ISO/TS 17920:2015

TECHNICAL ISO/TS
SPECIFICATION 17920
First edition
2015-08-01
Fibre ropes for offshore
stationkeeping — Aramid
Cordages en fibres pour le maintien en position des structures
marines — Aramide
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Materials . 2
4.1 Rope core material . 2
4.2 Rope cover material . 2
4.3 Other materials . 2
5 Requirements — Rope properties . 2
5.1 Minimum breaking strength . 2
5.2 Minimum core tenacity . 3
5.3 Axial compression fatigue properties . 3
5.4 Particle ingress protection . 3
5.5 Cyclic loading performance . 3
6 Requirements — Rope layout and construction . 3
6.1 General . 3
6.2 Type of construction . 3
6.3 Rope core . 3
6.4 Protective cover . 4
6.5 Terminations . 4
6.6 Length of rope . 4
7 Rope testing . 5
7.1 Type testing . 5
7.1.1 General. 5
7.1.2 Sampling. 5
7.1.3 Breaking strength, core tenacity and stiffness tests. 5
7.1.4 Axial compression fatigue properties test . 6
7.1.5 Torque properties tests . 6
7.1.6 Linear density test . 6
7.1.7 Cyclic loading (endurance) test . 6
7.1.8 Protective cover thickness . 6
7.1.9 Particle ingress protection . 6
7.2 Testing of current production . 6
7.2.1 Sampling and testing . 6
7.2.2 Length measurement . 7
8 Report . 7
8.1 Prototype rope . 7
8.2 Current production . 7
9 Certification . 7
10 Marking, labelling, and packaging . 8
10.1 Marking . 8
10.2 Labelling . 8
10.3 Packaging . 8
Annex A (normative) Fibre qualification and testing . 9
Annex B (normative) Rope testing .12
Annex C (normative) Axial compression fatigue properties test .21
Annex D (informative) Guidance for rope handling care .23
Annex E (informative) Certificate of conformity — Aramid ropes for offshore stationkeeping .34
Annex F (informative) Commentary.35
Bibliography .41
iv © ISO 2015 – All rights reserved

Foreword
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The committee responsible for this document is ISO/TC 38, Textiles.
TECHNICAL SPECIFICATION ISO/TS 17920:2015(E)
Fibre ropes for offshore stationkeeping — Aramid
1 Scope
This Technical Specification specifies the main characteristics and test methods of new aramid fibre
ropes used for offshore stationkeeping.
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.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 1968, Fibre ropes and cordage — Vocabulary
ISO 2060, Textiles — Yarn from packages — Determination of linear density (mass per unit length) by
the skein method
ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression
testing machines – Verification and calibration of the force-measuring system
ISO 18692, Fibre ropes for offshore stationkeeping — Polyester
ASTM D1907, Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
ASTM D1776, Practice for Conditioning and Testing Textiles
ASTM D6611, Standard Test Method for wet and dry Yarn-on-Yarn Abrasion resistance
ASTM D7269, Test Methods for Tensile Testing of Aramid Yarns
CI 1503, Test method for yarn-on-yarn abrasion
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1968, ISO 18692, and the
following apply.
3.1
aramid
long-chain synthetic polyamide in which at least 85% of the amide linkages are attached directly to two
aromatic rings
[SOURCE: ISO 1968, 3.3.1, modified]
3.2
axial compression fatigue
failure mode for fibre rope such as aramid (3.1) under low tension or compression
4 Materials
4.1 Rope core material
The aramid fibre used
...