Partie 1: Principes généraux du contrôle. STANDARD. ISO. Permission can be requested from either ISO at the address below or ISO's .. editorial rules of the ISO/IEC Directives, Part 2 (see terney.info). Non-destructive testing - Magnetic particle testing - Part 1: General principles (ISO ) It supersedes BS EN ISO which is. This document supersedes EN ISO EN ISO , including amendment A It is identical It supersedes BS , which will remain current as an obsolescent.
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This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October , and conflicting national standards shall be withdrawn at the latest by October Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
This document supersedes EN , EN 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.
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. ISO shall not be held responsible for identifying any or all such patent rights. For the tube body, it specifies requirements for the detection of surface imperfections on all or part of the outside surface of tubes.
However, by agreement between the purchaser and manufacturer, it can be applicable to the inside surface over a limited length from the ends of tubes, dependent on the tube diameter.
In addition, this part of ISO can be used, as appropriate, to locate the position of external surface imperfections detected by another non-destructive testing method e.
In this case, magnetization is applied in the direction essentially perpendicular to the orientation of the particular imperfections being detected.
It can also be applicable to the testing of hollow sections. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document including any amendments applies. The type of indications, as well as the minimum dimension of the surface imperfections being detected, depends on the specific tube manufacturing process and the surface finish. In the case of third-party inspection, this shall be agreed on between the purchaser and manufacturer.
The operating authorization issued by the employer shall be according to a written procedure. The use of residual magnetism, i. In cases where there is insufficient sensitivity due, for instance, either to poor contrast between the detecting media and the part of the tube surface under inspection or as a result of the magnetization technique adopted, the tube area being tested shall, prior to inspection, be coated with a white background paint to aid contrast.
However, in all cases, the magnetization requirements together with the use of detecting media with the exception in 5. This method is intended for the detection of imperfections which lie generally parallel to the major axis of the tube.
This method is intended as in method A for the detection of imperfections which lie generally parallel to the major axis of the tube. This method favours the detection of imperfections lying at right angles to an imaginary line connecting the poles pieces of the electromagnet. Other magnetization techniques or combinations of the techniques given in 5. The coil shall be energized using an alternating or a half- or full-wave rectified or direct current source.
In this case, it shall be demonstrated by a measuring device that the induced currents in the tube wall produce a magnetic flux perpendicular to the surface. In this case, but only by agreement between the purchaser and manufacturer, it is permissible to conduct the test using residual magnetization and fluorescent particles. There shall be good contrast between the detection media and the test surface.
All testing shall be performed in accordance with an approved written procedure or the relevant product standard shall be referenced 7 Surface preparation Areas to be tested shall be free from dirt. Flexible coil The Annex A gives approximate formulae for the current required to achieve a specified tangential field strength. A list of organizations represented on izo committee can be obtained on request to its secretary.
In particular the different approval criteria needed for the different types of ISO documents should be noted. Acceptance criteria are not defined. Subscription pricing is determined by: Linear indications are those indications in which the length is more than three times the width.
For an explanation on the meaning of ISO specific terms and related to conformity assessment. In the absence of actual production parts with known discontinuities.
BS EN ISO The current is assumed to be distributed evenly over the surface and shall be derived from the peripheral dimensions. This standard is not included in any packages. Y is the spacing between adjacent windings in the coil.
Care shall be taken to ensure that indications are not disturbed after magnetization has stopped and before the component has been inspected and indications recorded. Please fill this form, we will try to respond as soon as possible.
If you find an inaccuracy fn ambiguity within a British Standard or other portion of the standard to any other person.