BS-EN-13966-1-2003.pdf

BRITISH STANDARD BS EN 13966-1:2003 Determination of the transfer efficiency of atomising and spraying equipment for liquid coating materials Part 1: Flat panels The European Standard EN 13966-1:2003 has the status of a British Standard ICS 87.100 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13966-1:2003 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 10 October 2003 © BSI 10 October 2003 ISBN 0 580 41885 5 National foreword This British Standard is the official English language version of EN 13966-1:2003. The UK participation in its preparation was entrusted by Technical Committee MCE/3, Safeguarding of machinery, to Subcommittee MCE/3/8, Thermoprocessing equipment Safety, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Additional information The UK voted against the acceptance of this European Standard at Formal Vote stage for the following reasons. Cross-references The British Standards which implement international or European publications referred to in 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 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 proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. The direction of the spray-booth air-flow direction given in 6.4.1 is different to the direction commonly used for testing in the UK. The UK believe that 6.10 does not contain the information necessary to determine the mass of coating material delivered by the atomizer for method 1 gravimetrically. The UK also drew attention to the fact that the measurement accuracy tolerance given in Annex A for the weighing of the coating material deposit is, in their view, too large. Finally, the UK consider that the contents of Annex C do not allow for the correct recording of test results. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13966-1 April 2003 ICS 87.100 English version Determination of the transfer efficiency of atomising and spraying equipment for liquid coating materials - Part 1: Flat panels Détermination de l'efficacité de transfert des équipements d'atomisation/pulvérisation pour produits de revêtement liquides - Partie 1: Panneaux plans Bestimmung des Auftragswirkungsgrades von Spritz- und Sprühgeräten für Beschichtungsstoffe - Teil 1: Flächenbeschichtung This European Standard was approved by CEN on 28 November 2002. 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 obtained on application to the Management Centre 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13966-1:2003 E Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 2 Contents Page Foreword3 1Scope 4 2Normative references 5 3Terms and definitions5 4Principle of test6 5Test procedure.6 6Test and measurement methods8 6.1Test environment.8 6.2Determination of coating material physical properties .8 6.3Test sheet and background panel9 6.4Test rig configuration11 6.5Atomiser characteristics.11 6.6Application of the coating material to the test sheet.12 6.7Coating finish quality and performance12 6.8Coating film drying / curing12 6.9Determination of coating material mass .12 6.10Determination of mass of coating material delivered by the atomiser 13 7Calculation13 8Test report 14 9Accuracy.15 Annex A (normative) Measurement tolerances16 Annex B (informative) Example calculations17 Annex C (content and structure normative; lay-out informative) Test summary form for flat panel coating 18 Bibliography20 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 3 Foreword This document (EN 13966:2003) has been prepared by Technical Committee CEN/TC 271, “Surface treatment equipment - Safety“, the secretariat 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 October 2003, and conflicting national standards shall be withdrawn at the latest by October 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 4 Introduction Transfer efficiency is a performance parameter that is used to express the effectiveness of spraying or atomising equipment in transferring a coating material to the surface of an object. Transfer efficiency is defined as the ratio of coating solids laid down on the surface of an object and forming the dry film to the total solid content of the coating material delivered by the atomising and spraying equipment, expressed as a percentage. The use of atomising and spraying equipment with a high transfer efficiency therefore has economic and environmental benefits. A standard and reproducible procedure for determining the transfer efficiency is required to: enable a reliable comparison of atomising and spraying equipment through transfer efficiency data quoted by manufacturers; provide data to show that the atomising and spraying equipment meets minimum values stipulated in health, safety and environmental legislation. 1 Scope This European Standard specifies a laboratory procedure for determining the transfer efficiency of atomising and spraying equipment for the application of liquid coating materials onto flat panels. A second part (to be prepared) will cover coating material application to other substrate geometries and provide a method for the determination of transfer efficiency for atomising and spraying equipment with electrostatic support. This standard applies to the determination of the transfer efficiency of atomising and spraying equipment, such as, but not limited to: conventional air atomiser (high air pressure); HVLP-atomiser (high volume low pressure); LVLP-atomiser (low volume low pressure); airless atomiser (hydraulic pressure); air assisted airless atomiser; vibratory or rotary atomiser (bells); electrostatic supported atomiser. Two methods of determination are included in the standard. The transfer efficiency value resulting from the application of this standard procedure expresses the potential performance of atomising and spraying equipment for comparison of different types or models. The value may or may not be attained in use, where the working conditions and operator practice are likely to differ from those of the standard test method. The determined transfer efficiency is valid only in conjunction with the parameters shown in the test summary form, see annex C. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 5 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to the European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including amendments). EN 971-1, Paints and varnishes: Terms and definitions for coating materials. Part 1: General terms EN 1953, Atomising and Spraying Equipment for Coating Materials - Safety requirements prEN 12215, Coating plants - Spray booths for application of organic liquid coating materials - Safety requirements prEN 13355, Coating plants - Combined booth Safety requirements EN 21512, Paints and Varnishes: Sampling of products in liquid or paste form EN ISO 1513, Paints and Varnishes - Examination and preparation of samples for testing.(ISO 1513:1992) EN ISO 2431, Paints and varnishes - Determination of flow time by use of flow cups (ISO 2431:1993, including Technical Corrigendum 1:1994). EN ISO 3219, Plastics - Polymers/resins in the liquid state or as emulsions or dispersions - Determination of viscosity using a rotational viscometer with defined shear rate (ISO 3219:1993) EN ISO 3251, Paints and varnishes - Determination of non-volatile matter of paints, varnishes and binders for paints and varnishes (ISO 3251:1993) ISO 2811-1, Paints and varnishes - Determination of density - Part 1: Pyknometer method ISO 2811-2, Paints and varnishes - Determination of density - Part 2: Immersed body (plummet) method ISO 2811-3, Paints and varnishes - Determination of density - Part 3: Oscillation method ISO 2811-4, Paints and varnishes - Determination of density - Part 4: Pressure cup method ISO 2884, Paints and varnishes - Determination of viscosity using rotary viscometer ISO 9944, Plastics; phenolic resins; determination of electrical conductivity of resins extracts 3 Terms and definitions For the purposes of this standard, the terms and definitions given in EN 971-1 apply. For the purposes of this standard, the following terms and definitions also apply: 3.1 application time time during which coating material is applied to the test sheet during the transfer efficiency test 3.2 atomising and spraying equipment any type of device which can be used to atomise coating materials. Atomising may be achieved by air, hydromechanically (airless) with or without air assistance, or by centrifugal forces such as rotating bells or discs, as defined in EN 1953 3.3 background panel rigid plate placed behind the test sheet to support it and enable a flat surface to be obtained Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 6 3.4 coating material liquid product, pigmented or non pigmented, applied to a substrate, as defined in EN 971-1 3.5 coating film film possessing protective, decorative and/or other specific properties on a substrate, as defined in EN 971-1 3.6 solid content non volatile portion of a coating material, as defined in EN 971-1 3.7 spray pattern visual pattern width of the coating deposit on a vertical panel 3.8 stroke speed velocity of spray pattern traverse across the face of the test sheet. This is equivalent to the velocity of travel of the atomiser relative to the test sheet. Either the atomiser or the test sheet can be moved 3.9 test rig structure for supporting the background panel and maintaining the atomiser - test sheet distance constant 3.10 test sheet flat sheet of aluminium foil to which coating material is applied for the determination of the transfer efficiency 3.11 test method 1 indirect method in which the mass of coating material delivered by the atomiser is determined from the fluid flow volume. It can be done by measurement with a fluid flow meter or by calculation from gravimetric measurement. The atomiser spray pattern is fully developed before it reaches the edge of the test sheet and is maintained constant over the test width 3.12 test method 2 direct method in which the mass of coating material delivered by the atomiser within the test sheet dimensions, is determined gravimetrically (by weighing). The atomiser is triggered on and off within the test sheet dimensions 3.13 transfer efficiency defined as the ratio of the mass of coating material solids deposited on an object to the mass of coating material solids atomised, expressed as a percentage 4 Principle of test The transfer efficiency of atomising and spraying equipment is determined by measuring directly or indirectly the mass of coating material solids delivered by the atomiser and the mass of dry coating material deposited on the test sheet. 5 Test procedure The test procedure defines the steps to be carried out in the determination and the conditions under which the test is conducted as well as the minimum reporting requirements. A transfer efficiency determination for a particular atomiser consists of at least three independent and consecutive tests of the transfer efficiency under the same conditions. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:39:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13966-1:2003 7 The atomiser transfer efficiency, under the prevailing conditions, is reported as the mean of the values obtained. If an individual test result differs from the mean value by more than +/- 1% the cause of the variation should be investigated and the determination repeated. Step Action Reference 1 Record details of atomising and spraying