1、October 2009DEUTSCHE NORM English price group 11No part of this standard 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).ICS 23.040.70!$Z)f“1550667
2、www.din.deDDIN EN ISO 5771Rubber hoses and hose assemblies for transferring anhydrousammonia Specification (ISO 5771:2008)English version of DIN EN ISO 5771:2009-10Gummischluche und -schlauchleitungen fr den Transport von wasserfreiemAmmoniak Anforderungen (ISO 5771:2008)Englische Fassung DIN EN ISO
3、 5771:2009-10SupersedesDIN EN ISO 5771:1996-08www.beuth.deDocument comprises pages20 2 National foreword This document has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products”, (Secretariat: DSM, Malaysia) and has been adopted as EN ISO 5771:2008 by Technical Committee CEN/TC
4、218 “Rubber and plastics hoses and hose assemblies” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Technical Committee NA 045-02-12 AA Schluche. The DIN Standards correspond
5、ing to the International Standards referred to in clause 2 of this document are as follows: ISO 37 DIN 53504 ISO 1307 DIN EN ISO 1307 ISO 1402 DIN EN ISO 1402 ISO 4671 DIN EN ISO 4671 ISO 4672 DIN EN ISO 4672 ISO 7326 DIN EN 27326 ISO 8033 DIN EN ISO 8033 ISO 8330 DIN EN ISO 8330 Amendments This sta
6、ndard differs from DIN EN ISO 5771:1996-08 as follows: a) The standard has been editorially revised. Previous editions DIN EN ISO 5771: 1996-0 DIN EN ISO 5771:2009-10 83 National Annex NA (informative) Bibliography DIN 53504, Testing of rubber Determination of tensile strength at break, tensile stre
7、ss at yield, elongation at break and stress values in a tensile test DIN EN 27326, Rubber and plastics hoses Assessment of ozone resistance under static conditions DIN EN ISO 1307, Rubber and plastics hoses Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses DIN E
8、N ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing DIN EN ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of dimensions of hoses and length of hose assemblies DIN EN ISO 4672, Rubber and plastics hoses Sub-ambient temperature flexibility test
9、s DIN EN ISO 8033, Rubber and plastics hoses Determination of adhesion between components DIN EN ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary DIN EN ISO 5771:2009-10 4 This page is intentionally blank DIN EN ISO 5771:2009-10 EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO
10、 5771September 2008ICS 71.120.99; 83.140.40 Supersedes EN ISO 5771:1996 English VersionRubber hoses and hose assemblies for transferring anhydrousammonia - Specification (ISO 5771:2008)Tuyaux et flexibles en caoutchouc pour le transfertdammoniac anhydre - Spcifications (ISO 5771:2008)Gummischluche u
11、nd -schlauchleitungen fr den Transportvon wasserfreiem Ammoniak - Anforderungen 5771:2008)This European Standard 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
12、of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such 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 vers
13、ion in any other language made by translationunder the responsibility of a CEN member into its own language 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, Denma
14、rk, 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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONE
15、UROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 5771:2008: E(ISO2 Contents Page DIN EN ISO 5771:2009-10 EN ISO 5771:2008 (E) Foreword .3 1 S
16、cope4 2 Normative references4 3 Terms and definitions .5 4 Pressure rating 5 5 Materials and construction.5 5.1 Lining5 5.2 Reinforcement .5 5.3 Cover.5 5.4 Hose assemblies .5 6 Dimensions 6 6.1 Inside diameters and tolerances6 6.2 Outside diameter .6 6.3 Concentricity6 6.4 Tolerances on length 6 7
17、Physical properties .6 7.1 Rubber compounds.6 7.2 Finished hose 7 7.3 Ammonia resistance tests8 8 Hose assembly delivery test and annual in-use test requirements .11 9 Frequency of testing .12 10 Marking.12 11 Packaging and storage .12 12 Test certificate .12 Annex A (normative) Type and routine tes
18、ting of production hoses and hose assemblies 13 Annex B (informative) Periodic (quality control) testing of production hoses.14 Annex C (informative) Recommendations for the lengths of hoses supplied in bulk and for tolerances on the lengths of hose assemblies 15 Bibliography16 Foreword This documen
19、t (EN ISO 5771:2008) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with Technical 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 nat
20、ional standard, either by publication of an identical text or by endorsement, at the latest by March 2009, and conflicting national 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
21、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes 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 S
22、tandard: Austria, Belgium, Bulgaria, 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 Kingd
23、om. Endorsement notice The text of ISO 5771:2008 has been approved by CEN as EN ISO 5771:2008 without any modification. DIN EN ISO 5771:2009-10 EN ISO 5771:2008 (E) 3 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport
24、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 national regulatory conditions. CAUTION All personnel working with anhydrous ammonia and its delivery syste
25、ms 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 temperatures or pressures above those recommended by the hose manufacturer. Never recouple an anhydrous-ammonia h
26、ose. 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 transferring ammonia, in liquid or in gaseous form, at ambient temperatures from 40 C up to and including +
27、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 indispensable for the application of this document. For dated references, only the edition cited applies. For u
28、ndated references, the latest edition of the referenced document (including any amendments) applies. ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties ISO 188:2007, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 1307,
29、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 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and
30、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 conditions ISO 8033, Rubber and plastics hoses Determination of adhesion between components ISO 8330, Rubb
31、er and plastics hoses and hose assemblies Vocabulary DIN EN ISO 5771:2009-10 4EN ISO 5771:2008 (E) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 apply. 4 Pressure rating The pressure rating shall comply with the requirements of Table 1. Table
32、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 construction 5.1 Lining The lining shall be of uniform thickness of at least 1,5 mm, measured in accordance with ISO 4671, and free fr
33、om 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 hardening or other deterioration due to the action of ammonia. 5.2 Reinforcement The reinforcement shall consist of a material n
34、ot 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 requirements specified in Table 4. A suitable material is corrosion-resistant stainless steel. 5.3 Cover The rubber cover, when used,
35、 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 shall also be resistant to deterioration due to exposure to ammonia and exposure to the external environment. A gas-tight rubber co
36、ver 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 least 40 effective pinholes per metre of hose. 5.4 Hose assemblies Hose assemblies shall be made only from hoses complying with th
37、e performance requirements specified in Table 4. Only permanently attached ferrous-metal fittings shall be used. Specific information can be obtained from the hose manufacturer. In addition, guidance can be found in ISO/TR 17784. 5DIN EN ISO 5771:2009-10 EN ISO 5771:2008 (E) 6 Dimensions 6.1 Inside
38、diameters and tolerances When measured in accordance with ISO 4671, inside diameters shall conform to the values and tolerances specified in Table 2. Table 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 3
39、3,4 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 diameters, are specified, it is necessary that they be selected by the hose manufacturer to be in keeping with users needs and to provide complete fitti
40、ng compatibility, meeting the performance requirements of this specification. 6.3 Concentricity When determined in accordance with ISO 4671, the concentricity, 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 h
41、oses 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. Recommendations 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 Ru
42、bber 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 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 vu
43、lcanized to the same cure state as production hoses. DIN EN ISO 5771:2009-10 6EN ISO 5771:2008 (E) Table 3 Physical properties of the 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)
44、Minimum elongation at break 250 % 250 % ISO 37 (dumb-bell test pieces) Change in tensile strength from original value after oven ageing 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
45、 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 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 liste
46、d in Table 4, the physical properties of the finished hose shall conform to the required values. Table 4 Finished-hose performance requirements 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 max
47、imum 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 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 I
48、SO 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 b
49、reak of cover after conditioning and flexing, max. No blistering, cracking or leakage No blistering, cracking or leakage 125 bar (12,5 MPa) 20 % 50 % 7.3.2 7.3.3 ISO 1402 and 7.3.4 ISO 37 and 7.3.5 ISO 37 and 7.3.5 aTest pieces for adhesion testing shall be taken from hoses which have been conditioned for 30 days with ammonia as described in 7.3.2. 7DIN EN ISO 5771:2009-10 EN ISO 5771:2008 (E) 7.3 Ammonia resistance tests WARNING The operator in charge of the test installation and inspe
