ASTM E215-22 PDF

Full title and description

ASTM E215-22 — Standard Practice for Standardizing Equipment and Electromagnetic Examination of Seamless Aluminum‑Alloy Tube. This practice describes procedures for standardizing eddy‑current equipment and the use of artificial reference discontinuities (flat‑bottomed or through‑holes) for the electromagnetic examination of seamless aluminum‑alloy tubing.

Abstract

This practice provides requirements and guidance for calibrating and standardizing eddy‑current inspection systems used to examine seamless aluminum‑alloy tube. Topics include fabrication and use of reference standards, equipment settings and probe positioning, frequency selection and the concept of standard depth of penetration (SDP) and effective depth of penetration (EDP), limitations of eddy‑current methods for tube wall thickness, and general procedural considerations. The practice does not prescribe acceptance criteria; those are to be specified by the using parties.

General information

• Status: Published / Active.
• Publication date: Approved June 1, 2022; published July 2022 (Designation E215-22).
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 77.040.20 — Non‑destructive testing of metals.
• Edition / version: E215-22 (2022 revision).
• Number of pages: 11 pages.

Scope

This practice covers the standardization of eddy‑current equipment employed in the electromagnetic examination of seamless aluminum‑alloy tube. It is intended for tubular products having nominal diameters up to 4 in. (101.6 mm) and wall thicknesses up to the standard depth of penetration (SDP) for the alloy and frequency used; larger diameters or thicker walls may be examined up to the effective depth of penetration (EDP) where adequate resolution is obtained and as agreed by the using parties. Procedures for fabrication of reference standards and general eddy‑current examination requirements are included. The practice does not establish acceptance criteria.

Key topics and requirements

• Principle of eddy‑current examination and influence of conductivity and frequency on penetration (SDP and EDP).
• Use of artificial reference discontinuities (flat‑bottomed and through holes) to standardize equipment and calibrate sensitivity.
• Procedures for fabrication and use of reference standards (see annexes X1.1 and X2.1 in the practice).
• Equipment setup, probe positioning, lift‑off control, and multi‑frequency inspection considerations.
• Limits of detection related to wall thickness, alloy conductivity, and excitation frequency; guidance for selecting frequencies to match SDP.
• Requirements to document procedures, calibration settings, inspection records, and any deviations agreed by the using parties.
• Safety, units (inch‑pound primary; SI conversions provided for information), and responsibility for establishing acceptance criteria by the user.

Typical use and users

Used by nondestructive testing (NDT) technicians and inspectors, quality engineers, tube manufacturers, heat‑treat and materials laboratories, and procurement/quality personnel in industries that use seamless aluminum‑alloy tubing (aerospace, automotive, defense, heat‑exchanger and general manufacturing). The practice is applied when establishing calibration procedures, producing reference standards, qualifying inspection systems, or writing inspection instructions where eddy‑current methods are specified for aluminum tube.

Related standards

Commonly referenced and related documents include ASTM E1316 (Terminology for Nondestructive Examinations), ASTM E543 (Specification for Agencies Performing Nondestructive Testing), ASTM E1004 (Determining Electrical Conductivity by Eddy Current), ASME practice SE‑215 (for Boiler & Pressure Vessel Code applications), and industry guidance on personnel qualification such as SNT‑TC‑1A, ANSI/ASNT‑CP‑189, NAS‑410 and ISO 9712. Other ASTM electromagnetic tubular product practices (e.g., E243, E309, and related E‑series documents) may be relevant depending on material and application.

Keywords

eddy current, electromagnetic examination, aluminum alloy, seamless tube, nondestructive testing (NDT), standard depth of penetration (SDP), effective depth of penetration (EDP), reference standard, calibration, probe, conductivity.

FAQ

Q: What is this standard?

A: ASTM E215-22 is a standard practice that provides procedures for standardizing and calibrating eddy‑current equipment used to inspect seamless aluminum‑alloy tubing.

Q: What does it cover?

A: It covers use of artificial reference discontinuities, fabrication of reference standards, equipment settings and calibration, probe positioning, frequency selection relative to SDP/EDP, inspection limitations for tube diameters and wall thicknesses, and general procedural recommendations. It does not set acceptance criteria.

Q: Who typically uses it?

A: NDT technicians and inspectors, tube manufacturers, materials and metallurgical laboratories, quality and assurance engineers, and specification writers in sectors that rely on aluminum tubing (e.g., aerospace, automotive, heat‑exchanger manufacturing, and defense).

Q: Is it current or superseded?

A: E215-22 is the 2022 revision of the practice (designated E215‑22). It replaced the prior edition (E215‑16) and was approved in 2022; users should confirm they are using this latest edition for procurement and inspection documentation.

Q: Is it part of a series?

A: It is part of ASTM's body of nondestructive testing standards (Committee E07) and sits alongside other electromagnetic/eddy‑current practices for tubular products and related guides; it is often used in conjunction with terminology and qualification standards (E1316, E543, E1004) and industry qualification schemes.

Q: What are the key keywords?

A: Eddy current, aluminum alloy, seamless tube, SDP, EDP, calibration, reference standard, nondestructive testing.