EN ISO 1141:2021

• Abstract:

  This document specifies requirements for 3-strand hawser-laid and 4-strand shroud-laid ropes, 8-strand braided ropes and 12-strand braided ropes for general service made of polyester, and gives rules for their designation.; This document does not cover all variations in strength or product performance. The rope manufacturer is consulted to ensure the intended design meets the requirements of the application.

• Status: Published
• Publication Date: 04-May-2021
• Withdrawal Date: 29-Nov-2021
• ICS: 59.080.50 - Ropes
• Technical Committee: CEN/TC 248 - Textiles and textile products
• Drafting Committee: CEN/TC 248/WG 3 - Ropes and agricultural twines and fishing nets
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 05-May-2021
• Completion Date: 05-May-2021
• Ref Project: SIST EN ISO 1141:2021 - Fibre ropes - Polyester - 3-, 4-, 8- and 12-strand ropes (ISO 1141:2021)

• Replaces: EN ISO 1141:2012 - Fibre ropes - Polyester - 3-, 4-, 8- and 12-strand ropes (ISO 1141:2012)
• Effective Date: 08-Jun-2022
• Refers: ISO 9554:2019 - Fibre ropes — General specifications
• Effective Date: 25-Aug-2026
• Refers: ISO 1968:2004 - Fibre ropes and cordage — Vocabulary
• Effective Date: 25-Aug-2026
• Refers: ISO 2307:2019 - Fibre ropes — Determination of certain physical and mechanical properties
• Effective Date: 25-Aug-2026
• Refers: EN 12312-3:2017+A1:2020 - Aircraft ground support equipment - Specific requirements - Part 3: Conveyor belt vehicles
• Effective Date: 28-Jan-2026
• Referred By: EN 50528:2024 - Insulating ladders for use on or near low voltage electrical installations
• Effective Date: 09-Feb-2026
• Referred By: EN 1496:2006 - Personal fall protection equipment - Rescue lifting devices
• Effective Date: 28-Jan-2026
• Referred By: EN 1492-4:2004+A1:2008 - Textile slings - Safety - Part 4: Lifting slings for general service made from natural and man-made fibre ropes
• Effective Date: 28-Jan-2026
• Referred By: EN 13573:2009 - Inland navigation vessels - Anchoring, coupling, towing, hauling and mooring systems
• Effective Date: 28-Jan-2026
• Referred By: EN 15272-3:2007 - Inland navigation vessels - Equipment for rope leading - Part 3: Roller fairleads
• Effective Date: 28-Jan-2026
• Referred By: EN 15272-1:2007 - Inland navigation vessels - Equipment for rope leading - Part 1: General requirements
• Effective Date: 28-Jan-2026
• Referred By: EN 13814:2004 - Fairground and amusement park machinery and structures - Safety
• Effective Date: 28-Jan-2026
• Consolidated By: ISO 1141:2021 - Fibre ropes — Polyester — 3-, 4-, 8- and 12-strand ropes
• Effective Date: 12-Feb-2026

Overview - EN ISO 1141:2021 (ISO 1141:2021) - Polyester fibre ropes

EN ISO 1141:2021 specifies requirements and designation rules for polyester fibre ropes in common constructions: 3‑strand hawser‑laid, 4‑strand shroud‑laid, 8‑strand braided and 12‑strand braided ropes for general service. The standard defines construction types (A, B, L, T), linear density (ktex), minimum breaking strength (MBS) values and marking rules. It replaces EN ISO 1141:2012 and clarifies that not all performance variations are covered - the rope manufacturer should be consulted to ensure suitability for a specific application.

Example designation: Fibre rope ISO 1141 – A – 30 – PES – 1
(3‑strand hawser‑laid, reference number 30, polyester, type 1 heat‑set)

Key topics and technical requirements

• Constructions covered: Type A (3‑strand), Type B (4‑strand), Type L (8‑strand braided), Type T (12‑strand braided).
• Designation rules: Number of the document (ISO 1141), construction/type code, reference number, material (PES) and stabilization type (1 = heat‑set, 2 = not heat‑set).
• Linear density and MBS tables: Nominal linear densities (ktex) and corresponding minimum breaking strengths (kN) for new dry and wet ropes are provided in Tables 1–3. Linear density is measured under reference tension per ISO 2307.
• Tolerances: Specified tolerances on linear density are included; the 2021 edition modified some linear density tolerances versus the previous edition.
• Marking: Type 1 ropes with reference numbers < 14 must be marked with a blue thread; other marking follows ISO 9554.
• Limitations and cautions: The standard notes that test MBS values depend on termination type, knots, bends, prior conditioning and test method - values in tables are not universal failure points in every situation.
• Manufacturer responsibility: The rope manufacturer sets the MBS using internal statistical methods (see ISO 9554 Annex D) and should be consulted for specific designs.

Applications - who uses EN ISO 1141:2021

• Rope manufacturers for design, production, labelling and declaration of polyester ropes.
• Purchasers and specifiers in industries requiring general‑service polyester ropes (maritime, mooring, port operations, general utility), where standardized linear density and MBS values aid selection.
• Test laboratories and quality assurance functions that verify linear density and breaking strength per ISO 2307 and ISO 9554.
• Standards and compliance teams needing consistent designation and marking rules.

Related standards

• ISO 2307 - determination of physical and mechanical properties (linear density, breaking tests)
• ISO 9554 - general specifications for fibre ropes; includes marking and statistical methods for MBS (Annex D)
• ISO 1968 - fibre ropes vocabulary (terms and definitions)

Keywords: EN ISO 1141:2021, ISO 1141:2021, polyester fibre ropes, 3‑strand rope, 4‑strand rope, 8‑strand braided, 12‑strand braided, minimum breaking strength, linear density, rope designation.

SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST EN ISO 1141:2012
Vlaknene vrvi - Poliester - 3-, 4-, 8- in 12-pramenske vrvi (ISO 1141:2021)
Fibre ropes - Polyester - 3-, 4-, 8- and 12-strand ropes (ISO 1141:2021)
Faserseile - Polyester - 3-, 4-, 8- und 12-litzige Seile (ISO 1141:2021)
Cordages en fibres - Polyester - Cordages à 3, 4, 8 et 12 torons (ISO 1141:2021)
Ta slovenski standard je istoveten z: EN ISO 1141:2021
ICS:
59.080.50 Vrvi Ropes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1141
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 59.080.50 Supersedes EN ISO 1141:2012
English Version
Fibre ropes - Polyester - 3-, 4-, 8- and 12-strand ropes (ISO
1141:2021)
Cordages en fibres - Polyester - Cordages à 3, 4, 8 et 12 Faserseile - Polyester - 3-, 4-, 8- und 12-litzige Seile
torons (ISO 1141:2021) (ISO 1141:2021)
This European Standard was approved by CEN on 22 April 2021.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1141:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1141:2021) has been prepared by Technical Committee ISO/TC 38 "Textiles" in
collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of
which is held by BSI.
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 November 2021, and conflicting national standards
shall be withdrawn at the latest by November 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 1141:2012.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 1141:2021 has been approved by CEN as EN ISO 1141:2021 without any modification.

INTERNATIONAL ISO
STANDARD 1141
Fifth edition
2021-04
Fibre ropes — Polyester — 3-, 4-, 8-
and 12-strand ropes
Cordages en fibres — Polyester — Cordages à 3, 4, 8 et 12 torons
Reference number
ISO 1141:2021(E)
©
ISO 2021
ISO 1141:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 1141:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation . 1
5 General requirements . 2
6 Physical properties . 3
7 Marking . 7
ISO 1141:2021(E)
Foreword
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