NF EN ISO 17636-2

NF EN ISO 17636-2

March 2013
Standard Cancelled

Non-destructive testing of welds - Radiographic testing - Part 2 : X- and gamma-ray techniques with digital detectors

ISO 17636-2:2013 specifies fundamental techniques of digital radiography with the object of enabling satisfactory and repeatable results to be obtained economically. The techniques are based on generally recognized practice and fundamental theory of the subject.ISO 17636-2:2013 applies to the digital radiographic examination of fusion welded joints in metallic materials. It applies to the joints of plates and pipes. Besides its conventional meaning, "pipe", as used in this International Standard, covers other cylindrical bodies such as tubes, penstocks, boiler drums, and pressure vessels.ISO 17636-2:2013 specifies the requirements for digital radiographic X- and gamma-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDA) of the welded joints of metallic plates and tubes for the detection of imperfections. Digital detectors provide a digital grey value (GV) image which can be viewed and evaluated using a computer. ISO 17636-2:2013 specifies the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important, but are not the main focus of ISO 17636-2:2013. The procedure specified in ISO 17636-2:2013 provides the minimum requirements for radiographic practice which permit exposure and acquisition of digital radiographs with equivalent sensitivity for detection of imperfections as film radiography, as specified in ISO 17636-1.ISO 17636-2:2013 does not specify acceptance levels for any of the indications found on the digital radiographs.If contracting parties apply lower test criteria, it is possible that the quality achieved is significantly lower than when ISO 17636-2:2013 is strictly applied.

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Collections

National standards and national normative documents

Publication date

March 2013

Number of pages

65 p.

Reference

NF EN ISO 17636-2

ICS Codes

25.160.40   Welded joints and welds
77.040.20   Non-destructive testing of metals

Classification index

A89-510-2

Print number

1 - 28/02/2013

International kinship

ISO 17636-2:2013

European kinship

EN ISO 17636-2:2013
Sumary
Non-destructive testing of welds - Radiographic testing - Part 2 : X- and gamma-ray techniques with digital detectors

ISO 17636-2:2013 specifies fundamental techniques of digital radiography with the object of enabling satisfactory and repeatable results to be obtained economically. The techniques are based on generally recognized practice and fundamental theory of the subject.

ISO 17636-2:2013 applies to the digital radiographic examination of fusion welded joints in metallic materials. It applies to the joints of plates and pipes. Besides its conventional meaning, "pipe", as used in this International Standard, covers other cylindrical bodies such as tubes, penstocks, boiler drums, and pressure vessels.

ISO 17636-2:2013 specifies the requirements for digital radiographic X- and gamma-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDA) of the welded joints of metallic plates and tubes for the detection of imperfections.

Digital detectors provide a digital grey value (GV) image which can be viewed and evaluated using a computer. ISO 17636-2:2013 specifies the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important, but are not the main focus of ISO 17636-2:2013. The procedure specified in ISO 17636-2:2013 provides the minimum requirements for radiographic practice which permit exposure and acquisition of digital radiographs with equivalent sensitivity for detection of imperfections as film radiography, as specified in ISO 17636-1.

ISO 17636-2:2013 does not specify acceptance levels for any of the indications found on the digital radiographs.

If contracting parties apply lower test criteria, it is possible that the quality achieved is significantly lower than when ISO 17636-2:2013 is strictly applied.

Replaced standards (3)
NF EN 1435
October 1997
Standard Cancelled
Non-destructive examination of welds. Radiographic examination of welded joints.

Le présent document spécifie les techniques fondamentales du contrôle par radiographie des assemblages soudés par fusion des matériaux métalliques.

NF EN 1435/A1
June 2003
Standard Cancelled
Non-destructive examination of welds - Radiographic examination of welded joints

Le présent amendement a pour but principal d'ajouter l'annexe ZA relative aux directives UE 97/23/CE et 87/404/CEE.

NF EN 1435/A2
July 2004
Standard Cancelled
Non-destructive testing of welds - Radiographic testing of welded joints

Le présent document spécifie les techniques fondamentales du contrôle par radiographie des assemblages soudés par fusion des matériaux métalliques.

Standard replaced by (1)
NF EN ISO 17636-2
October 2022
Standard Current
Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors

This document specifies techniques of digital radiography with the object of enabling satisfactory and repeatable results. The techniques are based on generally recognized practice and fundamental theory of the subject. This document applies to the digital radiographic testing of fusion welded joints in metallic materials. It applies to the joints of plates and pipes. Besides its conventional meaning, “pipe”, as used in this document, covers other cylindrical bodies such as tubes, penstocks, boiler drums and pressure vessels. This document specifies the requirements for digital radiographic X- and gamma-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDAs) of the welded joints of metallic plates and tubes for the detection of imperfections. It includes manual and automated inspection with DDAs. Digital detectors provide a digital grey value image which can be viewed and evaluated using a computer (Annex E). This document specifies the recommended procedure for detector selection and radiographic practice. Selection of computer, software, monitor, printer and viewing conditions are important, but are not the main focus of this document. The procedure specified in this document provides the minimum requirements for radiographic practice which permits exposure and acquisition of digital radiographs with equivalent sensitivity for the detection of imperfections as film radiography (specified in ISO 17636-1). This document does not specify acceptance levels for any of the indications found on the digital radiographs. ISO 10675 provides information on acceptance levels for weld inspection. If contracting parties apply lower test criteria, it is possible that the quality achieved will be significantly lower than when this document is strictly applied.

Table of contents
  • Avant-propos
    iv
  • Introduction
    vi
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Symboles et termes
    5
  • 5 Classification des techniques radiographiques
    6
  • 6 Généralités
    7
  • 6.1 Protection contre les rayonnements ionisants
    8
  • 6.2 Préparation de la surface et stade de fabrication
    8
  • 6.3 Position de la soudure sur le radiogramme
    8
  • 6.4 Identification des radiogrammes
    8
  • 6.5 Marquage
    8
  • 6.6 Recouvrement des images numériques
    8
  • 6.7 Types et positions des indicateur de qualité d'image (IQI)
    8
  • 6.8 Indices de qualité d'image minimums
    10
  • 6.9 Qualification du personnel
    10
  • 7 Techniques recommandées pour l'exécution des radiogrammes numériques
    10
  • 7.1 Dispositions de contrôle
    10
  • 7.2 Choix de la tension du tube et de la source de rayonnement
    18
  • 7.3 Systèmes de détection et écrans métalliques
    20
  • 7.4 Alignement du faisceau
    24
  • 7.5 Réduction du rayonnement diffusé
    24
  • 7.6 Distance source-objet
    25
  • 7.7 Technique de grossissement géométrique
    28
  • 7.8 Étendue maximale interprétable en une seule exposition
    29
  • 7.9 Traitement
    29
  • 7.10 Conditions d'observation à l'écran et stockage des radiogrammes numériques
    30
  • 8 Rapport de contrôle
    31
  • Annexe A (normative) Nombre recommandé d'expositions permettant un examen acceptable d'une soudure circonférentielle bout à bout
    33
  • Annexe B (normative) Indices de qualité d'image minimums
    38
  • Annexe C (normative) Détermination de la résolution spatiale de base
    44
  • Annexe D (normative) Détermination des valeurs minimales de gris en radiographie numérique
    48
  • Annexe E (informative) Valeurs de gris, remarques générales
    53
  • Bibliographie
    55
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