SVENSK STANDARD SS-EN ISO 17637:2017

SVENSK STANDARD

Fastställd/Approved: 2017-01-09Publicerad/Published: 2017-01-12Utgåva/Edition: 2Språk/Language: engelska/EnglishICS: 25.160.40

SS-EN ISO 17637:2017

Oförstörande provning av svetsar – Visuell provning av smältsvetsförband (ISO 17637:2016)

Non-destructive testing of welds – Visual testing of fusion-welded joints (ISO 17637:2016)

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Europastandarden EN ISO 17637:2016 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 17637:2016.

Denna standard ersätter SS-EN ISO 17637:2011, utgåva 1.

The European Standard EN ISO 17637:2016 has the status of a Swedish Standard. This document contains the official English version of EN ISO 17637:2016.

This standard supersedes the Swedish Standard SS-EN ISO 17637:2011, edition 1.

Denna standard är framtagen av kommittén för Oförstörande provning, SIS / TK 125.

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN ISO 17637 December 2016

ICS 25.160.40 Supersedes EN ISO 17637:2011English Version Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO 17637:2016) Contrôle non destructif des assemblages soudés - Contrôle visuel des assemblages soudés par fusion (ISO 17637:2016) Zerstörungsfreie Prüfung von Schweißverbindungen - Sichtprüfung von Schmelzschweißverbindungen (ISO 17637:2016)

This European Standard was approved by CEN on 19 October 2016. 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, 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 andUnited Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 17637:2016 E


1 Scope ................................................................................................................................................................................................................................. 12 Normative references ...................................................................................................................................................................................... 13 Termsanddefinitions ..................................................................................................................................................................................... 14 Test conditions and equipment ............................................................................................................................................................. 15 Personnelqualification ................................................................................................................................................................................. 26 Visual testing ............................................................................................................................................................................................................ 2

6.1 General ........................................................................................................................................................................................................... 26.2 Visual testing of joint preparation ......................................................................................................................................... 26.3 Visual testing during welding .................................................................................................................................................... 26.4 Visual testing of the finished weld ......................................................................................................................................... 3

6.4.1 General...................................................................................................................................................................................... 36.4.2 Cleaning and dressing ................................................................................................................................................. 36.4.3 Profile and dimensions ............................................................................................................................................... 36.4.4 Weld root and surfaces ............................................................................................................................................... 36.4.5 Post-weld heat treatment ......................................................................................................................................... 4

6.5 Visual testing of repaired welds ............................................................................................................................................... 46.5.1 General...................................................................................................................................................................................... 46.5.2 Partially removed weld .............................................................................................................................................. 46.5.3 Completely removed weld ....................................................................................................................................... 4

7 Test records................................................................................................................................................................................................................ 4Annex A (informative) Examples of test equipment ............................................................................................................................. 6Bibliography .............................................................................................................................................................................................................................10

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Contents Page

European foreword ...................................................................................................................................................... ÉÖ

SS-EN ISO 17637:2017 (E) This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-8024387

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European foreword

This document (EN ISO 17637:2016) has been prepared by Technical Committee ISO/TC 44 "Welding and allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” 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 June 2017, and conflicting national standards shall be withdrawn at the latest by June 2017.

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.

This document supersedes EN ISO 17637:2011.

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, 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 the United Kingdom.

Endorsement notice

The text of ISO 17637:2016 has been approved by CEN as EN ISO 17637:2016 without any modification.

SS-EN ISO 17637:2017 (E)This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-8024387


Non-destructive testing of welds — Visual testing of fusion-welded joints

1 Scope

This document specifies the visual testing of fusion welds in metallic materials. It may also be applied to visual testing of the joint prior to welding.

2 Normative references

There are no normative references in this document.

3 Termsanddefinitions

No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/

— ISO Online browsing platform: available at http://www.iso.org/obp

4 Test conditions and equipment

The illuminance at the surface with white light shall be a minimum of 350 lx; wearing of tinted goggles (e.g. protective sunglasses) increases the minimum illuminance. However, 500 lx is recommended.

For direct inspection, the access shall be sufficient to place the eye within 600 mm of the surface to be examined and at an angle not less than 30° (see Figure 1).

a Range.

Figure 1 — Access for testing

Remote inspection using mirrors, boroscopes, fibre optic cables or cameras shall be considered when the access for testing in accordance with Figure 1 is not possible or when specified by an application standard.

An additional light source can be used to increase the contrast and relief between imperfections and the background.

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http://www.electropedia.org/

http://www.iso.org/obp

Where the result of visual testing is inconclusive, the visual test should be supplemented by other non-destructive testing methods for surface inspections.

Examples of equipment used for visual testing are given in Annex A.

5 Personnelqualification

Visual testing of welds and the evaluation of results for final acceptance shall be performed by qualified and capable personnel. It is recommended that the personnel performing indirect visual testing is qualified according to ISO 9712 or at an appropriate level in the relevant industry sector.

6 Visual testing

6.1 General

This document does not define the extent of visual testing. However, this should be determined in advance, e.g. by reference to an application or product standard.

The examiner shall have access to the necessary inspection and production documentation required.

Any visual testing prior to, during or after completion of the weld should be carried out while physical access is still possible. This may include the visual testing of surface treatments.

6.2 Visual testing of joint preparation

When visual testing is required prior to welding, the joint shall be examined to check the following:

a) the shape and dimensions of the weld preparation meet the requirements of the welding procedure specification;

b) the fusion faces and adjacent surfaces are clean and any required surface treatment has been carried out in accordance with the application or product standard;

c) the parts to be welded are correctly fixed in relation to each other according to drawings or instructions.

6.3 Visual testing during welding

When required, the weld shall be tested during the welding process to check the following:

a) each run or layer of weld metal is cleaned before it is covered by a further run, particular attention being paid to the junctions between the weld metal and the fusion face;

b) there are no visible imperfections, e.g. cracks or cavities; if imperfections are observed, they shall be reported so that remedial action can be taken before the deposition of further weld metal;

c) the transition between the runs and between the weld and the parent metal is so formed that satisfactory melting can be accomplished when welding the next run;

d) the depth and shape of gouging is in accordance with the WPS or compared with the original groove shape in order to ensure complete removal of the weld metal as specified;

e) after any necessary repairs/remedial action, the weld conforms to the original requirements of the WPS.

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SS-EN ISO 17637:2017 (E) This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-8024387

6.4 Visualtestingofthefinishedweld

6.4.1 General

The finished weld shall be examined to determine whether it meets the requirements of the application or product standard or other agreed acceptance criteria, e.g. ISO 5817 or ISO 10042. Finished welds shall at least be examined in accordance with the requirements given in 6.4.2 to 6.4.5.

6.4.2 Cleaning and dressing

The weld shall be examined to check the following:

a) all slag has been removed by manual or mechanical means in order to avoid imperfections being obscured;

b) there are no tool impressions or blow marks;

c) when weld dressing is required, overheating of the joint due to grinding is avoided and that grinding marks and an uneven finish are also avoided;

d) for fillet welds and butt welds to be dressed flush, the joint merges smoothly with the parent metal without under flushing.

If imperfections (caused by dressing or otherwise) are observed, they shall be reported so that remedial action can be taken.

6.4.3 Profileanddimensions


a) the profile of the weld face and the height of any excess weld metal meet the requirements of the acceptance criteria (see 6.4.1);

b) the surface of the weld is regular: the pattern and the pitch of weave marks present an even and satisfactory visual appearance; the distance between the last layer and the parent metal or the position of runs has been measured where required by the WPS;

c) the weld width is consistent over the whole of the joint and that it meets the requirements given in the weld drawing or acceptance criteria (see 6.4.1); in the case of butt welds, the weld preparation shall be checked to ensure it has been completely filled and meets the requirements of drawing or acceptance criteria (see 6.4.1).

6.4.4 Weld root and surfaces

The visually accessible parts of the weld, i.e. the weld root for a single-sided butt weld and the weld surfaces, shall be examined for deviations from the acceptance criteria (see 6.4.1).


a) in the case of single-sided butt welds, the penetration, root concavity and any burn-through or shrinkage grooves are within the limits specified in the acceptance criteria over the whole of the joint;

b) any undercut is within the limits indicated in the acceptance criteria;

c) any imperfections such as cracks or porosity, detected using optical aids when necessary, in the weld surface or heat affected zones comply with the appropriate acceptance criteria;

d) any attachments temporarily welded to the object to facilitate production or assembly and which are prejudicial to the function of the object or the ability to examine it are removed so that the

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SVENSK STANDARD SS-EN ISO 17637:2017