© ISO 2017 Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 2 Pipes Systèmes de canalisations en plastique pour les installations d’eau chaude et froide — Polybutè[.]
INTERNATIONAL STANDARD ISO 15876-2 Second edition 2017-01 Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 2: Pipes Systèmes de canalisations en plastique pour les installations d’eau chaude et froide — Polybutène (PB) — Partie 2: Tubes Reference number ISO 15876-2:2017(E) © ISO 2017 ISO 15876-2:2017(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 15876-2:2017(E) Contents Page Foreword iv Introduction v Scope Normative references Terms and definitions, symbols and abbreviated terms Pipe material 4.1 4.2 General Evaluation of σLPL-curves f I nfluence o n water intended o r human co ns ump tio n General characteristics 5.1 Appearance O p acity Geometrical characteristics 10 Mechanical characteristics 10 Physical and chemical characteristics 10 Performance requirements 11 Marking 11 6.1 6.2 General Dimensions of pipes 6.2.1 Outside diameters 6.2.2 Wall thicknesses and their tolerances 10.1 General requirements 11 10.2 Minimum required marking 12 Annex A (normative) Derivation of Scalc,max 13 Bibliography 16 © ISO 2017 – All rights reserved iii ISO 15876-2:2017(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 15876-2 was prepared by the European Committee Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping 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 15876-2:2003), 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 It also incorporates the Amendment ISO 15876-2:2003/Amd 1:2007 A list of all parts in the ISO 15876 series can be found on the ISO website iv © ISO 2017 – All rights reserved ISO 15876-2 :2 017(E) Introduction The System Standard ISO 15876, o f which this document is Part 2, 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 material and components, other than pipes, are specified in ISO 15876-1 and ISO 15876-3 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 pipes 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 15876-2:2017(E) Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 2: Pipes Scope T h i s c u ment s p e ci fie s the cha rac teri s tics o f pip e s be used for ho t a nd i ntende d for for p olybutene -1 (PB -1) pipi ng s ys tem s i ntende d to cold water i n s ta l lation s with i n bu i ld i ngs huma n s ump tion (dome s tic s ys tem s) , and for the for conveyance o f water whe ther or no t he ati ng s ys tem s , under de s ign pre s s u re s and temperatures appropriate 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), design pressures and pipe dimension classes For values of TD, Tmax and Tmal in excess of those in ISO 15876-1, this document does 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 te s t p a rame ters for the te s t me tho d s re ferre d to i n th i s c ument I n conj u nc tion with the o ther p a r ts o f I S O 76 , th i s c u ment i s appl ic able to PB pip e s , thei r j oi nts and to j oi nts with comp onents o f PB , o ther pla s tic s a nd non-pl as tics materi a l s i ntende d to b e u s e d hot and cold water installations for I t i s appl ic able to pip e s with or without (a) b a rrier layer(s) NO TE I n the c a s e o f p l a s tic s pip e s p rovide d with a th i n b a r r ier l ayer, e g to pre vent o r gre atl y d i m i n i s h the diffusion of gases and the transmission of light into or through the pipe wall, the design stress requirements are to ta l l y me t b y the b a s e p ol ymer (PB) 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 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics — Part 1: Standard method 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 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of the resistance to internal pressure — Part 2: Preparation of pipe test pieces ISO 2505, Thermoplastics pipes — Longitudinal reversion — Test method and parameters ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions ISO 7686, Plastics pipes and fittings — Determination of opacity © ISO 2017 – All rights reserved ISO 15876-2:2017(E) ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation ISO 15876-1:2003, Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 1: General ISO 15876-3, Plastics piping systems for hot and cold water installations — Polybutene (PB) — Part 3: Fittings ISO 15876-5, Plastics piping systems for hot and cold water installations — Polybutene (PB) —Part 5: Fitness for purpose o f the system Terms and definitions, symbols and abbreviated terms For the purposes o f this document, the terms and definitions, symbols and abbreviated terms given in ISO 15876-1 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 Pipe material 4.1 General The pipe material from which the pipe is made shall comply with ISO 15876-1 A fter extrusion or moulding, PB undergoes a crystalline phase transition (usually called ageing) be fore it develops its final properties The minimum required transition time depends on temperature and product characteristics The same final material per formance is obtained once completion o f crystalline phase transition is achieved, irrespective o f transition conditions For quality control purposes, there fore, test specimens shall be taken immediately a fter processing and be conditioned in accordance with recommendations obtained from the compound supplier prior to testing The crystalline phase transition is dependent on time and temperature For guidance a minimum time o f five days for PB-H and one day for PB-R should be allowed at 23 °C, unless accelerated ageing is performed NOTE The crystalline phase transition can be considerably accelerated upon applying higher hydrostatic pressure of approx kbar to kbar Accelerated ageing at higher pressure can be accepted if test results can be proven reproducible and equal to those obtained at atmospheric pressure Because o f the slow crystallization, trans formation and shrinkage which takes places a fter PB-H and PB-R plastics are cooled from the melt, physical testing should be delayed a fter extrusion or moulding until this morphological transition is complete 4.2 Evaluation of σLPL-curves The pipe material shall be evaluated in accordance with ISO 9080 or equivalent where internal pressure tests are made in accordance with ISO 1167-1 and ISO 1167-2 to find the σLPL -values The σLPL -value thus determined shall at least be as high as the corresponding values of the reference curves given in Figure or Figure NOTE One equivalent way o f evaluation is to calculate the σLPL -value for each temperature (e.g 20 °C, 60 °C to 70 °C and 95 °C) individually © ISO 2017 – All rights reserved ISO 15876-2 :2 017(E) The reference curves in Figure i n the temp eratu re range o f 10 ° C to 10 ° C the temp eratu re range o f 10 ° C to ° C for PB -R are derive d from the for PB -H and i n fol lowi ng formu l ae: Figure in First branch (i.e the left-hand portion of the lines as shown in Figure and Figure 2) for PB-H: lo g t = −43 0, 866 − ⋅ lg σ 125 010 T + 73 89 2, T + 0, ⋅ lo g σ (1) for PB-R: lo g t = −3 67, 80 − 6, ⋅ lg σ T + 45 40, T + 45, ⋅ log σ (2) Second branch (i e the right-hand portion of the lines as shown in Figure 1) for PB-H: lo g t = −1 9, 89 − 62, T ⋅ lg σ + 52 5 6, 48 T + 88, 67 ⋅ lo g σ (3) To demonstrate conformance to the reference lines, pipe samples shall be tested at following temperatures and at various hoop stresses such that, at each of the temperatures given, at least three failure times fall in each of the following time intervals: — temp eratu re s ° C; ° C to 70 ° C; ° C; — time intervals 10 h to 100 h, 100 h to 000 h, 000 h to 760 h and above 760 h In tests lasting more than 760 h, once failure is reached at a stress and time at least on or above the f f f in accordance with ISO 1167-1 and ISO 1167-2 re erence l i ne, any ti me a ter th at may b e s idere d a s the a i lu re ti me Te s ti ng s hou ld b e ca rrie d out C on formance with the re ference l i ne s shou ld b e demon s trate d by plo tti ng the i nd ividua l e xp eri menta l results on the graph At least 97,5 % of them should lie on or above the reference line © ISO 2017 – All rights reserved ISO 15876-2:2017(E) 50 40 30 Y 20 10 ˚C 20 ˚C 30 ˚C 40 ˚C 50 ˚C 60 ˚C 70 ˚C 10 80 ˚C 90 ˚C 95 ˚C 110 ˚C 10 25 50 100 X2 1 10 100 1000 10000 100000 1000000 X1 Key X1 time, t1 , to fracture, in hours X2 time, t2 , to fracture, in years Y hoop stress, σ, in megapascal Figure — Reference curves for expected strength of polybutene homopolymer (PB-H) © ISO 2017 – All rights reserved ISO 15876-2:2017(E) 50 40 30 Y 20 10 ˚C 20 ˚C 30 ˚C 40 ˚C 50 ˚C 60 ˚C 10 70 ˚C 80 ˚C 90 ˚C 95 ˚C 110 ˚C 10 25 50 100 X2 1 10 100 1000 10000 100000 1000000 X1 Key X1 time, t1 , to fracture, in hours X2 time, t2 , to fracture, in years Y hoop stress, σ, in megapascal Figure — Reference curves for expected strength of polybutene random copolymer (PB-R) 4.3 Influence on water intended for human consumption The material shall conform to ISO 15876-1 © ISO 2017 – All rights reserved ISO 15876-2:2017(E) General characteristics 5.1 Appearance When viewe d without magn i fication, the i nterna l and ex terna l s u r face s o f pip e s sha l l b e s mo o th, cle an and fre e from s cori ng , c avitie s , and o ther s u r face de fe c ts to a n ex tent that wou ld prevent form ity to this document The material shall not contain visible impurities Slight variations in the appearance of the colou r sh a l l b e p erm itte d T he end s o f the pip e sh a l l b e c ut cle an ly and s quare to the a xi s o f the pip e 5.2 Opacity Polybutene pip e s that are de cla re d to b e op aque s l l no t tran s m it more than , % o f vi s ible l ight, when tested in accordance with ISO 7686 Geometrical characteristics 6.1 General Dimensions shall be measured in accordance with ISO 3126 The maximum calculated pipe value, Scalc,max, for the applicable class of service condition and design pressure, pD, is given in Table and Table f or PB -H and PB -R, re s p e c tively Design pressure pD a b bar 10 Table — Scalc,max-values for PB-H Class 10,9 b 9,5 7,1 5,7 Application Class Class Scalc,max -values a 10,9 b 10,9 b 8,4 9,1 6,3 6,8 5,0 5,4 Class 10,9 b 7,2 5,4 4,3 T he va lue s a re ro u nde d wn to the fi r s t p l ace o f de c i m a l s T he ° C , b a r, ye a rs , co ld water re qu i re ment, b ei n g h i gher, de te r m i ne s th i s va lue (see ISO 15876-1) © ISO 2017 – All rights reserved ISO 15876-2:2017(E) Design pressure pD a b bar 10 Table — Scalc,max-values for PB-R Application Class Class Class Scalc,max -values a 10,9 b 10,8 8,5 7,2 6,4 5,4 5,0 4,3 10,9 b 8,6 6,4 5,1 Class 10,3 6,8 5,1 4,1 T he va lue s a re ro u nde d wn to the fi rs t p l ace o f de c i m a l s T he ° C , b a r, ye a r s , co ld wate r re qu i rement, b e i n g h i ghe r, de ter m i ne s th i s va lue (see ISO 15876-1) NOTE The derivation of Scalc,max is provided in Annex A The method described takes account of the properties of PB under the service conditions of different classes given in ISO 15876-1 T he va lue s o f outs ide d ia me ter and/or wa l l th ickne s s apply to the p olybutene pip e a nd are exclu s ive o f add itiona l outs ide layers For pip e s with b arrier l ayers , the va lue s o f outs ide d i ame ter a nd wa l l th ickne s s may apply to the fi n i she d pro duc t, i nclud i ng the b arrier l ayer, provide d th at the th ickne s s o f the outs ide b arrier layer, i nclud i ng a ny ad he s ive layer, i s ≤ ,4 m m and the de s ign ca lc u lation u s i ng the values of outside diameter and wall thickness of base pipe (PB) meet the Scalc,max values according to Table or Table The manufacturer shall state the dimensions and tolerances of the base pipe in his documentation when different from Tables to P ip e s with document non- c i rc u la r cro s s s e c tion a re p erm itte d i f they form to the requi rements o f th i s 6.2 Dimensions of pipes 6.2.1 Outside diameters For the applicable pipe dimension class, the mean outside diameter, dem, of a pipe shall conform to Table 3, Table 4, Table or Table 6, as applicable 6.2.2 Wall thicknesses and their tolerances For a ny p ar tic u lar cla s s o f s er vice cond ition, de s ign pre s s ure and nom i na l s i z e, the m i n i mu m wa l l thickness, emin less than the values of Scalc,max given in Table or Table , sh a l l b e cho s en i n s uch a way that the corre s p ond i ng S series or Scalc-value is equal to or , re s p e c ti vely f 6.1), shall conform to Table 3, Table 4, Table or Table 6, as applicable, in relation to the pipe series S and Scalc f wall thickness of 1,9 mm The tolerance on the wall thickness, e, shall conform to Table For the appl ic able pip e d i men s ion cla s s , the wa l l th ickne s s o the b a s e pip e or fi n i s he d pip e (s e e -va lue s , re s p e c tively However, pip e s i ntende d to b e j oi ne d to ge ther b y © ISO 2017 – All rights reserved u s ion s l l h ave a m i n i mu m ISO 15876-2:2017(E) Table — Pipe dimensions for dimension class A (sizes conform to ISO 4065 and are applicable for all classes of service conditions) Nominal size DN/OD a Nominal outside diameter dn Mean outside diameter dem,min 12,0 16,0 20,0 Dimensions in millimetres Pipe series S 6,3 S5 S4 S 3,2 S 10 S8 12,3 16,3 20,3 1,3 a 1,3 a 1,3 a and en 1,3 a 1,3 1,5 1,5 1,9 1,4 1,8 2,3 1,7 2,2 2,8 dem,max Wall thicknesses e 12 16 20 12 16 20 25 32 40 25 32 40 25,0 32,0 40,0 25,3 32,3 40,4 1,3 1,6 1,9 1,5 1,9 2,4 1,9 2,4 3,0 2,3 2,9 3,7 2,8 3,6 4,5 3,5 4,4 5,5 50 63 75 50 63 75 50,0 63,0 75,0 50,5 63,6 75,7 2,4 3,0 3,6 3,0 3,8 4,5 3,7 4,7 5,6 4,6 5,8 6,8 5,6 7,1 8,4 6,9 8,6 10,3 90 110 125 90 110 125 90,0 110,0 125,0 90,9 111,0 126,2 4,3 5,3 6,0 5,4 6,6 7,4 6,7 8,1 9,2 8,2 10,0 11,4 10,1 12,3 14,0 12,3 15,1 17,1 140 160 140 160 140,0 160,0 141,3 161,5 6,7 7,7 8,3 9,5 10,3 11,8 12,7 14,6 15,7 17,9 19,2 21,9 1,3 1,3 1,3 1,3 non-preferred wall thickness of 1,1 mm is permitted for dimension dn = 12 Table — Pipe dimensions for dimension class B1 (sizes based on copper pipe sizes and applicable for all classes of service conditions) Dimensions in millimetres Nominal Nominal Mean outside diameter size outside DN/OD diameter S 10 S8 Pipe series S 6,3 S5 S4 S 3,2 1,3 1,3 1,7 1,4 1,6 2,0 2,0 2,4 3,1 3,9 2,4 3,0 3,8 4,8 Wall thicknesses 10 12 15 dn 10 12 15 dem,min dem,max 10,2 12,2 15,2 1,3 1,3 1,3 1,3 1,3 1,3 and en 1,3 1,3 1,3 1,3 1,3 1,3 18 22 28 35 18 22 28 35 17,9 21,9 27,9 34,9 18,2 22,2 28,2 35,4 1,3 1,3 1,3 1,7 1,3 1,3 1,6 2,0 1,3 1,6 2,0 2,6 9,9 11,9 14,9 e 1,6 2,0 2,5 3,2 © ISO 2017 – All rights reserved ISO 15876-2:2017(E) Table — Pipe dimensions for dimension class B2 (sizes based on copper pipe sizes and applicable for all classes of service conditions) Dimensions in millimetres Nominal size DN/ OD Nominal outside diameter dn 14,7 21 27,4 34 Mean outside diameter dem,min 14,7 21 27,4 34 14,63 20,98 27,33 34,08 Wall thicknesses e and e n Scalc 1,6 2,05 2,6 3,15 4,1 4,6 4,8 4,9 dem,max 14,74 21,09 27,44 34,19 Table — Pipe dimensions for dimension class C (non-preferred pipe sizes used for example for heating systems) Dimensions in millimetres Nominal Nominal outside size DN/OD diameter Mean outside diameter Wall thicknesses Scalc 12 14 15 16 dn 12 14 15 16 dem,min dem,max e and e n 2,0 2,0 2,0 2,0 2,5 3,0 3,2 3,5 17 18 20 17 18 20 17,0 18,0 20,0 17,3 18,3 20,3 2,0 2,0 2,0 3,8 4,0 4,5 12,0 14,0 15,0 16,0 12,3 14,3 15,3 16,3 Table — Tolerance on wall thicknesses Dimensions in millimetres Minimum wall thickness Tolerance a Minimum wall thickness Tolerance a e x e x > 1,0 2,0 3,0 4,0 2,0 3,0 4,0 5,0 0,3 0,4 0,5 0,6 > 11,0 12,0 13,0 14,0 5,0 6,0 7,0 8,0 6,0 7,0 8,0 9,0 0,7 0,8 0,9 1,0 9,0 10,0 10,0 11,0 1,1 1,2 ≤ ≤ 12,0 13,0 14,0 15,0 1,3 1,4 1,5 1,6 15,0 16,0 17,0 18,0 16,0 17,0 18,0 19,0 1,7 1,8 1,9 2,0 19,0 20,0 21,0 20,0 21,0 22,0 2,1 2,2 2,3 The tolerance is expressed in the form +0x mm, where “x” is the value of the tolerance given The level of the tolerances conforms to Grade V in ISO 11922-1 a © ISO 2017 – All rights reserved ISO 15876-2:2017(E) Mechanical characteristics When te s te d i n accorda nce with the te s t me tho d s a s s p e c i fie d i n Table using the indicated parameters, the pip e sha l l with s tand the hyd ro s tatic ( ho op) s tre s s without bu rs ti ng I n the c a s e o f pip e s with (a) b arrier layer(s) , the te s t s l l b e c a rrie d out on te s t pie ce s pro duce d without the b arrier layer(s) P rior to the del iver y, the pip e s sh a l l me e t the me ch an ic a l cha rac teri s tic s Table — Mechanical characteristics of pipes Characteristic Requirement Resistance to internal pressure No failure during the test period Test parameters for the individual tests Hydrostatic Test temp Test period Number of (hoop) stress test pieces °C h MPa 15,5 15,2 6,5 6,2 6,0 15,3 15,0 5,5 5,2 5,0 PB-H PB-R a b 1a 22 22 165 000 1a 22 22 165 000 Test parameters for all tests Sampling procedure f Orientation of test piece Typ e o 20 20 95 95 95 20 20 95 95 95 end c ap Typ e o f te s t Test method ISO 1167-1/ ISO 1167-2 3 3 3 3 3 b Typ e a) No t s p e c i fie d Water-in-water I n c a s e o f d i s p ute , te s ts s h a l l b e ne at ° C/2 h 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 Physical and chemical characteristics When te s te d i n accorda nce with the te s t me tho d s a s s p e c i fie d i n the pipe shall conform to the requirements given in this table Table using the indicated parameters, P rior to the del iver y, the pip e s sh a l l me e t the phys ic a l and chem ic a l ch arac teri s tics 10 © ISO 2017 – All rights reserved ISO 15876-2:2017(E) Table — Physical and chemical characteristics of pipes Characteristic Longitudinal reversion Requirement Test parameters Parameter Temperature Duration of exposure for: en mm < en Number of test pieces No bursting Sampling procedure during the test End cap period Orientation ≤2 % ≤ mm ≤ 16 m m T her m a l s tab i l ity b y hyd ro s tatic pre s s u re testing Typ e o f te s t H yd ro s tatic ( ho o p) s tre s s M elt flow rate M F R/ MVR (pipe) c a b c PB-H PB-R Test temperature Test period Number of test pieces 30 % maximum Load difference Test temperature compared to Number of test pieces compound Value 10 ° C 1h 2h a Typ e a) Free Water-in-air 2,4 Mpa 1,8 MPab 760 h 2,16 kg or kgd Test method Method B of ISO 2505 (oven test) ISO 1167-1/ ISO 1167-2 10 ° C ISO 1133-1 19 ° C The sampling procedure is free For guidance, see ISO 15876-7 PB - R s a mp le s s h a l l b e co nd itio ne d at ° C/9 h p r io r to the r m a l s tab i l it y te s ti n g S a mp le s fo r me a s u r i n g M F R/ M VR (me lt m a s s - flo w rate / mel t vo lu me - flo w rate) o f p e l le ts a nd p ip e s h a l l b e ta ke n the s a me co mp o u nd a nd the s a me b atch o f m ater i a l I t i s no t a l lo we d to co mp a re p ip e o r fitti n gs p rep a re d batches with MFR/MVR measured on individual components In case of dispute, 2,16 kg load shall be used fro m fro m a b lend o f d Performance requirements When pip e s form i ng to th i s c u ment a re j oi nte d to e ach o ther or to comp onents form i ng to I S O 76 -3 , the pip e s a nd the j oi nts s l l form to I S O 76 -5 10 Marking 10.1 General requirements M a rki ng de tai l s s l l b e pri nte d or forme d d i re c tly on the pip e no le s s th an once p er me tre i n s uch a way that a fter s torage, hand l i ng and i n s ta l l ation (e g i n accorda nce with C E N/ T R 10 is maintained NOTE [11] ) , legibi l ity The manufacturer is not responsible for marking being illegible, due to actions such as painting, s c ratch i ng , co ver i ng o f the co mp o nents or b y u s e o f de tergent, e tc o n the comp onents u n le s s agre e d or s p e c i fie d b y the m a nu fac tu rer M a rki ng sh a l l no t i n iti ate cracks 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 pipe I f pri nti ng i s u s e d, the colou ri ng o f the pri nte d i n formation s l l d i ffer cle arly of the pipe from the b as ic colou ri ng T he s i z e o f the marki ng sh a l l b e s uch that the marki ng i s legible without magn i fic ation © ISO 2017 – All rights reserved 11 ISO 876-2 : 01 7(E) 0.2 Minimum required marking T he m i n i mu m re qu i re d ma rki ng o f the pip e i s s p e ci fie d i n Table 10 Table 10 — M inimum required marking As p ects Number of this document Manufacturer’s name and/or trade mark Nominal outside diameter and nominal wall thickness Pipe dimensions class Material Application class combined with design pressure O p ac ity a Manufacturer’s information a b M arking or s ymb ol e.g ISO 15876 Name or code e.g 32 × 2,9 e.g A PB-H or PB-R e.g Class 2/10 bar e.g opaque b I f de cl a re d b y the m a nu fac tu rer Fo r p ro vi n g trace ab i l it y, the — fo l lo wi n g de ta i l s s h a l l b e g i ve n: the p ro duc tio n p e r io d , ye a r a nd mo nth , i n fi g u re s o r i n co de; — a name or code for the production site if the manufacturer is producing at different sites 12 © ISO 2017 – All rights reserved ISO 876-2 : 01 7(E) Annex A (normative) S Derivation of A.1 c a l c , m a x General This Annex details the principles regarding the calculation of Scalc,max-values and, hence, of minimum wall thicknesses, emin, of pipes relative to the classes of service conditions (application classes) given in ISO 15876-1 and the applicable design pressure, pD A.2 Design stress The design stress, σD, for a particular class of service conditions (application class) is calculated from Formula (1) or Formula (2) and Formula (3) (see 4.2) using Miner’s rule in accordance with ISO 13760 and taking into account the applicable class requirements given in of ISO 15876-1:2003, Table and the service coe fficients given in Table A.1 T a b l e A — Temperature O v e r a O l l v e s r e a l r l v s PB-H 1,5 1,3 1,0 1,25 °C TD Tmax Tmal Tcold i e c r e v ( d i c e e s i ( d g e n ) s i g c o n ) C e c f f i o e c f i f i e c i n e t s n t PB-R 1,5 1,3 1,0 1,25 The resulting design stress, σD, has been calculated relative to each class and is given in Table A.2 Table A — D esign stress Design stress a σD Application class 20 °C for 50 y PB-H 5,72 5,04 5,46 4,30 10,91 MPa PB-R 5,16 5,12 4,33 4,13 10,92 Values given are rounded down to the second place of decimals (i.e the nearest 0,01 MPa) a A.3 Derivation of maximum value of Scalc,max is the smaller value of © ISO 2017 – All rights reserved Scalc (Scalc,max) 13 ISO 15876-2:2017(E) either σ DP (A.1) pD where σDP pD or σ is the design stress in the pipe material taken from Table A.2 is the design pressure of bar or bar or bar or 10 bar, as applicable, expressed in megapascals (MPa) i n megap as c a l s (M Pa) ; (A.2) cold p where D σcold i s the de s ign s tre s s at ° C relative to a s er vice l i fe o f ye a rs; is the design pressure of 10 bar, expressed in megapascals (MPa) The values of Scalc,max relative to each class of service condition (see ISO 15876-1) are given in Table A.3 and Table A.4 pD Table A.3 — Scalc,max values for PB-H pD a b bar 10 Class 10,9 b 9,5 7,1 5,7 Class Application Class Scalc,max-values a 10,9 b 10,9 b 8,4 9,1 6,3 6,8 5,0 5,4 Class 10,7 7,1 5,3 4,3 T he va lue s a re ro u nde d wn to the fi r s t p l ace o f de c i m a l s T he ° C , b a r, ye a rs , co ld wate r re qu i re ment, b e i n g h i gher, de te r m i ne s th i s va lue (s e e I S O 76 -1 : 0 , C l au s e 4; b a s e d o n σcold /p D) Table A.4 — Scalc,max values for PB-R pD a b bar 10 Class 10,9 b 8,6 6,4 5,1 Application Class Class Scalc,max-values a 10,9 b 10,8 8,5 7,2 6,4 5,4 5,1 4,3 10,3 6,8 5,1 4,1 T he va lue s a re ro u nde d wn to the fi r s t p l ace o f de c i m a l s T he ° C , b a r, ye a rs , co ld wate r re qu i re ment, b e i n g h i gher, de te r m i ne s th i s va lue (s e e I S O 76 -1 : 0 , C l au s e 4; b a s e d o n 14 Class σcold /p D) © ISO 2017 – All rights reserved