WTE Power Testing NDT UT Ultrasonic test

NDT UT Ultrasonic test

Key Standards for Ultrasonic Testing (UT) of Steel

StandardTitleApplication
ISO 16810Non-destructive testing — Ultrasonic testing — General principlesGeneral guideline for UT of metallic materials
ISO 16811Ultrasonic testing — Sensitivity and range settingDefines reference blocks, calibration, and evaluation criteria
ISO 17640Ultrasonic testing of weldsUT applied to welded joints (commonly used in construction, pipelines)
EN ISO 10893-10Non-destructive testing of steel tubes — Part 10: UT of longitudinal and/or transverse imperfections in seamless and welded steel tubesWidely used in pipe manufacturing
EN 10160Ultrasonic testing of steel flat products for the detection of laminar imperfectionsFor plate and flat steel products (commonly used in heavy industries)

ASTM and ASME Standards (USA)

StandardTitleNotes
ASTM E114Standard Practice for UT of Wrought ProductsGeneral UT practice for wrought metal products
ASTM A435Standard Specification for Straight-Beam UT of Steel PlatesBasic level UT of steel plates
ASTM A578 / A578MStandard Specification for UT of Flat-Rolled Carbon and Alloy Steel PlatesMost commonly used in structural and pressure applications
ASTM A388 / A388MStandard Practice for UT of Steel ForgingsUsed in inspection of heavy forgings
ASME Section V, Article 4UT Method for Welds and MaterialsEssential UT code for materials used in pressure vessels and boilers

Test Parameters Typically Specified

  • Type of probe: Straight beam, angle beam (e.g. 45°, 60°, 70°)
  • Frequency: Typically 2–5 MHz (depending on thickness/material)
  • Acceptance criteria: Depends on standard and severity level (e.g., EN class S0, S1, S2; ASTM Level A/B/C)
  • Calibration: Performed with reference blocks or DSC (Distance/Sensitivity Calibration blocks)

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