Foreword

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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.

This second edition cancels and replaces the first edition ( ISO 13956:2010 ), which has been technically revised.

The main changes are as follows:

a Note has been added to the scope;
guidance on assessment of air pockets in the fusion zone has been given in Clause 8, Figure 5 and Figure 6;
symbols have been aligned with relevant ISO documents;
Figure 5 has been corrected.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

1 Scope

This document specifies a method for the evaluation of the ductility of the fusion joint interface of assemblies of polyethylene (PE) pipe and electrofusion saddles, intended for the conveyance of fluids.

NOTE The applicability of this method depends upon the design of the saddle. If not applicable, the strip-bend test according to ISO 21751 ^[ 1 ^] is considered an alternative.

2 Normative references

3 Terms and definitions

4 Principle

5 Apparatus

5.1 General

5.2 Tensile test equipment — Type A1 or A2

5.3 Compressive test equipment — Type B

5.4 Test equipment — Type C

6 Sampling

6.1 Preparation of test pieces

6.2 Number of test pieces

7 Conditioning

8 Procedure

9 Test report

Bibliography