ISO 16823:2025: NON-DESTRUCTIVE TESTING — ULTRASONIC
TESTING — THROUGH-TRANSMISSION TECHNIQUE
The recently updated ISO 16823:2025
standard establishes a pivotal framework
for applying the through-transmission ultra-
sonic testing (TTUT) technique, marking a
significant advancement in nondestructive
testing (NDT). Designed to ensure the
integrity and quality of industrial compo-
nents, this standard offers precise meth-
odologies for detecting imperfections and
evaluating attenuation in materials under
test, even in challenging conditions.
Unlike conventional ultrasonic tech-
niques, TTUT employs a unique config-
uration where ultrasonic waves pass
through the material and are received
by a second probe or reflect back to the
same probe. By analyzing the transmitted
signal’s amplitude and timing, TTUT
effectively identifies discontinuities such
as laminations and internal defects. This
capability makes it an indispensable tool
for inspecting components with complex
geometries, high-attenuation materials,
and thin products like plates and sheets.
ISO 16823:2025 underscores the
adaptability of TTUT for various industrial
applications, including the detection of
imperfections in materials where traditional
methods may struggle due to unfavorable
defect orientation or high material attenu-
ation. The standard also enables precision
in assessing material thickness and atten-
uation coefficients, crucial for applications
demanding stringent quality assurance.
The updated standard highlights config-
urations for one- or two-probe setups,
enabling its application in both continuous
and pulsed wave modes. Its versatility
extends to coupling methods such as
immersion, squirters, and wheel probes,
ensuring robust performance across diverse
testing scenarios. Additionally, the standard’s
recommendations ensure optimal probe
positioning and sensitivity, enhancing reli-
ability in detecting critical defects.
ISO 16823:2025 reaffirms its role as
a benchmark for NDT professionals,
fostering confidence in the structural
integrity of critical components in indus-
tries like aerospace, automotive, and
power generation. By refining the princi-
ples and practices of TTUT, the standard
continues to drive innovation and excel-
lence in NDT, aligning with global efforts
to enhance safety and efficiency in engi-
neering and manufacturing.
STANDARDS EDITOR
Hossein Taheri, PhD: Georgia Southern
University, Statesboro, GA htaheri
@georgiasouthern.edu
SCANNER
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STANDARDSUPDATE
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20
M A T E R I A L S E V A L U A T I O N • F E B R U A R Y 2 0 2 5
2502 ME Feb.indd 20 1/23/25 1:21 PM
TESTING — THROUGH-TRANSMISSION TECHNIQUE
The recently updated ISO 16823:2025
standard establishes a pivotal framework
for applying the through-transmission ultra-
sonic testing (TTUT) technique, marking a
significant advancement in nondestructive
testing (NDT). Designed to ensure the
integrity and quality of industrial compo-
nents, this standard offers precise meth-
odologies for detecting imperfections and
evaluating attenuation in materials under
test, even in challenging conditions.
Unlike conventional ultrasonic tech-
niques, TTUT employs a unique config-
uration where ultrasonic waves pass
through the material and are received
by a second probe or reflect back to the
same probe. By analyzing the transmitted
signal’s amplitude and timing, TTUT
effectively identifies discontinuities such
as laminations and internal defects. This
capability makes it an indispensable tool
for inspecting components with complex
geometries, high-attenuation materials,
and thin products like plates and sheets.
ISO 16823:2025 underscores the
adaptability of TTUT for various industrial
applications, including the detection of
imperfections in materials where traditional
methods may struggle due to unfavorable
defect orientation or high material attenu-
ation. The standard also enables precision
in assessing material thickness and atten-
uation coefficients, crucial for applications
demanding stringent quality assurance.
The updated standard highlights config-
urations for one- or two-probe setups,
enabling its application in both continuous
and pulsed wave modes. Its versatility
extends to coupling methods such as
immersion, squirters, and wheel probes,
ensuring robust performance across diverse
testing scenarios. Additionally, the standard’s
recommendations ensure optimal probe
positioning and sensitivity, enhancing reli-
ability in detecting critical defects.
ISO 16823:2025 reaffirms its role as
a benchmark for NDT professionals,
fostering confidence in the structural
integrity of critical components in indus-
tries like aerospace, automotive, and
power generation. By refining the princi-
ples and practices of TTUT, the standard
continues to drive innovation and excel-
lence in NDT, aligning with global efforts
to enhance safety and efficiency in engi-
neering and manufacturing.
STANDARDS EDITOR
Hossein Taheri, PhD: Georgia Southern
University, Statesboro, GA htaheri
@georgiasouthern.edu
SCANNER
|
STANDARDSUPDATE
SHOWCASE
YOUR EXPERTISE
Validate your knowledge and skills and
achieve industry recognition. Schedule
your Industry Sector Qualification –
Oil &Gas (ISQ–O&G) exam TODAY.
Visit asntcertification.org for exam dates
and Authorized Exam Center (AEC) locations
20
M A T E R I A L S E V A L U A T I O N • F E B R U A R Y 2 0 2 5
2502 ME Feb.indd 20 1/23/25 1:21 PM
