oSIST prEN ISO 5771:2023

SLOVENSKI STANDARD
oSIST prEN ISO 5771:2023
01-julij-2023
Gumene cevi ter cevni priključki za prenos brezvodnega amoniaka - Specifikacija
(ISO/DIS 5771:2023)
Rubber hoses and hose assemblies for transferring anhydrous ammonia - Specification
(ISO/DIS 5771:2023)
Gummischläuche und -schlauchleitungen für den Transport von wasserfreiem Ammoniak
- Anforderungen (ISO/DIS 5771:2023)
Tuyaux et flexibles en caoutchouc pour le transfert d'ammoniac anhydre - Spécifications
(ISO/DIS 5771:2023)
Ta slovenski standard je istoveten z: prEN ISO 5771
ICS:
83.140.40 Gumene cevi Hoses
oSIST prEN ISO 5771:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 5771:2023

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oSIST prEN ISO 5771:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 5771
ISO/TC 45/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-04-28 2023-07-21
Rubber hoses and hose assemblies for transferring
anhydrous ammonia — Specification
Tuyaux et flexibles en caoutchouc pour le transfert d'ammoniac anhydre — Spécifications
ICS: 83.140.40; 71.120.99
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
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WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 5771:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

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oSIST prEN ISO 5771:2023
ISO/DIS 5771:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 5771
ISO/TC 45/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:

Rubber hoses and hose assemblies for transferring
anhydrous ammonia — Specification
Tuyaux et flexibles en caoutchouc pour le transfert d'ammoniac anhydre — Spécifications
ICS: 83.140.40; 71.120.99
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
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WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 5771:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

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oSIST prEN ISO 5771:2023
ISO/DIS 5771:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Pressure rating . 2
5 Materials and construction . 2
5.1 Lining . 2
5.2 Reinforcement . 2
5.3 Cover . 2
5.4 Hose assemblies . 2
6 Dimensions .3
6.1 Inside diameters and tolerances . 3
6.2 Outside diameter . 3
6.3 Concentricity . 3
6.4 Tolerances on length. 3
7 Physical properties .3
7.1 Rubber compounds . 3
7.2 Finished hose . 4
7.3 Ammonia resistance tests . 4
7.3.1 Test lengths . 5
7.3.2 Ammonia conditioning . 5
7.3.3 Flexing of conditioned hose . 7
7.3.4 Burst-pressure test on conditioned and flexed hoses . 8
7.3.5 Physical-property tests on conditioned and flexed hoses . 8
8 Hose assembly delivery test and annual in-use test requirements .8
9 Frequency of testing . .8
10 Marking . . 9
11 Packaging and storage . 9
12 Test certificate . 9
Annex A (normative) Type and routine testing of production hoses and hose assemblies .10
Annex B (informative) Periodic (quality control) testing of production hoses .12
Annex C (informative) Recommendations for the lengths of hoses supplied in bulk and
for tolerances on the lengths of hose assemblies .13
Bibliography .14
iii
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oSIST prEN ISO 5771:2023
ISO/DIS 5771:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 1, Hoses (rubber and plastics).
This fifth edition edition cancels and replaces the fourth edition (ISO 5771:2008), which has been
technically revised.
The main changes are as follows:
— Update scope to include the working pressure of the hose;
— Update the normative references ISO 188 and ISO 10619-2;
— Update expression of pressure units throughout the document (MPa bar);
— Rewrite type, frequency and routine testing clause to agree with current lay out document;
— Update marking clause;
— Remove proof pressure and change of length tests as routine tests on finished hose.
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.
iv
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oSIST prEN ISO 5771:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 5771:2023(E)
Rubber hoses and hose assemblies for transferring
anhydrous ammonia — Specification
WARNING — Persons using this International Standard should be familiar with normal
laboratory practice. This standard does not purport to address all the safety problems, if any,
associated with its use. It is the responsibility of the user to establish appropriate health and
safety practices and to ensure compliance with any national regulatory conditions.
CAUTION — All personnel working with anhydrous ammonia and its delivery systems should
be familiar with and utilize the necessary safety precautions to minimize the potential for
personal injury and property damage. Do not use anhydrous-ammonia hose assemblies at
temperatures or pressures above those recommended by the hose manufacturer. Never recouple
an anhydrous-ammonia hose. Hoses manufactured to this specification are suitable for use with
anhydrous ammonia only.
1 Scope
This International Standard specifies the minimum requirements for rubber hoses used for transferring
ammonia, in liquid or in gaseous form, at ambient temperatures from −40 °C up to and including +55 °C
at a working pressure of 2,5 MPa (25 bar). It does not include specifications for end fittings, but is
limited to the performance of the hoses and hose assemblies.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1307, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and tolerances
on cut-to-length hoses
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of
hoses and the lengths of hose assemblies
ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 10619-2:2021, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part
2: Bending tests at sub-ambient temperatures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 apply.
1
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oSIST prEN ISO 5771:2023
ISO/DIS 5771:2023(E)
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Pressure rating
The pressure rating shall comply with the requirements of Table 1.
Table 1 — Pressure requirements
Pressure requirements
Parameter
bar MPa
Maximum working pressure 25 2,5
Proof pressure 63 6,3
Minimum burst pressure 125 12,5
5 Materials and construction
5.1 Lining
The lining shall be of uniform thickness of at least 1,5 mm, measured in accordance with ISO 4671,
and free from holes, porosity and other defects. The finished hose lining shall comply with the
performance requirements specified in Table 3. The material used shall be resistant to hardening or
other deterioration due to the action of ammonia.
5.2 Reinforcement
The reinforcement shall consist of a material not adversely affected by permeating ammonia. It shall
be applied evenly and uniformly, and in such a way that the finished hose complies with the relevant
performance requirements specified in Table 4.
A suitable material is corrosion-resistant stainless steel.
5.3 Cover
The rubber cover, when used, shall be uniform in quality and thickn
...