EN ISO 19879:2021

Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections (ISO 19879:2021)

This document specifies uniform methods for the testing and performance evaluation of metallic tube connections, stud ends for ports and flange connections for use in hydraulic fluid power applications. This document does not apply to the testing of hydraulic quick-action couplings, which is covered by ISO 18869.
Tests outlined in this document are independent of each other and document the method to follow for each test. See the appropriate component International Standard for indications of which tests to conduct and for performance criteria.
For qualification of the connector, the minimum number of samples specified in this document is tested, unless otherwise specified in the relevant connector standard or as agreed upon by the manufacturer and the user.

Metallische Rohrverschraubungen für Fluidtechnik und allgemeine Anwendung - Prüfverfahren für hydraulische Rohrverschraubungen (ISO 19879:2021)

Dieses Dokument legt einheitliche Verfahren für die Prüfung und die Bewertung von metallischen Rohrverbindungen, Einschraubzapfen und Flanschverbindungen für Hydraulikanwendungen fest. Dieses Dokument ist nicht anzuwenden für die Prüfung von Hydraulik-Schnellkupplungen, die in ISO 18869 festgelegt sind.
Die in diesem Dokument festgelegten Prüfungen sind voneinander unabhängig und beschreiben das für die jeweilige Prüfung durchzuführende Verfahren. Hinweise zu Prüfanforderungen und Leistungskriterien sind in der jeweiligen Internationalen Norm über das entsprechende Bauteil enthalten.
Für den Eignungsnachweis der Verbindungsteile wird die in diesem Dokument festgelegte Mindestanzahl an Proben einer Prüfung unterzogen, sofern in der entsprechenden Norm über die Verbindungsteile nichts anderes festgelegt ist oder zwischen Hersteller und Anwender vereinbart wurde.

Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et applications générales - Méthodes d'essai pour raccords pour transmissions hydrauliques (ISO 19879:2021)

Le présent document spécifie des méthodes uniformes pour les essais et l'évaluation des performances des raccordements de tube métalliques, des éléments mâles pour orifices et des brides de raccordement destinés à être utilisés dans les applications de transmissions hydrauliques. Le présent document ne s'applique pas aux essais des raccords rapides pour transmissions hydrauliques, qui font l'objet de l'ISO 18869.
Les essais décrits dans le présent document sont indépendants les uns des autres et documentent la méthode à suivre pour chaque essai.  Pour des indications concernant les exigences d'essai et les critères de performance, se référer à la Norme internationale appropriée couvrant le composant.
Pour la qualification du connecteur, le nombre minimal d'échantillons spécifiés dans le présent document doit être soumis à essai, sauf spécification contraire dans la norme de connecteurs appropriée ou accord entre le fabricant et l'utilisateur.

Kovinski cevni priključki za fluidno tehniko in splošno uporabo - Preskusne metode za hidravlične omrežne priključke (ISO 19879:2021)

General Information

• Status: Published
• Publication Date: 30-Mar-2021
• Withdrawal Date: 29-Sep-2021
• ICS: 23.040.60 - Flanges, couplings and joints
• ICS: 23.100.40 - Piping and couplings
• Technical Committee: ECISS/TC 110 - Steel tubes, and iron and steel fittings
• Drafting Committee: ECISS/TC 110 - Steel tubes, and iron and steel fittings
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 31-Mar-2021
• Completion Date: 31-Mar-2021
• Ref Project: SIST EN ISO 19879:2021 - Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections (ISO 19879:2021)

Relations

• Replaces: EN ISO 19879:2010 - Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections (ISO 19879:2010)
• Effective Date: 04-May-2016

Overview

EN ISO 19879:2021 - "Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections" - is the CEN-adopted version of ISO 19879:2021. It specifies uniform, standalone test methods and procedures for evaluating the performance of metallic tube connections, stud ends for ports and flange connections used in hydraulic fluid power systems. Tests are independent and the applicable tests and performance criteria are indicated in the relevant component International Standard. Quick-action (quick‑release) couplings are excluded (see ISO 18869).

Key topics and requirements

• Scope and exclusions: Applies to metallic tube connections, stud ends and flanges for hydraulic fluid power; excludes hydraulic quick-action couplings.
• Test independence: Each test is described as an independent method - the appropriate component standard determines which tests are required for qualification.
• Minimum sample requirements: Qualification is performed using the minimum number of samples specified in this document unless the relevant connector standard or the manufacturer and user agree otherwise.
• General test provisions:
  • Test assemblies and test equipment (including test blocks and test seals)
  • Procedure controls such as thread lubrication, torque, temperature
  • Test report requirements and typical data recording (informative annex with sample form)
• Standardized test methods (documented principles and procedures):
  • Repeated assembly test
  • Leakage test
  • Proof test
  • Burst test
  • Cyclic endurance test
  • Vacuum test
  • Overtightening test
  • Vibration test
  • Cyclic endurance (impulse) combined with vibration

Practical applications

• Product qualification and type testing for metallic hydraulic fittings, flanges and stud ends.
• Quality control and production testing in manufacturing plants to verify assembly and sealing performance under specified conditions.
• Independent testing laboratories use these methods to produce repeatable, comparable results for customers and regulatory bodies.
• Design and R&D teams apply the tests during development to validate durability, leak tightness and mechanical strength.
• Purchasers, specifiers, and OEMs reference this standard in procurement and system specifications to ensure connector compatibility with hydraulic system requirements.

Who should use it

• Manufacturers of metallic tube connections, fittings and flanges
• Test houses and certification bodies
• Hydraulic system designers and OEM engineers
• Quality assurance and compliance teams
• Procurement specialists specifying hydraulic connectors

Related standards

• ISO 18869 - hydraulic quick-action couplings (exclusion/alternate)
• Relevant component International Standards for specific connector types (indicate which tests and performance criteria to run)

Keywords: EN ISO 19879:2021, metallic tube connections, hydraulic fluid power, test methods, leakage test, burst test, cyclic endurance, vibration test, hydraulic connectors, tube fittings testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2021
Nadomešča:
SIST EN ISO 19879:2012
Kovinski cevni priključki za fluidno tehniko in splošno uporabo - Preskusne
metode za hidravlične omrežne priključke (ISO 19879:2021)
Metallic tube connections for fluid power and general use - Test methods for hydraulic
fluid power connections (ISO 19879:2021)
Metallische Rohrverschraubungen für Fluidtechnik und allgemeine Anwendung -
Prüfverfahren für hydraulische Rohrverschraubungen in der Fluidtechnik (ISO
19879:2021)
Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et
applications générales - Méthodes d'essai pour raccords pour transmissions
hydrauliques (ISO 19879:2021)
Ta slovenski standard je istoveten z: EN ISO 19879:2021
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 19879
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 23.040.60; 23.100.40 Supersedes EN ISO 19879:2010
English Version
Metallic tube connections for fluid power and general use -
Test methods for hydraulic fluid power connections (ISO
19879:2021)
Raccords de tubes métalliques pour transmissions Metallische Rohrverschraubungen für Fluidtechnik
hydrauliques et pneumatiques et applications und allgemeine Anwendung - Prüfverfahren für
générales - Méthodes d'essai pour raccords pour hydraulische Rohrverschraubungen in der
transmissions hydrauliques (ISO 19879:2021) Fluidtechnik (ISO 19879:2021)
This European Standard was approved by CEN on 4 March 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 19879:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 19879:2021) has been prepared by Technical Committee ISO/TC 131 "Fluid
power systems" in collaboration with Technical Committee CEN/TC 459/SC 10 “Steel tubes, and iron
and steel fittings” the secretariat of which is held by UNI.
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 2021, and conflicting national standards
shall be withdrawn at the latest by September 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 19879:2010.
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 19879:2021 has been approved by CEN as EN ISO 19879:2021 without any modification.

INTERNATIONAL ISO
STANDARD 19879
Third edition
2021-03
Metallic tube connections for fluid
power and general use — Test
methods for hydraulic fluid power
connections
Raccords de tubes métalliques pour transmissions hydrauliques et
pneumatiques et applications générales — Méthodes d'essai pour
raccords pour transmissions hydrauliques
Reference number
ISO 19879:2021(E)
©
ISO 2021
ISO 19879:2021(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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 19879:2021(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General requirements . 2
4.1 Test assemblies . 2
4.2 Test equipment . 5
4.2.1 Test block. 5
4.2.2 Test seals . 5
4.3 Procedure . 5
4.3.1 Thread lubrication . . 5
4.3.2 Torque . 6
4.3.3 Temperature . 6
4.4 Test report . 6
5 Repeated assembly test . 6
5.1 Principle . 6
5.2 Procedure . 6
5.3 Re-use of components . 6
6 Leakage test . 7
6.1 Principle . 7
6.2 Procedure . 7
6.3 Re-use of components . 7
7 Proof test . 8
7.1 Principle . 8
7.2 Procedure . 8
7.3 Re-use of components . 8
8 Burst test. 9
8.1 Principle . 9
8.2 Procedure . 9
8.3 Re-use of components . 9
9 Cyclic endurance test . 9
9.1 Principle . 9
9.2 Procedure . 9
9.3 Re-use of components . 9
10 Vacuum test .10
10.1 Principle .10
10.2 Procedure .10
10.3 Re-use of components .10
11 Overtightening test .10
11.1 Principle .10
11.2 Test equipment .11
11.3 Procedure .11
11.4 Re-use of components .11
12 Vibration test .11
12.1 Principle .11
12.2 Procedure .11
12.3 Re-use of components .14
13 Cyclic endurance (impulse) test with vibration .14
ISO 19879:2021(E)
13.1 Principle .14
13.2 Procedure .14
13.3 Re-use of components .15
14 Identification statement (Reference to this document) .15
Annex A (informative) Typical test data form .16
Bibliography .19
iv © ISO 2021 – All rights reserved

ISO 19879:2021(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 131, Fluid power systems, Subcommittee
SC 4, Connectors and similar products and components, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 459/SC 10, Steel tubes, and iron and steel fittings,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 19879:2010), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— clarification of the language used to describe the connector end, and of the proper method for
selecting tubes for test assemblies;
— minor changes to 10.1, 10.2 (Table 7) and 12.2.2.
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.
ISO 19879:2021(E)
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure
within an enclosed circuit. It is suggested that components be designed to meet these requirements
under varying conditions. Testing of components to meet performance requirements provides a basis
of assurance for determining design application and for checking component conformance with the
stated requirements.
vi © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 19879:2021(E)
Metallic tube connections for fluid power and general
use — Test methods for hydraulic fluid power connections
1 Scope
This document specifies uniform methods for the testing and performance evaluation of metallic tube
connections, stud ends for ports and flange connections for use in hydraulic fluid power applications.
This document does not apply to the testing of hydraulic quick-action couplings, which is covered by
ISO 18869.
Tests outlined in this document are independent of each other and document the method to follow
for each test. See the appropriate component International Standard for indications of which tests to
conduct and for performance criteria.
For qualification of the connector, the minimum number of samples specified in this document is tested,
unless otherwise specified in the relevant connector standard or as agreed upon by the manufacturer
and the user.
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 48-2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between
10 IRHD and 100 IRHD
ISO 3448, Industrial liquid lubricants — ISO viscosity classification
ISO 3601-3, Fluid power systems — O-rings — Part 3: Quality acceptance criteria
ISO 5598, Fluid power systems and components — Vocabulary
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 6605, Hydraulic fluid power — Test methods for hoses and hose assemblies
ISO 6743-4, Lubricants, industrial oils and related products (class L) — Classification — Part 4: Family H
(Hydraulic systems)
ISO 10763, Hydraulic fluid power — Plain-end, seamless and welded precision steel tubes — Dimensions
and nominal working pressures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
ISO 19879:2021(E)
4 General requirements
WARNING — Some of the tests described in this document are considered hazardous. It is,
therefore, essential that, in conducting these tests, all appropriate safety precautions be strictly
adhered to. Attention is drawn to the danger of burst, fine jets (which can penetrate the skin)
and energy release of expanding gases. To reduce the hazard of energy release, bleed air out of
test specimens prior to pressure testing. Tests shall be set up and performed by properly trained
personnel, utilizing appropriate personal protective equipment (PPE).
4.1 Test assemblies
All components tested shall be in the final form, including annealed nuts, as required for brazed
components. Unless otherwise specified in the respective connector standard, Type 1 test assemblies
shall be as shown in Figure 1 for tube connections, and Type 2 test assemblies shall be as shown in
Figure 2 for male stud ends. Alternatively, in order to test the connector to its full capability, use of
the metallic tube may be omitted for burst and cyclic endurance tests, and different configurations
with similar capability may be combined in a test assembly Type 3, as shown in Figure 3. Type 4 test
assemblies for flange connectors shall be as shown in Figure 4. Test assemblies shall conform to the
relevant requirements given in Table 1.
Table 1 — Requirements for test assemblies
Part code Part name Description and further information
The type of stud end, tube-connector end and sealing method
A Straight stud connector
is optional but shall be recorded in the test report.
The required tube wall thickness shall be selected according
to the working pressure rating of the respective connec-
tor. The working pressure of the tube in accordance with
B Metallic tube
ISO 10763 shall be equal to or slightly greater than the work-
ing pressure of the respective connector. The length of the
tube shall be five times the tube outside diameter plus 50 mm.
Shaped connector, with
C —
swivel, if applicable
D Blanking end (cap or plug) —
Shaped connector with
E —
adjustable stud end
F Flange connector —
G Sealing e.g. O-
...