SANS 3126-2008 Plastics piping systems - Plastics components - Determination of dimensions《塑料管道系统 塑料组成 尺寸测定》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21937-6 SANS 3126:2008Edition 2ISO 3126:2005Edition 2SOUTH AFRICAN NATIONAL STANDARD Plastics piping systems Plastics components Determina

4、tion of dimensions This national standard is the identical implementation of ISO 3126:2005 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fa

5、x: +27 12 344 1568 www.sabs.co.za SABS SANS 3126:2008 Edition 2 ISO 3126:2005 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 138H, Water and sanitation Equipment and systems Plastics pipes and fittings, in acc

6、ordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in September 2008. This document supersedes SABS ISO 3126:1974 (edition 1). Reference numberISO 3126:2005(E)ISO 2005INTERNATIONAL STANDARD ISO3126Second edition200

7、5-03-01Plastics piping systems Plastics components Determination of dimensions Systmes de canalisations en plastiques Composants en plastiques Dtermination des dimensions SANS 3126:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 3126:

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11、. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in

12、 the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reservedSANS 3126:2008This s tandard may only be used and printed by approved sub

13、scription and freemailing clients of the SABS .ISO 3126:2005(E) ISO 2005 All rights reserved 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 carr

14、ied out through ISO technical committees. Each 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.

15、ISO collaborates closely with the International 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 Internat

16、ional Standards. Draft International Standards 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 e

17、lements of this document may be the subject of 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

18、valves for the transport of fluids, Subcommittee 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 t

19、ext of this document, read “.this European Standard.” to mean “.this International Standard.”. This second edition cancels and replaces the first edition (ISO 3126:1974), which has been technically revised. SANS 3126:2008This s tandard may only be used and printed by approved subscription and freema

20、iling clients of the SABS .ISO 3126:2005(E) iv ISO 2005 All rights reservedContents page Forewordv 1 Scope1 2 Normative references .1 3 Terms, definitions and symbols1 3.1 Terms and definitions.1 3.2 Symbols .1 4 Measuring devices2 4.1 General requirements 2 4.2 Instruments 2 5 Determination of dime

21、nsions.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 related to fittings .8 6.1 General 8 6.2 Bends.9 6.3 Branches12 6.4 Reducers14 7 Flanges, loose fl

22、anges 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 Concentricity of bolt circle diameter.17 7.7 Pitch circle diameter.17 7.8 Shoulder diameter of flan

23、ge and collar18 7.9 Flange and collar thickness .18 7.10 Length of the flange and collar.18 8 Other measurements 18 Bibliography19 SANS 3126:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 3126:2005(E) ISO 2005 All rights reserved vFo

24、reword 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 held by NEN in collaboration with Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids“.

25、 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, and conflicting national standards shall be withdrawn at the latest by September 2005. This document is one of a series of standard

26、s on test methods, which support system standards for plastics piping systems and ducting systems. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republi

27、c, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SANS 3126:2008This s tandard may only be used and printed by approv

28、ed subscription and freemailing clients of the SABS .SANS 3126:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 3126:2005(E) ISO 2005 All rights reserved 11 Scope This document specifies methods for measurement and/or determination of

29、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 units. However the proc

30、edures 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 references, the latest edit

31、ion 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 materials Vickers hardness test

32、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“, when applied to a set o

33、f 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 instrument or measuring sys

34、tem, 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 hole and its bore b2: di

35、stance 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 holes c2: distance betwe

36、en the centres of two adjacent flange bolt holes SANS 3126:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 3126:2005(E) 2 ISO 2005 All rights reservedde: outside diameter of a (part of a) component di,m: mean inside diameter of the ma

37、in 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 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

38、 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,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:

39、 maximum out-of-squareness distance from theoretical L2: measured distance from the root of the angle between a straight ruler 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

40、 along the ruler L4: vertical distance from a reference surface to the nearest point of the upper end L5: socket insertion depth 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 L

41、8: overall length of a reducer L9: distance between the edges of two selected bolt holes of a flange L10: overall length of a 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 T

42、he measuring device shall be selected so that together with the associated procedures used the required accuracy of the measured dimension is obtained. SANS 3126:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 3126:2005(E) ISO 2005 Al

43、l rights reserved 34.1.2 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 Instruments 4.2.1 Contact instrume

44、nts 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 following: a) the surface in con

45、tact 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 instrument shall have a hardness

46、 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 to ISO/R 463. 4.2.1.5 If t

47、he 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 Measuring instruments may be us

48、ed 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 diameter or thick walled co

49、mponents. 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 instruments (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