1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Determination of dimensions The European Standard EN ISO 3126:2005 has the status of a British Stan
2、dardICS 23.040.20; 23.040.45Plastics piping systems Plastics components BRITISH STANDARDBS EN ISO 3126:2005BS EN ISO 3126:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006ISBN 0 580 48964 7Cross-referencesThe British S
3、tandards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.T
4、his publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside fro
5、nt cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 19 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizatio
6、ns represented on this subcommittee can be obtained on request to its secretary. present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promu
7、lgate them in the UK.National forewordThis British Standard is the official English language version of EN ISO 3126:2005. It is identical with ISO 3126:2005. It supersedes BS 2782-11 Method 1101A:1981 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee PRI
8、/88, Plastic piping systems, to Subcommittee PRI/88/4, Method of tests for plastic piping systems and components, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3126 March 2005 ICS 23.040.20; 23.040.45 English version Pl
9、astics piping systems - Plastics components - Determination of dimensions (ISO 3126:2005) Systmes de canalisations plastiques - Composants en plastiques - Dtermination des dimensions (ISO 3126:2005) Kunststoff-Rorhleitungssysteme - Rohrleitungsteile aus Kunststoffen - Bestimmung der Mae (ISO 3126:20
10、05) This European Standard was approved by CEN on 21 February 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographica
11、l 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 responsibility of a CEN me
12、mber into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
13、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN A
14、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3126:2005: EForeword This document (EN ISO 3126:2005) has been prepared by Technical Committee CEN /TC 155, “Plastics piping systems and ducting systems“, the secretariat of which is h
15、eld by NEN in collaboration with Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2005, a
16、nd conflicting national standards shall be withdrawn at the latest by September 2005. This document is one of a series of standards on test methods, which support system standards for plastics piping systems and ducting systems. According to the CEN/CENELEC Internal Regulations, the national standar
17、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slov
18、akia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 3126:2005Reference numberISO 3126:2005(E)INTERNATIONAL STANDARD ISO3126Second edition2005-03-01Plastics piping systems Plastics components Determination of dimensions Systmes de canalisations en plastiques Composants en plastiques
19、 Dtermination des dimensions EN ISO 3126:2005ii iiiForeword ISO (the International Organization for Standardization) 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. Eac
20、h member body interested in a subject for which a technical committee has been established has the right to 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 Internation
21、al Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standard
22、s adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject o
23、f patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3126 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommit
24、tee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this document, read “.this European St
25、andard.” to mean “.this International Standard.”. This second edition cancels and replaces the first edition (ISO 3126:1974), which has been technically revised. EN ISO 3126:2005iv Contents page 1 Scope1 2 Normative references .1 3 Terms, definitions and symbols1 3.1 Terms and definitions.1 3.2 Symb
26、ols .1 4 Measuring devices2 4.1 General requirements 2 4.2 Instruments 2 5 Determination of dimensions.3 5.1 General 3 5.2 Wall thicknesses 4 5.3 Diameters.5 5.4 Out-of-roundness .6 5.5 Pipe lengths .6 5.6 End squareness of pipes and fittings.7 6 Determination of other geometrical characteristics re
27、lated to fittings .8 6.1 General 8 6.2 Bends.9 6.3 Branches12 6.4 Reducers14 7 Flanges, loose flanges and collar .15 7.1 General 15 7.2 Outside diameter of the flange, loose flange and collar.17 7.3 Bore diameter of the flange or collar17 7.4 Bolt hole diameter177.5 Bolt hole distribution.17 7.6 Con
28、centricity of bolt circle diameter.17 7.7 Pitch circle diameter.17 7.8 Shoulder diameter of flange and collar18 7.9 Flange and collar thickness .18 7.10 Length of the flange and collar.18 8 Other measurements 18 Bibliography19 EN ISO 3126:200511 Scope This document specifies methods for measurement
29、and/or determination of the dimensions of plastics pipes and fittings and the accuracy of the measurement. It specifies procedures for measuring angles, diameters, lengths, squareness and wall thicknesses for the purposes of checking conformity to geometric limits. NOTE This document is using metric
30、 units. However the procedures and tolerances are applicable to other units by using appropriate conversion factors. 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 ref
31、erences, the latest edition of the referenced document (including any amendments) applies. ISO/R 463, Dial gauges reading in 0,01 mm, 0,001 in and 0,0001 in. ISO 3599, Vernier callipers reading to 0,1 and 0,05 mm. ISO 3611, Micrometer callipers for external measurement. ISO 6507-1, Metallic material
32、s Vickers hardness test Part 1: Test method. 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 accuracy closeness of agreement between a test result and the accepted reference value NOTE The term “accuracy“,
33、 when applied to a set of test results, involves a combination of random components and a common systematic error or bias component (ISO 3534-1). 3.1.2 calibration set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring ins
34、trument or measuring system, or values represented by a material measure or a reference material, and the corresponding values realised by standards 3.1.3 reference standard internationally accepted definition of a given unit of measurement 3.2 Symbols b1: distance between the edge of a flange bolt
35、hole and its bore b2: distance between the edge of a flange bolt hole and its outside diameter b3: distance between the centre of a flange bolt hole and its bore b4: distance between the centre of a flange bolt hole and its outside diameter c1: distance between the edges of two adjacent flange bolt
36、holes c2: distance between the centres of two adjacent flange bolt holes EN ISO 3126:20052 de: outside diameter of a (part of a) component di,m: mean inside diameter of the main of a branch d1: outside diameter of a socket end d2: outside diameter of a spigot end d3: bore of a flange d4: diameter of
37、 a flange bolt hole D : outside diameter of a flange e : wall thickness of a component k : pitch circle diameter of a flange Le,b: effective length of a branch Le,m: effective length of the main of a branch Le,r: effective length of a reducer Le,so: effective length of the socket end of a fitting Le
38、,sp: effective length of the spigot end of a fitting Lstr: length of the straight part of a socket or a spigot end of a fitting Lt: length of the tapered part of a reducer L1: maximum out-of-squareness distance from theoretical L2: measured distance from the root of the angle between a straight rule
39、r and a reference surface to the component along the surface L3: measured distance from the root of the angle between a straight ruler and a reference surface to the component along the ruler L4: vertical distance from a reference surface to the nearest point of the upper end L5: socket insertion de
40、pth L6: overall length of a branch main L7: distance, measured in the centre-line plane of a branch, between the end of the branch spigot or socket to the bottom of the main L8: overall length of a reducer L9: distance between the edges of two selected bolt holes of a flange L10: overall length of a
41、 flange in axial direction : calculated angle of out-of-squareness : angle of bend or branch 4 Measuring devices 4.1 General requirements 4.1.1 Accuracy of measuring devices The measuring device shall be selected so that together with the associated procedures used the required accuracy of the measu
42、red dimension is obtained. EN ISO 3126:200534.1.2 Calibration Device used for measuring shall be calibrated at regular intervals of time in accordance with the quality plan of the user of this document. The calibration shall be traceable to an accredited reference standard (see 3.1.3). 4.2 Instrumen
43、ts 4.2.1 Contact instruments 4.2.1.1 In use the instruments shall not apply a force to the surface of the test piece that will cause local deformation. 4.2.1.2 Measuring devices that require contact between the test piece and one or more surfaces, e.g. a tube micrometer, shall conform to the followi
44、ng: a) the surface in contact with the internal surface of a component shall have a radius less than that of the test piece surface with which it is in contact; b) the surface in contact with the external surface of a component shall be either flat or radiused; c) the contact surfaces of the instrum
45、ent shall have a hardness not less than 500 HV when tested in accordance with ISO 6507-1. 4.2.1.3 Micrometer callipers shall conform to ISO 3611 if applicable. Vernier callipers shall conform to ISO 3599 if applicable. 4.2.1.4 If the measuring instrument incorporates a dial gauge, it shall conform t
46、o ISO/R 463. 4.2.1.5 If the device comprises a circumference tape ( tape), it shall be graduated in diameters expressed in millimetres. When a force of 2,5 N is applied in the longitudinal direction to the extremities of the tape, the elongation of the tape shall not exceed 0,05 mm/m. 4.2.1.6 Measur
47、ing instruments may be used in conjunction with a setting standard of calibrated thickness or length, and then used as a comparator, i.e. to measure small differences between the setting piece and the measured dimension on the test piece. NOTE This is particularly recommended when measuring large di
48、ameter or thick walled components. 4.2.1.7 Go/no-go gauges may be used for checking conformity to specific limits. 4.2.1.8 Contact instruments other than those mentioned in 4.2.1.3, 4.2.1.4, 4.2.1.5 and 4.2.1.7 may also be used. Ultrasonic measuring devices shall be regarded as non-contact instrumen
49、ts (see 4.2.2). 4.2.2 Non-contact instruments If non-contact instruments or devices based on e.g. optical or ultrasonic scanning devices are used, the accuracy of measurement shall conform to accuracy levels specified in the relevant subclause of Clause 5 or their use shall be restricted to finding relevant positions for measurements to be made by other means, e.g. points comprising maximum or minimum dimensions. 5 Determination of dimensions 5.1 General 5.1.1 Ensure that measurement of dimensions is ca
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