SIST EN 3718:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YRþQRLuft- und Raumfahrt - Prüfverfahren für metallische Werkstoffe - Ultraschallprüfung von RohrenSérie aérospatiale - Méthode d'essai applicable aux matériaux métalliques - Contrôle par ultrasons des tubesAerospace series - Test method for metallic materials - Ultrasonic inspection of tubes49.035Sestavni deli za letalsko in vesoljsko gradnjoComponents for aerospace construction49.025.01Materiali za letalsko in vesoljsko gradnjo na splošnoMaterials for aerospace construction in generalICS:Ta slovenski standard je istoveten z:EN 3718:2012SIST EN 3718:2012en,de01-september-2012SIST EN 3718:2012SLOVENSKI
STANDARD



SIST EN 3718:2012



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3718
March 2012 ICS 49.030.60 English Version
Aerospace series - Test method for metallic materials - Ultrasonic inspection of tubes
Série aérospatiale - Méthode d'essai applicable aux matériaux métalliques - Contrôle par ultrasons des tubes
Luft- und Raumfahrt - Prüfverfahren für metallische Werkstoffe - Ultraschallprüfung von Rohren This European Standard was approved by CEN on 21 January 2011.
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 CEN-CENELEC 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3718:2012: ESIST EN 3718:2012



EN 3718:2012 (E) 2 Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Short description of the procedure . 4 5 Equipment requirements . 4 6 Preparation for inspection . 9 7 Inspection procedure . 10 8 Evaluation . 11 9 Written instruction . 12 10 Qualification and approval of personnel . 12 11 Inspection and test report . 12
SIST EN 3718:2012



EN 3718:2012 (E) 3 Foreword This document (EN 3718:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. 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 September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 3718:2012



EN 3718:2012 (E) 4 1 Scope This European Standard specifies the requirements for ultrasonic inspection of tubes in metallic materials with an external diameter ≥ 5 mm. For other cases, the use of this standard is by agreement between the manufacturer and the purchaser. The purpose of the ultrasonic inspection is the detection of defects within the wall thickness and at the outer and inner surfaces of the tube. The method will detect two dimensional defects in the longitudinal and circumferential directions perpendicular to the tube wall. Where inspection for other types of defects is required, this requirements should be stated on the order. 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 2078, Aerospace series — Metallic materials — Manufacturing schedule, inspection schedule, inspection and test report — Definition, general principles, preparation and approval EN 4050-1, Aerospace series — Test method for metallic materials — Ultrasonic inspection of bars, plates, forging stock and forgings — Part 1: General requirements 1)
EN 4179, Aerospace series — Qualification and approval of personnel for non-destructive testing ISO 7963, Non-destructive testing — Ultrasonic testing — Specification for calibration block No. 2 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 4050-1 apply. 4 Short description of the procedure The inspection shall be carried out using ultrasonic test equipment, which emits ultrasonic signals passing through a liquid coupling medium obliquely into the tube under test and which receives and evaluates the reflected (or transmitted) signals. The tubes shall be inspected automatically and completely i.e. the relative movement of probe and tube under test shall be accomplished with the aid of a manipulator. The corresponding signal amplitudes from the ultrasonic test equipment shall be plotted as a function of the location, e.g. amplitude scans or C-scans. 5 Equipment requirements 5.1 Calibration blocks Calibration blocks as per ISO 7963 or equivalent standards shall be used to check the proper function and characteristics of the ultrasonic test unit and probes. The method of checking the equipment and requirements concerning the calibration blocks shall be agreed between the manufacturer and the purchaser.
1) Published as ASD-STAN Prestandard at the date of publication of this standard (www.asd-stan.org). SIST EN 3718:2012



EN 3718:2012 (E) 5 5.2 Reference specimens A reference specimen shall be fabricated from a tube consisting of the same material, having the same nominal diameter, wall thickness, surface condition and heat treatment condition as the tubes to be inspected. The selected length of the reference specimen shall be such that it can be tested in the test system described below. The reference specimen shall not have any defects or other irregularities that can produce indications or interfere with the detection of the reference notches. Four reference notches of the same dimensions (depth, width, length) as shown in Figure 1 shall be introduced in each tube. The depth, width and length of the notches are defined in Table 1 and subdivided into classes.
A-A B.B C-C D-D
Longitudinal defects Longitudinal defects Circumferential defects Circumferential defects
2 a212dR
t RR =+=
2 i212dr
t rr =+= t = Depth b = Widht L = Length di = Internal diameter da = External diameter P ≥ 20 mm Figure 1 — Reference specimen with four notches in longitudinal and circumferential direction on the inner and outer surface of the tube wall SIST EN 3718:2012



EN 3718:2012 (E) 6 Table 1 — Reference notch dimensions Dimensions in millimetres Class Depth Length Width 5 0,05 1,5 0,10 4 0,05 3,0 0,10 3 0,08 3,0 0,10 2 0,10 3,0 0,10 1 5 % of a a
6,0 0,10 a a is wall thickness in millimetres.
The reference notches shall be rectangular for notches in the longitudinal direction and shall have the shape of a ring segment in the circumferential direction and edge radii ≤ 0,13 mm. The depth of the notch shall correspond to a mean value, measured from the tube surface to the respective penetration depth of the notch. Notch dimensions shall comply with the values specified in Table 1 to within ± 15 %. The notch depth shall be measured from the circular surface to the deepest penetration of the notch. Measurements may be made by replication or by a destructive method on a duplicate notch which has identical ultrasonic response (amplitude within 90 % to 110 % of the reference notch amplitude). In order to have access to notches lying inside the reference specimen, a window may be cut into the opposite tube wall to provide access to the notch. The window shall not be so large as to interfere with the ultrasonic responses from the notch. Each reference specimen shall be identified. The
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