© ISO 2017 Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 3 Fittings Systèmes de canalisations en plastique pour les installations d’eau chaude et froide — Polyb[.]
INTERNATIONAL STANDARD ISO 15876-3 Second edition 2017-01 Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 3: Fittings Systèmes de canalisations en plastique pour les installations d’eau chaude et froide — Polybutène (PB) — Partie 3: Raccords Reference number ISO 15876-3:2017(E) © ISO 2017 ISO 15876-3:2017(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2017, 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 © ISO 2017 – All rights reserved ISO 15876-3:2017(E) Contents Page Foreword iv Introduction v Scope Normative references Terms and definitions, symbols and abbreviated terms Material characteristics 4.1.1 PB fitting material no t identical to the PB p ip e co mp o und Plas tics fitting material o ther than PB M etallic fitting material I nfluence o n water intended o r human co ns ump tio n General characteristics 5.1 PB Fitting material identical to the PB pipe compound f Plas tics fitting material Appearance O p acity Geometrical characteristics 6.1 6.2 6.3 General 6.1.1 Nominal diameter(s) 6.1.2 Angles 6.1.3 Threads f f f Figure 1) f f f f f f D imens io ns o s o ckets o r s o cket weld and electro - us io n fittings 6.2 D imens io ns o s o cket 6.2 D imens io ns o s o ckets D imens io ns o us io n fittings (s ee o r electro us io n fittings metallic fittings Mechanical characteristics o f plastics fittings Melt flow rate 12 10 11 7.1 7.2 7.3 7.4 General Fitting material identical to the PB pipe compound 10 Fitting made from PB not identical to the PB pipe compound 10 Fitting made from plastics other than PB 10 Sealing elements 12 Performance requirements 12 Marking 12 11.1 General requirements 12 11.2 Minimum required marking 12 11.3 Additional marking 13 Bibliography 14 © ISO 2017 – All rights reserved iii ISO 15876-3:2017(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards 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 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 Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular 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 rules of the ISO/IEC Directives, Part (see www.iso org/directives) 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 ISO list of patent declarations received (see www.iso org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html ISO 15876-3 was prepared by the European Committee Standardization (CEN) Technical Committee CEN/TC 155, Plastics pipings systems and ducting systems, in collaboration with ISO Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport offluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement) This second edition cancels and replaces the first edition (ISO 15876-3:2003), which has been technically revised with the following changes: — introduction o f polybutene random copolymer (PB-R) and renaming existing polybutene (PB) into polybutene homopolymer (PB-H); — revision o f specifications for conditioning o f samples A list of all parts in the ISO 15876 series can be found on the ISO website iv © ISO 2017 – All rights reserved ISO 15876-3 :2 017(E) Introduction The System Standard ISO 15876, o f which this document is Part 3, specifies the requirements for a piping system when made from polybutene (PB) The piping system is intended to be used for hot and cold water installations In respect o f potential adverse e ffects on the quality o f water intended for human consumption, caused by the product covered by ISO 15876 (all parts): — ISO 15876 (all parts) provides no in formation as to whether the product may be used without restriction in any o f the Member States o f the EU or EFTA; — it should be noted that, while awaiting the adoption o f verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force Requirements and test methods for materials and components, other than fittings, are specified in ISO 15876-1 and ISO 15876-2 Characteristics for fitness for purpose (mainly for joints) are covered in ISO 15876-5 ISO/TS 15876-7 gives guidance for the assessment o f formity This document specifies the characteristics o f the fittings At the date o f publication o f this standard, System Standards for piping systems o f other plastics materials used for the same application include ISO 15874, ISO 15875, ISO 15876, ISO 15877, ISO 21003 and ISO 22391 © ISO 2017 – All rights reserved v INTERNATIONAL STANDARD ISO 15876-3:2017(E) Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 3: Fittings Scope T h i s c u ment s p e ci fie s the charac teri s tic s o f fitti ngs to b e u s e d for for p olybutene -1 (PB -1) pipi ng s ys tem s i ntende d ho t and cold water i n s ta l l ation s with i n bui ld i ngs for or no t i ntende d huma n s u mp tion (dome s tic s ys tem s) for and the conveyance o f water, whe ther for he ati ng s ys tem s u nder de s ign pressures and temperatures according to the class of application (see ISO 15876-1) T he de s ignation p olybutene i s u s e d to ge ther with the abbrevi ation PB th roughout th i s c u ment This document covers a range of service conditions (application classes) and design pressure classes For values of TD, Tmax and Tmal in excess of those in ISO 15876-1 : 016 , Table , th i s cument es no t apply NO TE I t i s the re s p o n s ibi l ity o f the pu rch a s er o r s p e c i fier to m a ke the ap propr i ate s ele c tion s fro m the s e a s p e c ts , ta ki ng i nto acco u nt thei r p a r tic u l a r re qu i rements a nd a ny rele va nt n ation a l re gu l ation s a nd i n s ta l l ation practices or codes I t a l s o s p e c i fie s the p arame ters for the te s t me tho d s re ferre d to i n th i s c u ment I n conj u nc tion with the o ther p ar ts o f I S O 76 , th i s c u ment i s appl ic able to fitti ngs made PB a nd to fitti ngs made I S O 76 -2 ISO 15876-5 for from from o ther materia l s wh ich a re i ntende d to b e fitte d to pip e s form i ng to ho t and cold water i n s ta l l ation s , whereb y the j oi nts form to the re qui rements o f T h i s c ument i s appl ic able to fitti ngs o f the fu s ion — s o cke t — ele c tro fu s ion fitti ngs; — me ch an ic a l fitti ngs; — fitti ngs with i ncor p orate d i n s er ts fol lowi ng typ e s: fitti ngs; I t i s a l s o appl ic able to fitti ngs made from a lternative materi a l s wh ich , when fitte d to pip e s form i ng to ISO 15876-2, conform to the requirements of ISO 15876-5 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 appl 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 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) o f thermoplastics — Part 1: Standard method © ISO 2017 – All rights reserved ISO 876-3 : 01 7(E) ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 1: General method ISO 1167-3, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 3: Preparation of components ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 4: Preparation of assemblies ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions ISO 7686, Plastics pipes and fittings — Determination of opacity ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 15876-1:2016, Plastics piping system for hot and cold water installations — Polybutene (PB) — Part 1: General ISO 15876-2, Plastics piping system for hot and cold water installations — Polybutene (PB) — Part 2: Pipes ISO 15876-5, Plastics piping system for hot and cold water installations — Polybutene (PB) — Part 5: Fitness for purpose o f the system EN 681-1, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage applications — Part 1: Vulcanized rubber EN 681-2, Elastomeric seals — Materials requirements for pipe joint seals used in water and drainage applications — Part 2: Thermoplastic elastomers EN 1254-3, Copper and copper alloys — Plumbing fittings — Part 3: Fittings with compression ends for use with plastics pipes EN 1254-6, Copper and copper alloys — Plumbing fittings — Part 6: Fittings with push-fit ends EN 1254-8, Copper and copper alloys — Plumbing fittings — Part 8: Fittings with press ends for use with plastics and multilayer pipes EN 10088-1, Stainless steels — Part 1: List of stainless steels EN 10226-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Taper external threads and parallel internal treads — Dimensions, tolerances and designation Terms and definitions, symbols and abbreviated terms For the pu rp o s e s o f th i s c u ment, the term s and defi n ition s , s ymb ol s a nd abbrevi ate d term s given i n I S O 76 -1 and the fol lowi ng apply ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia org/ — ISO Online browsing platform: available at http://www.iso org/obp General 1 fitting comp onent o f a pipi ng s ys tem, wh ich conne c ts two or more pip e s and/or fitti ngs to ge ther, without any further function © ISO 2017 – All rights reserved ISO 15876-3:2017(E) 3.2 Mechanical fittings 3.2.1 compression fitting fitti ng i n wh ich the j oi nt i s made by the compre s s ion o f a ri ng or sle eve on the outs ide wa l l o f the pip e with or without additional sealing elements and with internal support 3.2.2 crimped fitting fitti ng i n wh ich the j oi nt i s made b y c ri mpi ng o f the fitti ng a nd/or a ri ng on the outs ide wa l l o f the pip e b y me an s o f a s p e ci a l to ol 3.2.3 flanged fitting fitti ng i n wh ich the pip e ne c tion s i s ts o f two mati ng flange s wh ich a re me ch an ic a l ly pre s s e d to ge ther and s e a le d b y the compre s s ion o f an ela s tomeric s e a l i ng element b e twe en them 3.2.4 flat seat union fitting fitti ng i n wh ich the pip e ne c tion s i s ts pri ma ri ly o f two comp onents , at le a s t one o f wh ich norma l ly i ncorp orate s a fl at s e a l i ng s u r face, wh ich are me ch an ic a l ly pre s s e d to ge ther b y me a n s o f s crewe d nut or s i m i l ar and s e a le d b y the compre s s ion o f an elas tomeric s e a l i ng element b e twe en them 3.3 Fittings for fusion 3.3.1 socket fusion fitting fitti ng i n wh ich the j oi nt with the pip e i s made b y melti ng to ge ther the outer p ar t o f the pip e with the i nner p ar t o f the fitti ng b y me an s o f he at i nduce d b y a he ate d to ol 3.3.2 electro fusion fitting fitti ng i n wh ich the j oi nt with the pip e i s made b y melti ng to ge ther the outer p ar t o f the pip e a nd the i nner p ar t o f the fitti ng by me an s o f he at i nduce d b y c u rrent flowi ng i n an appropriate re s i s tor i n s er te d i n the fitti ng b o dy 3.4 Fitting with incorporated inserts 3.4.1 fitting with incorporated inserts fitti ng i n wh ich the j oi nt i s made b y me an s o f conne c ti ng th re ad s or o ther outle ts , i n s er te d i n the pla s tic s b o dy combi ne d with fu s ion end s for s o cke t fu s ion or ele c tro fu s ion Material characteristics 4.1 Plastics fitting material 4.1.1 PB Fitting material identical to the PB pipe compound T he PB comp ou nd s l l comply with materi a l re qu i rements s p e c i fie d i n I S O 76 -1 and I S O 76 -2 The material shall be tested in form of tubular test pieces When te s te d i n accorda nce with the te s t me tho d s s p e ci fie d i n the te s t pie ce s s l l with s tand the hyd ro s tatic te s t pre s s ure, without bursting or leakage © ISO 2017 – All rights reserved Table 1, using the indicated parameters, p F, given in Table 6, Table or Table ISO 15876-3:2017(E) Table — Mechanical characteristic of tubular test pieces made of PB by injection moulding Characteristic Requirement Resistance to internal pressure Test parameters for the individual tests Test method Hydrostatic Test Test Number of ISO 1167-1 (hoop) stress temperature period test pieces and No bursting or leakage during the test period MPa 15,5 15,2 6,0 15,3 15,0 4,9 PB-H PB-R °C 20 20 95 20 20 95 h 1a 22 000 1a 22 000 Typ e o b end c ap Typ e a) No t s p e c i fie d Water-in-water Typ e o f te s t In case of dispute, tests shall be done at 20 °C/22 h a b T he s a mp l i n g p ro ce du re i s no t s p e c i fie d Fo r g u id a nce , s e e I S O/ T S 76 -7 P 4.1.2.1 B f i t t i n g m a t e r i a l n o t i d e n t i c a l 3 3 3 Test parameters for all tests Sampling procedure f Orientation of test piece t o t h e P B p i ISO 1167-3 p e c o m p o u [1] n d Evaluation of σLPL -values and control points T he fitti ng materia l i n form o f i nj e c tion mou lde d or ex tr ude d tubu l ar te s t pie ce s sha l l b e eva luate d b y using the method given in ISO 9080 or equivalent where internal pressure tests are made in accordance σLPL -values The σLPL -values thus determined shall be used to determine the design stress, σDF f σF, corresponding to the temperature and time control points given in Table with I S O 167-1 a nd I S O 167-3 to fi nd the , (s e e I S O 76 -2 ) and va lue s o O ne e qu i va lent way o f e va lu atio n i s to c a lc u l ate the NO TE hyd ro s tatic s tre s s , σLPL -value for each temperature (for example, ° C , 70 ° C a nd ° C ) i nd ividu a l l y If evaluation using the method given in ISO 9080 or equivalent is available from long-term internal f f temperature shall be equal to or higher than the maximum design temperature, Tmax, for the service condition class pre s s u re te s ts relative to ex tr ude d pip e s o T a b l e — C o n t r o l p o i n t s f o r c l t a e s s s t i Maximum design temperature, Tmax, in °C Test temperature, Ttest, in °C Test duration, in h a i n f i g c the s a me comp ou nd a s u s e d a f i t i t t o i n n g o f m s e a r t e v i All application classes Conducted at 95 °C to match existing test facilities — 20 r c i a e l c s o w n i d t i h t i t o u n b u or the fitti ng , the relevant te s t l a r t e s t p i e c e s r e l a t i v e t o s Class 80 95 a 000 Application Class 80 95 a 000 Class 70 80 000 Class 90 95 000 It is recommended that the nominal diameter of the tubular test pieces should be in the range of the nom i na l d ia me ters o f fitti ngs norma l ly pro duce d b y the manu fac tu rer © ISO 2017 – All rights reserved ISO 876-3 : 01 7(E) 4.1 2 Thermal stability When te s ti ng the therma l s tabi l ity b y hyd ro s tatic pre s s u re te s ti ng i n accorda nce with I S O 1167-1 at 110 ° C for 76 h, u s i ng a te s t pie ce i n pip e form or a fitti ng ne c te d to pip e s , the te s t pie ce sh a l l withstand the test without bursting The test shall be conducted in water-in-air at an internal pressure e quiva lent to the hyd ro s tatic s tre s s u s e d i n the pip e materia l therma l s tabi l ity te s t I f a fitti ng ne c te d to pip e s i s u s e d as a te s t pie ce a nd the pip e ne c tion s tabi l ity te s t s l l b e rep e ate d u s i ng a te s t pie ce i n pip e 4.1.3 fai l s , then the therma l form Plastics fitting material other than PB Pla s tic s materi a l, o ther than PB , water with i n bu i ld i ngs s ys tem s) and for for for fitti ngs i ntende d to b e u s e d i n PB pipi ng s ys tem s the conveya nce o f water, whe ther or no t he ati ng s ys tem s , s l l form to 4.3 for for ho t a nd cold hu man s u mp tion (dome s tic 4.2 Metallic fitting material M e ta l l ic materi a l for fitti ngs i ntende d to b e u s e d with comp onents form i ng to I S O 76 sha l l conform to the requirements given in EN 1254-3, EN 1254-6, EN 1254-8 or EN 10088-1, as applicable 4.3 Influence on water intended for human consumption The material shall conform to ISO 15876-1 General characteristics Appearance When viewe d without magni fic ation, the i nterna l a nd ex terna l s u r face s o f fitti ngs s l l b e s mo o th, cle a n and fre e from s cori ng , c avitie s and o ther s ur face de fe c ts to an e xtent th at wou ld prevent form ity to this document The material shall not contain visible impurities Slight variations in appearance of the colou r s l l b e p erm itte d E ach end o f a fitti ng sh a l l b e s quare to its a xi s Opacity Fittings that are declared to be opaque shall not transmit more than 0,2 % of visible light when tested in accordance with ISO 7686 T h i s te s t i s no t ne ce s s ar y when the fitti ng b o dy i s made the production of pipes from a comp ou nd a l re ady de clare d op aque for Geometrical characteristics 6.1 General Dimensions shall be measured in accordance with ISO 3126 6.1 Nominal diameter(s) The nominal diameter(s), dn , o f a fitti ng s l l corre s p ond to a nd b e de s ignate d by the nom i na l outs ide d i ame ter(s) o f the pip e(s) form i ng to I S O 76 -2 , 6.1 for wh ich they a re de s igne d Angles T he pre ferre d nom i na l angles o f non- s traight fitti ngs are 45 ° a nd ° © ISO 2017 – All rights reserved ISO 15876-3:2017(E) 6.1.3 Threads Threads used for jointing shall form to EN 10226-1 Where a thread is used as a fastening thread for jointing an assembly (e.g union nuts), it shall form to ISO 228-1, except that these requirements need not apply to the threads used by the manu facturer to join component parts o f a fitting together 6 2 D i m D i e n m e s i n o s i n o s n o s f o s f o s c o k e c t s k e t f o f u s r i s o o n c f i k e t t i t n w e g s ( l s d e a e n d e l e c t r o - f u s i o n f i t t i n g s Figure 1) Socket fusion fittings shall be classified in two types as follows: — type A: fittings intended to be used with pipes, where no external machining o f the pipe is required; — type B: fittings intended to be used with pipes, where machining o f the outside sur face o f the pipe is necessary in accordance with the instructions o f the manu facturer The nominal diameters o f the socket fusion fittings shall form to Table or Table Key D2 nominal outside diameter inside diameter of the socket mouth which comprises the mean diameter of the circle at the inner section of the extension of the socket with the plane of the socket mouth mean inside diameter of the socket root which comprises the mean diameter of the circle in a plane parallel D3 L1,min L2,min Rmax minimum socket length, which comprises the distance from the socket mouth to the shoulder minimum insertion length which comprises the depth of penetration of the heated pipe end into the socket allowed maximum root radius dn D1 to the plane o f the socket mouth and separated from it by a distance o f L 1,min minimum diameter o f the flow channel (bore) through the body o f a fitting F i g u r e — S o c k e t a n d s p i g o t d i m e n s i o n s f o r s o c k e t f u s i o n f i t t i n g s © ISO 2017 – All rights reserved ISO 15876-3:2017(E) Table — Diameters and lengths o f sockets for socket fusion fittings o f type A Dimensions in millimetres Nominal diameter of the fitting Root D1 D1,min dn a Mean inside diameter of socket 16 20 25 32 40 50 63 75 90 110 125 140 160 15,00 19,00 23,85 30,75 38,75 48,75 61,65 73,20 87,70 107,30 122,40 137,20 156,80 D1,max 15,45 19,45 24,40 31,20 39,30 49,30 62,20 74,00 88,70 108,40 124,60 139,50 159,50 Root D2 D2,min 14,74 18,74 23,54 30,40 38,37 48,31 61,16 72,90 87,40 106,90 121,50 135,60 155,40 D2,max 15,10 19,19 24,09 30,95 38,92 48,86 61,71 73,70 88,40 108,00 123,00 137,50 157,20 Maximum Minimum Radius at out-ofbore a socket roundness D3 root 0,55 0,55 0,55 0,65 0,65 0,75 0,75 1,00 1,20 1,30 1,20 1,20 1,40 D3,min 11,2 15,2 19,4 25,0 31,4 39,4 49,8 69,0 84,0 87,6 99,7 111,4 127,3 Rmax 2,5 2,5 2,5 3,0 3,0 3,0 4,0 4,0 4,0 4,0 4,0 4,0 5,0 Socket Penetration of pipe length into socket L1,min 16,5 16,5 19,5 21,5 24,0 27,0 30,0 33,0 37,0 43,0 40,0 43,0 47,0 L2,min 15,0 15,0 18,0 20,0 22,0 25,0 28,0 33,0 37,0 43,0 35,0 38,0 42,0 O n l y ap p l ic ab le , i f a s ho u lder e x i s ts Table — Diameters and lengths o f sockets for socket fusion fittings o f type B Dimensions in millimetres Nominal diameter of the fitting dn a 16 20 25 32 40 50 63 75 90 110 125 140 160 Mean inside diameter of socket Root D1 D1,min 15,2 19,2 24,2 31,1 39,0 48,9 61,9 73,7 88,6 108,4 122,7 137,6 157,2 D1,max 15,5 19,5 24,5 31,5 39,4 49,4 62,5 74,2 89,2 109,0 123,9 138,8 158,6 Root D2 D2,min 15,1 19,0 23,9 30,9 38,8 48,7 61,6 73,4 88,2 108,0 122,3 137,2 156,7 D2,max 15,4 19,3 24,3 31,3 39,2 49,2 62,1 73,9 88,8 108,6 123,5 138,4 158,1 Maximum Minimum Radius at out-ofbore a socket roundness D3 root 0,4 0,4 0,4 0,5 0,5 0,6 0,6 1,0 1,0 1,0 1,2 1,2 1,4 D3,min 11,2 15,2 19,4 25,0 31,4 39,4 49,8 59,4 71,6 87,6 99,7 111,4 127,3 Rmax 2,5 2,5 2,5 3,0 3,0 3,0 4,0 4,0 4,0 4,0 4,0 4,0 5,0 Socket Penetration of pipe length into socket L1,min 13,0 14,5 16,0 18,0 20,5 23,5 27,5 31,0 35,5 41,5 46,0 50,5 56,5 L2,min 9,5 11,0 12,5 14,5 17,0 20,0 24,0 27,5 32,0 38,0 42,5 47,0 53,0 O n l y ap p l ic ab le , i f a s ho u lder e x i s ts © ISO 2017 – All rights reserved ISO 15876-3:2017(E) D i m e n s i o n s o f s o c k e t s f o r e l e c t r o f u s i o n f i t t i n g s f f f Figure shall be in accordance with Table The values of lengths L1 and L2 (see Figure 2) shall be in accordance with Table The manufacturer shall declare the actual length T he pri ncip a l d i men s ion s o Key D1 D2 D3 L1 L2 L3 L4 or ele c tro u s ion fitti ngs as s hown i n mean inside diameter of the fusion zone which comprises the mean inside diameter when measured in a plane parallel to the plane of the mouth at a distance L3 + 0,5 L2 from that face minimum ins ide diameter o f the s o cket meas ured in any p lane p arallel to the p lane o f the mo uth at a dis tance not greater than L1 from that plane minimum b o re which co mp ris es the minimum diameter o f the flow channel thro ugh the b o dy o f the fitting I n the cas e o f a co up ling witho ut a s to p , it is no t greater than hal f the to tal length o f the fitting dep th o f p enetratio n o f the p ip e o r male end o f a s p igo t fitting no minal length o f the fus io n zo ne, which co mp ris es the heated length as declared by the manu facturer no minal unheated entrance length o f the fitting, which co mp ris es the dis tance b etween the mo uth o f the fitting and the s tart o f the fus io n zo ne as declared by the manu facturer no minal unheated length o f the fitting, which co mp ris es the dis tance b etween the end o f the fus io n zo ne and the end o f the p ip e as declared by the manu facturer F s o cke ts i g u r e — P r i n c i p a l d i m e n s i o n s f o r e l e c t r o f u s i o n f i t t i n g s © ISO 2017 – All rights reserved ISO 876-3 : 01 7(E) Table — Socket dimensions for electro fusion fittings Dimensions in millimetres Nominal diameter o f the fitting M inimum mean ins ide diameter fusion zone dn a a of 16 20 25 32 40 50 63 75 90 110 125 140 160 D1,min 16,1 20,1 25,1 32,1 40,1 50,1 63,2 75,2 90,2 110,3 125,3 140,3 160,4 Nominal length of fusion zone L2,min 10 10 10 10 10 10 11 12 13 15 16 18 20 I n p ip i n g s ys tem s th at i nvo l ve s p i go t tr i m m i n g , s m a l ler va lue s a re p e r m i tte d i f co n fo r m i n g to the m a nu fac tu re r ’s s p e c i fic atio n fo r D1 6.3 Dimensions o f metallic fittings M e ta l l ic fitti ngs s l l form to E N -3 Mechanical characteristics o f plastics fittings 7.1 General When tested in accordance with ISO 1167-1, ISO 1167-3 and ISO 1167-4 using the test parameters given in Table and Table f pressure, the component shall withstand the test pressure, pF, without bursting or leakage during the test period where the te s t pre s s ure i s given i n relation to the cl as s o fitti ng a nd de s ign P rior to the del iver y, the fitti ngs s l l me e t the me ch an ic a l charac teri s tic s The testing shall be conducted in water-in-air © ISO 2017 – All rights reserved ISO 15876-3:2017(E) The test pressure shall be calculated using Formula (1): σ (1) F pF = pD × σ DF where pF σF σDF is the hydro s tatic tes t pres s ure, i n b ars , to b e appl ied to the fitti ng b o dy duri ng the tes t p erio d; i s the va lue o f the hyd ro s tatic s tre s s , i n megap as c a l s , o f the fitti ng b o dy materia l corre s p ond ing to the test duration and test temperature conditions in Table and Table - ; i s the de s ign s tre s s va lue, i n me gap a s c a l s , o f the fitti ng b o dy materia l as de term i ne d for the appropriate service condition class from data produced in accordance with ISO 15876-1 and I S O 76 -2 ; pD NOTE is the design pressure of bar, bar, bar or 10 bar, as applicable bar = 10 N/m = 0,1 MPa Fitti ngs may b e ne c te d to the pip e s for wh ich they are i ntende d to b e u s e d O ther me tho d s may b e us e d to s e a l the end s o f the fitti ng b o dy i n order that the re qu i re d pre s s u re c an b e appl ie d 7.2 Fitting material identical to the PB pipe compound In this case, σDF has the same value as σDP Table or Table using the test pressures, pF pressure a nd the fitti ng s l l form to the re qu i rements given i n , gi ven, as appl ic able to the clas s o f fitti ng and the de s ign 7.3 Fitting made from PB not identical to the PB pipe compound Table and Table relating to test temperature Formula (1) σF, and design stress, σDF, derived as in 4.1.2, to determine T he fitti ng sh a l l form to the re qu i rements given i n and m i n i mu m ti me to and relevant va lue s fa i lu re for the test pressure, pF as appl ic able to the cl as s o f fitti ng and de s ign pre s s u re, u s i ng hyd ro s tatic s tre s s , 7.4 Fitting made from plastics other than PB Fitti ngs i ntende d to b e u s e d i n PB pipi ng s ys tem s conveyance o f water, whe ther or no t s ys tem s s l l form to 10 7.3 for for ho t a nd cold water with i n bui ld i ngs hu man s u mp tion (dome s tic s ys tem s) , a nd for for the he ati ng © ISO 2017 – All rights reserved ISO 876-3 : 01 7(E) T a b l e — D Maximum design temperature, Tmax, in °C e r m i n a t i o n o t e s t p r e s s u r e , p F , f o r P B - H Application class Class 80 Class 70 Class 90 5,72 5,04 5,46 4,30 14,3 c 16,3 21,7 27,1 13,9 c 15,9 21,2 26,5 5,5 c 6,3 8,4 10,5 14,3 c 18,5 24,7 30,8 G enera l l y, the h i ghe s t te s t temp e ratu re i s ta ken to b e ( fac i l i tie s , 95 20 b 95 20 b 80 20 b 95 22 000 22 000 22 000 22 000 15,5 15,2 6,0 15,5 15,2 6,0 15,5 15,2 8,3 15,5 15,2 6,0 material, σF, in MPa Test pressure, pF, in bar, for a design pressure, pD, of: bar bar bar 10 bar Number of test pieces e xi s ti n g te s t f 20 b H yd ro s tatic s tre s s o f fitti n g a e Class 80 D e s ign s tre s s o f fitti ng material, σDF, in MPa Test temperature a, Ttest, in °C Test duration, t, in h t the h i ghe s t te s t te mp e ratu re fo r 13,9 c 18,1 24,2 30,2 5,5 c 7,2 9,6 12,0 13,9 c 16,6 22,2 27,7 14,3 c 17,1 22,8 28,4 7,7c 9,2 12,2 15,3 14,5 21,7 28,9 36,1 14,2 21,3 28,3 35,4 5,6 8,4 11,2 14,0 max + 10) °C with an upper limit of 95 °C However, to match T cl a s s e s a nd i s a l s o s e t at ° C T he hyd ro s tatic s tre s s e s g i ven correspond to the given test temperatures b 20 °C/22 h test to be done in case of failure at 20 °C/1 h or in case of dispute c T he ° C , b a r, ye a rs , co ld wate r re qu i re ment, b ei n g h i ghe r, de te r m i ne s th i s va lue (s e e I S O 76 -1) T a b Maximum design temperature, Tmax, in °C l e — D e t e r m i n a t i o n o f D e s ign s tre s s o f fitti ng H yd ro s tatic s tre s s o a fitti n g fac i l i tie s , e s t p r e s s u r e , p F , f o r P B - R Class 80 Class 70 Class 90 5,12 4,33 4,13 95 20 b 95 20 b 80 20 b 95 000 22 000 22 000 22 000 4,9 15,3 15,0 4,9 15,3 15,0 7,3 15,3 15,0 4,9 4,5 c 5,7 7,6 9,5 14,1 c 18,0 24,0 29,9 G enera l l y, the h i ghe s t te s t temp e ratu re i s ta ken to b e ( e xi s ti n g te s t t Application class Class 80 5,16 material, σDF, in MPa Test temperature a, Ttest, in °C 20 b Test duration, t, in h 22 f 15,3 15,0 material, σF, in MPa Test pressure, pF, in bar, for a design pressure, pD, of: bar 14,1 c 13,8 c bar 17,8 17,5 bar 23,8 23,3 10 bar 29,7 29,1 Number of test pieces the h i ghe s t te s t te mp e ratu re fo r 13,8 c 17,6 23,5 29,3 4,5 c 5,8 7,7 9,6 14,2 21,3 28,3 35,4 13,9 20,8 27,8 34,7 6,8 10,2 13,5 16,9 14,9 22,3 29,7 37,1 14,6 21,8 29,1 36,4 4,8 7,2 9,5 11,9 max + 10) °C with an upper limit of 95 °C However, to match T cl a s s e s a nd i s a l s o s e t at ° C T he hyd ro s tatic s tre s s e s g i ven correspond to the given test temperatures b 20 °C/22 h test to be done in case of failure at 20 °C/1 h or in case of dispute c T he ° C , b a r, ye a rs , co ld wate r re qu i re ment, b ei n g h i ghe r, de te r m i ne s th i s va lue (s e e I S O 76 -1) © ISO 2017 – All rights reserved 11 ISO 15876-3:2017(E) M e l t f l o w r a t e T he melt flow rate (M FR/M VR, melt ma s s -flow rate / melt volume -flow rate) o f the comp ou nd a nd the i nj e c tion-mou lde d fitti ng made from the s a me materia l b atch s l l b e de term i ne d i n accordance with the procedures given in ISO 1133-1 using the temperature and force criteria appropriate to the material ff f of the original compound shall be determined i nvolve d T he d i C omp ari s on of erence b e twe en the M FR/M VR o M F R/M VR of components shall be excluded For PB comp ound s and fitti ngs prep a re d i nj e c tion-mou lde d the i nj e c tion-mou lde d materi a l and the M F R/M VR from pro duc ts blend s of the with M F R/M VR s ame of comp ou nd, i nd ividua l the s ame blend set of conditions (190 °C/2,16 kg or 190 °C/5 kg) of ISO 1133-1 shall be used and the difference between the MFR/MVR values shall not be greater than 30 % Sealing elements T he s e a l i ng element s l l have no de tri menta l e ffe c t on the prop er tie s o f the pip e or fitti ng a nd s l l no t c au s e the te s t as s embly to fai l to form to I S O 76 -5 T he materia l o f the elas tomeric s e a l i ng elements u s e d i n j oi nt as s embl ie s s l l form to E N 81-1 or EN 681-2, as applicable 10 Performance requirements When fitti ngs form i ng to th i s c ument a re j oi nte d to pip e s form i ng to I S O 76 -2 , the fitti ng and the j oi nts sha l l form to I S O 76 -5 I ntende d combi nation s o f materi a l s o f pip e s and fitti ngs , e g PB -R pip e s and PB -H fitti ngs , sh a l l b e given i n the manu fac tu rer ’s c u mentation 11 Marking 11.1 General requirements M arki ng elements s l l b e pri nte d or forme d d i re c tly on the fitti ng i n s uch a way that a fter s torage, handling, and installation (e.g in accordance with CEN/TR 12108 [2] NOTE ) , legibi l ity i s ma i nta i ne d The manufacturer is not responsible for marking being illegible, due to actions such as painting, s c ratch i ng , cover i ng o f the co mp onents or b y u s e o f de tergent, e tc o n the co mp o nents u n le s s agre e d o r s p e c i fie d b y the m a nu fac tu rer M arki ng s l l no t i n iti ate c racks or o ther typ e s o f de fe c ts , wh ich advers ely i n fluence the p er formance o f the fitti ng If printing is used, the colouring of the printed information shall differ from the basic colouring of the fitti ng T he s i z e o f the ma rki ng s l l b e s uch th at the ma rki ng i s legible without magn i fic ation 11.2 Minimum required marking T he m i n i mu m re qu i re d ma rki ng o f the fitti ng i s s p e ci fie d i n 12 Table © ISO 2017 – All rights reserved ISO 876-3 : 01 7(E) T a b l e — M i n i m u m m a r As p ects k i n g f o r f i t Number of this document Manufacturer’s name and/or trademarka Nominal diameter, dn a Nominal wall thickness(es) of the corresponding pipe(s) (for compression or crimped fittings only) Material identification (for fusion fittings only) a Application class combined with design pressure Opacityb Manufacturer’s informationa t i n g s M arking or s ymb ol e.g ISO 15876-3 Name or code e.g 32 e.g 2,9 PB-H or PB-R e.g Class 2/10 bar opaque c a These aspects (where appropriate) must be marked on the fitting All other aspects may be marked on the fitting or alternatively put on to a label supplied with the fittings b I f declared by the manu facturer c To provide traceability, the following details shall be given: — the production period, year and month, in figures or in code; — a name or code for the production site if the manufacturer is producing at different sites 1 Additional marking The fitting types A or B shall be marked on the package © ISO 2017 – All rights reserved 13 ISO 876-3 : 01 7(E) Bibliography [1] ISO/TS 15876-7, Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 7: Guidance for the assessment o f formity [2] CEN/TR 12108, Plastics piping systems — Guidance for the installation inside buildings of pressure 14 © ISO 2017 – All rights reserved piping systems for hot and cold water intended for human consumption