1、June 2015 Translation by DIN-Sprachendienst.English price group 7No 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 23
2、.040.45; 23.060.01; 23.040.20!%CRJ“2324739www.din.deDDIN EN ISO 17778Plastics piping systems Fittings, valves and ancillaries Determination of gaseous flow rate/pressure drop relationships(ISO 17778:2015);English version EN ISO 17778:2015,English translation of DIN EN ISO 17778:2015-06Kunststoff-Roh
3、rleitungssysteme Formstcke, Armaturen und Zubehrteile Bestimmung des Zusammenhanges zwischen Gasdurchfluss und Druckabfall(ISO 17778:2015);Englische Fassung EN ISO 17778:2015,Englische bersetzung von DIN EN ISO 17778:2015-06Systmes de canalisations en plastiques Raccords, robinets et quipements auxi
4、liaires Dtermination du rapport dbit gazeux/perte de charge (ISO 17778:2015);Version anglaise EN ISO 17778:2015,Traduction anglaise de DIN EN ISO 17778:2015-06SupersedesDIN EN 12117:1997-11www.beuth.deDocument comprises 10 pagesIn case of doubt, the German-language original shall be considered autho
5、ritative.05.15 DIN EN ISO 17778:2015-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 17778:2015) has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and values for the transport of fluids” in collaboration with Technical Committee CEN/TC
6、155 “Plastics piping systems and ducting systems” (Secretariat: NEN, Netherlands). The responsible German body involved in its preparation was the DIN-Normenausschuss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-05-02 AA Prfverfahren fr Rohre. The European Standard referr
7、ed to in this document has been published as DIN EN Standard with the same number. Amendments This standard differs from DIN EN 12117:1997-11 as follows: a) a table of contents has been added; b) the standard has been editorially revised; c) the scope is no longer restricted to components intended t
8、o be used in polyethylene (PE) piping systems. Previous editions DIN EN 12117:199711 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17778 March 2015 ICS 23.040.20; 23.040.45; 23.060.01 Supersedes EN 12117:1997English Version Plastics piping systems - Fittings, valves and ancillaries - Dete
9、rmination of gaseous flow rate/pressure drop relationships (ISO 17778:2015) Systmes de canalisations en plastiques - Raccords, robinets et quipements auxiliaires - Dtermination du rapport dbit gazeux/perte de charge (ISO 17778:2015) Kunststoff-Rohrleitungssysteme - Formstcke, Armaturen und Zubehrtei
10、le - Bestimmung des Zusammenhanges zwischen Gasdurchfluss und Druckabfall (ISO 17778:2015)This European Standard was approved by CEN on 14 November 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
11、tus 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G
12、erman). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
13、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and U
14、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No.
15、EN ISO 17778:2015 EForeword 31 Scope . 42 Normative references 43 Principle 44 Apparatus . 45 Test pieces preparation . 66 Procedure. 67 Calculation of results . 78 Test report . 7Contents PageDIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 2 Foreword This document (EN ISO 17778:2015) has been prepar
16、ed by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“ in collaboration with Technical Committee CEN/TC 155 “Plastics piping systems and ducting systems” the secretariat of which is held by NEN. This European Standard shall be given the status of a nat
17、ional standard, either by publication of an identical text or by endorsement, at the latest by September 2015, and conflicting national standards shall be withdrawn at the latest by September 2015. Attention is drawn to the possibility that some of the elements of this document may be the subject of
18、 patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12117:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europ
19、ean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slov
20、enia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 17778:2015 has been approved by CEN as EN ISO 17778:2015 without any modification. DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 3 WARNING Persons using this International Standard should be familiar
21、 with normal laboratory practice, if applicable. The use of this International Standard can involve hazardous materials, operations, and equipment. This International Standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the use
22、r of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1 ScopeThis International Standard specifies a method for determining the flow rate/pressure drop relationship of components for plastics pipin
23、g systems when tested using air at 25 mbar.NOTE 1 bar = 105N/m2.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the
24、 latest edition of the referenced document (including any amendments) applies.EN 837-1, Pressure gauges Part 1: Bourdon tube pressure gauges Dimensions, metrology, requirements and testing3 PrincipleUtilizing a constant main pressure, the flow rate through a piping component is varied between specif
25、ic limits to assess the pressure drop. The average value of the air flow rate for a pressure drop appropriate to the size of the component is then determined. The value for other gases can be calculated on the basis of density differences.NOTE It is assumed that the following test parameters are set
26、 by the standard making reference to this International Standard:a) the relevant value(s) for pressure drop, pn(see 7.2);b) the relevant value to be used for airand the relevant temperature and pressure if not as given in 7.3;c) the relevant value to be used for gasand the relevant temperature and p
27、ressure if not as given in 7.3.4 Apparatus4.1 Schematic test arrangement for determination of flow rate/pressure drop relationship is shown in Figure 1.4.2 A source of air.DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 4 4.3 Pressure controller (A), capable of maintaining an output pressure of (25 0
28、,5) mbar.4.4 Flow meter (B), accurate to 2 % and of the positive displacement or turbine type.4.5 Manometer (C), for measuring the gas pressure in the main line and capable of checking conformity to 4.2, 6.4, and 6.7 (class 0,6 or better as specified in EN 837-1).4.6 Manometer (G), for measuring dif
29、ferential pressure p, conforming to class 0,25 of EN 837-1.4.7 Outlet valve (E).KeyA pressure controller E outlet valveB flow meter F reservoirC pressure manometer G differential pressure manometerD component under testFigure 1 Schematic test arrangement for determination of flow rate/pressure drop
30、relationshipNOTE The differential pressure p is the pressure difference between that at point P1and that at point P2.DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 5 5 Test pieces preparationThe test piece shall comprise the component to be tested fused or connected between two pieces of plastic pip
31、e that fits the component and provided with connectors appropriate to the pressure drop apparatus.The free lengths of the plastic pipe and the geometry of the test arrangement shall conform to Figure 1.For tapping tees, the arrangement shall be such that the pressure drop can be measured through the
32、 outlet branch.Pressure tang points upstream and downstream of the component under test shall be flush with the pipe bore and free from burrs.6 Procedure6.1 Carry out the following procedure at an ambient temperature of (23 2) C.6.2 Partially open the outlet valve (E).6.3 Open the inlet valve to the
33、 pressure controller (A) so that air starts to flow and ensure that the air flows from the outlet valve only.6.4 By means of the pressure controller (A), regulate the air pressure in the main line at point P1as shown by manometer (C), to (25 0,5) mbar.6.5 Measure and record the flow rate, Q, on flow
34、 meter (B) (see 6.9) and the pressure drop, p, on manometer (G) (see Figure 1).6.6 Open the outlet valve (E) such that the air pressure at point P1in the main line is reduced at manometer (C) by approximately 5 mbar.6.7 Increase the flow rate until the air pressure in the main line at manometer (C)
35、returns to (25 0,5) mbar.6.8 Measure and record the flow rate, Q, and the pressure drop, p.6.9 Repeat operations 6.6, 6.7, and 6.8 until the outlet valve (E) is fully open. For tapping tees, the pressure drop shall be measured through the outlet branch.6.10 Consider the data acceptable if the follow
36、ing conditions are fulfilled:a) at least five sets of data for Q and p, and hence differing values for V (see 7.1) have been obtained;b) at least one value of V is 2,5m/s;c) at least one value of V is 7,5m/s.Otherwise, adjust the inlet valve opening and repeat 6.4 and 6.5, as necessary, to obtain th
37、e missing value(s).If it is not possible for V to be 7,5m/s using a pressure of (25 0,5) mbar, stop the test and report this observation.DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 6 7 Calculation of results7.1 Using each set of pressure drop values and the corresponding flow rates, obtained in a
38、ccordance with 6.5, 6.8, and 6.9, calculate the following:a) The velocity, V, of the flow, in metres per second (m/s), through the outlet pipe component of the test piece (see Clause 5) using Formula (1):VQA= (1)whereQ is the air flow rate, in cubic metres per hour (m3/h);A is the bore area of the o
39、utlet pipe, in square metres (m2).b) The factor, F, for each set of readings, based on Formula (2):FpQ=2(2)wherep is the measured pressure drop, in millibars (mbar);Q is the air flow rate, in cubic metres per hour (m3/h).Calculate the average value of F.7.2 Using the average value of F and the speci
40、fied pressure drop, pn, calculate the average air flow rate, Qa, at that pressure drop.7.3 Calculate the equivalent flow rate(s) for any other gas Qgas(e.g. natural gas), in cubic metres per hour, using Formula (3):QQgasaairgas=(3)whereQais the average air flow rate at the relevant pressure drop(s)
41、cubic metres per hour (m3/h);airis the density of air at 23 C and 1 bar, unless otherwise specified by the referring standard (kg/m3);gasis the density of the other gas at 23 C and 1 bar, unless otherwise specified by the referring standard (kg/m3).i.e. Qgas= (f)Q.8 Test reportThe test report shall
42、include the following information:a) a reference to this International Standard (i.e. ISO 17778) and the referring standard;b) all details necessary for identification of the test pieces, including the nominal size of the pipes and fittings used to produce the test pieces, the type of material, and
43、the manufacturers code;DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 7 c) the pressure drop, flow rate, and corresponding velocity for each set of data (see 7.1) measured;d) the average value of F, i.e. the relationship between pressure drop and flow rate (see 7.1);e) the calculated flow rate(s) at
44、 the specified pressure drop(s) for air (see 7.2) and for the other gas (see 7.3);f) factors that could have affected the results such as deviations from temperature limits, incidents, or operating details not specified in this International Standard;g) the date of the test.DIN EN ISO 17778:2015-06 EN ISO 17778:2015 (E) 8
