1、September 2009 Translation by DIN-Sprachendienst.English price group 9No 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).I
2、CS 23.040.20!$W8“1615221www.din.deDDIN 16833Pipes of raised-temperature-resistance polyethy ene (PE-RT) PE-RT Type I and PE-RT Type II General quality requirements, testingEnglish translation of DIN 16833:2009-09Rohre aus Polyethylen erhhter Temperaturbestndigkeit (PE-RT) PE-RT Typ I und PE-RT Typ I
3、I Allgemeine Gteanforderungen, PrfungenEnglische bersetzung von DIN 16833:2009-09Tubes en polythylne meilleur rsistance la temprature (PE-RT) PE-RT Type I et PE-RT Type II Exigences g n rales en mati re de qualit, essaisTraduction anglaise de DIN 16833:2009-09SupersedesDIN 16833:2007-05www.beuth.deD
4、ocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.13 06.10la DIN 16833:2009-09 A comma is used as the decimal marker. Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Material (moulding material).5 4.1 Gener
5、al5 4.2 Demonstrating long-term hydrostatic strength5 5 Requirements.7 5.1 Form supplied 7 5.2 Surface quality .8 5.3 Dimensions and tolerances 8 5.4 Strength characteristics determined by long-term hydrostatic strength testing .8 5.5 Demonstrating thermal stability by means of long-term hydrostatic
6、 strength testing8 5.6 Heat reversion8 6 Testing 9 6.1 Surface quality .9 6.2 Dimensions.9 6.3 Out-of-roundness.9 6.4 Strength characteristics determined by long-term hydrostatic strength testing .9 6.5 Heat reversion10 6.6 Inspection documents.10 Annex A (informative) Explanatory notes.11 Bibliogra
7、phy 13 Figures Figure 1 Reference lines for long-term hydrostatic strength (time-to-failure curves) for pipes of polyethylene of raised temperature resistance PE-RT type I 6 Figure 2 Reference lines for long-term hydrostatic strength (time-to-failure curves) for pipes of polyethylene of raised tempe
8、rature resistance PE-RT type II . 7 Figure 3 Test piece for long-term hydrostatic strength test. 9 Tables Table 1 Test conditions for long-term hydrostatic strength testing 8 Table 2 Thermal stability demonstrated by means of long-term hydrostatic strength testing 8 Table 3 Test conditions for heat
9、reversion test . 10Table A.1 PE-RT properties (guideline values) 122 DIN 16833:2009-09 Foreword This document has been prepared by Working Committee NA 054-05-02 AA Prfverfahren fr Rohre of the Normenausschuss Kunststoffe (FNK) (Plastics Standards Committee). Attention is drawn to the possibility th
10、at some elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. Amendments This standard differs from DIN 16833:2007-05 as follows: a) The long-term hydrostatic strength reference lines for PE-RT type I have been
11、 harmonized with ISO/FDIS 24033. b) Reference lines as in ISO/FDIS 24033 have been specified. c) General material specifications (4.1) have been revised. d) Thermal stability specifications (5.5) have been revised. e) The designation of moulding materials has been modified (Annex A). Previous editio
12、ns DIN 16833: 2001-06, 2007-05 3 DIN 16833:2009-09 1 Scope This standard applies to straight, circular, seamless pipes of polyethylene of raised temperature resistance, PE-RT type I and PE-RT type II, having dimensions as in DIN 16834. Attention is brought to the fact that there are European product
13、 standards which apply to specific applications; these are to be complied with where relevant. Some of these product standards are listed in the bibliography for the information of users of this standard. Please note that because European Standards are continually being developed, this list is not e
14、xhaustive. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 323-1, Pref
15、erred numbers and series of preferred numbers Part 1: Basic values, calculated values, rounded values DIN 16834, Pipes of raised-temperature-resistance polyethylene (PE-RT) PE-RT Type I and PE-RT Type II Dimensions DIN EN 10204, Metallic products Types of inspection document DIN EN ISO 9080:2003-10,
16、 Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation DIN EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1
17、: General method DIN EN 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 DIN EN ISO 2505, Thermoplastics pipes Longitudinal reversion Test methods and parameters 3 Terms
18、 and definitions For the purposes of this document, the terms and definitions as in DIN 16834 and the following apply. 3.1 long-term hydrostatic strength strength of a pipe subjected to internal pressure p NOTE Calculated as in equation (1). eedp2=MPa (1) where p is the internal pressure, in MPa1);
19、d is the outside diameter of the pipe, in mm; e is the wall thickness of the pipe, in mm. 1) 1 MPa = 10 bar 4 DIN 16833:2009-09 3.2 out-of-roundness ovality difference between the measured maximum outside diameter and the measured minimum outside diameter in the same cross-section of the pipe 4 Mate
20、rial (moulding material) 4.1 General Pipes shall be made of polyethylene of raised temperature resistance PE-RT type I or PE-RT type II. The choice of stabilizers and other additives (e.g. pigments, lubricants) shall be left to the pipe manufacturer. The standard does not apply to the use of recycle
21、d materials or reinforced moulding materials (e.g. with chalk or glass fibres). The use of own reprocessable material is permitted. Moulding materials and additives of unknown identity and composition shall not be used. PE-RT type II differs from PE-RT type I in that it has considerably different lo
22、ng-term behaviour: Its long-term strength is higher at 70 C over 50 years, thus allowing higher S- or SDR values in pipe dimensioning. 4.2 Demonstrating long-term hydrostatic strength It shall be demonstrated that values for the long-term hydrostatic strength of the material used lie on or above the
23、 reference line (time-to-failure curve) shown in Figure 1 or Figure 2. Reference lines shall be established as in DIN EN ISO 9080. The dashed lines apply for longer exposure times at 110 C. Extrapolation values and limits are based on the extrapolation factors given in Table 1 of DIN EN ISO 9080:200
24、3-10. The reference lines for PE-RT type I in Figure 1 are based on equations (2) and (3). They apply for temperatures of 10 C to 95 C. The lines for 110 C are not based on these equations. Flat branch: lg t = 190,481 + 78 763,07/T + 119,877 lg 58 219,035/T lg (2) Steep branch: lg t = 23,795 42 + 11
25、 150,56/T 1 723,318/T lg (3) The reference lines for PE-RT type II are based on equation (4). They apply for temperatures of 10 C to 110 C. lg t = 219 + 90 635,353/T + 126,387 lg 62 600,752/T lg (4) where t is the time, in h; T is the temperature, in K; is the long-term hydrostatic strength, in MPa.
26、 In the case of PE-RT type II pipes, when drawing up long-term hydrostatic strength curves using the standard extrapolation method (SEM) there shall be no type B failure (brittle failure) at a test temperature of 110 C before 8 760 hours have been reached. 5 DIN 16833:2009-09 Figure 1 Reference line
27、s for long-term hydrostatic strength (time-to-failure curves) for pipes of polyethylene of raised temperature resistance PE-RT type I 6 DIN 16833:2009-09 Figure 2 Reference lines for long-term hydrostatic strength (time-to-failure curves) for pipes of polyethylene of raised temperature resistance PE
28、-RT type II 5 Requirements 5.1 Form supplied Pipe ends should be cut as square as possible to the pipe axis. Pipes shall be free from any blisters, blowholes and any other inhomogeneities which could impair their performance. Pigmentation shall be uniform throughout. 7 DIN 16833:2009-09 5.2 Surface
29、quality Pipe surfaces shall be smooth both inside and out. Shallow grooves and the resulting minor irregularities in wall thickness are permitted, as long as the actual wall thickness does not go below the nominal value. Sharp edged grooves and cavities are not permitted in any case. Testing shall b
30、e as in 6.1. 5.3 Dimensions and tolerances The pipe outside diameter, wall thickness and out-of-roundness, and the relevant tolerances shall be as in DIN 16834. Testing shall be as in 6.2. For pipes with special dimensions which are not covered by DIN Standards because they deviate from preferred nu
31、mber series (as in DIN 323-1) and international specifications, calculations shall be made on the basis of DIN 16834. 5.4 Strength characteristics determined by long-term hydrostatic strength testing When tested in accordance with 6.4 pipes shall meet the strength requirements of Table 1. During the
32、 prescribed period of stressing they shall not show signs of leakage or fail. Table 1 Test conditions for long-term hydrostatic strength testing Test temperature Proof stress 0 MPa Test time (min. failure time) t C Exposure medium Type I Type II h 95 Air or water 3,6 3,7 165 95 Air or water 3,4 3,6
33、1 000 5.5 Demonstrating thermal stability by means of long-term hydrostatic strength testing When tested in accordance with 6.4 pipes shall meet the strength requirements of Table 2. During the prescribed period of stressing they shall not fail or show signs of leakage. Table 2 Thermal stability dem
34、onstrated by means of long-term hydrostatic strength testing Test temperature Proof stress 0 MPa Test time (min. failure time) t C Exposure medium Type I Type II h 110 Air 1,9 2,3 8 760 5.6 Heat reversion When testing in accordance with 6.5 the mean relative change in pipe length shall not be greate
35、r than 3 %. 8 DIN 16833:2009-09 6 Testing 6.1 Surface quality The inside and outside surfaces of the pipe shall be inspected with backlight, without using optical aids. 6.2 Dimensions The mean pipe outside diameter shall be determined to an accuracy of 0,1 mm by circumferential measurement at both p
36、ipe ends, at a point at least 0,5 d from the cut edge. The wall thickness shall be determined to an accuracy of 0,1 mm at both ends, at at least four points spaced evenly around the circumference of the pipe. Measurements shall be taken within the cylindrical area 0,5 d. Measurements shall be taken
37、at ambient temperature or, in cases of dispute, at (23 2) C. 6.3 Out-of-roundness Immediately after production, out-of-roundness shall be determined by taking the difference between the minimum and maximum outside diameters measured at the same cross-section, to an accuracy of 0,1 mm. 6.4 Strength c
38、haracteristics determined by long-term hydrostatic strength testing General information on testing is given in DIN EN ISO 1167-1 and DIN EN ISO 1167-2. For each proof stress value as in Table 1 take three sections of pipe (referred to below as “pipes”) as test pieces having a length l1(see Figure 3)
39、: for d 250 mm: l1 3 d + 2 l5+ 250 mm for d 250 mm: l1 1 000 mm + 2 l5Figure 3 Test piece for long-term hydrostatic strength test where d is the pipe outside diameter, in mm; l1is the test piece length, in mm; l2is the test length, in mm; l3is the length of pipe affected by clamping of end caps, in
40、mm; for d 250 mm: l3= d; for d 250 mm: l3= 250 mm; l4is the assessment length, in mm; l4= l2 2 l3; l5is the free length, in mm (for end caps). Along the assessment length l4of the pipe, determine the wall thickness e at eight points and the outside diameter d at three points, in both cases by circum
41、ferential measurement and to an accuracy of 0,1 mm; also determine the minimum wall thickness eminand the mean outside diameter d . 9 DIN 16833:2009-09 Fit end caps to both ends of the pipe, ensuring free axial movement during testing. Through an opening in one of the end caps, fill the pipe with wa
42、ter at the test temperature specified in Table 1 (to within 5 K), then place the pipe in a bath which has been heated to the test temperature (maintained to within 1 K) and leave it there for at least 1 h. If the pipe is filled with cooler water, leave it in the bath for 12 h until temperature equal
43、ization is achieved. With the pipe still in the bath, steadily increase the pressure for 1 min until the specified test pressure is reached. Maintain the proof test to within 2,5 % throughout the test time (minimum time-to-failure) specified in Table 1. Calculate the test pressure p using equation (
44、5): min0min2edep= (5) where d is the mean outside diameter over l4, in mm; eminis the minimum wall thickness over l4, in mm; 0is the proof stress as in Table 1, in MPa2). Determine whether the pipe has failed or developed signs of leakage during the specified test time. If the pipe has failed within
45、 length l3(clamping zone) during this period, disregard the test results and repeat the test. 6.5 Heat reversion Heat reversion shall be determined as in DIN EN ISO 2505. Table 3 Test conditions for heat reversion test Wall thickness e Test temperature Test period t mm C min 8 110 2 60 1 8 1012 Pipe
46、s conforming to this standard comply with the requirements for building material class B 2 (normally flammable) as in DIN 4102-4. aPreparation of test specimens as in DIN EN ISO 1872-212 DIN 16833:2009-09 13 Bibliography DIN 4102-4, Fire behaviour of building materials and elements Overview and desi
47、gn of classified building materials, elements and components DIN 16887, Determination of the long-term hydrostatic pressure resistance of thermoplastics pipes DIN 53752, Testing of plastics Determination of the coefficient of linear thermal expansion DIN EN 12664, Thermal performance of building mat
48、erials and products Determination of thermal resistance by means of guarded hot plate and heat flow meter methods Dry and moist products with medium and low thermal resistance DIN EN ISO 178, Plastics Determination of flexural properties DIN EN ISO 1872-1, Plastics Polyethylene (PE) moulding and extrusion materials Part 1: Designation system and basis for specifications DIN EN ISO 1872-2, Plastics Po
