Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections (ISO 19879:2010)

This International Standard 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 International Standard does not apply to the testing of hydraulic quick-action couplings, which is covered by ISO 7241-2. Tests outlined in this International Standard are independent of each other and document the method to follow for each test. See the appropriate component International Standard for which tests to conduct and for performance criteria. For qualification of the connector, the minimum number of samples specified in this International Standard 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 in der Fluidtechnik (ISO 19879:2010)

Diese Internationale Norm legt einheitliche Verfahren für die Prüfung und die Bewertung von metallischen
Rohrverbindungen, Einschraubzapfen und Flanschverbindungen für Hydraulikanwendungen fest. Diese
Internationale Norm gilt nicht für die Prüfung von Hydraulik-Schnellkupplungen, die in ISO 7241-2 festgelegt
ist.
Die in dieser Internationalen Norm festgelegten Prüfungen sind voneinander unabhängig und beschreiben das
für die jeweilige Prüfung durchzuführende Verfahren; Prüfanforderungen und Leistungskriterien sind in der
jeweiligen Internationalen Norm über das entsprechende Bauteil enthalten.
Für den Eignungsnachweis der Verbindungsteile muss die in dieser Internationalen Norm festgelegte
Mindestanzahl an Proben einer Prüfung unterzogen werden, 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 19879:2010)

L'ISO 19879:2010 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. L'ISO 19879:2010 ne s'applique pas aux essais des raccords rapides pour transmissions hydrauliques, qui font l'objet de l'ISO 7241-2.
Les essais décrits dans l'ISO 19879:2010 sont indépendants les uns des autres et documentent la méthode à suivre pour chaque essai; pour 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 l'ISO 19879:2010 doit être soumis à l'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 19879:2010)

Ta mednarodni standard določa enotne metode za preskus in vrednotenje delovanja kovinskih cevastih povezav, stojnih vijakov za kanale ter prirobničnih spojev za hidravlične omrežne priključke. Ta mednarodni standard se ne uporablja za preskušanje hitro delujočih hidravličnih spojev, ki so zajeti v standardu ISO 7241-2. Preskusi, ki so navedeni v tem mednarodnem standardu, niso medsebojno odvisni in navajajo metodo, ki se upošteva pri vsakem posameznem preskusu. Za preskuse, ki jih je treba izvesti, in merila učinkovitosti glejte ustrezni del mednarodnega standarda. Za kvalifikacijo konektorja se preskusi najmanjše število vzorcev, ki ga določa ta mednarodni standard, razen če je drugače navedeno v ustreznem standardu za konektorje ali dogovorjeno med proizvajalcem in uporabnikom.

General Information

Status
Withdrawn
Publication Date
08-Jul-2012
Withdrawal Date
15-Apr-2021
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
08-Apr-2021
Due Date
01-May-2021
Completion Date
16-Apr-2021

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SLOVENSKI STANDARD
SIST EN ISO 19879:2012
01-september-2012
1DGRPHãþD
SIST EN ISO 19879:2005
SIST EN ISO 19879:2005/AC:2009
.RYLQVNLFHYQLSULNOMXþNL]DIOXLGQRWHKQLNRLQVSORãQRXSRUDER3UHVNXVQH
PHWRGH]DKLGUDYOLþQHRPUHåQHSULNOMXþNH ,62

Metallic tube connections for fluid power and general use - Test methods for hydraulic

fluid power connections (ISO 19879:2010)
Metallische Rohrverschraubungen für Fluidtechnik und allgemeine Anwendung -
Prüfverfahren für hydraulische Rohrverschraubungen in der Fluidtechnik (ISO
19879:2010)
Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et
applications générales - Méthodes d'essai pour raccords pour transmissions
hydrauliques (ISO 19879:2010)
Ta slovenski standard je istoveten z: EN ISO 19879:2010
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
SIST EN ISO 19879:2012 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 19879:2012
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SIST EN ISO 19879:2012
EUROPEAN STANDARD
EN ISO 19879
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2010
ICS 23.040.60; 23.100.40 Supersedes EN ISO 19879:2005
English Version
Metallic tube connections for fluid power and general use - Test
methods for hydraulic fluid power connections (ISO 19879:2010)

Raccords de tubes métalliques pour transmissions Metallische Rohrverschraubungen für Fluidtechnik und

hydrauliques et pneumatiques et applications générales - allgemeine Anwendung - Prüfverfahren für hydraulische

Méthodes d'essai pour raccords pour transmissions Rohrverschraubungen in der Fluidtechnik (ISO 19879:2010)

hydrauliques (ISO 19879:2010)
This European Standard was approved by CEN on 14 September 2010.

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, Croatia, 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

© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19879:2010: E

worldwide for CEN national Members.
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SIST EN ISO 19879:2012
EN ISO 19879:2010 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 19879:2012
EN ISO 19879:2010 (E)
Foreword

The text of ISO 19879:2010 has been prepared by Technical Committee ISO/TC 131 “Fluid power systems” of

the International Organization for Standardization (ISO) and has been taken over as EN ISO 19879:2010 by

Technical Committee ECISS/TC EC110 “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 March 2011, and conflicting national standards shall be withdrawn at

the latest by March 2011.

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 19879:2005.

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, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
Endorsement notice

The text of ISO 19879:2010 has been approved by CEN as a EN ISO 19879:2010 without any modification.

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SIST EN ISO 19879:2012
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SIST EN ISO 19879:2012
INTERNATIONAL ISO
STANDARD 19879
Second edition
2010-09-15
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 19879:2010(E)
ISO 2010
---------------------- Page: 7 ----------------------
SIST EN ISO 19879:2012
ISO 19879:2010(E)
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© ISO 2010

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing 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 2010 – All rights reserved
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 General requirements ...........................................................................................................................2

5 Repeated assembly test........................................................................................................................6

6 Leakage test...........................................................................................................................................6

7 Proof test................................................................................................................................................7

8 Burst test................................................................................................................................................9

9 Cyclic endurance test ...........................................................................................................................9

10 Vacuum test .........................................................................................................................................10

11 Overtightening test..............................................................................................................................11

12 Vibration test........................................................................................................................................11

13 Cyclic endurance (impulse) test with vibration................................................................................14

14 Identification statement (Reference to this International Standard)...................................................15

Annex A (normative) Test data form...............................................................................................................16

Bibliography......................................................................................................................................................19

© ISO 2010 – All rights reserved iii
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SIST EN ISO 19879:2012
ISO 19879:2010(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 19879 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4,

Connectors and similar products and components.

This second edition of ISO 19879 cancels and replaces the first edition (ISO 19879:2005) of which it

constitutes a minor revision, with minor changes to 10.1, 10.2 (Table 7) and 12.2.2. (It also incorporates the

Technical Corrigendum ISO 19879:2005/Cor. 1:2007.)
iv © ISO 2010 – All rights reserved
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
Introduction

In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an

enclosed circuit. It is required 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 compliance with the stated requirements.

© ISO 2010 – All rights reserved v
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SIST EN ISO 19879:2012
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SIST EN ISO 19879:2012
INTERNATIONAL STANDARD ISO 19879:2010(E)
Metallic tube connections for fluid power and general use —
Test methods for hydraulic fluid power connections

WARNING — Some of the tests described in this International Standard 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.
1 Scope

This International Standard 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

International Standard does not apply to the testing of hydraulic quick-action couplings, which is covered by

ISO 7241-2.

Tests outlined in this International Standard are independent of each other and document the method to follow

for each test. See the appropriate component International Standard for which tests to conduct and for

performance criteria.

For qualification of the connector, the minimum number of samples specified in this International Standard 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 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 48, Rubber, vulcanized or thermoplastic — Determination of hardness (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 (all parts), Metallic materials — Rockwell hardness test
ISO 6605, Hydraulic fluid power — Hoses and hose assemblies — Test methods

ISO 6743-4, Lubricants, industrial oils and related products (class L) — Classification — Part 4: Family H

(Hydraulic systems)
© ISO 2010 – All rights reserved 1
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5598 apply.

4 General requirements
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 (for repeated assembly, leakage, proof, burst and cyclic endurance tests), and

Type 2 test assemblies shall be as shown in Figure 2 for male stud ends (for leakage, proof and, if specified,

burst and cyclic endurance tests). 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, connector end and sealing method is optional
A Straight stud connector
but shall be recorded in the test report.
The required tube wall thickness shall be selected according to the

B Metallic tube working pressure rating of the respective connector. The length of

the tube shall be five times the tube outside diameter plus 50 mm.
Shaped connector, with swivel,
C –––
if applicable
D Blanking end (cap or plug) –––
Shaped connector with
E –––
adjustable stud end
F Flange connector –––
G Sealing e.g. O-ring.
2 © ISO 2010 – All rights reserved
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
Key
1 swivel nut
A straight stud connector
B metallic tube
C shaped connector
D blanking end (cap or plug)
G sealing, e.g. O-ring
L = 5 × the tube OD (in millimetres) + 50 mm.
Figure 1 — Test assembly for tube connection — Type 1

a) Non-adjustable stud end connection b) Adjustable stud end connection, with shaped

connector, if applicable
Key
A straight stud connector
D blanking end (cap or plug)
E shaped connector with adjustable stud end
G sealing, e.g. O-ring
Figure 2 — Test assembly for stud end — Type 2
© ISO 2010 – All rights reserved 3
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
Key
1 swivel nut
C shaped connector with swivel
D blanking end (cap or plug)
E shaped connector with adjustable stud end
G sealing, e.g. O-ring
Figure 3 — Alternate connector capability test assembly without tube — Type 3
Key
1 O-ring seal 5 test adapter
2 split-flange clamp F flange connector
3 screw
4 washer
This end capped or plugged.
Figure 4 — Test assembly for flange connectors — Type 4
4 © ISO 2010 – All rights reserved
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
4.2 Test equipment
4.2.1 Test block

Test blocks shall be unplated and have a hardness between 35 HRC and 45 HRC in accordance with

ISO 6508. For a test block with multiple ports, the distance between the centrelines of test ports shall be a

minimum of 1,5 times the port diameter. The distance between the port centreline and the edge of the test

block shall be a minimum of 1 times the port diameter.
4.2.2 Test seals

For all tests, except for the overtightening test and unless otherwise specified, seals shall be nitrile (NBR)

rubber with a hardness of (90 ± 5) IHRD when measured in accordance with ISO 48. Seals shall conform to

their respective dimensional requirements, and O-rings shall meet or exceed the quality requirements for

grade N (general purpose) of ISO 3601-3, if applicable.
4.3 Procedure
4.3.1 Thread lubrication

For all tests, on connectors made of carbon steel and for testing only, threads and contact surfaces shall be

lubricated prior to application of torque using a hydraulic fluid with a viscosity of ISO VG 32 in accordance with

ISO 3448. For connectors made of materials other than carbon steel, the manufacturer's recommendation for

thread lubrication shall be followed.
4.3.2 Torque

For all tests, except the repeated assembly and overtightening tests, tube connections and stud ends shall be

tested at the required minimum torques or number of hex flats or turns from finger-tight position given in the

respective connector standard, if specified. Otherwise, they shall be tested at the minimum torque values or

number of hex flats or turns from finger-tight position supplied by the manufacturer. For test assembly, type 2

and type 3 adjustable stud torques shall be applied after being backed out one full turn from finger-tight, in

order to test correctly the worst possible actual assembly conditions.
4.3.3 Temperature

For all tests, the temperature of the hydraulic fluid shall be between 15 °C and 80 °C, unless otherwise

specified in the respective connector standard.
4.4 Test report

Test results and test conditions shall be reported on the test data form given in Annex A.

NOTE ISO/TR 11340 provides a method of reporting leakage.
© ISO 2010 – All rights reserved 5
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SIST EN ISO 19879:2012
ISO 19879:2010(E)
5 Repeated assembly test
5.1 Principle

Unless otherwise specified in the respective connector standard, three type 1 test assemblies shall be tested

to confirm that they are capable of meeting the necessary requirements after being disassembled and

re-assembled several times.
5.2 Procedure

The tube connections of the straight stud connector (part A in Figure 1) and shaped connector (part C in

Figure 1) shall be disassembled and re-assembled six times. Prior to each re-assembly, the tube shall be

turned clockwise by 60°. On re-assembly, the nuts shall be tightened firmly, using the maximum torque values

or number of turns given in the respective connector standard or by the manufacturer. All assemblies, after the

first and sixth re-assembly, shall be subjected to a leakage test (Clause 6) and a proof test (Clause 7) at the

test parameters specified in Table 2.
Table 2 — Parameters and procedure for repeated assembly test
Test parameter Value of parameter and procedure
Test medium
Test pressure As specified in Clauses 6 and 7.
Test duration
Any leakage during the leakage and proof tests shall be
Pass/fail criterion
considered a failure.
5.3 Re-use of components

Parts that pass this test may be used for burst and cycle endurance tests at the minimum specified assembly

torque or number of turns. They shall not be used for actual service or returned to stock.

6 Leakage test
6.1 Principle

Unless otherwise specified in the respective connector standard, all type 1 test assemblies from the repeated

assembly test and three each of type 2, type 3 and type 4 assemblies (where applicable) shall be subjected to

...

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