ISO 19232-3:2013 非破壊検査— X線写真の画質—パート3：画質クラス | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 19232-3 was prepared by the European Committee for Standardization (CEN) in collaboration with ISO Technical Committee TC 135, Non-destructive testing, Subcommittee SC 5, Radiation methods, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 19232-3:2004), which has been technically revised. Changes include:

• deletion of “ferrous metals” in the scope;
• update of references and definitions;
• replacement of film by detector, which includes film and digital detectors;
• use of new reduced IQI values for inspection with the gamma sources ¹⁹²Ir and ⁷⁵Se, by agreement of contracting parties and deletion of footnotes in the Tables 1 to 12;
• correction of misprints in Tables 5, 6, and 8.

ISO 19232 consists of the following parts, under the general title Non-destructive testing — Image quality of radiographs:

• Part 1: Determination of the image quality values using wire-type image quality indicators
• Part 2: Determination of the image quality value using step/hole-type image quality indicators
• Part 3: Image quality classes
• Part 4: Experimental evaluation of image quality values and image quality tables
• Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicators

1 Scope

This part of ISO 19232 specifies the minimum image quality values to ensure a uniform radiographic quality. It applies to the two types of image quality indicator as detailed in ISO 19232-1 for wire-type IQI and ISO 19232-2 for step/hole-type IQI and for the two techniques described in ISO 5579. Values are specified for the two classes of radiographic technique specified in ISO 5579.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5579 and the following apply.