© ISO 2016 Rubber hoses and hose assemblies for water suction and discharge — Specification Tuyaux et flexibles en caoutchouc pour aspiration et refoulement d’eau — Spécifications INTERNATIONAL STANDA[.]
INTERNATIONAL STANDARD ISO 4641 Fifth edition 2016-12-01 Rubber hoses and hose assemblies for water suction and discharge — Specification Tuyaux et flexibles en caoutchouc pour aspiration et refoulement d’eau — Spécifications Reference number ISO 4641:2016(E) I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © ISO 2016 ISO 4641:2016(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2016, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) Contents Page Foreword iv Scope Normative references Terms and definitions Classification Coupling and fittings Materials and construction 6.1 6.2 6.3 Lining Reinforcement Cover 7.1 7.2 7.3 7.4 7.5 Bore (inside diameter) Enlarged ends Unit lengths Lining Cover 8.1 Rubber compounds 8.1.1 Rubber compounds 8.1.2 Tensile strength and elongation at break of rubber lining and cover 8.1.3 Resistance to aging Performance requirements for hoses and hose assemblies f 8.2.2 Burst test 8.2.3 Resistance to bending (minimum bend radius as a function of nominal size) 8.2.6 Adhesion 8.2.7 Ozone resistance of the cover Dimensions and tolerances Physical properties 8.2 10 8.2 H ydro s tatic- p res s ure requirements (p ro o 8.2 Res is tance to s uctio n flattening 8.2 Lo w- temp erature flexib ility p res s ure tes t) Frequency of testing Marking 10.1 Hoses 10.2 Hose assemblies 11 Test report/certificate 12 Packaging and storage Annex A (normative) Type tests and routine tests Annex B (informative) Production tests Annex C (informative) Couplings and end fittings 10 Bibliography 11 © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n iii ISO 4641:2016(E) Foreword I SO (the I nternational O rganiz ation for Standardiz ation) is a worldwide federation of national s tandards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has b een es tablished has the right to b e represented on that committee I nternational organi zation s , governmental and non- governmental, in liaison with I SO, al so take p ar t in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f elec trotechnical s tandardi z ation T he procedures used to develop this cument and those intended for its fur ther maintenance are describ ed in the I SO/I E C D irec tives , Par t I n p ar ticu lar the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial ru les of the I SO/I E C D irec tives , Par t (see www iso org/direc tives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the I SO l is t of p atent declarations received (see www iso org/p atents) Any trade name used in this document is in formation given for the convenience o f users and does not cons titute an endors ement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about I SO ’s adherence to the World Trade O rganization ( WTO) principles in the Technical B arriers to Trade (TB T ) see the following URL: www.iso.org/iso/foreword html T he committee res p ons ible for this cument is I SO/ TC 45 , SC , Rubber and plastics hoses and hose assemblies Rubber and rubber products, Sub committee This fi fth edition cancels and replaces the fourth edition (ISO 4641:2010), o f which it constitutes a minor revis ion with the fol lowing changes: — C laus e has been updated, where ISO 1746 and ISO 4672 have been deleted and replaced by ISO 10619-1 and ISO 10619-2, respectively; — tolerance dimens ion “in mm” has b een added to 7.1 — the text of , , 10 and 10 — Table ; has been slightly modified to bring the re ferences up to date; has been slightly modified to bring the re ferences up to date; — Bibliography has been updated as ISO 10619-1 and ISO 10619-2 are now published and listed in C laus e — the text has been editorially revised to comply with the most recent editing rules iv I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n INTERNATIONAL STANDARD ISO 4641:2016(E) Rubber hoses and hose assemblies for water suction and discharge — Specification Scope T h i s c ument s p e c i fie s the m i n i mu m re qu i rements suction and discharge hoses and hose assemblies for te xti le -rei n force d , s mo o th-b ore rubb er water- T h re e typ e s o f ho s e s a nd ho s e as s embl ie s a re s p e ci fie d accord i ng to thei r op erati ng duty re qui rements , i.e their ambient and water temperature ranges: — a mbient temp erature s: −2 ° C to +70 ° C; — water temp eratu re s du ri ng op eration: ° C to +70 ° C Normative references T he fol lowi ng c u ments are re ferre d to i n the tex t i n s uch a way th at s ome or a l l o f thei r content s titute s re qu i rements o f th i s c u ment For date d re ference s , on ly the e d ition cite d app l ie s For u ndate d re ference s , the late s t e d ition o f the re ference d c ument (i nclud i ng a ny amend ments) appl ie s ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests ISO 1307:2006, 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 2393, Rubber test mixes — Preparation, mixing and vulcanization — Equipment and procedures ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses and the lengths o f hose assemblies ISO 7233:2016, Rubber and plastics hoses and hose assemblies — Determination of resistance to vacuum ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions ISO 8033, Rubber and plastics hoses — Determination of adhesion between components ISO 8331, Rubber and plastics hoses and hose assemblies — Guidelines for selection, storage, use and maintenance ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1: Bending tests at ambient temperature ISO 10619-2:2011, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 2: Bending tests at sub-ambient temperatures Terms and definitions For the pu r p o s e s o f th i s c u ment, the term s and defi nition s given i n I S O 3 apply © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) I SO and I E C maintain terminological datab ases for us e in s tandardiz ation at the fol lowing addres ses: — I E C E lec trop edia: avai lable at http://www elec trop edia org/ — I SO O n l ine brows ing platform: avai lable at http://www iso org/obp Classification Hoses and hose assemblies for this application are classified into three types according to their operating duty requirements — Type 1: Light-duty hoses for suction service to −0,063 MPa (−0,63 bar) and for discharge pressures up to 0,3 MPa (3 bar) — Type 2: Medium-duty hoses for suction service to −0,08 MPa (−0,8 bar) and for discharge pressures up to 0,5 MPa (5 bar) — Type 3: Heavy-duty hoses for suction service to −0,097 MPa (−0,97 bar) and for discharge pressures up to 1,0 MPa (10 bar) Coupling and fittings Hoses shall be fitted with end fittings/couplings to form hose assemblies Annex C lists types o f coupling and end fitting Materials and construction 6.1 Lining The lining shall consist o f suitably compounded water-resistant natural or synthetic rubber Its internal s urface shal l b e s mo oth and free from imp erfec tions which cou ld imp air the exp ec ted us e 6.2 Reinforcement The rein forcement shall consist o f a suitable textile material and may contain a helix that can be metallic wire or of another s uitable material 6.3 Cover The cover shall consist o f suitably compounded natural or synthetic rubber Its external sur face may be corrugated or fluted An external helix is optional and can be either metallic wire or o f another suitable material Dimensions and tolerances 7.1 Bore (inside diameter) T he nominal s i ze range is 16 to with b ore diameters and tolerances in m m as shown in Table 7.2 Enlarged ends Where enlarged ends are required, the dimensions and tolerances shall be specified by agreement b etween the purchas er and the manufac turer T he des ign of the enlarged end shal l take into account the hose p erformance requirements I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) 7.3 Unit lengths The unit lengths shall be determined according to the conditions o f use as specified by the purchaser The tolerances, unless otherwise agreed between the purchaser and the manufacturer, shall be those specified in ISO 1307:2006, Table 7.4 Lining When measured in accordance with ISO 4671, the minimum thickness of the lining shall be 1,5 mm See Table 7.5 Cover When measured in accordance with ISO 4671, the minimum thickness of the cover shall be mm If the cover is fluted, the depth o f the flutes shall be not greater than 50 % o f the cover thickness See Table Physical properties 8.1 Rubber compounds 8.1.1 Rubber compounds Wherever possible, all tests shall be carried out on test pieces cut from the finished hose Otherwise, take samples from test sheets prepared in accordance with ISO 2393 and vulcanized to the same degree as the hose The physical properties o f the rubber compounds used for the lining and cover shall form to the values given in Table 8.1.2 Tensile strength and elongation at break of rubber lining and cover When tested in accordance with ISO 37, the lining and cover shall have a tensile strength and elongation at break of not less than the values given in Table 8.1.3 Resistance to aging A fter ageing as specified in ISO 188 for three days at a temperature o f 100 °C ± °C, the tensile strength and elongation at break o f the lining and cover, as determined by ISO 37, shall not vary by more than ±25 % and ±50 %, respectively, from the initial values Table — Physical properties of rubber compounds Property Unit Tensile strength, Elongation at break, Resistance to ageing Change in tensile strength from original value (max.) Change in elongation at break from original value (max.) MPa % © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n % % Requirements Lining Cover 200 200 ±25 ±25 ±50 ±50 Method of test ISO 37 (dumb-bell test piece) ISO 37 (dumb-bell test piece) ISO 188 (3 days at 100 °C ± °C); ISO 37 (dumb-bell test piece) ISO 4641:2016(E) 8.2 Performance requirements for hoses and hose assemblies 8.2.1 Hydrostatic-pressure requirements (proof pressure test) T he pro o f pre s s ure te s t s l l b e c a rrie d out on fu l l leng th s o f fi n i she d ho s e and on ho s e a s s embl ie s When te s te d i n accordance with I S O 14 02 , the ho s e (and the ho s e a s s embly) s l l me e t the re qu i rements of Table The maximum variation in length and outside diameter at maximum working pressure shall fai l b e ±7 % , and the ho s e/ ho s e as s emb ly sha l l no t burs t or b y s howi ng s ign s o f le a kage, cracki ng , abrup t distortion indicating irregularities in material or manufacture or other signs of failure See Table Table — Hydrostatic-pressure requirements Hose type Maximum working pressure Proof pressure Minimum burst pressure M Pa bar MPa bar M Pa bar 0,3 0,5 1,0 10 0,5 0,8 1,6 16 1,0 10 1,5 15 3,0 30 8.2.2 Burst test When te s te d b y the me tho d s p e ci fie d i n I S O 14 02 , ho s e s s l l me e t the re qu i rements o f Table 8.2.3 Resistance to bending (minimum bend radius as a function of nominal size) When s ubj e c te d to the m i n i mu m b end rad i i given i n Table 3, in accordance with one of the methods s p e c i fie d i n I S O 10 619 -1 (the me tho d cho s en to b e the mo s t appropri ate one for the s i z e o f ho s e) , ho s e s shall show no kinking, breaking or peeling under visual examination The value of T/D shall not be lower than 0,95 Table — Nominal sizes, tolerances and minimum bend radii Nominal size I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n Inside diameter mm Minimum bend radius mm max 16 15,4 16,6 50 20 19,4 20,6 60 25 24,2 25,8 75 31,5 30,5 32 ,5 95 40 39,0 41,0 120 50 48,8 51,2 150 63 61,8 64,2 250 80 78,6 81,4 320 100 98,4 101,6 500 125 123,4 126,6 750 150 148,0 152 ,0 960 160 158,0 162 ,0 980 200 197,5 202 ,5 200 250 247,0 253,0 500 315 312 ,0 318,0 900 ISO 4641:2016(E) 8.2.4 Resistance to suction flattening The test shall be carried out in accordance with ISO 7233 The test conditions shall be as follows: — − , M Pa (− , b ar) — − , M Pa (− , b ar) — − , M Pa (− ,9 b ar) for for typ e ; typ e ; for typ e Duration of test: 10 For ho s e s o f nom i na l i n s ide d ia me ter gre ater th an m m (I S O 3 : 016 , M e tho d C ) , the me as u re d col lap s e s l l no t exce e d % o f the nom i na l i n s ide d i ame ter 8.2.5 Low-temperature flexibility When te s te d at −2 ° C b y I S O 10 619 -2 : 01 , Me tho d B , a l l typ e s o f ho s e sh a l l b e p a s s the pro o f pre s s u re te s t a s s p e c i fie d i n 8.2.1 fre e o f cracks and sh a l l 8.2.6 Adhesion When determined in accordance with ISO 8033, the adhesion between the various components (except the helix, when included in the construction of the hose wall) shall be not less than kN/m See Table 8.2.7 Ozone resistance of the cover When te s te d i n accord ance with I S O 6: 016 , M e tho d , a l l typ e s o f ho s e sh a l l b e Table fre e o f cracks S e e Table — Physical properties o f finished hoses and hose assemblies Property Hose dimensions Inside diameter Cover thickness Lining thickness Length tolerance Unit mm mm mm % Hose/hose assembly tests Proof pressure Variation in length at max working pressure Variation in outside diameter at max working pressure Burst pressure (min.) Vacuum test Resistance to bending L ow- temp eratu re fle xib i l ity Adhesion between components Ozone resistance (cover) © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n M P a ( b a r) Requirement See Table M in M in , See ISO 1307:2006, Table See 8.2.1 and Table % M a x ±7 % M a x ±7 M P a ( b a r) M P a ( b a r) — — kN/m — See 8.2.2 and Table See 8.2.4 See 8.2.3 and Table See 8.2.5 M in N o c racki n g ob s er ve d at m agn i fic a tion Method of test ISO 4671 ISO 4671 ISO 4671 ISO 4671 ISO 1402 ISO 1402 ISO 4671 ISO 1402 ISO 7233 ISO 10619-1 ISO 10619-2:2011, M e tho d B ISO 8033 - ISO 7326:2016, M e tho d ISO 4641:2016(E) Frequency of testing Type and routine testing shall be as specified in Annex A Type testing is carried out in order to confirm that all the material, construction and test requirements specified in this document have been met by the method o f manu facture and the hose design Type testing shall be repeated at intervals o f, at the most, five years or whenever a change in the method of manufacture or the materials occurs and shall be performed on the largest-diameter hose of each design in the manu facturer’s range for each type Routine tests are those tests carried out on each length o f finished hose or hose assembly Production tests are those tests carried out per batch (see the schedule given in Annex B, which is for guidance only) 10 Marking 10.1 Hoses The hose shall be indelibly and legibly marked, at intervals o f not more than m on the outer cover, with at least the following information: a) the manu facturer’s name or trade mark; b) the manu facturer’s product identification; c) the number and year o f publication o f this document, i.e ISO 4641:2016; d) the hose classification, i.e the type; e) the nominal size; f ) the maximum working pressure [in megapascals and in bars, with the units indicated, e.g MPa (10 bar)]; g) the quarter and year o f manu facture EXAMPLE MAN/XXX/ISO 4641:2016/Type 3/size 250/1 MPa (10 bar)/4Q2016 10.2 Hose assemblies The couplings/end fittings shall be permanently marked with the following minimum in formation: a) the name or identification o f the producer/assembler o f the hose assembly; b) the maximum working pressure o f the assembly [in megapascals and in bars, with the units indicated, e.g MPa (10 bar)]; c) two digits indicating the month o f assembly followed by a slash and the last two digits o f the year o f assembly (e.g 12/16); d) the name or logo o f the coupling manu facturer; e) (optional) identification o f the coupling/end fitting material (i f required by the purchaser) EXAMPLE MAN/1 MPa (10 bar)/12/16 + coupling manu facturer’s logo and identification o f material 11 Test report/certificate When requested by the purchaser, the manu facturer or supplier shall provide a test report or test certificate with each length o f hose or batch o f hoses supplied to the purchaser I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) 12 Packaging and storage Packaging and storage shall be in accordance with ISO 8331 © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) Annex A (normative) Type tests and routine tests Table A.1 give s the te s ts to b e c a rrie d out for typ e and routi ne te s ti ng as defi ne d i n C lause Table A.1 Property Compound tests Type testing Routine testing Ten s i le s treng th and elongation at brea k X N A Res i s tance to agei ng X N A Ad hes ion X N A O z one res i s tance (cover) X N A Hose tests Res i s tance to b endi ng X N A L ow-temp eratu re fle xib i l ity X N A I n s ide d iame ter X X T h icknes s of l i ni ng X N A T h icknes s of cover X N A Res i s tance to s uc tion X X Res i s tance to pro of pres s u re X X Variation in length at ma x working press ure X X Variation i n O D at ma x worki ng pres s ure X X B u rs t s treng th X N A L en g th o f a s s emb l y X X Res i s tance to s uc tion X X Res i s tance to pro of pres s ure X X Hose assembly tests Variation in length at ma x working pres s ure X X Variation i n O D at ma x worki ng pres s ure X X B urs t s treng th X N A X Te s t s l l b e c a rr ie d o ut N A Te s t no t ap pl ic ab le I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 4641:2016(E) Annex B (informative) Production tests Table B.1 gives the suggested frequency of production tests (see Clause 9), to be carried out per batch or every 10 batches as indicated in the table A batch is defined as either 500 m o f hose or 10 000 kg o f lining and/or cover compound Table B.1 — Recommended test frequency Property Compound tests Tensile strength and elongation at break Resistance to ageing Hose tests Adhesion Ozone resistance (cover) Resistance to bending Low-temperature flexibility Inside diameter Thickness of lining Thickness of cover Length of hose Resistance to suction Resistance to proof pressure Variation in length at max working pressure Variation in O.D at max working pressure Burst strength X Test carried out N.A Test not applicable a One check per hose production batch © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n Production testing Per batch Every 10 batches X N.A N.A X X N.A X N.A X Xa Xa N.A X X X X N.A N.A X X X N.A N.A N.A N.A X X X X N.A ISO 4641:2016(E) Annex C (info rmative) Couplings and end fittings Ho s e s may b e fitte d with the fol lowi ng — bui lt-i n (s p e c ia l c as e s on ly) ; — cl amp e d; — s wage d or cri mp e d; — b ande d T he end fitti ng may b e o f the fol lowi ng coupl i ng typ e s to ne c tion typ e: — qu ick-rele a s e/quick- ac ti ng; — s c rew th re ad; — flange d; — u n ion; — s p e ci a l typ e (ca m lo ck, Storz , claw typ e, e tc ) Gu ida nce on coupl i ng typ e s i s given i n I S O/ T R 17 78 10 I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n form ho s e as s embl ie s: ISO 4641:2016(E) Bibliography [1] [2] [3] ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary ISO 10619-3, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 3: Bending tests at high and low temperatures ISO/TR 17784, Rubber and plastics hoses and hose assemblies — Guide for use by purchasers, assemblers, installers and operating personnel © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n 11 ISO 4641 : 01 6(E) ICS 23.040.70 Price based on 11 pages © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n