DEUTSCHE NORM April 1996 Thermoplastics materials for pipes and fittings — for pressure applications DIN Classification, designation and overall service (design) coetficient = English voraon of DINENISO 12162 EN ISO 12162 ‘This standard incorporates the English version of ISO 12162. ICS 28,040.20; 28.040.45; 89.080.20 Descriptors: Thermoplastics, classification, plastics, pipes, pipe fittings. ‘Thermoplastische Werkstoffe fUr Rohre und Formsticke bel Anwendungen unter Druck: Klassifizierung und Werkstotf- kennzeichnung, Gesamtbetriebs(berechnungs)koeffizient (ISO 12162:1995) European Standard EN ISO 12162: 1995 has the status of a DIN Standard. | 4 comma is used as the decimal marker i =| National foreword 4] This standard has been published in accordance with a decision taken by CEN/TC 155 to adopt, without alteration, | | Intemational Standard ISO 12162 as a European Standard. {| The responsible German body involved in its preparation was the NormenusschuB Kunststoffe (Plastics Standards 5 | Commitee), Technical Committee. Koordnierung der Kunststo-Roty-Normung § | The DIN standards corresponding tothe International Standards referred to in clause 2 ofthe EN are as follows: 2] 180 Standard DIN Standard isos DIN 328-2 180.497 DING28-1 180 1043-1 DIN7728-1 Standards referred to {and not included in Normative references) DIN 328-1 Preferred numbers and preferred number series; basic, calculated and rounded values DIN 323-2 Preferred numbers and preferred number series; introduction DIN 7728-1. Plastics; symbols for polymers and their special characteristics © No par ot EN comprises 6 pages. a DINEN ISO 12162 EnglEUROPEAN STANDARD EN ISO 12162 NORME EUROPEENNE EUROPAISCHE NORM une 1995, ICS 28.040.20; 28,040.45; 83.080.20 Descriptors: Thermoplastics, classification, plastics, pipes, pipe fittings. English version Thermoplastics materials for pipes and fittings for pressure applications Classification and designation Overall service (design) coefficient (ISO 12162:1995) Matiares thermoplastiques pour tubes et —_Thermoplastische Werkstoffe fur Rohre accords pour applications avec pression; und Formstticke bei Anwendungen unter Classification et désignation; coefficient Druck; Klassifizierung und Werkstoffkenn- global de service (de calcul) zeichnung, Gesamtbetriebs(berechnungs)- (so 12162:1995) kosffizient (ISO 12 162:1995) “This European Standard was approved by CEN on 1995-05-15 and is identical to the ISO Standard ag referred to. CEN members are bound to comply with the CEN/CENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration, Up-to-date lists and bibliographical references concerning such national standards may be ‘obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibilty of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. ‘GEN members are the national standards bodies of Austra, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, ‘Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europaisches Komitee fr Normung Central Secretari tue de Stassart 36, B-1050 Brussels © 1995. Copyright reserved to all CEN members. Ret. No. EN ISO 12162:1995 EPage 2 EN ISO 12162:1995 Foreword International Standard 180 12162:1995 Thermoplastics materials for pipes and fittings for pressure applications; classification and designation; overall service (design) coefficient, which was prepared by ISO/TC 61 ‘Plastics’ of the International Organization for Standardization (ISO), has been adopted by CEN/TC 155 ‘Plastics piping systems and ducting systems’ as a European Standard. ‘This European Standard shall be given the status of a national standard, elther by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by December 1995 at the latest. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standar Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and United Kingdom, Endorsement notice ‘The text ofthe International Standard ISO 12 162: 1995 was approved by CEN as @ European Standard without any moditi- cation. Introduction ISO/TR 9080 states in 0.2.7 of its introduction that methods for using aizus andjor ¢,¢, t0 arrive at the allowable design stresses stil had to be considered. Seivice factors or safety factors have to be introduced This International Standard uses the lower confidence limit of the long- term strength, a,c, a8 4 basis for material classification and designation and defines the telation with the design stress. The service factors are expressed in the overall service (design) coefficient. The final overall ser- vice (design) coefficients are given in the product or system standards.1 Scope This International Standard establishes the classi- fication of thermoplastics materials in pipe form and specifies the material designation. It also gives a method for calculating the design stress. It applies to materials intended for pipes andjor fit- tings for pressure applications The classification, the material designation, and the calculation method are based on the resistance to internal pressure with water at 20°C in water for 50 years, derived by extrapolation using the method given in ISO/TR 9080 2 Normative referenc The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi cation, the editions indicated were valid, All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and ISO maintain registers of cur- rently valid International Standards. |SO 3:1973, Preferred numbers — Series of preferred numbers. 'SO 497:1973, Guide to the choice of series of pre- ferred numbers and of series containing more rounded values of preferred numbers, (SO 1043-1:1987, Plastics — Symbols — Part 1 Basic polymers and their special characteristics. Page 3 EN ISO 12162:1995 ISO/TR 9080:1992, Thermoplastics pipes for the transport of fluids — Methods of extrapolation of hydrostatic stress rupture data to determine the long-term hydrostatic strength of thermoplastics pipe materials. 3 Defi ions For the purposes of this International Standard, the following definitions apply. 3.1 long-term strength at 20 °C for 50 years, crust Quantity with the dimensions of stress, in megapascals, which can be considered as a property of the material and represents the 50 % lower confi- dence limit for the long-term strength. It is equal to the mean strength or predicted mean strength at 20°C for 50 years with internal pressure with water. 3.2. lower confidence limit at 20 °C for 50 years, ‘aici: Quantity with the dimensions of stress, in megapascals, which can be considered as a property of the material and represents the 97,5 % lower con- fidence limit of the mean long-term strength at 20 °C. for 50 years with intemal pressure with water. 3.3. minimum required strength, MRS: Value of acu. rounded down to the next smaller value of the R10 series or of the R20 series conforming to ISO 3 and ISO 497, depending on the value of ac. 3.4 overall service (design) coefficient, C: Overall coefficient with a value greater than 1, which takes into consideration service conditions as well as properties of the components of a piping system other than those represented in the lower confidence limit. NOTE 1 Minimum values of C for various materials are diven in clause 5.Page 4 EN ISO 12162:1995 3.5 design stress, o,: Allowable stress for a given application. It is derived by dividing the MRS by the coefficient C, then rounding to the next lower value in the R20 series, ie [MRS] a= 4 Classification of materials in pipe form ‘A thermoplastics material shall be classified by the values of its o,c,, rounded down to the next smaller value of the R10 series when oe, is less than 10 MPa or to the next smaller value of the R20 series when oc. i8 greater than or equal to 10 MPa. This, value constitutes the MRS. ‘The classification number for @ thermoplastics ma- terial shall be 10 times the MRS expressed in megapascals (see table 1), Table 1 — Classification Range of lower ‘Minimum required aes confidence limits strength oes 2 a MRS MPa MPa 1 oa< 1.24 1 10 1,28< a5 1.59 125 16 oi< 1,99 16 2s aq < 2.49 20 28< a5 314 5 3,18 < 10.¢ 3.99 315, 4s 04,5 499 40 8 01,5 6.29 50 63 aq < 7.99 63 8x o15 9,99 80 10< o.q< 11,19 10 100 M2 aieu< 12.49 12 2 12,5< aiq.< 13,99 125 125 1 oa < 18,99 14 140 16< oq < 17.98 16 160 18s aq 19,99 18 180 205 aa < 22.98 20 200 22,8 a.¢,< 24,99 24 224 25< 9 < 27.98 28 250 28< a. < 31,49 28 280 3S< o.< 35.49 318 318 35.8< a1, < 39.99 355 355 40< o.ci< 44,99, 40 ‘400 45 1c, < 49,99 45 450 505 ei. < 54,99 50 500 1) If the classification number is not an integer, a full stop is used instead of a5. Setting of C values in the product (system) standards ‘The value(s) of C (see 3.4) is (are) specified in the ap- plicabie product (system) standard. The value(s) of C at 20 °C shall be equal to or, if ap- propriate, greater than the minimum value given in table 2, which is established for static water pressure at 20 °C for 60 years, to take account of the following considerations: a) specific requirements for the products, such as additional stresses and other unquantifiable ef- fects which are considered to arise in the appli- cation, for example dynamic loading; b). the influence of temperature, time and environ- ment inside or outside the pipe if different from. 20 °C, 60 years and water respectively; ©) standards relating to the MRS, for temperatures other than 20 °C. The minimum values of C (see 3.4) for various ma- terials are given in table 2. Table 2 — Minimum values of C Matai a 7a 7 * lee Pe woes ie ex iz PP coe ie Pe homopoter ii ree 18 neu 3 PYF ccpohmer ia PYF tomo ts Page § EN ISO 12162:1995 6 Calculation of design stress Unless otherwise specified in the product (system) standards, the design stress, o,, shall be calculated Using the following equation and rounded to the next lowest value in the R20 series [vrs] a= where {MRS} is the value of the minimum required strength (see 3.3); Cis the applicable value of C, in accordance with clause 5. 7 Designation of mater Is in pipe form ‘The designation shall be given by a combination of the following: — the symbol of the material in accordance with 'SO 1043-1; — its classification number in accordance with clause 4. EXAMPLE A PVCU with an MRS of 25 MPa is designated as follows: PVC-U 250 8 Marking Unless otherwise specified in the product (system) standards, the tubes and fittings shall be marked with the following information: — the type and class of the material in accordance with the designation specified in clause 7; and, for fittings, — whether the material was tested in extruded or injection moulded pipe form,