ASTM E2929-13
Standard Practice for Guided Wave Testing of Above Ground Steel Piping with Magnetostrictive Transduction

Standard No.

ASTM E2929-13

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E2929-18

Latest

ASTM E2929-18(2022)

Scope

5.1 The purpose of this practice is to outline a procedure for using GWT to locate areas in metal pipes in which wall loss has occurred due to corrosion or erosion.

5.2 GWT does not provide a direct measurement of wall thickness, but is sensitive to a combination of the CSC (or reflection coefficient) and circumferential extent and axial extent of any metal loss. Based on this information, a classification of the severity can be assigned.

5.3 The GWT method provides a screening tool to quickly identify any discontinuity along the pipe. Where a possible defect is found, a follow-up inspection of suspected areas with ultrasonic testing or other NDT methods is normally required to obtain detailed thickness information, nature, and extent of damage.

5.4 GWT also provides some information on the axial length of a discontinuity, provided that the axial length is longer than roughly a quarter of the wavelength.

5.5 The identification and severity assessment of any possible defects is qualitative only. An interpretation process to differentiate between relevant and non-relevant signals is necessary.

5.6 This practice only covers the application specified in the scope. The GWT method has the capability and can be used for applications where the pipe is insulated, buried, in road crossings, and where access is limited.

5.7 GWT shall be performed by qualified and certified personnel, as specified in the contract or purchase order. Qualifications shall include training specific to the use of the equipment employed, interpretation of the test results, and guided wave technology.

5.8 A documented program which includes training, examination, and experience for the GWT personnel certification shall be maintained by the supplying party.

1.1 This practice provides a guide for the use of waves generated using magnetostrictive transduction technology for guided wave testing (GWT) welded tubulars. Magnetostrictive materials transduce or convert time varying magnetic fields into mechanical energy. As a magnetostrictive material is magnetized, it strains. Conversely, if an external force produces a strain in a magnetostrictive material, the material’s magnetic state will change. This bi-directional coupling between the magnetic and mechanical states of a magnetostrictive material provides a transduction capability that can be used for both actuation and sensing devices.

1.2 GWT utilizes ultrasonic guided waves in the 10 to approximately 250 kHz range, sent in the axial direction of the pipe, to non-destructively test pipes for discontinuities or other features by detecting changes in the cross-section or stiffness of the pipe, or both.

1.3 GWT is a screening tool. The method does not provide a direct measurement of wall thickness or the exact dimensions of discontinuities. However, an estimate of the severity of the discontinuity can be obtained.

1.4 This practice is intended for use with tubular carbon steel ......

ASTM E2929-13 Referenced Document

• ASTM E1065 Standard Guide for Evaluating Characteristics of Ultrasonic Search Units
• ASTM E1316 Standard Terminology for Nondestructive Examinations
• ASTM E1324 Standard Guide for Measuring Some Electronic Characteristics of Ultrasonic Testing Instruments
• ASTM E2775 Standard Practice for Guided Wave Testing of Above Ground Steel Pipework Using Piezoelectric Effect Transduction
• ASTM E543 Standard Practice for Agencies Performing Nondestructive Testing
• IEEE SI 10 American National Standard for Metric Practice

ASTM E2929-13 history

• 2022 ASTM E2929-18(2022) Standard Practice for Guided Wave Testing of Above Ground Steel Piping with Magnetostrictive Transduction
• 2018 ASTM E2929-18 Standard Practice for Guided Wave Testing of Above Ground Steel Piping with Magnetostrictive Transduction
• 2013 ASTM E2929-13 Standard Practice for Guided Wave Testing of Above Ground Steel Piping with Magnetostrictive Transduction