides inspectors with a method to
classify discontinuities found in welds using ultrasonic inspection. This code uses the
following formula to develop an indication rating for a reflector found during an
inspection:
A
−
B
−
C = D
where:
A = Discontinuity indication level (dB)
B = Reference indication level (dB)
C = A
tt
enuation factor: 2 * (sound path
−
25.4 mm) (dB)
D = Indication rating (dB)
The AWS D1.1 inspector must take the indication rating (D) that is calculated based
on A, B, and C to an “Ultrasonic Acceptance — Rejection Criteria” table produced by
the AWS in order to classify the severity of the discontinuity that has been located. As
an inspection is performed, you are required to develop an AWS report that lists the
values for all variables listed above as well as transducer information, discontinuity
length and location, and your overall evaluation of the discontinuity.
For further details regarding the test equipment, methods, interpretation, and
classification requirements for these inspections, refer to the AWS D1.1 Code Book.
The goal of the AWS D1.1 software feature is to simplify inspector tasks and lower the
overall inspection time. The EPOCH 6LT does this by automatically performing
required calculations. It also enables the inspector to document discontinuities in the
data logger for reporting purposes.
The EPOCH 6LT can transfer inspection data to your PC through the GageView Pro
software to aid in report generation. GageView Pro enables you to view the
instrument’s setup parameters, the waveform generated by a discontinuity, the sound
path and location information of the discontinuity, and all values for the AWS D1.1
formula variables.
Summary of Contents for EPOCH 6LT
Page 8: ...DMTA 10084 01EN Rev 2 November 2018 Table of Contents viii...
Page 10: ...DMTA 10084 01EN Rev 2 November 2018 List of Abbreviations x...
Page 16: ...DMTA 10084 01EN Rev 2 November 2018 Introduction 6...
Page 20: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 1 10...
Page 26: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 2 16...
Page 32: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 3 22...
Page 68: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 5 58 Figure 5 15 Diagnostic Test setup page...
Page 110: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 8 100...
Page 154: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 9 144...
Page 216: ...DMTA 10084 01EN Rev 2 November 2018 Chapter 11 206 Figure 11 45 Corrosion sidebar menu G2Start...
Page 220: ...DMTA 10084 01EN Rev 2 November 2018 Appendix 210...
Page 226: ...DMTA 10084 01EN Rev 2 November 2018 List of Tables 216...
Page 232: ...DMTA 10084 01EN Rev 2 November 2018 Index 222...
