1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 6556:2012Laboratory glassware FilterflasksBS EN ISO 6556:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 6556:2012.It sup
2、ersedes BS 1739:1982 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee LBI/36, Laboratory glassware and related apparatus.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to
3、 include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 72519 7ICS 71.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This
4、British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6556 October 2012 ICS 71.040.20 English Version Laboratory glassware - Fil
5、ter flasks (ISO 6556:2012) Verrerie de laboratoire - Fioles filtrer (ISO 6556:2012) Laborgerte aus Glas - Saugflaschen (ISO 6556:2012) This European Standard was approved by CEN on 30 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condit
6、ions 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 obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists
7、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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standa
8、rds bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, 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, Slovakia, Slov
9、enia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide f
10、or CEN national Members. Ref. No. EN ISO 6556:2012: EBS EN ISO 6556:2012EN ISO 6556:2012 (E) 3 Foreword This document (EN ISO 6556:2012) has been prepared by Technical Committee ISO/TC 48 “Laboratory equipment“ in collaboration with Technical Committee CEN/TC 332 “Laboratory equipment” the secretari
11、at of which is held by DIN. 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 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the
12、 possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countr
13、ies are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola
14、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6556:2012 has been approved by CEN as a EN ISO 6556:2012 without any modification. BS EN ISO 6556:2012ISO 6556:2012(E) ISO 2012 All rights reserved iiiContents Pag
15、eForeword iv1 Scope 12 Normative references . 13 Series and capacities . 14 Material . 15 Construction . 15.1 Pressure strength 15.2 Shape 15.3 Radius of curvature of base . 25.4 Wall thickness 25.5 Neck 25.6 Protective coating . 26 Series A filter flasks 26.1 Vacuum connection (side-arm) 26.2 Dimen
16、sions . 47 Series B filter flasks 47.1 Vacuum connection (side-arm) 47.2 Dimensions . 58 Thermal shock endurance 59 Inscriptions . 5Annex A (normative) Type test for pressure strength 7Bibliography . 9BS EN ISO 6556:2012ISO 6556:2012(E)ForewordISO (the International Organization for Standardization)
17、 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 established has the right to be repre
18、sented 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 standardization.International Standards are
19、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 Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International
20、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 of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 6556 was prepared
21、by Technical Committee ISO/TC 48, Laboratory equipment, and by Technical Committee CEN/TC 332, Laboratory equipment in collaboration.This second edition cancels and replaces the first edition (ISO 6556:1981), which has been technically revised to incorporate the following modifications.a) Filter fla
22、sks of cylindrical shape with capacities of 3 l to 20 l have been added.b) Two series of filter flasks have been introduced to meet market needs.c) The glass material for filter flasks has been limited to borosilicate glass 3.3.d) A requirement for thermal shock endurance of filter flasks has been a
23、dded.e) The dimensions and figures have been updated to the state of manufacturing.iv ISO 2012 All rights reservedBS EN ISO 6556:2012INTERNATIONAL STANDARD ISO 6556:2012(E)Laboratory glassware Filter flasks1 ScopeThis International Standard specifies requirements to filter flasks with conical or cyl
24、indrical shape for general laboratory purposes.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any a
25、mendments) applies.ISO 718, Laboratory glassware Thermal shock and thermal shock endurance Test methodsISO 3585, Borosilicate glass 3.3 Properties3 Series and capacitiesTwo series of filter flasks are specified.Series A filter flasks have either a conical shape (see Figure 1) with nominal capacities
26、 of 100 ml, 250 ml, 500 ml, 1 000 ml and 2 000 ml, or a cylindrical shape (see Figure 2) with nominal capacities of 3 l, 5 l, 10 l, 15 l and 20 l.Series B filter flasks have a conical shape and a different choice of vacuum connections compared to Series A filter flasks and have nominal capacities of
27、 25 ml, 50 ml, 125 ml, 250 ml, 500 ml, 1 000 ml, 2 000 ml and 4 000 ml.4 MaterialFilter flasks shall be made of borosilicate glass 3.3 conforming with ISO 3585; the glass shall be reasonably free from residual strain and from glass defects which might impair safety, durability or appearance.5 Constr
28、uction5.1 Pressure strengthFilter flasks shall be constructed so as to withstand a pressure differential (external-internal) of 2 bar (1 bar = 105Pa), i.e. twice the pressure in normal use, when tested in accordance with the test method specified in Annex A.For this purpose, the dimensions given for
29、 wall thickness and radius of curvature given in Tables 1 to 3 shall be observed.5.2 ShapeFilter flasks shall be conical or cylindrical. The base of the flasks shall be so constructed that they stand vertically without rocking or spinning when placed on a level surface. ISO 2012 All rights reserved
30、1BS EN ISO 6556:2012ISO 6556:2012(E)5.3 Radius of curvature of baseThe base of the flask shall have a suitable radius of curvature in order to provide a smooth transition between the base and the side. The radius shall be not less than that given in Tables 1 to 3.5.4 Wall thicknessThe flask shall be
31、 blown so as to achieve a good distribution of glass in the mould without sudden changes in wall thickness. In order to meet the requirements of 5.1, the thinnest areas shall have a thickness not less than the minimum values specified in Tables 1 to 3.5.5 NeckThe top of the neck shall be formed to p
32、rovide suitable strength. The neck may be slightly tapered or cylindrical; alternatively, it may be manufactured with an interchangeable joint of appropriate size selected from ISO 383.5.6 Protective coatingFor protection against mechanical damage (impact or shock), filter flasks may have an externa
33、l plastic coating.6 Series A filter flasks6.1 Vacuum connection (side-arm)The vacuum connection shall be placed just at, or below, the cylindrical part of the neck (see Figure 1 and Figure 2). Three types of vacuum connection are described:a) a tubular side-arm as shown in Figure 3 with a taper of 1
34、:5 to 1:10;b) an integral side-arm with a glass round thread as shown in Figure 4;c) a detachable side-arm; a typical arrangement with a resilient grommet is shown in Figure 5. A detachable side-arm may also be provided with an appropriate glass round thread.2 ISO 2012 All rights reservedBS EN ISO 6
35、556:2012ISO 6556:2012(E)Key1 vacuum connectionFigure 1 Conical shapeKey1 vacuum connectionFigure 2 Cylindrical shape ISO 2012 All rights reserved 3BS EN ISO 6556:2012ISO 6556:2012(E)6.2 DimensionsSeries A filter flasks of conical shape shall comply with the dimensions given in Table 1. Series A filt
36、er flasks of cylindrical shape shall comply with the dimensions in Table 2.Table 1 Dimensions for Series A conical shapesDimensions in millimetresNominal sizemld13d21,5h3rmin.s1min.s2min.100 70 24 105 12 1,7 1,2250 85 35 155 12 2,4 1,3500 105 35 185 15 3 1,41 000 135 45 230 20 3,8 1,62 000 165 60 25
37、5 35 4,2 1,8Table 2 Dimensions for Series A cylindrical shapesDimensions in millimetresNominal sizeld15d21,5h5r1r2s1min.s2min.3 170 70 295 28 40 4,7 45 185 80 360 30 48 5,1 410 237 80 420 48 54 6,4 415 257 85 500 48 58 7,0 420 287 85 535 60 79 7,7 47 Series B filter flasks7.1 Vacuum connection (side
38、-arm)The vacuum connection shall be placed near the neck-to-body junction, and sufficiently below the top of the neck that a potential blockage of the vacuum inlet by neck closures is avoided.The following types of vacuum connection are described:a) plain, without provision for direct connection to
39、vacuum tubing;b) with integral side-arm:1) tubular side-arm with corrugated outside surface for interfacing with the inside of vacuum tubing;2) tubular side-arm with tapered cone for interfacing with the outside of vacuum tubing;3) tubular side-arm with glass round thread for interfacing with a matc
40、hing connector;c) with replaceable side-arm of glass or plastic material:1) straight;2) angled;3) multiple replaceable side-arms.4 ISO 2012 All rights reservedBS EN ISO 6556:2012ISO 6556:2012(E)7.2 DimensionsSeries B filter flasks shall comply with the dimensions given in Table 3.Table 3 Dimensions
41、for Series B filter flasksDimensions in millimetresNominal sizemld1max.hmax.rmin.s1min.25 41 77 6 1,050 52 85 6 1,5125 71 115 12 1,5250 86 160 12 1,8500 108 190 15 2,01 000 138 245 20 2,02 000 170 305 23 2,54 000 210 385 26 3,08 Thermal shock enduranceFilter flasks shall be type tested to comply wit
42、h a thermal shock endurance of 75 C in accordance with ISO 718.9 InscriptionsThe following inscriptions shall be permanently and legibly marked on all filter flasks:a) the nominal capacity of the flask, for example “100 ml”;b) the makers and/or vendors name or mark;c) the type of glass from which th
43、e flask is made, if not identified by the makers name or mark.Figure 3 Tubular side-arm and inserted vacuum rubber tubeFigure 4 Integral side-arm with glass round thread ISO 2012 All rights reserved 5BS EN ISO 6556:2012ISO 6556:2012(E)Figure 5 Detachable side-arm6 ISO 2012 All rights reservedBS EN I
44、SO 6556:2012ISO 6556:2012(E)Annex A (normative) Type test for pressure strengthA.1 GeneralThe filter flask is tested in a pressure vessel by subjecting it to a hydraulic external pressure of 2 bar for 1 min.A.2 ApparatusA.2.1 Pressure vessel, provided with a pressure gauge and connected to a water r
45、eservoir fitted with a ram pump and a release valve discharging back into the reservoir. The lid of the pressure vessel can be fastened to the vessel by means of wing-nuts for ease of operation.The recommended apparatus is illustrated in Figure A.1.A.3 ProcedureClose the filter flask by appropriate
46、means, for example stoppers, the interior of the filter flask being under atmospheric pressure (about 1 bar). To ensure submersion, hold the filter flask in the pressure vessel in some holding device; alternatively, place weights wrapped in paper or cloth inside it. Having placed the filter flask in
47、 position and fastened the lid, fill the pressure vessel with water and bring up the gauge pressure to 2 bar by working the ram pump and release it immediately after 1 min.A.4 ResultThe filter flask shall be taken to have satisfied the requirement of the test if it withstands the hydraulic external
48、pressure of 2 bar for 1 min. ISO 2012 All rights reserved 7BS EN ISO 6556:2012ISO 6556:2012(E)Key1 pressure relief valve2 funnel3 pressure gauge4 pump5 valves6 reservoirFigure A.1 Test rig for pressure strength8 ISO 2012 All rights reservedBS EN ISO 6556:2012ISO 6556:2012(E)Bibliography1 ISO 383, La
49、boratory glassware Interchangeable conical ground joints ISO 2012 All rights reserved 9This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. BSI is incorporated by Royal Charter. British Standards and other standardisation products are published by BSI Standar
