1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 19879:2010Metallic tube connections forfluid power and general use Test methods for hydraulicfluid power connectionsBS EN ISO 19879:2010 BRITISH STANDARDNational forewo
2、rdThis British Standard is the UK implementation of EN ISO19879:2010. It supersedes BS EN ISO 19879:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/18/-/4, Connectors and associated components.A list of organizations represented on this committ
3、ee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 70344 7ICS 23.040.60; 23.100.40Compliance with a British Standard cannot confer immunity from
4、legal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2010.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 19879 September 2010 ICS 23.040.60; 23.100.40 Super
5、sedes EN ISO 19879:2005English Version Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections (ISO 19879:2010)Raccords de tubes mtalliques pour transmissions hydrauliques et pneumatiques et applications gnrales - Mthodes dessai pour raccords po
6、ur transmissions hydrauliques (ISO 19879:2010) Metallische Rohrverschraubungen fr Fluidtechnik und allgemeine Anwendung - 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 com
7、ply 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 Manage
8、ment 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 th
9、e 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, Romani
10、a, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN 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 wo
11、rldwide for CEN national Members. Ref. No. EN ISO 19879:2010: EBS EN ISO 19879:2010EN ISO 19879:2010 (E) 3 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
12、 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 Marc
13、h 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 rig
14、hts. 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, F
15、rance, 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 19
16、879:2010 without any modification. BS EN ISO 19879:2010ISO 19879:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 General requirements .2 5 Repeated assembly test6 6 Leakage test.6 7 Proof test7 8 Burst tes
17、t9 9 Cyclic endurance test .9 10 Vacuum test .10 11 Overtightening test11 12 Vibration test11 13 Cyclic endurance (impulse) test with vibration14 14 Identification statement (Reference to this International Standard).15 Annex A (normative) Test data form.16 Bibliography19 BS EN ISO 19879:2010ISO 198
18、79:2010(E) iv ISO 2010 All rights reservedForeword 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
19、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 Electr
20、otechnical 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
21、 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
22、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 e
23、dition (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.) BS EN ISO 19879:2010ISO 19879:2010(E) ISO 2010 All rights reserved vIntroduction In hydraulic fluid po
24、wer 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 determ
25、ining design application and for checking component compliance with the stated requirements. BS EN ISO 19879:2010BS EN ISO 19879:2010INTERNATIONAL STANDARD ISO 19879:2010(E) ISO 2010 All rights reserved 1Metallic tube connections for fluid power and general use Test methods for hydraulic fluid power
26、 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
27、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 per
28、formance 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 Internatio
29、nal 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
30、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
31、. 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, Fl
32、uid 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 rel
33、ated products (class L) Classification Part 4: Family H (Hydraulic systems) BS EN ISO 19879:2010ISO 19879:2010(E) 2 ISO 2010 All rights reserved3 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
34、 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 cycl
35、ic 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 cycli
36、c 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 Re
37、quirements for 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 t
38、o the working 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
39、. BS EN ISO 19879:2010ISO 19879:2010(E) ISO 2010 All rights reserved 3Key 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) No
40、n-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 BS EN ISO 19879:2010ISO 19
41、879:2010(E) 4 ISO 2010 All rights reservedKey 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
42、-flange clamp F flange connector 3 screw 4 washer aThis end capped or plugged. Figure 4 Test assembly for flange connectors Type 4 BS EN ISO 19879:2010ISO 19879:2010(E) ISO 2010 All rights reserved 54.2 Test equipment 4.2.1 Test block Test blocks shall be unplated and have a hardness between 35 HRC
43、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.
44、 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
45、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
46、 fluid with a viscosity of ISO VG 32 in accordance with ISO 3448. For 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 a
47、nd 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 su
48、pplied 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 hydrauli
49、c 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. BS EN ISO 19879:2010ISO 19879:2010(E) 6 ISO 2010 All rights reserved5 Repeated assembly test 5.1 Principle Unless otherwise specified in the respective connector standard, three type 1 test assemblies shall
