ASTM E243-24 PDF

Full title and description

ASTM E243-24 — Standard Practice for Electromagnetic (Eddy Current) Examination of Copper and Copper-Alloy Tubes. This practice defines recommended procedures, equipment use, and examination techniques for eddy‑current (electromagnetic) inspection of copper and copper‑alloy tubing to detect discontinuities that could cause tube failure.

Abstract

ASTM E243-24 provides a concise, practice‑level procedure for performing encircling (annular) coil eddy‑current examinations of copper and copper‑alloy tubes. It covers typical tube size ranges, general test method principles, practical limitations (such as end effects and sensitivity to deep‑seated defects), and guidance for application and interpretation of indications. The practice is intended for manufacturers, inspection agencies, and in‑plant quality control where nondestructive screening of tubes is required.

General information

• Status: Current / active standard.
• Publication date: June 1, 2024.
• Publisher: ASTM International.
• ICS / categories: 23.040.15 (Non‑ferrous metal pipes / tubing).
• Edition / version: E243‑24 (2024).
• Number of pages: 6 pages.

Scope

This practice covers procedures to be followed in eddy‑current examination of copper and copper‑alloy tubes for detecting discontinuities of a severity likely to cause tube failure. It is written for examinations using encircling (annular) coil systems and applies to tubes with outside diameters up to 3-1/8 in (79.4 mm) inclusive and wall thicknesses from 0.017 in (0.432 mm) to 0.120 in (3.04 mm) inclusive, unless otherwise specified by product requirements or by agreement between purchaser and manufacturer. The practice may be adapted for other sizes or for internal probe examinations by contractual agreement and with recognition of technical differences (for example, see guidance on in‑situ/internal probe examinations in related practices).

Key topics and requirements

• Recommended use of encircling/annular coil eddy‑current systems for copper and copper‑alloy tubes.
• Applicable tube geometry limits (OD and wall‑thickness ranges) and the option to extend by agreement.
• Detection goals: identification of discontinuities likely to cause tube failure (surface and near‑surface, and reduced sensitivity for deep‑seated defects).
• Practical limitations such as end effects, masking by irrelevant indications, and influence of surface condition and supports.
• Calibration and reference standards practice for setting reject/accept levels and distinguishing relevant vs. irrelevant signals.
• Guidance for reporting, re‑examination, and use of supplemental methods when necessary.

Typical use and users

Used by nondestructive testing (NDT) technicians, inspection laboratories, tube manufacturers, heat‑exchanger fabricators, quality managers, procurement/specification engineers, and maintenance teams performing acceptance testing or in‑process inspection of copper and copper‑alloy tubing. Typical applications include HVAC/refrigeration tubing, condenser and heat‑exchanger tubing, plumbing products, and other industrial tubing where conductive, nonferrous materials are examined for manufacturing or in‑service integrity.

Related standards

Commonly referenced or complementary ASTM documents include: ASTM E690 (practice for in‑situ/internal probe eddy‑current examination of nonmagnetic heat‑exchanger tubes), ASTM E1316 (standard terminology for nondestructive examinations), and various ASTM product or test‑method standards for tube materials and acceptance criteria. Earlier editions of this practice (for example E243‑13, E243‑09) provide historical context and may be listed in product histories.

Keywords

eddy current, electromagnetic testing, ECT, copper tubing, copper‑alloy tubes, nondestructive testing (NDT), encircling coil, annular coil, tube inspection, heat‑exchanger tubing, discontinuity detection, calibration, end effect.

FAQ

Q: What is this standard?

A: ASTM E243‑24 is a practice that provides procedures and guidance for performing electromagnetic (eddy‑current) examinations of copper and copper‑alloy tubes to detect discontinuities that could lead to failure.

Q: What does it cover?

A: It covers recommended eddy‑current techniques (primarily encircling/annular coil systems), applicable tube size and wall‑thickness ranges, practical limitations (e.g., end effects), calibration and interpretation guidance, and general application considerations for quality control and acceptance.

Q: Who typically uses it?

A: NDT technicians, inspection bodies, tube manufacturers, maintenance engineers, and specifiers of tubing and heat‑exchanger components use this practice for production inspection and in‑service condition assessment.

Q: Is it current or superseded?

A: The designation E243‑24 indicates the 2024 edition; this entry is the current published version (published June 1, 2024) and supersedes earlier editions.

Q: Is it part of a series?

A: It is part of ASTM's E07 committee portfolio on nondestructive testing practices. Related practices and guides in the same subject area include E690 (in‑situ/internal probe eddy‑current examinations) and ASTM terminology and method standards that support eddy‑current testing.

Q: What are the key keywords?

A: Key terms are: eddy current, electromagnetic testing, copper tubing, copper‑alloy tubes, encircling coil, nondestructive testing, tube inspection, discontinuity detection.