prEN 12680-3

SLOVENSKI STANDARD
01-maj-2024
Livarstvo - Ultrazvočno preskušanje - 3. del: Ulitki iz sive litine s kroglastim
grafitom
Founding - Ultrasonic testing - Part 3: Spheroidal graphite cast iron castings
Gießereiwesen - Ultraschallprüfung - Teil 3: Gussstücke aus Gusseisen mit Kugelgraphit
Fonderie - Contrôle par ultrasons - Partie 3: Pièces moulées en fonte à graphite
sphéroïdal
Ta slovenski standard je istoveten z: prEN 12680-3
ICS:
77.040.20 Neporušitveno preskušanje Non-destructive testing of
kovin metals
77.140.80 Železni in jekleni ulitki Iron and steel castings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2024
ICS 77.040.20 Will supersede EN 12680-3:2011
English Version
Founding - Ultrasonic testing - Part 3: Spheroidal graphite
cast iron castings
Fonderie - Contrôle par ultrasons - Partie 3: Pièces Gießereiwesen - Ultraschallprüfung - Teil 3:
moulées en fonte à graphite sphéroïdal Gussstücke aus Gusseisen mit Kugelgraphit
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 190.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12680-3:2024 E
worldwide for CEN national Members.

Contents Page
European 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 testing . 6
4.3 Maximum acceptable size of discontinuities . 6
4.4 Qualification of personnel . 6
4.5 Wall section zones . 6
4.6 Severity levels . 6
5 Testing . 6
5.1 Principles . 6
5.2 Material . 7
5.3 Test equipment and coupling fluid . 7
5.3.1 Ultrasonic instrument . 7
5.3.2 Probes and transducer frequencies . 7
5.3.3 Checking the ultrasonic test equipment . 8
5.3.4 Coupling fluid . 8
5.3.5 Time base range and sensitivity setting of the ultrasonic test equipment . 8
5.3.6 Detection sensitivity . 9
5.4 Preparation of casting surfaces for testing. 9
5.5 Test procedure . 10
5.5.1 General. 10
5.5.2 Sensitivity setting . 10
5.5.3 Consideration of various types of indications . 10
5.5.4 Evaluation and recording of indications . 10
5.5.5 Assessment of discontinuities to be recorded . 11
5.5.6 Characterization and sizing of discontinuities . 11
5.6 Test report . 12
Annex A (informative) Significant technical changes between this document and the
previous edition . 20
Bibliography . 22

European foreword
This document (prEN 12680-3:2023) has been prepared by Technical Committee CEN/TC 190 “Foundry
technology”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12680-3:2011.
In comparison with the previous edition, the following technical modifications have been made:
— see the detail of the changes in Annex A (Table A.1).
This is one of three European Standards for ultrasonic testing. The other standards are:
prEN 12680-1, Founding — Ultrasonic examination — Part 1: Steel castings for general purposes;
prEN 12680-2, Founding — Ultrasonic examination — Part 2: Steel castings for highly stressed
1 Scope
This document specifies the requirements for the ultrasonic testing of spheroidal graphite cast iron
castings and the techniques for determining internal discontinuities by the pulse-echo technique.
This document does not apply to ultrasonic testing of the nodularity of spheroidal graphite cast irons.
This document does not apply to phased array technique and to transmission technique.
NOTE The transmission technique has insufficient sensitivity to detect the discontinuities found in spheroidal
graphite cast iron castings and is used in exceptional cases only.
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.
EN ISO 16810, Non-destructive testing - Ultrasonic testing - General principles (ISO 16810)
EN ISO 16811, Non-destructive testing - Ultrasonic testing - Sensitivity and range setting (ISO 16811)
EN ISO 16827, Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities
(ISO 16827)
EN ISO 5577, Non-destructive testing - Ultrasonic testing - Vocabulary (ISO 5577)
EN ISO 2400, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 1 (ISO
2400)
EN ISO 22232-1, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 1: Instruments (ISO 22232-1)
EN ISO 22232-2, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 2: Probes (ISO 22232-2)
EN ISO 22232-3, Non-destructive testing - Characterization and verification of ultrasonic test equipment -
Part 3: Combined equipment (ISO 22232-3)
EN ISO 7963, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 2 (ISO
7963)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 5577 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
equivalent reference discontinuity echo size
indication to be recorded during the assessment phase of an ultrasonic test, usually expressed as an
equivalent diameter of a flat-bottomed hole (FBH)
3.2
point-like discontinuity
discontinuity, the dimensions of which are smaller than or equal to the sound-beam width
Note 1 to entry: Dimensions in this document relate to length, width and/or dimension in through-wall direction.
3.3
extended discontinuity
discontinuity, the dimensions of which are larger than the sound-beam width
Note 1 to entry: Dimensions in this document 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
rim zone
1/5 of the through-wall thickness from the surface with a minimum of 5 mm and a maximum of 30 mm
3.7
non-measurable dimension
dimension of a discontinuity that is smaller than the beam width, which depends on the probe size and
the frequency used
Note 1 to entry: Current state of the industry is < 3 mm.
3.8
dross
accumulation of fine slag particles (oxides, sulphides, etc.) in the rim zone of castings
Note 1 to entry: In smaller castings, dross is usually not detected by ultrasonic testing.
4 Requirements
4.1 Order information
The following information shall be available at the time of enquiry and order (see also EN ISO 16810):
— The areas of the casting and the number or percentage of castings to which the for ultrasonic testing
apply.
— The severity levels for small castings in accordance with Table 1 and if applicable Table 3, or for large
castings Table 2 and if applicable Table 4, to be applied to the various areas of the casting.
— Requirements for a written test procedure.
— The customer should inform the supplier about the required amount of machining.
— Whether there are any additional requirements.
NOTE 1 Severity levels in Tables 1 and 3 as well as in Tables 2 and 4 can be chosen differently.
NOTE 2 Small castings are typically produced under serial conditions, e.g. automatic moulding lines, with a mass
up to 200 kg.
NOTE 3 Large castings are typically hand moulded, with a mass higher than 200 kg.
4.2 Extent of testing
The areas of the casting to be tested shall be agreed. This agreement shall state how these areas are to be
tested, i.e. point testing or scanning, and in which directions.
These areas should be preferably indicated on the casting drawing.
For wall thicknesses outside of the range 10 mm to 500 mm, agreement shall be made between the parties
concerned on the test procedure and also on the recording and acceptance levels.
4.3 Maximum acceptable size of discontinuities
Unless otherwise agreed between the parties concerned, the maximum acceptable sizes of discontinuities
shall not exceed those of the severity level given in either Table 1 resp. 2 and/or Table 3 resp. 4.
4.4 Qualification of personnel
Ultrasonic testing shall be performed by qualified personnel. Qualification of personnel can be in
accordance with EN ISO 9712 or a certification scheme considered equivalent.
4.5 Wall section zones
The wall section shall be divided into core and rim zones as shown in Figure 1. For wall thickness equal
to or less than 10 mm the total wall thickness shall be
...