SIST EN 10228-4:2016

SLOVENSKI STANDARD
oSIST prEN 10228-4:2014
01-oktober-2014
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Non-destructive testing of steel forgings - Part 4: Ultrasonic testing of austenitic and
austenitic-ferritic stainless steel forgings
Zerstörungsfreie Prüfung von Schmiedestücken aus Stahl - Teil 4: Ultraschallprüfung von
Schmiedestücken aus austenitischem und austenitisch-ferritischem nichtrostendem Stahl
Essais non destructifs des pièces forgées en acier - Partie 4 : Contrôle par ultrasons des
pièces forgées en aciers inoxydables austénitiques et austéno-ferritiques
Ta slovenski standard je istoveten z: prEN 10228-4
ICS:
77.040.20 Neporušitveno preskušanje Non-destructive testing of
kovin metals
77.140.85 Železni in jekleni kovani Iron and steel forgings
izdelki
oSIST prEN 10228-4:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 10228-4:2014

EUROPEAN STANDARD
WHITE DRAFT
prEN 10228-4
NORME EUROPÉENNE

EUROPÄISCHE NORM

August 2014
ICS 77.040.20; 77.140.85 Will supersede EN 10228-4:1999
English Version
Non-destructive testing of steel forgings - Part 4: Ultrasonic
testing of austenitic and ferritic-austenitic stainless steel forgings
Essais non destructifs des pièces forgées en acier - Partie Zerstörungsfreie Prüfung von Schmiedestücken aus Stahl -
4: Contrôle par ultrasons des pièces forgées en aciers Teil 4: Ultraschallprüfung von Schmiedestücken aus
inoxydables austénitiques et austéno-ferritiques austenitischem und austenitisch-ferritischem
nichtrostendem Stahl
This draft European Standard is submitted to ECISS/COCOR before submission to CEN members for formal vote. It has been drawn up by
the Technical Committee ECISS/TC 111.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10228-4:2014 E
worldwide for CEN national Members.

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Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Definitions .4
4 Mandatory information .5
5 Test procedure .5
5.1 General .5
5.2 Form .5
5.3 Content .5
6 Personnel qualification .6
7 Equipment and accessories .6
7.1 Instrument .6
7.2 Probes .6
7.3 Calibration blocks .7
7.4 Reference blocks .7
7.5 Couplant .7
8 Routine calibration and checking .8
9 Stage of manufacture .8
10 Surface condition.8
10.1 General .8
10.2 Surface finish related to quality class .8
10.3 As-forged surface condition .8
11 Test sensitivity .9
11.1 General .9
11.2 Normal-beam probes .9
11.3 Angle-beam probes .9
11.4 Repeat testing .9
12 Scanning .9
12.1 General .9
12.2 Complex forgings . 10
12.3 Grid scanning coverage . 10
12.4 100 % scanning coverage . 10
12.5 Scanning speed . 10
13 Classification . 13
13.1 Classification of indications . 13
13.2 Classification of discontinuities . 15
14 Recording levels and acceptance criteria . 17
15 Sizing . 19
16 Test report . 20
Annex A (informative) Maximum testable depth for corresponding beam path range for
circumferential angle beam scans . 21
Annex B (informative) Amplitude of indication in dB relative to % DAC . 22
Annex C (informative) Significant changes to the version EN 10228-4:1999 . 23

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Foreword
This document (prEN 10228-4:2014) has been prepared by Technical Committee ECISS/TC 111 “Steel
castings and forgings”, the secretariat of which is held by AFNOR.
This document is currently submitted to the COCOR Vote.
This document will supersede EN 10228-4:1999.
EN 10228 consists of the following parts under the general title "Non-destructive testing of steel forgings":
 Part 1: Magnetic particle inspection
 Part 2 : Penetrant testing
 Part 3 : Ultrasonic testing of ferritic or martensitic steel forgings
 Part 4: Ultrasonic testing of austenitic and ferritic- austenitic stainless steel forgings.
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1 Scope
This Part of EN 10228 describes techniques for the manual, pulse-echo, ultrasonic testing of forgings
manufactured from austenitic and ferritic-austenitic stainless steels. Mechanised scanning techniques, such
as immersion testing, may be used but should be agreed between the purchaser and supplier (see clause 4).
This Part of EN 10228 applies to four types of forgings, classified according to their shape and method of
production. Types 1, 2 and 3 are essentially simple shapes. Type 4 covers complex shapes.
This Part of EN 10228 does not apply to:
 closed die forgings;
 turbine rotor and generator forgings.
Ultrasonic testing of ferritic and martensitic steel forgings is the subject of Part 3 of this European Standard.
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 1330-1:1998 Non-destructive testing - Terminology - Part 1: List of general terms
EN 1330-4:2010, Non-destructive testing - Terminology - Part 4: Terms used in ultrasonic testing
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 ISO 2400, Non-destructive testing - Ultrasonic testing - Specification for calibration block No. 1 (ISO 2400)
EN ISO 9712, Non-destructive testing -- Qualification and certification of NDT personnel (ISO 9712)
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)
3 Definitions
For the purpose of this document the terms and definitions given in EN 1330-1:1998 and EN 1330-4:2010
apply.
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4 Mandatory information
The following aspects concerning ultrasonic testing shall be agreed between the purchaser and supplier at the
time of the enquiry or order:
a) the manufacturing stage(s) at which ultrasonic testing shall be performed. (see clause 9)
b) the volume(s) to be tested and whether grid scanning coverage or 100 % scanning coverage is required
(see clause 12);
c) whether near surface testing is required (see 7.2.6);
d) the quality class required, or the quality classes and the zones to which they apply (see clause 14);
e) the applicable recording/acceptance criteria if different from those detailed in Table 5, Table 6 or Table 7;
f) whether any special scanning coverage, equipment or couplant is required in addition to that detailed in
clauses 7 and 12;
g) the scanning technique to be used if not manual (see clause 1);
h) the sizing techniques to be used for extended discontinuities (see clause 15);
i) the technique(s) to be used for setting sensitivity (see clause 11);
j) whether the test is to be conducted in the presence of the purchaser or his representative;
k) whether a written procedure shall be submitted for approval by the purchaser (see clause 5);
l) whether testing by angle-beam probes is required (see 11.3);
m) the remaining test requirements for complex forgings (type 4) (see 12.2).
5 Test procedure
5.1 General
Ultrasonic testing shall be performed in accordance with a written test procedure. Where specified in the
enquiry or order, the written test procedure shall be submitted to the purchaser for approval prior to the test.
5.2 Form
The written test procedure shall be one of the following:
a) a product specification;
b) a test procedure written specifically for the application;
c) this Part of EN 10228 may be used if it is accompanied by examination details specific to the application.
5.3 Content
The written test procedure shall contain the following details as minimum requirements:
a) description of the forgings to be tested;
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b) reference documents;
c) qualification and certification of testing operator;
d) stage of manufacture at which the test is carried out;
e) testing zones specified in terms of the applicable quality classes;
f) preparation of scanning surfaces;
g) couplant;
h) description of the test equipment;
i) calibration and checking of the test equipment;
j) scanning plan;
k) description and sequence of testing operations;
l) recording levels;
m) characterisation of discontinuities;
n) acceptance criteria;
o) test report.
6 Personnel qualification
Personnel shall be qualified and certificated in accordance with the requirements detailed in EN ISO 9712.
7 Equipment and accessories
7.1 Instrument
The ultrasonic instrument shall feature A-scan presentation and shall conform to EN 12668-1.
7.2 Probes
7.2.1 General
Probes used for the initial detection of discontinuities shall conform to EN 12668-2. Where supplementary
probes are used for purposes other than the initial detection of discontinuities, they need not conform to
EN 12668-2.
7.2.2 Contouring
When required, probes shall be contoured in accordance with EN ISO 16811.
7.2.3 Nominal frequency
Probes shall have a nominal frequency in the range from 0,5 MHz to 6 MHz.
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7.2.4 Normal-beam probes
Effective transducer diameter shall be in the range from 10 mm to 40 mm.
7.2.5 Angle-beam probes
Beam angles of angle-beam probes shall be in the range from 35° to 70°.
Effective transducer area shall be in the range from 20 mm² to 625 mm².
7.2.6 Dual-element probes
If near-surface testing is required, then dual-element probes shall be used.
7.3 Calibration blocks
Calibration blocks shall conform to the requirements detailed in EN ISO 2400.
7.4 Reference blocks
Reference blocks shall be used when sensitivity is to be established by the distance amplitude curve (DAC)
technique and/or when discontinuities are to be sized in terms of amplitude relative to reference reflectors by
the DAC technique. The surface condition of the reference block shall be representative of the surface
condition of the object to be tested. Unless otherwise specified the reference block shall contain at least three
reflectors covering the entire depth range being tested.
The reference block shall be manufactured from one of the following:
a) an excess length of the object to be tested
b) a part of the same material and with the same heat treatment condition as the object to be tested;
c) a part having similar acoustic properties to the object to be tested.
NOTE 1 The choice of a test block with similar acoustic properties should be to the appreciation of a Level 2 qualified
person.
Reference blocks shall not be used for the distance gain size (DGS) technique other than for checking the
accuracy of a particular DGS diagram.
NOTE 2 Reflector sizes different from those detailed in Tables 5 and 6 may be used as long as the test sensitivity is
corrected accordingly.
7.5 Couplant
The same type of couplant shall be used for the setting of range and sensitivity, for scanning and for the
assessment of discontinuities.
NOTE Examples of suitable couplants are: water (with or without corrosion inhibitor or softener), grease, oil, glycerol
and water cellulose paste.
After the test, couplant shall be removed if its presence could adversely affect later manufacturing or testing
operations or the integrity of the test object.
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8 Routine calibration and checking
The combined equipment (instrument and probes)
...