1、BS EN ISO5771:2008ICS 71.120.99; 83.140.40NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRubber hoses andhose assembliesfor transferringanhydrous ammonia Specification (ISO5771:2008)This British Standardwas published underthe authority of theStandards Policy an
2、dStrategy Committee on 30November 2008 BSI 2008ISBN 978 0 580 57079 7Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 5771:2008National forewordThis British Standard is the UK implementation of EN ISO 5771:2008. Itsupersedes BS EN ISO 5771:1996 which is withdrawn.The UK participa
3、tion 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 be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a cont
4、ract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 5771September 2008ICS 71.120.99; 83.140.40 Supersedes EN ISO 5771:1996 English VersionRubber hoses and hose as
5、semblies for transferring anhydrousammonia - Specification (ISO 5771:2008)Tuyaux et flexibles en caoutchouc pour le transfertdammoniac anhydre - Spcifications (ISO 5771:2008)Gummischluche und -schlauchleitungen fr den Transportvon wasserfreiem Ammoniak - Anforderungen (ISO5771:2008)This European Sta
6、ndard was approved by CEN on 30 August 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s
7、uch nationalstandards 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 translationunder the responsibility of a CEN member into its own language
8、 and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembou
9、rg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of
10、exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 5771:2008: EBS EN ISO 5771:2008EN ISO 5771:2008 (E) 3 Foreword This document (EN ISO 5771:2008) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with T
11、echnical Committee 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 March 2009, and conflicting n
12、ational standards shall be withdrawn at the latest by March 2009. 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 supers
13、edes EN ISO 5771:1996. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ic
14、eland, 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 5771:2008 has been approved by CEN as a EN ISO 5771:2008 without any modification. BS
15、 EN ISO 5771:2008ISO 5771:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Pressure rating.2 5 Materials and construction.2 5.1 Lining 2 5.2 Reinforcement2 5.3 Cover.2 5.4 Hose assemblies2 6 Dimensions.3 6.1 Inside diam
16、eters and tolerances3 6.2 Outside diameter3 6.3 Concentricity3 6.4 Tolerances on length.3 7 Physical properties3 7.1 Rubber compounds.3 7.2 Finished hose.4 7.3 Ammonia resistance tests 5 8 Hose assembly delivery test and annual in-use test requirements .8 9 Frequency of testing .9 10 Marking .9 11 P
17、ackaging and storage .9 12 Test certificate9 Annex A (normative) Type and routine testing of production hoses and hose assemblies.10 Annex B (informative) Periodic (quality control) testing of production hoses.11 Annex C (informative) Recommendations for the lengths of hoses supplied in bulk and for
18、 tolerances on the lengths of hose assemblies.12 Bibliography 13 BS EN ISO 5771:2008ISO 5771:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Inte
19、rnational 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 wi
20、th 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 technic
21、al 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 t
22、o 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 5771 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and
23、plastics). This third edition cancels and replaces the second edition (ISO 5771:1994), which has been technically revised. The main changes are the addition of a concentricity requirement (see 6.3), increases in the lining and cover adhesion requirements (see Table 4) and more detailed cover pin-pri
24、cking requirements (see 5.3). It also incorporates the Technical Corrigendum ISO 5771:1994/Cor.1:1995. BS EN ISO 5771:2008INTERNATIONAL STANDARD ISO 5771:2008(E) ISO 2008 All rights reserved 1Rubber hoses and hose assemblies for transferring anhydrous ammonia Specification WARNING Persons using this
25、 International Standard should be familiar with normal laboratory practice. This standard does not purport to address all the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and to ensure compliance with any
26、national regulatory conditions. CAUTION All personnel working with anhydrous ammonia and its delivery systems should be familiar with and utilize the necessary safety precautions to minimize the potential for personal injury and property damage. Do not use anhydrous-ammonia hose assemblies at temper
27、atures or pressures above those recommended by the hose manufacturer. Never recouple an anhydrous-ammonia hose. Hoses manufactured to this specification are suitable for use with anhydrous ammonia only. 1 Scope This International Standard specifies the minimum requirements for rubber hoses used for
28、transferring ammonia, in liquid or in gaseous form, at ambient temperatures from 40 C up to and including +55 C. It does not include specifications for end fittings, but is limited to the performance of the hoses and hose assemblies. 2 Normative references The following referenced documents are indi
29、spensable 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 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain propertie
30、s ISO 188:2007, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 1307, Rubber and plastics hoses Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO
31、 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and the lengths of hose assemblies ISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexibility tests ISO 7326, Rubber and plastics hoses Assessment of ozone resistance under static
32、 conditions ISO 8033, Rubber and plastics hoses Determination of adhesion between components ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary BS EN ISO 5771:2008ISO 5771:2008(E) 2 ISO 2008 All rights reserved3 Terms and definitions For the purposes of this document, the terms and d
33、efinitions given in ISO 8330 apply. 4 Pressure rating The pressure rating shall comply with the requirements of Table 1. Table 1 Pressure requirements Pressure requirements Parameter bar MPa Maximum working pressure 25 2,5 Proof pressure 63 6,3 Minimum burst pressure 125 12,5 5 Materials and constru
34、ction 5.1 Lining The lining shall be of uniform thickness of at least 1,5 mm, measured in accordance with ISO 4671, and free from holes, porosity and other defects. The finished hose lining shall comply with the performance requirements specified in Table 3. The material used shall be resistant to h
35、ardening or other deterioration due to the action of ammonia. 5.2 Reinforcement The reinforcement shall consist of a material not adversely affected by permeating ammonia. It shall be applied evenly and uniformly, and in such a way that the finished hose complies with the relevant performance requir
36、ements specified in Table 4. A suitable material is corrosion-resistant stainless steel. 5.3 Cover The rubber cover, when used, shall be uniform in quality and thickness and shall be free from injurious defects. It shall comply with the relevant performance requirements specified in Table 3. It shal
37、l also be resistant to deterioration due to exposure to ammonia and exposure to the external environment. A gas-tight rubber cover shall be pin-pricked during manufacture to permit the release of any permeating gas during service. The pinholes shall not penetrate the lining and there shall be at lea
38、st 40 effective pinholes per metre of hose. 5.4 Hose assemblies Hose assemblies shall be made only from hoses complying with the performance requirements specified in Table 4. Only permanently attached ferrous-metal fittings shall be used. Specific information can be obtained from the hose manufactu
39、rer. In addition, guidance can be found in ISO/TR 17784. BS EN ISO 5771:2008ISO 5771:2008(E) ISO 2008 All rights reserved 36 Dimensions 6.1 Inside diameters and tolerances When measured in accordance with ISO 4671, inside diameters shall conform to the values and tolerances specified in Table 2. Tab
40、le 2 Nominal size and permitted ID range Nominal size Minimum ID mm Maximum ID mm 12,5 12,1 13,5 16 15,3 16,7 19 18,5 19,9 25 24,6 26,6 31,5 31,0 33,4 38 37,3 39,7 51 49,6 52,0 64 62,3 64,7 76 75,0 77,4 6.2 Outside diameter Although no required outside diameters, or required tolerances on such diame
41、ters, are specified, it is necessary that they be selected by the hose manufacturer to be in keeping with users needs and to provide complete fitting compatibility, meeting the performance requirements of this specification. 6.3 Concentricity When determined in accordance with ISO 4671, the concentr
42、icity, based on a total indicator reading between the internal diameter and the outside surface of the cover, shall be no greater than 1,0 mm for hoses of internal diameter up to and including 76 mm. 6.4 Tolerances on length Tolerances on cut lengths shall be as specified in ISO 1307. Recommendation
43、s for the lengths of hoses supplied in bulk and for tolerances on the lengths of hose assemblies are given in Annex C. 7 Physical properties 7.1 Rubber compounds When tested by the methods listed in Table 3, the physical properties of the compounds used for the lining and cover shall conform to the
44、required values. Tests shall be carried out on test pieces taken either from the hose or from separately vulcanized sheets 2 mm in thickness and vulcanized to the same cure state as production hoses. BS EN ISO 5771:2008ISO 5771:2008(E) 4 ISO 2008 All rights reservedTable 3 Physical properties of the
45、 rubber compounds used for the lining and cover Requirements Property Lining Cover Test method Minimum tensile strength 7,0 MPa 7,0 MPa ISO 37 (dumb-bell test pieces) Minimum elongation at break 250 % 250 % ISO 37 (dumb-bell test pieces) Change in tensile strength from original value after oven agei
46、ng 25 % Age in accordance with ISO 188:2007 for 72 h 2 h at 70 C 1 C using a cell-type oven or a cabinet oven (method A) Test in accordance with ISO 37 (dumb-bell test pieces) Change in elongation at break from original value after oven ageing 50 % Age in accordance with ISO 188:2007 for 72 h 2 h at
47、 70 C 1 C using a cell-type oven or a cabinet oven (method A) Test in accordance with ISO 37 (dumb-bell test pieces) 7.2 Finished hose When tested by the methods listed in Table 4, the physical properties of the finished hose shall conform to the required values. Table 4 Finished-hose performance re
48、quirements Property Requirement Method of test Proof test pressure 63 bar (6,3 MPa) ISO 1402 Minimum burst pressure 125 bar (12,5 MPa) ISO 1402 Change in length at maximum working pressure, max. 5 % at 25 bar (2,5 MPa) ISO 1402 Low-temperature flexibility No breaks or cracks in cover or lining at 40
49、 C ISO 4672:1997, method B Adhesion of the lining, min.a1,75 kN/m ISO 8033 Adhesion of the reinforcement, min.a1,50 kN/m ISO 8033 Adhesion of the cover, min.a1,75 kN ISO 8033 Ozone resistance of the cover No cracks ISO 7326:2006, method 1, using 100 phm ozone Ammonia resistance tests: ammonia conditioning flexing minimum burst pressure after conditioning and flexing change in tensile strength of cover after conditioning and flexing, max. change in elongation at break of cover after conditionin
