ДСТУ EN 12680-1:2015
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EN 12680-1:2003
Founding -
Ultrasonic examination - Part 1: Steel castings for general purposes
ICS 77.040.20
English version
Founding - Ultrasonic examination - Part 1: Steel castings forgeneral purposes
Fonderie - Controle par ultrasons - Partie 1: Piecesmoulees en acier pour usages generaux
GieBereiwesen - Ultraschallprufung - Teil 1:StahlgussstOcke fOr allgemeine Verwendung
This European Standard was approved by CEN on 21 November 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
Management Centre: rue de Stassart, 36 B-1050 Brussels
Contents
page
Foreword 3
1 Scope 4
2 Normative references 4
3 Terms and definitions 4
4 Requirements 5
4.1 Order information 5
4.2 Extent of examination 6
4.3 Maximum permissible size of discontinuities 6
4.4 Personnel qualification 6
4.5 Wall section zones 7
4.6 Severity levels 7
5 Examination 7
5.1 Principles 7
5.2 Material 7
5.3 Equipment and coupling medium 8
5.4 Preparation of casting surfaces for examination 8
5.5 Examination procedure 9
5.6 Examination report 11
Annex A (informative) Sound-beam diameters 19
Annex В? (informative) Types of indications 21
Bibliography 33Foreword
This document (EN 12680-1:2003) has been prepared by Technical Committee CEN/TC 190 "Foundry Technology", the secretariat of which is held by DIN.
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of an identical text or by endorsement, at the latest by July 2003, and conflicting national standards shall be withdrawn at the latest by July 2003.
Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 4.10 “Inner defects" to prepare the following standard: ,
EN 12680-1, Founding — Ultrasonic examination — Part 1: Steel castings for general purposes.
This is one of three European Standards for ultrasonic examination. The other standards are:
EN 12680-2, Founding Ultrasonic examination —. Part 2: Steel castings for highly stressed components.
EN 12680-3, Founding Ultrasonic examination — Part3: Spheroidal graphite cast iron castings.
Annexes A and According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1 Scope
This European Standard specifies the requirements for the ultrasonic examination of steel castings (with ferritic structure) for general purposes and the methods for determining internal discontinuities by the pulse-echo technique.
This European Standard applies to the ultrasonic examination of steel castings which have usually received a grain refining heat treatment and which have wall thicknesses up to and including 600 mm.
For greater wall thicknesses, special agreements apply with respect to test procedure and recording levels. t
This European Standard does not apply to austenitic steels and joint welds.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 583-1, Non-destructive testing ~~ Ultrasonic examination Part 1: General principles.
EN 583-2, Non-destructive testing — Ultrasonic examination — Part 2: Sensitivity and range setting.
EN 583-5, Non-destructive testing — Ultrasonic examination Part 5: Characterization and sizing of discontinuities.
EN 12223, Non-destructive testing ~~~ Ultrasonic examination Specification for calibration block No. 1.
EN 12668-1, Non-destructive testing — Characterization and verification of ultrasonic examination equipment —. Part 1: Instruments.
EN 12668-2, Non-destructive testing Characterization and verification of ultrasonic examination equipment — Part 2: Probes.
EN 12668-3, Non-destructive testing — Characterization and verification of ultrasonic examination equipment — Part 3: Combined equipment.
EN 27963, Welds in steel Calibration block No. 2 for ultrasonic examination of welds (ISO 7963:1985).
3 Terms and definitions
For the purposes of this European Standard, the following terms and definitions apply.
NOTE Other terms and definitions used in this European Standard are given in EN 583-1, EN 583-2, EN 583-5 and EN 1330-4.
3.1
reference discontinuity echo size
smallest indication to be recorded during the assessment phase of an ultrasonic examination, usually expressed as an equivalent flat-bottomed hole diameter
3.2
point discontinuity
discontinuity, the dimensions of which are smaller than or equal to the sound-beam width
NOTE Dimensions in this standard relate to length, width and/or dimension in through-wall direction.
3.3
complex discontinuity
discontinuity, the dimensions of which are larger than the sound-beam width
NOTE Dimensions in this standard relate to length, width and/or dimension in through-wall direction.
3.4
planar discontinuity
discontinuity having two measurable dimensions
3.5
volumetric discontinuity
discontinuity having three measurable dimensions
3.6
special rim zone
outer rim zone part with special requirements (for e.g. machined surfaces, higher stresses, sealing surfaces)
3.7
production welding
any welding carried out during manufacturing before final delivery to the purchaser
3.7.1
joint welding
production welding used to assemble components together to obtain an integral unit
3.7.2
finishing welding
production welding carried out in order to ensure the agreed quality of the casting
4 Requirements
4.1 Order information
T-e following information shall be available at the time of enquiry and order (see also EN 583-1):
—? the areas of the casting and the number or percentage of castings to which the ultrasonic examination require- "'•ents apply (examination volume, extent of examination);
—? ne severity level to be applied to the various zones or areas of the casting (acceptance criteria);
—? •wjfrements for a written examination procedure;
—? are-T-er there are any additional requirements for the examination procedure, see also 5.5.1.
4.2 Extent of examination
The casting shall be examined so that the agreed areas are totally covered (insofar as this is possible from the shape of the casting) by the use of the best applicable examination technique.
For wall thicknesses greater than 600 mm, agreement shall be made between the parties concerned on the examination procedure and also on the recording and acceptance levels.
4.3 Maximum permissible size of discontinuities
4.3.1 Limits of acceptance for planar discontinuities mainly orientated perpendicular to the surface
The limits of acceptance for planar discontinuities are given in Figure 1.
Indications with measurable dimensions are not permissible as severity level 1.
The largest dimension in through-wall direction shall not exceed 10% of wall thickness, except indications with a measurable length < 10 mm. Such indications shall not exceed a dimension in through-wall direction of 25 % of wall thickness or 20 mm.
The greatest distance between indications as criterion for evaluation as single indication or indication area perpendicular or lateral to the surface shall be 10 mm.
For an area with measurable length and non-measurable dimension in through-wall direction, this non-measurable dimension shall be taken as 3 mm and the area be calculated:
4 = 3x where
—? A is the area of indication expressed in square millimetres;
—? 3 is the taken width in millimetres;
—? L is the measurable length expressed in millimetres.
4.3.2 Limits of acceptance for volumetric discontinuities
The limits of acceptance for volumetric discontinuities are given in Table 1. Any discontinuity exceeding one of the criteria shall be considered as unacceptable.
4.3.3 Maximum permissible discontinuities in the case of radiographic examination of the casting carried out as a supplement to ultrasonic examination
Unless otherwise agreed by the time of enquiry and order, when, after conducting the radiographic and the ultrasonic examination in combination, it has been demonstrated that a discontinuity is situated in the core zone, this additional information makes the discontinuity acceptable at one level less severe, e.g. severity level 3 instead of 2 for radiographic examination, see EN 1559-2.
4.4 Personnel qualification
It is assumed that ultrasonic examination is performed by qualified and capable personnel. In order to prove this qualification, it is recommended to certify