SIST EN ISO 32679:2026 PDF
Non-destructive testing - Radiographic testing - Determination of the size of industrial radiographic gamma sources (ISO 32679:2024)
Non-destructive testing - Radiographic testing - Determination of the size of industrial radiographic gamma sources (ISO 32679:2024)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 14
- Дата публикации:
- 4 декабря 2025 г.
- Издание:
- ISO 32679:2024
- ICS:
- 19.100
This document specifies a test procedure for determination of the size of industrial radiographic gamma sources of 0,5 mm or greater, made from the radionuclides Iridium 192, Ytterbium 169, Selenium 75 or Cobalt 60, by a radiography method with X-rays. The source size of a gamma radiation source is an important factor which affects the image quality of gamma ray images. The source size is determined with an accuracy of ±10 % but typically not better than ±0,1 mm. The source size is provided by the manufacturer as the mechanical dimension of the source insert. A measurement can be required if the manufacturing process is validated or monitored after implementation of the source into the holder. This document can be used for other radionuclides after validation. The standard test method ASTM E1114 provides further information on the measurement of the Ir-192 source size, the characterization of the source shape, and its correct assembly and packaging.
Abstract
Overview
EN ISO 32679:2025 (identical to ISO 32679:2024) is a CEN/ISO standard for non‑destructive testing (NDT) by radiographic methods to determine the physical size of industrial gamma radiography sources. It defines a radiography procedure using X‑rays to measure source sizes ≥ 0.5 mm for radionuclides Ir‑192, Yb‑169, Se‑75 and Co‑60. The measured source size (d) is used to assess image quality and to validate or monitor manufacturing and installation of source inserts. Measurement accuracy is ±10 % (typically not better than ±0.1 mm). The method can be validated for other radionuclides.
Key topics and technical requirements
- Test geometry and alignment
- Place X‑ray tube, gamma source and detector on a common axis.
- Gamma‑source-to‑detector distance b should be 10–20 % of the total X‑ray‑source-to‑detector distance (a + b).
- Geometrical magnification factor ν = (a + b) / a; measured projection d′ is corrected by 1/ν to obtain d.
- Minimum focus‑detector distance of 700 mm for focal spots
Технические детали
- Технический комитет
- PKG - Testing of metallic materials
- SKU
- SIST EN ISO 32679:2026
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