ASTM E213

Covers — ultrasonic testing of metal pipe and tubing for longitudinal and transverse discontinuities using contact or immersion techniques and reference standards for calibration; a volumetric method with wall-thickness capability.

Does NOT cover (exclusions) — the following are governed elsewhere:

• Surface-only flaws → PT (E165) / MT (E709).
• Radiographic (film) volumetric examination → RT (E94).
• Weld UT procedures/advanced UT (PAUT/TOFD) for code work → ASME Section V articles.
• Acceptance criteria → the construction code (via ASME Section V).

UT gives volumetric coverage from one side without radiation, but relies on operator skill and calibration.

E213 sets minimum requirements for ultrasonic examination:

• Technique — contact or immersion, angle/straight beam, and coupling appropriate to the pipe/tube.
• Calibration — reference standards (notches) to set sensitivity and reject level.
• Scanning — coverage and speed to detect the specified discontinuity orientations.
• Evaluation — indication assessment and documentation; personnel certified per the referencing program.

ASTM E213 is the practice for ultrasonic testing (UT) of metal pipe and tubing. High-frequency sound is introduced into the material and reflections from discontinuities are analyzed — a volumetric method that also measures wall thickness, needs access from only one side, and uses no radiation.

UT is especially good at detecting planar flaws such as lack of fusion and cracks that radiography can miss. It depends on operator skill and careful calibration against reference notches; advanced techniques (phased array, TOFD) extend it under Section V. Acceptance comes from the construction code.

Engineering Note: UT reliability hinges on calibration and operator qualification — verify the reference-standard notches and the technician's certification before trusting a UT report over an RT.