1、BSI Standards PublicationBS EN ISO 3949:2014Plastics hoses and hoseassemblies Textile-reinforcedtypes for hydraulic applications Specification (ISO 3949:2009)BS EN ISO 3949:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 3949:2014.It is identical to ISO
2、 3949:2009. It supersedes BS EN 855:1997 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/66, Rubber and plastics tubing, hoses and hoseassemblies.A list of organizations represented on this committee can beobtained on request to its secretary.This pu
3、blication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 81783 0ICS 23.100.40; 83.140.40Compliance with a British Standard cannot con
4、fer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3949 July 2014 ICS 23.100.40; 83.14
5、0.40 Supersedes EN 855:1996English Version Plastics hoses and hose assemblies - Textile-reinforced types for hydraulic applications - Specification (ISO 3949:2009) Tuyaux et flexibles en plastique - Types hydrauliques avec armature textile - Spcifications (ISO 3949:2009) Kunststoffschluche und -schl
6、auchleitungen - Textilverstrkte Typen fr hydraulische Anwendungen - Spezifikationen (ISO 3949:2009) This European Standard was approved by CEN on 24 July 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard t
7、he 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, Fre
8、nch, 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
9、, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey
10、 and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref
11、. No. EN ISO 3949:2014 EBS EN ISO 3949:2014EN ISO 3949:2014 (E) 3 Foreword The text of ISO 3949:2009 has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 3949:2014 by Technical Co
12、mmittee 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 January 2015, and conflicting national s
13、tandards shall be withdrawn at the latest by January 2015. 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
14、 855:1996. 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, Former Yugoslav Republic of Macedonia,
15、France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 3949:2009 has been approved by CEN as EN
16、ISO 3949:2014 without any modification. BS EN ISO 3949:2014ISO 3949:2009(E) ISO 2009 All rights reserved iiiContents PageForeword iv1Scope12Normative references13Terms and definitions.14Classification.25Materials and construction.25.1 Hoses25.2 Hose assemblies .26Dimensions and tolerances26.1 Diamet
17、ers.26.2 Concentricity37Physical properties .37.1 Hydrostatic requirements.37.2 Change in length .57.3 Minimum bend radius .57.4 Resistance to impulse.67.5 Leakage of hose assemblies67.6 Cold flexibility67.7 Ozone resistance.67.8 Electrical conductivity67.9 Fluid resistance.67.10 Visual examination7
18、8Frequency of testing.79Designation710 Marking.710.1 Hoses710.2 Hose assemblies .811 Recommendations for packaging and storage812 Test certificate.8Annex A (normative) Type and routine testing of hoses9Annex B (informative) Production testing10Annex C (informative) Recommendations for lengths of sup
19、plied hoses and tolerances on lengths of hose assemblies .11Annex D (normative) Test method for electrical conductivity .12Bibliography13BS EN ISO 3949:2014ISO 3949:2009(E)iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of na
20、tional standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member bodyinterested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. Internat
21、ional organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closelywith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rul
22、es given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at le
23、ast 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 3949 was prepared by Technical Committee ISO/TC 45,
24、 Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This fourth edition cancels and replaces the third edition (ISO 3949:2004), which has been technically revised. BS EN ISO 3949:2014INTERNATIONAL STANDARD ISO 3949:2009(E) ISO 2009 All rights reserved 1Plastics hoses and hos
25、e assemblies Textile-reinforcedtypes for hydraulic applications Specification1 Scope This International Standard specifies requirements for three types of textile-reinforced thermoplastics hoseand hose assembly of nominal size from 3,2 to 25. Each type is divided into two classes dependent onelectri
26、cal conductivity requirements.They are suitable for use with water-based hydraulic fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging from 0 C to + 60 C and oil-based hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743-4 at temperatures ranging from 40 C to + 1
27、00 C; This International Standard does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies.NOTE Operating temperatures in excess of 100 C may materially reduce the life of the hose. 2 NormativereferencesThe following referenced documents are indis
28、pensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenceddocument (including any amendments) applies.ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testingISO 1817, Rubber, vul
29、canized Determination of the effect of liquidsISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions ofhoses and the lengths of hose assembliesISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexibility testsISO 6743-4, Lubricants, industria
30、l oils and related products (classL) Classification Part 4: Family H(Hydraulic systems)ISO 6803, Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexingISO 7326:2006, Rubber and plastics hoses Assessment of ozone resistance under static conditionsISO 8330, Rubber
31、 and plastics hoses and hose assemblies VocabularyISO 8331, Rubber and plastics hoses and hose assemblies Guidelines for selection, storage, use andmaintenance 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 apply.BS EN ISO 3949:2014ISO 3949:200
32、9(E)2 ISO 2009 All rights reserved4 Classification Three types of hose are specified, dist inguished by their maximum wo rking pressure: a) Type R7: hoses with one or more layers of reinforcement. b) Type R8: hoses with one or more layers of reinforcement, f or operation at higher working pressur es
33、.c) Type R18: hoses with one or more layers of reinforcement, 21,0 MPa (210 bar)working pressure based. Each type of hose is divided into two classes according to its electrical properties:1) Class 1, no electrical requirements.2) Class 2, “non-conductive” (see 7.8). 5Materials and construction 5.1
34、Hoses Hoses shall consist of a seamless thermoplastic lining resistant to hydraulic fluids, with suitable textile yarnreinforcement and a thermoplastic cover resistant to hydraulic fluids, water and the weather. For class 2 hoses, the cover shall not be perforated. The cover shall be orange (colour
35、code RAL 2004). 5.2 Hose assemblies Hose assemblies shall only be manufactured with those hose fittings whose functionality confirms to therequirements of 7.1, 7.4, 7.5 and, for class 2 only, 7.8.Follow the manufacturers instructions for proper preparation and fabrication of hose assemblies.6 Dimens
36、ions and tolerances 6.1 Diameters When measured in accordance with ISO4671, the diameters of the hoses shall conform to the values given inTable 1. BS EN ISO 3949:2014ISO 3949:2009(E) ISO 2009 All rights reserved 3Table 1 Dimensions ofhoses Inside diametermm Maximum outside diametermm Type R7Type R8
37、 Type R18 Type R7Type R8 Type R18Nominal size min. max.min. max.min. max.3,2 3,4 4,0 3,4 4,0 3,4 4,0 9,5 10,5 9,5 5 4,6 5,4 4,6 5,4 4,6 5,4 11,4 14,6 10,8 6,3 6,2 7,0 6,2 7,0 6,2 7,0 13,7 16,8 13,5 8 7,7 8,5 7,7 8,5 15,6 18,6 16,6 10 9,3 10,3 9,3 10,3 9,3 10,3 18,4 20,3 18,4 12,5 12,3 13,5 12,3 13,5
38、 12,3 13,5 22,5 24,6 22,8 16 15,6 16,7 15,6 16,7 15,5 16,8 25,8 29,8 27,2 19 18,6 19,8 18,6 19,8 18,6 19,8 28,6 33,0 31,5 25 25,0 26,4 25,0 26,4 25,0 26,4 34,7 38,6 40,4 6.2 ConcentricityWhen measured in accordance with ISO 4671, the concentricity of hoses shall conform to Table 2.Table 2 Concentric
39、ity of hoses Nominal sizeMaximum variation in wallthickness between insidediameter and outside diametermm Up to and including 6,3 0,8 Over 6,3 and including 19 1,0 Over 19 1,3 7 Physical properties 7.1 Hydrostatic requirements When tested in accordance with ISO1402 at the relevant proof pressure giv
40、en in Table 3 and the relevantminimum burst pressure given in Table 4, the hoses and hose assemblies shall not leak. BS EN ISO 3949:2014ISO 3949:2009(E)4 ISO 2009 All rights reservedTable 3 Proof pressureTypeR7 R8R18Nominal size MPa (bar) MPa (bar) MPa (bar) 3,2 42,0 (420) 84,0 (840) 42,0 (420) 5 42
41、,0 (420) 70,0 (700) 42,0 (420) 6,3 38,5 (385) 70,0 (700) 42,0 (420) 8 35,0 (350) 42,0 (420) 10 31,5 (315) 56,0 (560) 42,0 (420) 12,5 28,0 (280) 49,0 (490) 42,0 (420) 16 21,0 (210) 38,5 (385) 42,0 (420) 19 17,5 (175) 31,5 (315) 42,0 (420) 25 14,0 (140) 28,0 (280) 42,0 (420) Table 4 Minimum burst pres
42、sure TypeR7 R8R18Nominal size MPa (bar) MPa (bar) MPa (bar) 3,2 84,0 (840) 168,0 (1 680) 84,0 (840) 5 84,0 (840) 140,0 (1 400) 84,0 (840) 6,3 77,0 (770) 140,0 (1 400) 84,0 (840) 8 70,0 (700) 84,0 (840) 10 63,0 (630) 112,0 (1 120) 84,0 (840) 12,5 56,0 (560) 98,0 (980) 84,0 (840) 16 42,0 (420) 77,0 (7
43、70) 84,0 (840) 19 35,0 (350) 63,0 (630) 84,0 (840) 25 28,0 (280) 56,0 (560) 84,0 (840) BS EN ISO 3949:2014ISO 3949:2009(E) ISO 2009 All rights reserved 5Table 5 Maximum working pressure TypeR7 R8R18Nominal size MPa (bar) MPa (bar) MPa (bar) 3,2 21,0 (210) 42,0 (420) 21,0 (210) 5 21,0 (210) 35,0 (350
44、) 21,0 (210) 6,3 19,2 (192) 35,0 (350) 21,0 (210) 8 17,5 (175) 21,0 (210) 10 15,8 (158) 28,0 (280) 21,0 (210) 12,5 14,0 (140) 24,5 (245) 21,0 (210) 16 10,5 (105) 19,2 (192) 21,0 (210) 19 8,8 (88) 15,8 (158) 21,0 (210) 25 7,0 (70) 14,0 (140) 21,0 (210) 7.2 Change in length When tested in accordance w
45、ith ISO 1402, the change in length of hose at themaximum working pressure(see Table 5) shall not exceed 3 %.7.3 Minimum bend radius Use test pieces having a length at least 4 times the minimum bend radius. Measure the hose outside diameterwith vernier callipers in the straight lay position before be
46、nding the hose. Bend the hose through 180 to theminimum bend radius and measure the flatnesswith the calliper. When bent to the minimum bend radius in Table 6, measured on the inside of the bend, the flatness shall notexceed 10 % of the original outside diameter. Table 6 Minimum bend radiusMinimum b
47、end radius mm TypeNominal size R7 and R8 R183,2 25 25 5 90 30 6,3 100 45 8 115 50 10 125 75 12,5 180 90 16 205 125 19 240 165 25 300 250 BS EN ISO 3949:2014ISO 3949:2009(E)6 ISO 2009 All rights reserved7.4Resistance to impulse 7.4.1 The impulse test shall be in accordance with ISO 6803. The test flu
48、id temperature shall be 100 C. 7.4.2 For type R7 hoses,when tested at animpulse pressure equa l to 125 % of the maximum wo rking pressure, the hose shall withstand a minimum of 150 000 impulse cycles. For type R8 and R18 hoses, when tested at an impulse pressure equal to 133 % of the maximum working
49、 pressure, the hose shall withstand a minimum of 200 000 impulse cycles. 7.4.3 There shall be no leakage or other malfunction before reaching the specified number of cycles. 7.4.4 This test shall be considered a destructive test and the test pieces shall be destroyed.7.5Leakage of hose assemblies When tested in accordancewi th ISO 1402, there shallbe no leakage or evidenceof failure. This test shall be considered a destructive test and the test piece shall be destroyed. 7.6 ColdflexibilityWh
