1、BRITISH STANDARDBS EN ISO 8130-4:2010Coating powders Part 4: Calculation of lower explosion limit (ISO 8130-4:1992, including Cor 1: 1993) ICS 87.040Incorporating corrigendum April 2011National forewordThis British Standard is the UK implementation of EN ISO 8130-4:2010. It is identical to ISO 8130-
2、4:1992, including Cor 1:1993. It supersedes BS 3900-J8:1993, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on this committee can be obtained on request to its secretary.The Technical
3、 Committee has reviewed the provisions of ISO 1928, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO 1928 is BS 1016 Methods for analysis and testing of coal and coke Part105:1992 D
4、etermination of gross calorific value.Textual error. When adopting the text of the International Standard, the textual error given below was discovered. It has been marked in the text and has been reported to ISO in a proposal to amend the text of the International Standard.Clause 6 Calibration of t
5、he lower explosion limit “B is a constant equal to 1,24 104 J/m3” should read “B is a constant equal to 1,24 106 J/m3”.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot
6、confer immunity from legal obligations.BS EN ISO 8130-4:2010This British Standard, having been prepared under the direction of the Pigments, Paints and Varnishes Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 April 1993 BSI 2011The fo
7、llowing BSI references relate to the work on this standard: Committee reference PVC/10 Draft for comment 87/54852 DCAmendments/corrigenda issued since publicationDate Comments 30 April 2011 This corigendum renumbers BS 390-J8:193 as BS EN ISO 8130-4:2010ISBN 978 0 580 72112 0EUROPEAN STANDARD NORME
8、EUROPENNE EUROPISCHE NORM EN ISO 8130-4 November 2010 ICS 87.040 English Version Coating powders - Part 4: Calculation of lower explosion limit (ISO 8130-4:1992, including Cor 1:1993) Poudres pour revtement - Partie 4: Calcul de la limite infrieure dexplosibilit (ISO 8130-4:1992, Cor 1:1993 inclus)
9、Pulverlacke - Teil 4: Berechnung der unteren Zndgrenze (ISO 8130-4:1992, einschlielich Cor. 1:1993) This European Standard was approved by CEN on 16 October 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standar
10、d 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 in three official versions (English,
11、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 standards bodies of Austria, Belgium, Bulga
12、ria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
13、STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8130-4:2010: EForeword The text of ISO 8130
14、-4:1992, including Cor 1:1993 has been prepared by Technical Committee ISO/TC 35 “Paints and varnishes” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8130-4:2010 by Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held
15、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 May 2011, and conflicting national standards shall be withdrawn at the latest by May 2011. Attention is drawn to the possibility that some o
16、f 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 organizations of the following countries are bound to impleme
17、nt this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switz
18、erland and the United Kingdom. Endorsement notice The text of ISO 8130-4:1992, including Cor 1:1993 has been approved by CEN as a EN ISO 8130-4:2010 without any modification. BS EN ISO 8130-4:2010EN ISO 8130-4:2010 (E) BSI 2011 11 ScopeThis part of ISO8130 specifies a method for the calculation of t
19、he lower explosion limit of a coating powder,i.e.the minimum concentration of the coating powder in air which will form an explosive mixture. It is based on the knowledge of the gross calorific value of the product, as determined by the method described in ISO1928,or on the gross calorific values of
20、 the constituents of the product.Reliable methods for the measurement of this quantity require the use of special apparatus which may not be readily available, A method for determining the explosion indices of combustible dusts in air is given in ISO6184-1. This method is, however, very intricate, r
21、equires considerable expertise and is expensive. The calculation method leads to lower explosion limits which have been proved in practice to be satisfactory when applied to coating application plants.NOTE 1With powders that are not flammable, such as those of the poly(vinyl chloride) type, the meth
22、od may nevertheless give a value for the lower explosion limit in air. Thus, any underestimation of an explosion risk is effectively avoided.NOTE 2The calculation used in this International Standard is based on the following assumptions:a) that material exists in the form of a molecular dispersion;b
23、) that there is complete combustion of the meterial to the highest oxidation level;c) that there is an adiabatic type of reaction;d) that the flame temperature for the composition with which the minimum concentration for explosion in air is attained is1000C.2 Normative referencesThe following standa
24、rds contain provisions which, through reference in this text, constitute provisions of this part of ISO8130. 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 ISO8130are encouraged to investigate the
25、possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.ISO 842:1984, Raw materials for paints and varnishes Sampling. ISO 1928:1976, Solid mineral fuels Determination of gross calorific v
26、alue by the calorimeter bomb method, and calculation of net calorific value. ISO 6184-1:1985, Explosion protection systems Part 1: Determination of explosion indices of combustible dusts in air. 3 DefinitionFor the purposes of this part of ISO8130, the following definition applies.3.1 lower explosio
27、n limitthe concentration of coating powder, expressed in grams per cubic metre, in a mixture of powder and air, below which self-propagation of flames is not possible4 SamplingTake a representative sample of the product to be tested, as described in ISO842.5 Determination of gross calorific valueEit
28、her measure the gross calorific value H0 of the product under test by the method described in ISO1928, or calculate it by summation of the gross calorific values of the combustible constituents of the product as specified in clause 6 below.6 Calculation of the lower explosion limitCalculate the gros
29、s calorific value H0 of the product under test from those of its combustible constituents by multiplying the gross calorific value of each combustible constituent by the mass present in 1g of product and summing.The quantity H0 is then given bywhereCalculate the lower explosion limit C (the minimum
30、concentration, expressed in grams per cubic metre, for explosion in air), using the equationwhereReport the result to the nearest whole number.n is the number of combustible constituents;ci is the mass fraction of the ith constituent;Hi is the gross calorific value of the ith constituent.A is a cons
31、tant equal to 2,5g/m3;B is a constant equal to 1,24 104 J/m3 a;H0 is the gross calorific value of the coating powder, in joules per gram;a See national foreword for details of textual error.CABH0-+=BS EN ISO 8130-4:2010EN ISO 8130-4:2010 (E)2 BSI 20117 Test reportThe test report shall contain at lea
32、st the following information:a) all details necessary to identify the product tested;b) a reference to this part of ISO 8130 (ISO 8130-4);c) the result of the calculation as indicated in clause 6;d) any deviation from the calculation procedure specified;e) the date of the calculation.BS EN ISO 8130-
33、4:2010EN ISO 8130-4:2010 (E) BSI 2011 3Annex A(informative) Bibliography1 SCHNEWALD, I. Staub-Reinhaltung der Luft, Vol. 31 (1971), No. 9, pp. 376378.2 MEYER, B. Farbe + Lack, 84 (1978), pp. 7576.BS EN ISO 8130-4:2010EN ISO 8130-4:2010 (E)4 blank BSI 2011List of referencesSee national foreword.BS EN
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