ISO/TS 16943:2019

TECHNICAL ISO/TS
SPECIFICATION 16943
First edition
2019-12
Thermoplastic pipes for the
conveyance of fluids — Inspection
of polyethylene electrofusion socket
joints using phased array ultrasonic
testing
Tubes en matières thermoplastiques pour le transport des fluides —
Contrôle des assemblages par emboîtures électrosoudables en
polyéthylène au moyen de la technique pas ultrasons multi-éléments
Reference number
©
ISO 2019
© ISO 2019
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ii © ISO 2019 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 3
5 Information required prior to testing . 3
5.1 Items to be defined for the procedure development . 3
5.2 Specific information required by the operator before testing . 3
5.3 Written test procedure . 3
6 Personnel qualifications. 4
7 Equipment . 4
7.1 General . 4
7.2 Ultrasonic instrument and display . 4
7.3 Ultrasonic probes . 4
7.4 Scanning mechanisms. 5
7.5 Couplant . 5
8 Range and sensitivity settings . 5
8.1 Settings . 5
8.1.1 General. 5
8.1.2 Range setting — Test volume . 5
8.1.3 Sensitivity setting . 6
8.2 Reference sample . 7
8.2.1 General. 7
8.2.2 Reference block . 7
8.2.3 Electrofusion socket fitting . 7
8.3 Checking of the settings . 7
9 Equipment checks . 7
10 Test procedure . 8
10.1 Procedure qualification . 8
10.2 Scan increment . 9
10.3 Component geometry . 9
10.4 Preparation of scanning surfaces . 9
10.5 Component temperature . 9
10.6 Testing . 9
10.7 Data storage . 9
11 Evaluation and analysis of test data .10
11.1 General .10
11.2 Assessing the quality of the test data .10
11.3 Identification of relevant indications .10
11.4 Classification of relevant indications .10
11.5 Determination of location and size of indications .10
11.6 Assessment of indications .11
12 Test report .11
Annex A (informative) Examples of phased array images .13
Annex B (informative) Example of a reference block .15
Annex C (informative) Example procedures for producing imperfections in electrofusion
socket joints.16
Annex D (informative) Detection of melt fusion zone boundary indication .20
Bibliography .22
iv © ISO 2019 – All rights reserved

Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves
for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic
materials and their accessories — Test methods and basic specifications.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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TECHNICAL SPECIFICATION ISO/TS 16943:2019(E)
Thermoplastic pipes for the conveyance of fluids —
Inspection of polyethylene electrofusion socket joints
using phased array ultrasonic testing
1 Scope
This document describes the phased array ultrasonic testing (PAUT) of polyethylene electrofusion (EF)
socket joints used for the conveyance of fluids. This document provides a test whereby the presence
of imperfections such as voids, wire dislocation, misalignment, pipe under-penetration, particulate
contamination, cold fusion and lack of fusion in electrofusion socket joints can be detected. The
technique is only applicable to polyethylene electrofusion socket fittings without a barrier to ultrasonic
waves. This document also provides requirements for procedure qualification and guidance for
personnel qualifications, which are essential for the application of this test method
NOTE 1 At the time of publication, experience only exists on the use of PAUT for polyethylene (PE80 and
[7][8][9][10][11][12][13]
PE100) electrofusion socket joint sizes between 90 mm and 710 mm (SDR 11 and 17) .
NOTE 2 Round robin testing has shown that PAUT is a viable method for enhancing the integrity assessment
[16]
of electrofusion joints .
NOTE 3 This document does not apply to the detection of unscraped pipe. Such detection can be achieved by a
simple visual inspection, provided mechanical scraping tools are employed.
2 Normative references
The following documents are ref
...