EN ISO 4023:2009

Rubber hoses and hose assemblies for steam - Test methods (ISO 4023:2009)

ISO 4023:2009 specifies test methods in which a rubber hose test piece or hose assembly is exposed to saturated steam, thus simulating service conditions.
Four methods are specified, namely:
method A: vertical rack method;
method B: horizontal rack method;
method C: flexing test, vertical arrangement;
method D: flexing test, horizontal arrangement.

Gummischläuche und Schlauchleitungen für Dampf - Prüfverfahren (ISO 4023:2009)

In dieser Internationalen Norm werden Prüfverfahren festgelegt, bei denen der von einem Schlauch und/oder einer Schlauchleitung aus Gummi abgeschnittene Probekörper gesättigtem Dampf ausgesetzt wird, um so die Betriebsbedingungen zu simulieren.
Die folgenden vier Verfahren werden festgelegt:
   Verfahren A: Verfahren auf vertikalem Gestell
   Verfahren B: Verfahren auf horizontalem Gestell
   Verfahren C: Biegeprüfung, vertikale Anordnung
   Verfahren D: Biegeprüfung, horizontale Anordnung

Tuyaux et flexibles en caoutchouc pour la vapeur - Méthodes d'essai (ISO 4023:2009)

L'ISO 4023:2009 spécifie des méthodes d'essai dans lesquelles une éprouvette de tuyau et/ou un flexible en caoutchouc sont exposés à de la vapeur saturée, simulant ainsi les conditions d'utilisation.
Quatre méthodes sont spécifiées, à savoir:
méthode A: méthode à support vertical;
méthode B: méthode à support horizontal;
méthode C: essai de flexion, dispositif vertical;
méthode D: essai de flexion, dispositif horizontal.

Gumene cevi in cevni priključki za paro - Preskusne metode (ISO 4023:2009)

Ta mednarodni standard določa preskusne metode, pri katerih je preskusni kos gumene cevi in/ali cevnega priključka izpostavljen nasičeni pari, s čimer se posnemajo obratovalni pogoji. Določene so štiri metode, in sicer: - Metoda A: Metoda s pokončnim stojalom; - Metoda B: Metoda z vodoravnim stojalom; - Metoda C: Preskus gibljivosti, pokončna postavitev; - Metoda D: Preskus gibljivosti, vodoravna postavitev.

General Information

• Status: Published
• Publication Date: 31-Oct-2009
• Withdrawal Date: 30-May-2010
• ICS: 23.040.70 - Hoses and hose assemblies
• Technical Committee: CEN/TC 218 - Rubber and plastics hoses and hose assemblies
• Drafting Committee: CEN/TC 218/WG 4 - Basic specifications and test methods for rubber and plastics hoses, hose assemblies and tubing
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-Nov-2009
• Due Date: 28-Jan-2011
• Completion Date: 01-Nov-2009
• Ref Project: SIST EN ISO 4023:2010 - Rubber hoses and hose assemblies for steam - Test methods (ISO 4023:2009)

Relations

• Replaces: EN ISO 4023:1995 - Rubber hoses for steam - Test methods (ISO 4023:1991)
• Effective Date: 22-Dec-2008

Overview

EN ISO 4023:2009 - Rubber hoses and hose assemblies for steam: Test methods defines standardized laboratory procedures for exposing rubber hose test pieces and complete hose assemblies to saturated steam to simulate real service conditions. The standard specifies four principal steam test methods (vertical and horizontal rack tests and two flexing arrangements) and sets out how to perform the tests, report results and handle common assembly issues such as initial end‑fitting leakage.

Key topics and technical requirements

• Scope: Test methods apply to rubber hoses and hose assemblies subjected to saturated steam; the precise steam pressure, temperature and exposure time for a particular hose type are given in the related product specification (see ISO 6134).
• Four methods specified:
  • Method A - Vertical rack: Test pieces are held vertically while steam passes through.
  • Method B - Horizontal rack: Test pieces are supported horizontally allowing sag and condensate collection.
  • Method C - Flexing test, vertical arrangement: Hoses are flexed in a vertical arrangement under steam exposure.
  • Method D - Flexing test, horizontal arrangement: Flexing under steam with horizontal layout.
• Test specimens: Hoses and hose assemblies must be of minimum length (specified in the standard) and, for assemblies, fitted with the recommended end fittings and couplings.
• Performance checks: Relevant product standards (e.g., ISO 6134) normally specify which physical properties to measure after exposure - commonly bursting strength, tensile strength, elongation at break, layer adhesion, and visually assessed criteria (cracking, blistering, reinforcement rupture). Some standards allow the time to failure as a criterion.
• End‑fitting leakage: Initial tightening to stop slight initial leakage is permitted (unless forbidden by the product standard); further tightening to stop later leakage is not allowed - such leakage constitutes test failure.
• Reporting requirements: Test reports must include a full description of the test piece, reference to EN ISO 4023:2009 (method used), applicable acceptance criteria, visual assessments, measured physical results, time to failure (if applicable) and special observations.

Practical applications

• Quality control and acceptance testing of steam hoses used in steam systems
• Type approval and validation of hose assemblies and end fittings
• Product development and comparative endurance testing under simulated steam service
• Failure analysis and forensic testing after in-service problems

Who uses this standard

• Hose manufacturers and assemblers
• Independent testing laboratories and certification bodies
• Maintenance and procurement engineers in industries using steam (power generation, chemical and petrochemical, food processing, heating systems)
• Standards committees and compliance officers

Related standards

• ISO 6134 - Rubber hoses and hose assemblies for saturated steam - Specification (referenced for test conditions and acceptance criteria)

Keywords: EN ISO 4023:2009, rubber hoses, hose assemblies, steam test methods, saturated steam, vertical rack, horizontal rack, flexing test, hose testing, ISO 6134.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2010
1DGRPHãþD
SIST EN ISO 4023:2002
*XPHQHFHYLLQFHYQLSULNOMXþNL]DSDUR3UHVNXVQHPHWRGH,62
Rubber hoses and hose assemblies for steam - Test methods (ISO 4023:2009)
Gummischläuche und -schlauchleitungen für Dampf - Prüfverfahren (ISO 4023:2009)
Tuyaux et flexibles en caoutchouc pour la vapeur - Méthodes d'essai (ISO 4023:2009)
Ta slovenski standard je istoveten z: EN ISO 4023:2009
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 4023
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2009
ICS 23.040.70 Supersedes EN ISO 4023:1995
English Version
Rubber hoses and hose assemblies for steam - Test methods
(ISO 4023:2009)
Tuyaux et flexibles en caoutchouc pour la vapeur - Gummischläuche und -schlauchleitungen für Dampf -
Méthodes d'essai (ISO 4023:2009) Prüfverfahren (ISO 4023:2009)
This European Standard was approved by CEN on 7 October 2009.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4023:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 4023:2009) 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 May 2010, and conflicting national standards shall be withdrawn at the
latest by May 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4023:1995.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 4023:2009 has been approved by CEN as a EN ISO 4023:2009 without any modification.

INTERNATIONAL ISO
STANDARD 4023
Fourth edition
2009-11-01
Rubber hoses and hose assemblies
for steam — Test methods
Tuyaux et flexibles en caoutchouc pour la vapeur — Méthodes d'essai

Reference number
ISO 4023:2009(E)
©
ISO 2009
ISO 4023:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 4023:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Method A: Vertical rack method .1
3.1 Principle.1
3.2 Apparatus.2
3.3 Test piece .2
3.4 Procedure.2
3.5 Test report.4
4 Method B: Horizontal rack method.4
4.1 Principle.4
4.2 Apparatus.4
4.3 Test piece .5
4.4 Procedure.5
4.5 Test report.6
5 Method C: Flexing test, vertical arrangement .6
5.1 Principle.6
5.2 Apparatus.6
5.3 Test piece .6
5.4 Procedure.7
5.5 Test report.8
6 Method D: Flexing test, horizontal arrangement.8
6.1 Principle.8
6.2 Apparatus.9
6.3 Test piece .9
6.4 Procedure.9
6.5 Test report.11

ISO 4023:2009(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 4023 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 1, Hoses (rubber and plastics).
This fourth edition cancels and replaces the third edition (ISO 4023:1991), which has been technically revised.
The major technical change is the broadening of the scope to include hose assemblies. These have to be
fitted with suitable end connections and couplings as, for a particular hose design, the type of end connection
used can have a significant influence on the test results.
A procedure for dealing with any initial leakage between hose body and end fitting which sometimes occurs at
the start of the test is also included.

iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 4023:2009(E)

Rubber hoses and hose assemblies for steam — Test methods
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This standard does not purport to address all of 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.
All necessary safety devices shall be provided to ensure safe working conditions for the operators.
1 Scope
This International Standard specifies test methods in which a rubber hose test piece or hose assembly is
exposed to saturated steam, thus simulating service conditions.
Four methods are specified, namely:
⎯ method A: vertical rack method;
⎯ method B: horizontal rack method;
⎯ method C: flexing test, vertical arrangement;
⎯ method D: flexing test, horizontal arrangement.
2 Normative references
The following referenced documents are indispensable for the application 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 6134, Rubber hoses and hose assemblies for saturated steam — Specification
3 Method A: Vertical rack method
3.1 Principle
A length of hose or hose assembly is held in a fixed vertical position and saturated steam is passed through it.
NOTE The temperature or pressure of the steam and the time of exposure are given in ISO 6134 for each particular
hose type. The relevant hose product standard will normally state which, if any, physical properties are to be used to
check for hose deterioration as well as the permitted changes in these properties. Properties commonly specified are
bursting strength, tensile strength, elongation at break of the lining and/or cover and adhesion between layers. Visually
assessed test criteria may also be specified, for example rupture of reinforcement, cracking of cover to a specified depth
and pitting or blistering of the lining. Sometimes, the time of exposure until the hose fails may be specified as the test
criterion.
For hose assemblies, the check is carried out as for hoses but, in addition, it is recorded in the test report
whether there is any failure or leakage at the end-fitting-to-hose interface.
ISO 4023:2009(E)
3.2 Apparatus
Refer to Figure 1. Two fixed horizontal steam manifolds having suitable connections for attaching test pieces
are placed one above the other at such a distance that the test pieces will just fit between the connections in a
vertical position without distortion. Dry saturated steam at the required pressure is supplied to the test pieces
through the upper manifold, which is equipped with a pressure-regulating valve, a recording gauge and one or
more suitable indicating gauges. The lower manifold is connected to a steam trap. Shut-off valves are
provided at each opening in each manifold.
Should the apparatus be confined within an enclosure as a safety precaution, the enclosure shall be designed
so that the ambient temperature measured 25 mm from the outer surface of the hose is not more than 11 °C
above room temperature.
3.3 Test piece
3.3.1 Hoses
The test piece shall be a sample of hose, not less than 500 mm in length, and of a length sufficient to allow
coupling removal after the steam test and recoupling the hose with an appropriate coupling for a burst test.
3.3.2 Hose assemblies
The test piece for the hose assembly shall be not less than 500 mm in length and shall be fitted with the
recommended or specified end fittings.
3.4 Procedure
Mount the test piece in the apparatus and subject it to the internal steam conditions specified in ISO 6134 for
the particular type of hose under test. After exposure for the time specified in ISO 6134 for the particular type
of hose under test, release the pressure in the test piece, remove it from the apparatus, allow it to cool and
hold it under atmospheric conditions for not less than 16 h and not more than 100 h.
After this time, examine the test piece visually and carry out the physical determinations specified; at the same
time, determine the same properties on a length of hose or a hose assembly which has not been exposed. In
the case of hose assemblies, if a burst test is specified in the relevant product standard the complete hose
assembly shall be removed from the apparatus to carry out the test.
If so specified, the exposure shall be continued until the hose or hose assembly fails, as indicated by the
specified criteria, and the time to failure noted. These specified criteria will be stated in the relevant hose
product standard.
Normally, at the start of the test, tightening of the hose end fittings to stop initial slight leakage between end
fitting and hose body is allowed, unless the hose product standard explic
...