1、BRITISH STANDARD BS EN ISO 580:2005 The European Standard EN ISO 580:2005 has the status of a British Standard ICS 23.040.45 Plastics piping and ducting systems Injection-moulded thermoplastics fittings Methods for visually assessing the effects of heatingBS EN ISO 580:2005 This British Standard was
2、 published under the authority of the Standards Policy and Strategy Committee Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The B
3、SI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the official English language version of EN ISO 580:2005. It is identical with ISO 580:2005. It supersedes
4、 BS EN 763:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee PRI/88, Plastic piping systems, to Subcommittee PRI/88/4, Method of tests for plastic piping systems and components, which has the responsibility to: A list of organizations represented o
5、n this subcommittee can be obtained on request to its secretary. The principal changes with respect to BS EN 763:1995 are as follows: a) the standard is not restricted to PVC-U fittings but covers thermoplastics fittings man- ufactured from ABS, PE, PP, PVC-U, PVC-C and SAN+PVC; b) in the absence of
6、 guidance from the referring standard, heating time and temperature test parameters are specified in Table 1 for all materials. The relationship between heating time and fitting wall thickness is maintained as previously standardized but the test temperature is dependent upon the material; a tempera
7、ture of 110 C is specified for PE and 150 C for ABS, PP, PVC-U, PVC-C and SAN+PVC; c) the procedure, described in 4.3.5, for cutting the test piece for examination after heating is more detailed by virtue of the specification of the minimum number of cuts dependent on the diameter of the test piece;
8、 d) in the absence of guidance from the referring standard, the procedure for the examination for defects in the gating area (4.3.6) has been enhanced by specific reference to Figure 1 where gating area is defined dimensionally; e) the liquid used in the liquid bath immersion technique remains unspe
9、cified but guidance in the form of a note is given in 5.1.1 regarding the suitability of some liquids in terms of safety or health hazards and possible adverse effects on the material tested. Cross-references The British Standards which implement international or European publications referred to in
10、 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. This publication does not purport to include all the necessary provisions of a
11、 contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or propos
12、als for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, p
13、ages 1 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. on 14 November 2005 BSI 14 November 2005 ISBN 0 580 47237 X EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 580 February 2005 ICS 23.040.45 Su
14、persedes EN 763:1994 English version Plastics piping and ducting systems - Injection-moulded thermoplastics fittings - Methods for visually assessing the effects of heating (ISO 580:2005) Systmes de canalisations et de gaines en plastiques - Raccords thermoplastiques mouls par injection - Mthodes de
15、ssai pour estimer visuellement les effets de la chaleur (ISO 580:2005) Kunststoff-Rohrleitungs- und Schutzrohrsysteme- Spritzguss-Formstcke aus Thermoplasten - Verfahren fr die visuelle Beurteilung der Einflsse durch Warmlagerung (ISO 580:2005) This European Standard was approved by CEN on 21 Januar
16、y 2005. 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 bibliographical references concerning such national standards may be obtai
17、ned 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 member into its own language and notified to the Central Secre
18、tariat 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Por
19、tugal, 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 All rights of exploitation in any form and by any means reser
20、ved worldwide for CEN national Members. Ref. No. EN ISO 580:2005: E Foreword This document (EN ISO 580:2005) has been prepared 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 sys
21、tems and ducting systems“, the secretariat of which is held by NEN. 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 August 2005, and conflicting national standards shall be withdrawn at the latest
22、 by August 2005. This document supersedes EN 763:1994. 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 Republic, Denmark, Estonia, Finland, France, German
23、y, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 580:2005 has been approved by CEN as EN ISO 580:2005 without any modificatio
24、ns. EN ISO 580:2005 Reference number ISO 580:2005(E)INTERNATIONAL STANDARD ISO 580 Third edition 2005-02-15 Plastics piping and ducting systems Injection-moulded thermoplastics fittings Methods for visually assessing the effects of heating Systmes de canalisations et de gaines en plastiques Raccords
25、 thermoplastiques mouls par injection Mthodes dessai pour estimer visuellement les effets de la chaleur EN ISO 580:2005ii EN ISO 580:2005 iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepa
26、ring 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 to be represented on that committee. International organizations, governmental and non-governmental, in l
27、iaison with ISO, also take part in the work. 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 o
28、f technical committees is to prepare International 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 i
29、s 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. ISO 580 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of
30、 fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and their accessories Test methods and basic specifications. This third edition cancels and replaces the second edition (ISO 580:1990), which has been technically revised. EN ISO 580:2005 iv Introductio
31、n The test for determination of the resistance to heat according to the two test methods specified in this International Standard is applicable for distinguishing between properly and improperly moulded thermoplastics pipe fittings. It can be used to determine whether cold slugs (pieces of material
32、that enter the mould at a temperature significantly lower than the rest of the mass) or unfused areas are present, reveal cavities and porosity, determine the amount of moulded-in stress produced by the moulding process, reveal contamination, and show the integrity of the fusion line. A stress-free
33、part will generally have better properties and higher strength than parts with a higher degree of residual stress and will generally be less reactive when exposed to chemicals. By placing moulded fittings in a heated medium (air or liquid) at elevated temperature for a period of time dependant on th
34、eir wall thickness, it is possible to detect internal stress. Since the stresses start to be released as soon as the material passes to the rubbery state, it is only necessary to maintain the moulded pieces at a higher temperature for a defined period of time. NOTE Injection-moulded fittings can be
35、made by a number of techniques, whereby the material is injected into the mould cavity. These include single- or multi-point injection, diaphragm gating and ring gating. The technique used in the manufacture of mouldings will affect the way in which they are assessed. 1Plastics piping and ducting sy
36、stems Injection-moulded thermoplastics fittings Methods for visually assessing the effects of heating 1 Scope This International Standard specifies two methods for assessing the effects of heating on injection-moulded thermoplastics pipe fittings method A, using an air oven, and method B, using a li
37、quid bath. In case of disagreement, method A is the reference method. This International Standard is applicable to cement-welded fittings as well as to flanged fittings and fittings incorporating elastomeric seals and to fittings consisting of the assembly of several moulded parts (e.g. union connec
38、tors). It is applicable to both pressure and non-pressure fittings. 2 Principle Complete mouldings are subjected to an elevated specified temperature in an air-circulating oven or a liquid bath for a given period of time, depending upon the wall thickness of the fitting and the material being moulde
39、d. The surfaces of the moulding are examined before and after heating, and any cracks, blisters, delaminations or opening of fusion lines are measured and expressed as a percentage of the wall thickness. 3 Test parameters The following test parameters are specified by the subclauses referenced as fo
40、llows and in Table 1 for the particular material used in the manufacturer of the fitting, unless the referring standard (a standard making reference to this International Standard in its own provisions) or regulations specify otherwise: a) the test temperature, T (see 4.1.1 and 4.3); b) the number o
41、f test pieces (see 4.2.2); c) the heating time, t (see 4.3.3); d) the test method to be used and, for method B (liquid bath) only, the test liquid. e) the acceptable limits for the occurrence or dimensions of any cracks or other features found (see 4.3.6). EN ISO 580:20052 Unless otherwise specified
42、 in the referring standard or regulations, the test parameters shall be in accordance with Table 1. Table 1 Test parameters to be used in absence of guidance in the referring standard Heating time Material Temperature T 2 C Mean wall thickness e mmm Duration t min ABS 150 PE 110 PP PVC-U PVC-C SAN+P
43、VC 150 e mu 3 3 e mu 10 10 e mu 20 20 e mu 30 30 e mu 40 40 e m15 30 60 140 220 240 4 Method A 4.1 Apparatus 4.1.1 Air-circulating oven, thermostatically controlled, equipped with a thermostat so that the temperature of the working zone can be maintained at the prescribed test temperature throughout
44、 the test and of sufficient heating capacity to enable the test temperature to be regained within 15 min of insertion of the test pieces. 4.1.2 Thermometer, graduated in 0,5 C. Or a type “T” thermocouple with a resolution of 0,1 C and an accuracy of at least 0,8 C. 4.2 Test pieces 4.2.1 Preparation
45、After removing any runners, take the complete mouldings as test pieces. If the fitting incorporates an elastomeric sealing ring, remove the ring before testing. In the case of fittings assembled from more than one element, separate the components and test them out of contact with each other. 4.2.2 N
46、umber The number of test pieces shall be as specified in the product standard. In the absence of any information on the number of test pieces, use at least three pieces. 4.3 Procedure 4.3.1 Set the oven temperature (4.1.1) at the test temperature (T 2) C in accordance with the product standard or Ta
47、ble 1. 4.3.2 Put the test pieces in the oven and arrange them so that they are standing on one side of their sockets wherever possible, avoiding contact with another test piece or the sides of the oven. EN ISO 580:200534.3.3 Leave the test pieces in the oven until the oven returns to the test temper
48、ature (T 2) C and for a further period, t, dependent on the mean wall thickness, e m , of the thickest part of the test piece(s) in accordance with the product standard or Table 1. 4.3.4 Remove the test pieces from the oven, taking care not to deform or damage them. 4.3.5 Cut the test pieces with a
49、sharp knife or razor blade while they are still hot, to enable the dimensions of cracks, blisters, delaminations and weld-line openings, if any, to be measured as required. Allow the test pieces and/or parts therefrom to cool in air until they can be handled without deformation. If not otherwise specified in the referring standard, the following number of cuts should be made: for cylindrical components of d nu 160 mm, not less than two cuts equally
