BS ISO 11922-2-1997 Thermoplastics pipes for the conveyance of fluids - Dimensions and tolerances - Inch-based series《流体传输用热塑管 尺寸和公差 英制系列》.pdf
《BS ISO 11922-2-1997 Thermoplastics pipes for the conveyance of fluids - Dimensions and tolerances - Inch-based series《流体传输用热塑管 尺寸和公差 英制系列》.pdf》由会员分享,可在线阅读,更多相关《BS ISO 11922-2-1997 Thermoplastics pipes for the conveyance of fluids - Dimensions and tolerances - Inch-based series《流体传输用热塑管 尺寸和公差 英制系列》.pdf(20页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD BS ISO 11922-2:1997 Thermoplastics pipes for the conveyance of fluids Dimensions and tolerances Part 2: Inch-based series ICS 23.040.20BSISO 11922-2:1997 This British Standard, having been prepared under the directionof the Sector Board forMaterials and Chemicals, waspublished under
2、 the authorityof the Standards Boardand comes into effect on 15June1997 BSI 09-1999 ISBN 0 580 27768 2 National foreword This British Standard reproduces verbatim ISO11922-2:1997and implements it as the UK national standard. This British Standard, together with BS2782-11:Method1121C (identical to IS
3、O161-2) and BS ISO4065, partially supersedes BS3867:1987, which becomes obsolescent and retained only to support existing British Standards. The UK participation in its preparation was entrusted to Technical Committee PRI/61, Plastics piping systems and components, which has the responsibility to: a
4、id enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organiza
5、tions represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards
6、Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does
7、not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii to iv, pages 1 to 10 and a back cover. This standard has been updated (see copyright date) and may have had amendments inco
8、rporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO 11922-2:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 11922-2 1ii blankBSISO 11922-2:1997 ii BSI 09-1999
9、 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Normative reference 1 3 Definitions 1 4 Tolerances on outside diameters 2 5 Tolerances on wall thickness 3 6 Measurement of dimensions 7 Annex A (informative) Bibliography 10 Table 1 Tolerances on mean outside diameters Inch-based series 3 Table
10、 2 Tolerances on out-of-roundness Inch-based series 3 Table 3 Tolerances on wall thickness at any point Grade T 5 Table 4 Tolerances on wall thickness at any point Grade U 6 Table 5 Tolerances on wall thickness at any point Grade V 7 Table 6 Tolerances on mean wall thickness Grade W 8 Table 7 Tolera
11、nces on mean wall thickness Grade X 9 Descriptors: Fluid pipelines, pipes (tubes), thermoplastic resins, plastic tubes, form specifications, dimensions, diameters, thickness, dimensional tolerances, form tolerances, imperial system.BSISO 11922-2:1997 BSI 09-1999 iii Foreword ISO (the International O
12、rganization 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. Each member body interested in a subject for which a technical committee has been estab
13、lished 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizat
14、ion. 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 least75% of the member bodies casting a vote. International Standard ISO11922-2was prepared by Technical Committee I
15、SO/TC138, Plastics pipes, fittings and valves for the transport of fluids. Together with ISO11922-1, it cancels and replaces ISO3606:1976, ISO3607:1977, ISO3608:1976and ISO3609:1977. ISO11922consists of the following parts, under the general title Thermoplastics pipes for the conveyance of fluids Di
16、mensions and tolerances: Part1: Metric series; Part2: Inch-based series. Annex A of this part of ISO11922is for information only.iv blankBSISO 11922-2:1997 BSI 09-1999 1 Introduction In the past, International Standards specifying the tolerances to be applied to thermoplastics pipes have covered ind
17、ividual materials separately. The philosophy of ISO11922is to combine these already published standards into a single two-part standard covering the tolerances for extruded pipes manufactured from all thermoplastics materials, thus avoiding the need for a standard to be developed for each individual
18、 material. ISO11922therefore contains a number of tolerance grades covering the mean outside diameter, the out-of-roundness of the outside diameter, the wall thickness at any point and the mean wall thickness. The bodies responsible for writing the various product and system standards will choose, f
19、rom the specified tolerance grades, that grade which is suitable for the application and material involved. 1 Scope This part of ISO11922specifies tolerance grades for the outside diameter, out-of-roundness and wall thickness of inch-based thermoplastics pipes for the conveyance of fluids and manufa
20、ctured with nominal outside diameters and nominal pressures in accordance with ISO161-211 (seeAnnex A). It is applicable to smooth thermoplastics pipes of constant circular cross-section along the whole length of the pipe, whatever the method of manufacture, the pipe material or the intended applica
21、tion. NOTEIt is intended that the tolerance grades specified in product standards be selected from this part of ISO11922, taking into account the material and the intended application. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute
22、provisions of this part of ISO11922. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO11922are encouraged to investigate the possibility of applying the most recent edition of the standard indicated
23、 below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3126:1974, Plastics pipes Measurement of dimensions. 3 Definitions For the purposes of this part of ISO11922, the following definitions apply. 3.1 nominal outside diameter, d n for inch-based series pip
24、e conforming to ISO161-2, the nominal outside diameter serves as a reference outside diameter, expressed in millimetres, to which the permissible deviations are applied as positive and/or negative values 3.2 Outside diameter, d e 3.2.1 mean outside diameter, d em the measured length of the outer cir
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