1、BSI Standards PublicationBS ISO 16422:2014Pipes and joints made oforiented unplasticizedpoly(vinyl chloride) (PVC-O) forthe conveyance of water underpressure SpecificationsBS ISO 16422:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16422:2014. Itsupersede
2、s BS ISO 16422:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/88/2, Plastics piping for pressure applications.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to
3、 include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 69377 9ICS 23.040.20; 23.040.45; 91.140.60Compliance with a British Standard cannot confer immunity froml
4、egal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text affectedBS ISO 16422:2014 ISO 2014Pipes and joints made of oriented unplasticized poly(vinyl chloride) (PVC-O) for t
5、he conveyance of water under pressure SpecificationsTubes et assemblages en poly(chlorure de vinyle) non plastifi orient (PVC-O) pour le transport de leau sous pression SpcificationsINTERNATIONAL STANDARDISO16422Second edition2014-02-15Reference numberISO 16422:2014(E)BS ISO 16422:2014ISO 16422:2014
6、(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of 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
7、intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPubli
8、shed in SwitzerlandBS ISO 16422:2014ISO 16422:2014(E) ISO 2014 All rights reserved iiiContents PageForeword vIntroduction vi1 Scope . 12 Normative references 13 Terms and definitions . 24 Symbols and abbreviated terms . 54.1 Symbols . 54.2 Abbreviations . 65 Material 65.1 General . 65.2 Rework mater
9、ial 66 Effect of materials on water quality . 67 Material classification . 67.1 MRS value 67.2 Design coefficient 67.3 Design stress . 78 Classification and selection of pipes 78.1 Classification . 78.2 Calculation of wall thickness . 88.3 Determination of the allowable operating pressure, PFA, for
10、temperatures up to 45 C . 88.4 Derating factor related to application of the system 89 General requirements for pipes 109.1 Appearance . 109.2 Opacity 1010 Geometrical characteristics for pipes .1010.1 Measurement . 1010.2 Outside diameters and wall thicknesses . 1010.3 Pipes with integral sockets 1
11、010.4 Plain ends . 1111 Mechanical characteristics of pipes .1111.1 Resistance to hydrostatic pressure . 1111.2 Resistance to external blows at 0 C 1211.3 Ring stiffness 1212 Physical characteristics 1213 Mechanical characteristics of assemblies, including joints 1313.1 Assemblies with non-end-load-
12、bearing joints .1313.2 Short-term pressure test for leak tightness of assemblies .1313.3 Short-term negative pressure test for leak tightness of assemblies 1513.4 Long-term pressure test for leak tightness . 1513.5 End-load-bearing joints Pressure and bending test for leak tightness and strength 161
13、4 Elastomeric seals .1615 Marking .16Annex A (normative) Establishment of the pipe material classification .17Annex B (informative) Minimum depth of engagement of sockets 18Annex C (normative) Temperature derating factor .21Annex D (informative) Ring stiffness of pipes .22BS ISO 16422:2014ISO 16422:
14、2014(E)iv ISO 2014 All rights reservedAnnex E (informative) Determination of the long-term test pressure by creep consideration .24Annex F (informative) Determination of axial and tangential orientation factor 25BS ISO 16422:2014ISO 16422:2014(E)ForewordISO (the International Organization for Standa
15、rdization) is a worldwide federation of national standards bodies (ISO member bodies). The work of 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 t
16、o 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 of electrotechnical standardization.The procedures use
17、d to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules o
18、f the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identifie
19、d during the development of 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 information given for the convenience of users and does not constitute an endorsement.For an explanation on t
20、he meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/
21、TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies.This second edition cancels and replaces the first edition (ISO 16422:2006), of which it constitutes a minor revision with the following changes: Table 4: Physic
22、al characteristics: Resistance to dichloromethane and alternative tests. Annex A: Determination of pipe material classification: Procedures for classified and non-classified feedstock material. Annex F: Determination of axial and tangential orientation factor. ISO 2014 All rights reserved vBS ISO 16
23、422:2014ISO 16422:2014(E)IntroductionMolecular orientation of thermoplastics results in improvement of physical and mechanical properties. Orientation is carried out at temperatures well above the glass transition temperature.Orientation of PVC-U pipe-material can be induced by different processes.I
24、n general the following production process is common. A thick-wall tube is extruded (feedstock) and conditioned at the desired temperature. The orientation process is activated in circumferential and axial directions under controlled conditions.After the orientation process, the pipe is cooled down
25、quickly to ambient temperature.The orientation of the molecules creates a laminar structure in the material of the pipe wall. This structure gives the ability to withstand brittle failure emanating from minor flaws in the material matrix or from scratches at the surface of the pipe wall. PVC-O can t
26、herefore be considered as highly resistant to notches and no testing is needed. Because of the morphology of oriented PVC-U pipe-material, there is no risk of long-line rapid crack propagation.Improved hoop strength, allows reduced wall thickness with material and energy savings. Improved resistance
27、 to impact and fatigue also result.The classification depends on material compound/formulation and stretch ratios used. Therefore, with the classification, these characteristics may be specified or determined.Variations in stretch ratios should be within 10 % of the value determined on the pipes use
28、d for classification. The determination of the stretch ratios may be carried out as shown in Annex F.vi ISO 2014 All rights reservedBS ISO 16422:2014Pipes and joints made of oriented unplasticized poly(vinyl chloride) (PVC-O) for the conveyance of water under pressure Specifications1 ScopeThis Inter
29、national Standard specifies the requirements of pipes and joints made of oriented unplasticized poly(vinyl chloride) (PVC-O), for piping systems intended to be used underground or above-ground where not exposed to direct sunlight, for water mains and services, pressurized sewer systems and irrigatio
30、n systems.The piping system according to this International Standard is intended for the conveyance of cold water under pressure, for drinking water and for general purposes up to and including 45 C, and especially in those applications where special performance requirements are needed, such as impa
31、ct loads and pressure fluctuations, up to pressure of 25 bars1).Joints constructed of other materials should meet their own relevant standards in addition to the fitness-for-purpose requirements of this International Standard.2 Normative referencesThe following documents, in whole or in part, are no
32、rmatively referenced in this document and are indispensable for 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 3:1973, Preferred numbers Series of preferred numbersISO
33、 161-1, Thermoplastics pipes for the conveyance of fluids Nominal outside diameters and nominal pressures Part 1: Metric seriesISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 1: General methodISO 1167-2,
34、 Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal pressure Part 2: Preparation of pipe test piecesISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids Determination of the resistance to internal p
35、ressure Part 4: Preparation of assembliesISO 1452-2:2009, Plastics piping systems for water supply and for buried and above-ground drainage and sewerage under pressure Unplasticized poly(vinyl chloride) (PVC-U) Part 2: PipesISO 1452-5:2009, Plastics piping systems for water supply and for buried and
36、 above-ground drainage and sewerage under pressure Unplasticized poly(vinyl chloride) (PVC-U) Part 5: Fitness for purpose of the systemISO 1628-2, Plastics Determination of the viscosity of polymers in dilute solution using capillary viscometers Part 2: Poly(vinyl chloride) resinsISO 2505, Thermopla
37、stics pipes Longitudinal reversion Test method and parametersISO 2507-1, Thermoplastics pipes and fittings Vicat softening temperature Part 1: General test method1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2INTERNATIONAL STANDARD ISO 16422:2014(E) ISO 2014 All rights reserved 1BS ISO 16422:2014ISO 16
38、422:2014(E)ISO 2507-2, Thermoplastics pipes and fittings Vicat softening temperature Part 2: Test conditions for unplasticized poly(vinyl chloride) (PVC-U) or chlorinated poly(vinyl chloride) (PVC-C) pipes and fittings and for high impact resistance poly (vinyl chloride) (PVC-HI) pipesISO 2531, Duct
39、ile iron pipes, fittings, accessories and their joints for water applicationsISO 3126, Plastics piping systems Plastics components Determination of dimensionsISO 3127, Thermoplastics pipes Determination of resistance to external blows Round-the-clock methodISO 4065, Thermoplastics pipes Universal wa
40、ll thickness tableISO 4633, Rubber seals Joint rings for water supply, drainage and sewerage pipelines Specification for materialsISO 6259-2, Thermoplastics pipes Determination of tensile properties Part 2: Pipes made of unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly (vinyl chloride) (
41、PVC-C) and high-impact poly (vinyl chloride) (PVC-HI)ISO 7686, Plastics pipes and fittings Determination of opacityISO 9080, Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolationISO 9852, Unplasticized poly(v
42、inyl chloride) (PVC-U) pipes Dichloromethane resistance at specified temperature (DCMT) Test methodISO 9969, Thermoplastics pipes Determination of ring stiffnessISO 11922-1:1997, Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 1: Metric seriesISO 12162, Thermoplastic
43、s materials for pipes and fittings for pressure applications Classification, designation and design coefficientISO 13783, Plastics piping systems Unplasticized poly(vinyl chloride) (PVC-U) end-load-bearing double-socket joints Test method for leaktightness and strength while subjected to bending and
44、 internal pressureISO 13844, Plastics piping systems Elastomeric-sealing-ring-type socket joints for use with plastic pipes Test method for leaktightness under negative pressure, angular deflection and deformationISO 13845, Plastics piping systems Elastomeric-sealing-ring-type socket joints for use
45、with thermoplastic pipes Test method for leaktightness under internal pressure and with angular deflectionISO 13846, Plastics piping systems End-load-bearing and non-end-load-bearing assemblies and joints for thermoplastics pressure piping Test method for long-term leaktightness under internal water
46、 pressureISO 18373-1, Rigid PVC pipes Differential scanning calorimetry (DSC) method Part 1: Measurement of the processing temperature3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1nominal outside diameterdnnumerical designation of size which i
47、s common to all components in a thermoplastics piping system other than flanges and components designated by thread sizeNote 1 to entry: It is a convenient round number for reference purposes.2 ISO 2014 All rights reservedBS ISO 16422:2014ISO 16422:2014(E)Note 2 to entry: For pipe conforming to ISO
48、161-1, the nominal outside diameter, expressed in millimetres, is the minimum mean outside diameter dem, min.3.2nominal wall thicknessenspecified wall thickness, in millimetresNote 1 to entry: It is identical to the specified minimum wall thickness at any point ey, min.3.3nominal pressurePNalphanume
49、ric designation related to the mechanical characteristics of the components of a piping system and used for reference purposes3.4hydrostatic pressurepinternal pressure applied to a piping system3.5working pressuremaximum pressure which a piping system can sustain in continuous use under given service conditions without pressure surgeNote 1 to entry: For thermoplastics piping systems, the value of the nominal pressure is equal to the working pressu
