1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Thermoplastics pipes and fittings Vicat softening temperaturePart 1: General test method (ISO 2507-1:1995)BS EN ISO 2507-1:2017Incorporating corrigendum May 2018National forewordThis British Standard is the UK implement
2、ation of EN ISO 2507-1:2017. It is identical to ISO 2507-1:1995. Together with BS EN ISO 2507-2:2017 and BS EN ISO 2507-3, it supersedes BS EN 727:1995, which will be withdrawn upon publication of all parts of this standard.The UK participation in its preparation was entrusted to Technical Committee
3、 PRI/88, Plastics piping systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institu
4、tion 2018 Published by BSI Standards Limited 2018ISBN 978 0 539 00871 5ICS 23.040.20; 23.040.45Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2018.Am
5、endments/corrigenda issued since publicationDate Text affected31 May 2018 Implementation of CEN correction notice 25 October 2017: Standard reference correctedBRITISH STANDARDBS EN ISO 2507-1:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2507-1October 2017ICS 23.040.20; 23.040.45 Superse
6、des EN 727:1994EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN ISO 2507-1:2017: EAll rights of exploitation in any form and by any means reserved worldwide for CEN
7、national MembersThermoplastics pipes and fittings - Vicat softening temperature - Part 1: General test method (ISO 2507-1:1995)Tubes et raccords en matires thermoplastiques - Temprature de ramollissement Vicat - Partie 1: Mthode gnrale dessai (ISO 2507-1:1995)Rohre und Formstcke aus Thermoplasten -
8、Vicat-Erweichungstemperatur - Teil 1: Allgemeines Prfverfahren (ISO 2507-1:1995)This European Standard was approved by CEN on 19 September 2017.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 n
9、ational standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A v
10、ersion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus,
11、 Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Unite
12、d Kingdom.English VersionEN ISO 2507-1:2017 (E)European ForewordThe text of ISO 2507-1:1995 has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings and valves for the transport of fluids” of the International Organization for Standardization (ISO) and has been taken over as EN
13、ISO 2507-1:2017 by Technical Committee CEN/TC 155 “Plastics piping systems 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 April 2018 a
14、nd conflicting national standards shall be withdrawn at the latest by October 2020.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document super
15、sedes EN 727:1994.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Mace
16、donia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 2507-1:1995 has been approve
17、d by CEN as a EN ISO 2507-1:2017 without any modification.2BS EN ISO 2507-1:2017ISO 2507-1:1995Foreword ivIntroduction v1 Scope . 12 Normative references 13 Principle 14 Apparatus . 15 Test pieces . 25.1 Sampling . 25.1.1 Pipes . 25.1.2 Fittings 35.2 Preparation 35.3 Number of test pieces . 36 Condi
18、tioning 37 Procedure. 38 Test report . 4 ISO 1995 All rights reserved iiiContents PageBS EN ISO 2507-1:2017ISO 2507-1:1995ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International S
19、tandards 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 liaison with ISO, als
20、o take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internatio
21、nal Standard requires approval by at least 75 % of the member bodies casting a vote.International Standard ISO 2507-1 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves o
22、f plastic materials and their accessories Test methods and basic specifications .This first edition of ISO 2507-1, and ISO 2507-2, cancels and replaces the second edition of ISO 2507 (ISO 2507:1982), of which it constitutes a technical revision.ISO 2507 consists of the following parts, under the gen
23、eral title Thermoplastics pipes and fittings Vicat softening temperature: Part 1: General test method 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) pip
24、es Part 3: Test conditions for acrylonitrile/butadiene/styrene (ABS) and acrylonitrile/styrene/acrylic ester (ASA) pipes and fittingsiv ISO 1995 All rights reservedBS EN ISO 2507-1:2017ISO 2507-1:1995IntroductionThis International Standard is based on ISO 306.For convenience of use, it has been cons
25、idered preferable to draw up a complete document for use in determining the Vicat softening temperature of thermoplastics pipes and fittings. For further details, reference to ISO 306 is recommended.Please note, however, that ISO 306 is applicable to materials in the form of sheets, whereas this Int
26、ernational Standard is applicable to materials in the form of pipes and fittings.ISO 2507 comprises three parts: the first gives the general conditions under which the Vicat softening temperature of a pipe or fitting is determined, the other two parts provide the particular requirements for conducti
27、ng tests on pipes and fittings of different materials (see the Foreword).The basic specifications for various materials are given in the informative annexes of the appropriate parts. ISO 1995 All rights reserved vBS EN ISO 2507-1:2017This page deliberately left blankThermoplastics pipes and fittings
28、 Vicat softening temperature Part 1: General test method1 ScopeThis part of ISO 2507 specifies a general method for determining the Vicat softening temperature of thermoplastics pipes and fittings. It includes the adaptation of method of ISO 306:1994, using a force of 50 N.This method is applicable
29、only to thermoplastics materials for which it is possible to measure the temperature at which their rate of softening becomes rapid.It is not applicable to crystalline or semi-crystalline polymers.2 Normative referencesThe following standards contain provisions which, through reference in this text,
30、 constitute provisions of this part of ISO 2507. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 2507 are encouraged to investigate the possibility of applying the most recent editions of the st
31、andards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.ISO 291:1977, Plastics Standard atmospheres for conditioning and testing.ISO 306:1994, Plastics Thermoplastic materials D etermination of Vicat softening temperature (VST).3 PrincipleDetermi
32、nation of the temperature at which a standard indenter, under a force of 50 N 1 N, penetrates 1 mm into the surface of a test piece cut from the wall of a pipe or fitting while the temperature is raised at a constant rate.The temperature at which the penetration is 1 mm is called the Vicat softening
33、 temperature (VST), in degrees Celsius.4 Apparatus4.1 Rod, provided with a load-carrying plate (4.4), held in a rigid metal frame so that it can move freely in the vertical direction, the base of the frame serving to support the test piece under the indenting tip at the end of the rod (see figure 1)
34、.If the rod and the components of the frame do not have the same coefficient of linear thermal expansion, their differential change in length introduces an error into the readings. A blank test shall be carried out for each apparatus using a test piece of rigid material with a low coefficient of exp
35、ansion. This test shall cover the whole range of service temperatures and a correction term shall be determined for each temperature. If the correction term is greater than or equal to 0,02 mm, its algebraic sign shall be noted and the correction shall be applied to each test by adding it to the val
36、ue observed for apparent INTERNATIONAL STANDARD ISO 2507-1:1995 ISO 1995 All rights reserved 1BS EN ISO 2507-1:2017ISO 2507-1:1995penetration. It is recommended that the apparatus be constructed using an alloy with a low coefficient of thermal expansion.4.2 Indenting tip, preferably of hardened stee
37、l, 3 mm long and having a circular cross-section with an area of 1 mm2 0,015 mm2, fixed at the bottom of the rod (4.1). The lower surface of the indenting tip shall be plane and perpendicular to the axis of the rod, and free from burrs.4.3 Micrometer dial gauge (or any other measuring instrument), f
38、or measuring the penetration of the indenting tip into the test piece to within 0,01 mm. The thrust of the dial gauge, which contributes to that applied to the test piece, shall be known (see 4.4).4.4 Load-carrying plate, fixed to the rod (see 4.1), and weights located centrally so that the total th
39、rust applied to the test piece can be adjusted to 50 N 1 N. The downward thrust due to combined effects of the rod, indenting tip, load-carrying plate and the thrust of the dial gauge spring shall not exceed 1 N.4.5 Heating bath, containing, if possible, a suitable liquid (see notes 1 and 2) in whic
40、h the apparatus is immersed so that the test piece is at least 35 mm below the surface of the liquid. An efficient stirrer shall be provided. The heating bath shall be equipped with a means of control such that the temperature can be raised at a uniform rate of 50 C/h 5 C/h.The rate of temperature r
41、ise shall be considered to be satisfactory if the difference in temperature measured for each interval of 6 min during the test does not exceed 5 C 0,5 C.1 Paraffin oil, transformer oil, glycerol and silicone oils may be suitable for heat-transfer fluids, but other liquids may be used. In all cases,
42、 it should be established that the liquid chosen is stable at the test temperatures used and does not affect the product under test, for example by softening, swelling or cracking.If no liquid is suitable as a heat-transfer fluid, the oven with air circulation should be used (4.7).2 The test results
43、 can be dependent on the thermal conductivity of the heat transfer medium.3 The uniform rate of temperature rise can be obtained by controlling the heat either manually or automatically, although the latter is strongly recommended. One method found to give satisfactory results is to use an immersion
44、 heater adjusted to give the desired rate of temperature rise from the initial test temperature and then to increase the heating power (either by means of the immersion heater itself, or by means of a subsidiary heater) by adjustment of a rheostat or a variable transformer.4 It is advisable to have
45、a cooling coil in the liquid of the heating bath, in order to reduce the time required to lower the temperature between two consecutive tests. This coil should be removed or drained before starting a new test, since boiling liquid which has been used as coolant can affect the rate of temperature ris
46、e.4.6 Mercury-in-glass thermometer, partial immersion type (or any other suitable temperature-measuring device), having appropriate graduations and accurate to 0,5 C. Each mercury-in-glass thermometer shall be calibrated for the depth of immersion specified in 7.3.4.7 Oven with air circulation, in w
47、hich the temperature can be maintained at the value specified in that part of ISO 2507 relevant to the applicable material.5 Test pieces5.1 Sampling5.1.1 PipesThe test pieces shall consist of segments of rings, removed from the pipes, limited by cross-sections and having the following dimensions: le
48、ngth: approximately 50 mm;2 ISO 1995 All rights reservedBS EN ISO 2507-1:2017ISO 2507-1:1995 width: between 10 mm and 20 mm.5.1.2 FittingsThe test pieces shall consist of segments of rings taken from the sockets, spigots or other cylindrical parts of the fitting, limited by cross-sections and with t
49、he length equal to: the length of the socket, for fittings of diameter less than or equal to 90 mm; 50 mm, for fittings of a diameter greater than 90 mm.Their width shall be between 10 mm and 20 mm.Cut the test pieces from a zone which does not include a weld line or injection point.5.2 Preparation5.2.1 If the wall thickness of the pipe or fittings is greater than 6 mm, reduce it to 4 mm by machining the outer surface only of the pipe or fitting, by a suitable technique.If the socket of the fitting is threaded, machine th
