1、January 2011 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 23.100.40!$lK“1739640www.din.deDDIN EN ISO 19879Metallic tube connections for fluid power and general use Test methods for hydraulic fluid power connections (ISO 19879:2010)English translation of DIN EN ISO 19879:2011-01Metallische Rohrverschraubungen fr Fluidtechnik und allgemeine Anwendung Prfve
3、rfahren fr hydraulische Rohrverschraubungen in der Fluidtechnik(ISO 19879:2010)Englische bersetzung von DIN EN ISO 19879:2011-01Raccords de tubes mtalliques pour transmissions hydrauliques et pneumatiques etapplications gnrales Mthodes dessai pour raccords pour transmissions hydrauliques (ISO 19879:
4、2010)Traduction anglaise de DIN EN ISO 19879:2011-01SupersedesDIN EN ISO 19879:2005-10 andDIN EN ISO 19879 www.beuth.deDocument comprises 28 pagesIn case of doubt, the German-language original shall be considered authoritative.Corrigendum 1:2009-090 .11 2DIN EN ISO 19879:2011-01 2 A comma is used as
5、 the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 131 “Fluid power systems” (Secretariat: ANSI, USA), SC 4 “Connectors and similar products and components” (Secretariat: ANSI, USA) and has been adopted without modifications as EN ISO 19879:2010 by T
6、echnical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” (Secretariat: UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Piping and Boiler Plant Standards Committee), Working Committee NA 082-00-07 AA
7、Rohrverschraubungen. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 48 DIN ISO 48 ISO 3448 DIN ISO 3448 ISO 3601-3 DIN ISO 3601-3 ISO 6508 DIN EN ISO 6508 ISO 6743-4 DIN EN ISO 6743-4 Amendments This standard differs from DIN EN ISO 19
8、879:2005-10 and DIN EN ISO 19879 Corrigendum 1:2009-09 as follows: a) a warning note has been added before Clause 1 “Scope”; b) in Subclause 10.1, it has been specified that, during the vacuum test, the type test assemblies shall be capable of withstanding a vacuum of 6,5 kPa absolute pressure for a
9、 minimum of 5 min without leakage; c) in Subclause 10.2, Table 7, the test duration has been changed to a minimum of 5 min; d) in Subclause 12.2.2, the reference to the figure has been corrected: the strain gauge is to be installed at the location specified in Figure 7. Previous editions DIN 3859-3:
10、 1995-12 DIN EN ISO 19879: 2005-10 DIN EN ISO 19879 Corrigendum 1: 2009-09 DIN EN ISO 19879:2011-01 3 National Annex NA (informative) Bibliography DIN EN ISO 6508 (all parts), Metallic materials Rockwell hardness test DIN EN ISO 6743-4, Lubricants, industrial oils and related products (class L) Clas
11、sification Part 4: Family H (Hydraulic systems) DIN ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) DIN ISO 3448, Industrial liquid lubricants ISO viscosity classification DIN ISO 3601-3, Fluid power systems O-Rings Part 3: Quality accept
12、ance criteria DIN EN ISO 19879:2011-01 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19879 September 2010 ICS 23.040.60; 23.100.40 Supersedes EN ISO 19879:2005English Version Metallic tube connections for fluid power and general use - Test methods for hy
13、draulic fluid power connections (ISO 19879:2010)Raccords de tubes mtalliques pour transmissions hydrauliques et pneumatiques et applications gnrales - Mthodes dessai pour raccords pour transmissions hydrauliques (ISO 19879:2010) Metallische Rohrverschraubungen fr Fluidtechnik und allgemeine Anwendun
14、g - Prfverfahren fr hydraulische Rohrverschraubungen in der Fluidtechnik (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 sta
15、tus 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).
16、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, Cze
17、ch 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 COMIT EUR
18、OPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 19879:2010: EContents DIN EN ISO 19879:2011-01 EN ISO 19879:2010 (E)
19、 2 Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 General requirements6 5 Repeated assembly test10 6 Leakage test .10 7 Proof test 11 8 Burst test 13 9 Cyclic endurance test13 10 Vacuum test14 11 Overtightening test15 12 Vibration test15 13 Cyclic endu
20、rance (impulse) test with vibration18 14 Identification statement (Reference to this International Standard) .19 Annex A (normative) Test data form .20 Bibliography 23 Foreword The text of ISO 19879:2010 has been prepared by Technical Committee ISO/TC 131 “Fluid power systems” of the International O
21、rganization for Standardization (ISO) and has been taken over as EN ISO 19879:2010 by 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 withdr
22、awn 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
23、 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,
24、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. DIN EN ISO 19879:2011-0
25、1 EN ISO 19879:2010 (E) 3 Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” the secretariat of which is held by UNI. Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. It is required
26、 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. DIN EN ISO 19879:2011-01 EN IS
27、O 19879:2010 (E) 4 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 pene
28、trate 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 a
29、nd 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 Inte
30、rnational 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 Internat
31、ional 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 a
32、pplies. 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
33、-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 a
34、nd related products (class L) Classification Part 4: Family H (Hydraulic systems) DIN EN ISO 19879:2011-01 EN ISO 19879:2010 (E) 5 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 t
35、ested 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
36、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 t
37、ests, 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 fo
38、r test assemblies Part code Part name Description and further information A Straight stud connector The type of stud end, connector end and sealing method is optional but shall be recorded in the test report. B Metallic tube The required tube wall thickness shall be selected according to the working
39、 pressure rating of the respective connector. The length of the tube shall be five times the tube outside diameter plus 50 mm. C Shaped connector, with swivel, if applicable D Blanking end (cap or plug) E Shaped connector with adjustable stud end F Flange connector G Sealing e.g. O-ring. DIN EN ISO
40、19879:2011-01 EN ISO 19879:2010 (E) 6 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 aL = 5 the tube OD (in millimetres) + 50 mm. Figure 1 Test assembly for tube connection Type 1 a) Non-adjustable stud end connection
41、 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 DIN EN ISO 19879:2011-01 EN ISO 19879:2010 (E) 7 Key 1 swi
42、vel 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 a
43、This end capped or plugged. Figure 4 Test assembly for flange connectors Type 4 DIN EN ISO 19879:2011-01 EN ISO 19879:2010 (E) 8 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
44、 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 an
45、d 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 3
46、601-3, 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
47、connectors made of materials other than carbon steel, the manufacturers 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
48、 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 adjus
49、table 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
