1、July 2015 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 7
2、5.200; 23.040.01!%D9+“2332208www.din.deDDIN ISO 16486-2Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing andmechanical jointing Part 2: Pipes (ISO 16486-2:2012 + AMD 1:2014),English translation of DIN ISO 16486-2:2015-07Kunstst
3、off-Rohrleitungssysteme fr die Gasversorgung Rohrleitungssysteme aus weichmacherfreiem Polyamid (PA-U) mit Schweiverbindungenund mechanischen Verbindungen Teil 2: Rohre (ISO 16486-2:2012 + AMD 1:2014),Englische bersetzung von DIN ISO 16486-2:2015-07Systmes de canalisations en matires plastiques pour
4、 la distribution de combustiblesgazeux Systmes de canalisations en polyamide non plastifi (PA-U) avec assemblages parsoudage et assemblages mcaniques Partie 2: Tubes (ISO 16486-2:2012 + AMD 1:2014),Traduction anglaise de DIN ISO 16486-2:2015-07www.beuth.deDocument comprises 16 pagesIn case of doubt,
5、 the German-language original shall be considered authoritative.07.15A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms, definitions, symbols and abbreviated terms 7 4 Com
6、pound 7 5 Appearance 7 6 Geometrical characteristics 7 6.1 Measurement of dimensions 7 6.2 Mean outside diameters, out-of-roundness and their tolerances 7 6.3 Wall thicknesses and tolerances .8 7 Mechanical characteristics .9 7.1 Conditioning .9 7.2 Requirements .9 8 Physical characteristics 11 8.1
7、Conditioning .11 8.2 Requirements .11 9 Marking .1 1Annex A (informative) Butt fusion procedure for jointing PA-U pipes 13 Bibliography 16 DIN ISO 16486-2:2015-07 2 National foreword This document (ISO 16486-2:2012 + AMD 1:2014) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fi
8、ttings and valves for the transport of fluids”, Subcommittee SC 4 “Plastics pipes and fittings for the supply of gaseous fuels”. The responsible German body involved in its preparation was the DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-05-08 AA Kunst
9、stoff-Rohrleitungssysteme fr die Gasversorgung. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or ISO shall not be held responsible for identifying any or all such patent rights. The start and finish of text introduced or
10、 altered by amendment is indicated in the text by tags !“. DIN ISO 16486 consists of the following parts, under the general title Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing: Part 1: General Part 2
11、: Pipes Part 3: Fittings Part 5: Fitness for purpose of the system Part 6: Code of practice for design, handling and installation For the International Standards referred to in this document there are no national standards available unless they have been published as DIN EN ISO standards with the sa
12、me number, except for those below which correspond as follows: ISO 16486-1 DIN ISO 16486-1 DIN ISO 16486-2:2015-07 3 National Annex NA (informative) Bibliography DIN ISO 16486-1, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointin
13、g and mechanical jointing Part 1: General DIN ISO 16486-2:2015-07 4 IntroductionThin wall thickness unplasticized polyamide (PA-U) pipes and solvent cement joints are used typically for low pressures, while thicker wall thickness pipes and butt fusion, electrofusion or mechanical joints are typicall
14、y used for high pressures.For technical and safety reasons, it is not possible to mix the components of the two types of piping system (thin wall thickness pipes cannot be jointed by butt fusion or mechanical joints and vice versa). In particular, solvent cement joints must not be used for jointing
15、for high pressure piping systems.So for the time being, the standardization programme dealing with unplasticized polyamide (PA-U) piping systems for the supply of gaseous fuels is split into two series of International Standards, with one series (ISO 17467) covering piping systems the components of
16、which are connected by solvent cement jointing and the other (ISO 16486) the components of which are connected by fusion jointing and/or mechanical jointing. When more experience will be gained from the field, it might be reasonable to merge the ISO 17467 series and the ISO 16486 series in one singl
17、e series applicable to PA-U piping systems.A similar series (ISO 17135) for fusion and mechanically jointed plasticized polyamide (PA-P) piping systems is in preparation.Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and mec
18、hanical jointing Part 2: Pipes DIN ISO 16486-2:2015-07 5 1 ScopeThis part of ISO 16486 specifies the physical and mechanical properties of pipes made from unplasticized polyamide (PA-U) in accordance with ISO 16486-1, intended to be buried and used for the supply of gaseous fuels. It also specifies
19、the test parameters for the test methods to which it refers.ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion jointing and/or mechanical jointing.In addition, it lays down dimensional characteristics and requirements for the marking of pipes.Pipes conform
20、ing to this part of ISO 16486 are jointed typically by using mechanical, electrofusion or butt fusion (see Annex A) techniques, but not by solvent cement jointing.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for
21、 its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 291, Plastics Standard atmospheres for conditioning and testingISO 307, Plastics Polyamides Determination of viscosity
22、numberISO 1133-2, Plastics Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics Part 2: Method for materials sensitive to time-temperature history and/or moistureISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determi
23、nation of the resistance to internal pressure Part 1: General methodISO 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 piecesISO 2505, Thermoplastics pipes Longitudinal reversion
24、 Test method and parametersISO 3126, Plastics piping systems Plastics components Determination of dimensionsISO 6259-1, Thermoplastics pipes Determination of tensile properties Part 1: General test methodISO 6259-3, Thermoplastics pipes Determination of tensile properties Part 3: Polyolefin pipesISO
25、 11922-1:1997, Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric seriesISO 13477, Thermoplastics pipes for the conveyance of fluids Determination of resistance to rapid crack propagation (RCP) Small-scale steady-state test (S4 test)DIN ISO 16486-2:2015-07 6 I
26、SO 13479, Polyolefin pipes for the conveyance of fluids Determination of resistance to crack propagation Test method for slow crack growth on notched pipesISO 16486-1:2012, Plastics piping systems for the supply of gaseous fuels Unplasticized polyamide (PA-U) piping systems with fusion jointing and
27、mechanical jointing Part 1: General3 Terms, definitions, symbols and abbreviated termsFor the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO 16486-1 apply.4 CompoundThe pipes shall be made from virgin material. Rework material shall not be used.The comp
28、ound from which the pipes are made shall be in accordance with ISO 16486-1.5 AppearanceWhen viewed without magnification, the internal and external surfaces of pipes shall be smooth, clean and free from scoring, cavities and other surface defects which can affect pipe performance. The pipe ends shal
29、l be cut cleanly and square to the axis of the pipe.6 Geometrical characteristics6.1 Measurement of dimensionsDimensions shall be measured in accordance with ISO 3126 at (23 2) C, after being conditioned for at least 4 h. The measurement shall not be made less than 24 h after manufacture.6.2 Mean ou
30、tside diameters, out-of-roundness and their tolerancesThe mean outside diameter of the pipe, dem, and the out-of-roundness and their tolerances shall be in accordance with Table 1.For maximum mean outside diameter grade B tolerances, ISO 11922-1 shall apply.Table 1 Mean outside diameters and out-of-
31、roundnessDimensions in millimetresNominal outside diameterMean outside diameter Maximum of absolute out-of-roundnessadndem,mindem,maxGrade KbGrade N16 20 25 3216,0 20,0 25,0 32,016,3 20,3 25,3 32,31,2 1,2 1,5 2,01,2 1,2 1,2 1,340 50 63 7540,0 50,0 63,0 75,040,4 50,4 63,4 75,52,4 3,0 3,8 1,4 1,4 1,5
32、1,690 110 125 14090,0 110,0 125,0 140,090,6 110,7 125,8 140,9 1,8 2,2 2,5 2,8DIN ISO 16486-2:2015-07 7 Nominal outside diameterMean outside diameter Maximum of absolute out-of-roundnessadndem,mindem,maxGrade KbGrade N160 180 200 225160,0 180,0 200,0 225,0161,0 181,1 201,2 226,4 3,2 3,6 4,0 4,5250 25
33、0,0 251,5 5,0aMeasurement of out-of-roundness shall be made at the point of manufacture according to ISO 3126.bFor coiled pipe with dn 63 mm, grade K applies; for pipe with dn 75 mm, the maximum out-of roundness shall be specified by agreement.6.3 Wall thicknesses and tolerances6.3.1 Minimum wall th
34、icknessThe minimum wall thickness, emin, shall be in accordance with Table 2. Small diameter pipes are characterized by wall thickness. Large diameter pipes are characterized by their standard dimension ratio (SDR).The use of any SDR derived from the pipe series S given according to ISO 4065 and ISO
35、 161-1 is permitted.NOTE In order to minimize the possibility of damage to small-diameter gas pipes by external influences, the use of pipes having a wall thickness of not less than 3,0 mm, even if higher than the minimal SDR value, can be considered.Table 2 Minimum wall thicknessDimensions in milli
36、metresNominal outside diameterdnMinimum wall thicknesseminSDR 7,4 SDR 9 SDR 11 SDR 13,6 SDR 17 SDR 21 SDR 2616 20 25 322,2 2,8 3,5 4,4 2,3 2,8 3,6 2,3 2,9 2,4 40 50 63 755,5 6,9 8,6 10,34,5 5,6 7,1 8,43,7 4,6 5,8 6,83,0 3,7 4,7 5,62,4 3,0 3,8 4,52,0 2,4 3,0 3,6 2,0 2,5 2,990 110 125 14012,3 15,1 17,
37、1 19,210,1 12,3 14,0 15,78,2 10,0 11,4 12,76,7 8,1 9,2 10,35,4 6,6 7,4 8,34,3 5,3 6,0 6,73,9 4,2 4,8 5,4160 180 200 22521,9 24,6 27,4 30,817,9 20,1 22,4 25,214,6 16,4 18,2 20,511,8 13,3 14,7 16,69,5 10,7 11,9 13,47,7 8,6 9,6 10,86,2 6,9 7,7 8,6250 34,2 27,9 22,7 18,4 14,9 12,0 9,66.3.2 Tolerances on
38、 wall thickness at any pointThe tolerances on the wall thickness at any point shall be in accordance with ISO 11922-1:1997, Grade V. The maximum permissible variation between the nominal wall thickness, en, and the wall thickness at any point, e, shall be in accordance with Table 3.Table 1 (continue
39、d)DIN ISO 16486-2:2015-07 8 Table 3 Tolerances on wall thickness at any pointDimensions in millimetresMinimum wall thicknesseminPermitted positive deviationMinimum wall thicknesseminPermitted positive deviation 2,0 3,0 4,0 5,03,0 4,0 5,0 6,00,4 0,5 0,6 0,718,0 19,0 20,0 21,019,0 20,0 21,0 22,02,0 2,
40、1 2,2 2,36,0 7,0 8,0 9,07,0 8,0 9,0 10,00,8 0,9 1,0 1,122,0 23,0 24,0 25,023,0 24,0 25,0 26,02,4 2,5 2,6 2,710,0 11,0 12,0 13,011,0 12,0 13,0 14,01,2 1,3 1,4 1,526,0 27,0 28,0 29,027,0 28,0 29,0 30,02,8 2,9 3,0 3,114,0 15,0 16,0 17,015,0 16,0 17,0 18,01,6 1,7 1,8 1,930,0 31,0 32,0 33,031,0 32,0 33,0
41、 34,03,2 3,3 3,4 3,534,0 35,035,0 36,03,6 3,77 Mechanical characteristics7.1 ConditioningUnless otherwise specified by the applicable test method, the test pieces shall be conditioned for at least 16 h at 23 C and 50 % relative humidity in accordance with ISO 291 before testing in accordance with Ta
42、ble 4.7.2 RequirementsThe test pieces shall be tested in accordance with Table 4. When tested using the test method and parameters specified therein, the pipe shall have mechanical characteristics conforming to the requirements of Table 4.Table 4 Mechanical characteristicsCharacteristic RequirementT
43、est parametersTest method(s)Parameter ValueHydrostatic strength at 20 C for 1 000 hNo failure of any test piece during test periodEnd caps Type a)ISO 1167-1ISO 1167-2Orientation FreeConditioning period 6 hType of test Water-in-waterTest temperature 20 CTest period 1 000 hCircumferential (hoop) stres
44、s: PA-U 11 160 and PA-U 12 160a19,0 MPaPA-U 11 180 and PA-U 12 180a20,0 MPaDIN ISO 16486-2:2015-07 9 Characteristic RequirementTest parametersTest method(s)Parameter ValueHydrostatic strength at 80 C for 165 hNo failure of any test piece during test periodEnd caps Type a)ISO 1167-1ISO 1167-2Orientat
45、ion FreeConditioning period 6 hType of test Water-in-waterTest temperature 80 CTest period 165 hCircumferential (hoop) stress: PA-U 11 160 and PA-U 12 160a10,0 MPaPA-U 11 180 and PA-U 12 180a11,5 MPaElongation at break 200 % Test speed 25 mm/minISO 6259-1 ISO 6259-3Melt volume rate (MVR) b5 mm (notc
46、h test)No failure during the test periodTest temperature 80 CISO 13479SDR 11Type of test Water-in-waterTest period 500 hTest pressure: PA-U 11 160 and PA-U 12 160a18 barcPA-U 11 180 and PA-U 12 180a20 barcResistance to rapid crack propagation (critical pressure, pc,S4) (S4 test)pc,S4 0,9pc,S4,REFdeT
47、est temperature 0 C ISO 13477a For material classification and designation, see ISO 16486-1, 5.4.b It is essential that the water content of the sample be 50 mm, a bead size of 3 mm to 5 mm should be present before removing the heater.“ 14 joint integrity. The fusion force should be held between the
48、 pipe ends until the surface of the bead is cool to the touch. Pulling, installation or rough handling of the pipe should be avoided until the joint cools to ambient temperature (roughly an additional 30 min).DIN ISO 16486-2:2015-07 A.3.8 Hold under pressure until coolingHold the molten joint immobi
49、le under pressure until cooled adequately to develop strength. Allowing proper times under pressure for cooling prior to removal from the clamps of the machine is important in achieving 15 Bibliography1 ISO 161-1, Thermoplastics pipes for the conveyance of fluids Nominal outside diameters and nominal pressures Part 1: Metric series2 ISO 4065, Thermoplastics pipes Universal wall thickness table3 ISO 17467 (all parts), Plast
