ASTM E2907/E2907M-13 (2019) PDF

Full title and description

Standard Practice for Examination of Paper Machine Rolls Using Acoustic Emission from Crack Face Rubbing — designation E2907/E2907M−13, reapproved in 2019. The practice gives procedural guidance for performing acoustic emission (AE) examinations on non-pressure paper machine rolls where frictional contact at crack faces during slow rotation produces detectable AE.

Abstract

This practice describes how to use acoustic emission generated by crack-face rubbing during slow rotation of paper machine rolls to detect and locate cracks and other discontinuities. It defines test conditions (slow rotation and loading from the roll weight or journal supports), measurement objectives (detection and/or location of AE sources), limitations (AE indicates source activity but other NDT methods are required to size/characterize flaws), unit systems (SI and inch-pound treated separately), and safety considerations. Current edition approved May 1, 2019 (designation shows original year 2013 with reapproval in 2019).

General information

• Status: Published — designation E2907/E2907M−13 (reapproved 2019). Some vendor/catalog records list earlier 2013 edition as replaced; the active/reapproved text is dated 2019.
• Publication date: Approved 01 May 2019; published June 2019 (designation shows original 2013 adoption with 2019 reapproval).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 17.140.20 (Noise emitted by machines and equipment); 85.100 (Equipment for the paper industry).
• Edition / version: E2907/E2907M−13 (Reapproved 2019) — originally approved 2013, reapproved in 2019.
• Number of pages: 7 pages.

Scope

This practice provides guidelines for AE examinations of non-pressure paper machine rolls using crack-face rubbing emissions produced during slow rotation. It is intended to detect or locate emission sources (cracks and discontinuities) that produce frictional AE; it does not prescribe follow-up sizing or fitness-for-service evaluation — other NDT methods (magnetic particle, ultrasonic, radiography, etc.) are recommended to characterize detected flaws. Both SI and inch‑pound units are provided but treated independently.

Key topics and requirements

• Acoustic emission technique focused on crack-face rubbing emissions.
• Test arrangement: slow roll rotation to create a full load cycle with load from roll weight or journal support.
• Detection and/or location of AE sources; AE indicates activity but does not alone size flaws.
• Requirement to use other NDT methods to evaluate significance and exact position/dimensions of flaws (examples: magnetic particle, shear-wave ultrasonic, radiography).
• Separate treatment of SI and inch‑pound units — do not mix values from both systems.
• Safety and precautionary statements referenced in the standard; user responsibility to establish safety, health, and environmental practices.

Typical use and users

This practice is used by nondestructive testing (NDT) engineers and technicians, maintenance and reliability teams in the paper and pulp industry, roll manufacturers, and inspection service providers to screen paper machine rolls for crack activity and to locate potential defects requiring further evaluation. It is typically applied during planned maintenance outages, roll inspections, or whenever suspicious performance/noise suggests possible roll cracking.

Related standards

Commonly referenced/related standards include ASTM E1316 (Standard Terminology for Nondestructive Examinations) for terminology and ASTM E2598 (AE examination of cast iron Yankee and steam heated paper dryers) which addresses AE techniques for other paper‑industry roll/dryer equipment; this practice is maintained under ASTM Committee E07, Subcommittee E07.04 (Acoustic Emission).

Keywords

acoustic emission; AE; crack-face rubbing; paper machine rolls; nondestructive testing; NDT; roll inspection; crack detection; roll maintenance; inspection practice.

FAQ

Q: What is this standard?

A: It is an ASTM standard practice (E2907/E2907M−13, reapproved 2019) that provides guidance for performing acoustic emission examinations of non‑pressure paper machine rolls using crack‑face rubbing emissions.

Q: What does it cover?

A: The standard covers procedures for inducing and measuring AE from crack‑face rubbing during slow rotation of paper machine rolls, objectives for detection and localization of AE sources, limitations of AE as a sole sizing method, unit conventions (SI and inch‑pound), and safety considerations. Follow‑up NDT methods are recommended to characterize detected flaws.

Q: Who typically uses it?

A: NDT practitioners, maintenance/reliability engineers in the paper and pulp industry, roll manufacturers, and third‑party inspection services. It is used during inspections, outages, and condition monitoring activities.

Q: Is it current or superseded?

A: The designation indicates original approval in 2013 and reapproval in 2019 (E2907/E2907M−13, reapproved 2019). Different catalogs may show older 2013 metadata replaced by the 2019 reapproval; users should confirm the edition they obtain from ASTM to ensure they have the reapproved 2019 text.

Q: Is it part of a series?

A: It is part of ASTM Committee E07 (Nondestructive Testing) work, specifically Subcommittee E07.04 on the Acoustic Emission Method, and is related to other AE and paper‑industry NDT practices (for example ASTM E2598). Terminology references are made to ASTM E1316.

Q: What are the key keywords?

A: Acoustic emission; crack-face rubbing; paper machine rolls; NDT; AE examination; crack detection; roll inspection.