ISO 25902-1:2009 チタンパイプとチューブ—非破壊検査—パート1：渦電流検査 | 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 25902-1 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 11, Titanium.

ISO 25902 consists of the following parts, under the general title Titanium pipes and tubes — Non-destructive testing:

• Part 1: Eddy-current examination
• Part 2: Ultrasonic examination for the detection of longitudinal flaws

1 Scope

This part of ISO 25902 specifies a method for the eddy-current examination, hereafter referred to as the “examination”, for detecting flaws in titanium seamless tubes and welded tubes, hereafter referred to as the “tubes”.

Titanium tubes are now used as steam surface condensers in steam-power plants, anatomic-power plants and desalination plants. Therefore, the quality of titanium tubes is very important and this is why the eddy-current inspection method was established. This method also applies to titanium alloy tubes.

In this part of ISO 25902

• the minimum wall thickness is 0,3 mm,
• the rectangular groove and the drilled hole are permitted as reference standards,
• as the outside diameter of the titanium tube increases, the detected flaw also increases. The limit of the outside diameter of the titanium tube is 38,1 mm.

2 Normative reference

The following referenced document is indispensable for the application of this document. 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 following terms and definitions apply.