SIST EN ISO 3994:2026

SLOVENSKI STANDARD
01-maj-2026
Polimerne cevi - S plastomerno spiralo ojačene plastomerne cevi za sesanje in
odvajanje vodnih materialov - Specifikacija (ISO 3994:2026)
Plastics hoses - Helical-thermoplastic-reinforced thermoplastics hoses for suction and
discharge of aqueous materials - Specification (ISO 3994:2026)
Kunststoffschläuche - Mit einer thermoplastischen Wendel verstärkte thermoplastische
Schläuche zum Ansaugen und Fördern wässriger Stoffe - Anforderung (ISO 3994:2026)
Tuyaux en plastiques - Tuyaux thermoplastiques à renforcement thermoplastique en
spirale pour aspiration et refoulement de matières aqueuses - Spécifications (ISO
3994:2026)
Ta slovenski standard je istoveten z: EN ISO 3994:2026
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
83.120 Ojačani polimeri Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3994
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2026
EUROPÄISCHE NORM
ICS 23.040.70 Supersedes EN ISO 3994:2014
English Version
Plastics hoses - Helical-thermoplastic-reinforced
thermoplastics hoses for suction and discharge of aqueous
materials - Specification (ISO 3994:2026)
Tuyaux en plastiques - Tuyaux thermoplastiques à Kunststoffschläuche - Mit einer thermoplastischen
renforcement thermoplastique en spirale pour Wendel verstärkte thermoplastische Schläuche zum
aspiration et refoulement de matières aqueuses - Ansaugen und Fördern wässriger Stoffe - Anforderung
Spécifications (ISO 3994:2026) (ISO 3994:2026)
This European Standard was approved by CEN on 3 March 2026.

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, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3994:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3994:2026) has been prepared by Technical Committee ISO/TC 45 "Rubber and
rubber products" in collaboration with Technical Committee CEN/TC 218 “Rubber and plastics hoses
and hose assemblies” 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 September 2026, and conflicting national standards
shall be withdrawn at the latest by September 2026.
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 3994:2014.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3994:2026 has been approved by CEN as EN ISO 3994:2026 without any modification.

International
Standard
ISO 3994
Fifth edition
Plastics hoses — Helical-
2026-03
thermoplastic-reinforced
thermoplastics hoses for suction
and discharge of aqueous materials
— Specification
Tuyaux en plastiques — Tuyaux thermoplastiques à renforcement
thermoplastique en spirale pour aspiration et refoulement de
matières aqueuses — Spécifications
Reference number
ISO 3994:2026(en) © ISO 2026
ISO 3994:2026(en)
© ISO 2026
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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 3994:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Materials and construction . 2
6 Dimensions and tolerances . 2
6.1 Nominal sizes, inside diameters and tolerances .2
6.2 Length tolerances .3
7 Maximum working pressure . 3
8 Performance requirements . . 3
8.1 Hydrostatic testing at 23 °C ± 2 °C .3
8.2 Hydrostatic testing at 55 °C ± 2 °C .4
8.3 Tensile test .4
8.4 Vacuum test .4
8.5 Reinforcement fracture test .5
8.6 Flexibility at ambient temperature .5
8.7 Flexibility at low temperature .6
8.8 Loss in mass on heating .6
8.9 Exposure to xenon-arc lamp.6
9 Frequency of testing . . 6
10 Marking . . 6
11 Recommendations for packing and storage . 7
12 Test report and test certificate. 7
Annex A (normative) Tensile test . 8
Annex B (normative) Vacuum test . 10
Annex C (normative) Reinforcement fracture test .11
Annex D (normative) Type and routine tests .13
Bibliography . 14

iii
ISO 3994:2026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, Rubber and plastics hoses and hose assemblies, in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 218, Rubber and plastics hoses and
hose assemblies, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This fifth edition cancels and replaces the fourth edition (ISO 3994:2014), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— addition of nominal size 19 in Table 6;
— changes to Table D.1;
— deletion of the production test in Annex E.
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
International Standard ISO 3994:2026(en)
Plastics hoses — Helical-thermoplastic-reinforced
thermoplastics hoses for suction and discharge of aqueous
materials — Specification
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user of this document to establish appropriate health and safety practices
and to determine the applicability of regulatory conditions prior to use.
1 Scope
This document specifies requirements for three types of helical-thermoplastic-reinforced thermoplastics
hoses for suction and discharge of water, weak aqueous chemical solutions and abrasive solids and slurries,
for use in the ambient temperature range from −10 °C to 55 °C.
This document does not specify requirements for use with flammable or combustible materials, nor with
aromatic solvents.
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 176:2005, Plastics — Determination of loss of plasticizers — Activated carbon method
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
...