BS-1764-1973.pdf

BRITISH STANDARD BS 1764:1973 Specification for Nominal diameters of round built-up tins UDC 621.798.144 181.1 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 This British Standard, having been approved by the Packaging Standards Committee, was published under the authority of the Executive Board on 3 December 1973 © BSI 11-1999 First published July 1951 First revision December 1973 The following BSI references relate to the work on this standard: Committee reference P/125 Draft for comment 70/18776 ISBN 0 580 07888 4 Co-operating organizations The Packaging Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Association of Steel Drum Manufacturers* British Paper and Board Makers Association British Paper Bag Federation British Paper Box Federation British Plastics Federation British Tin Box Manufacturers Federation* Chemical Industries Association* Collapsible Tube Manufacturers Association Confederation of British Industry Crown Agents for Oversea Governments and Administrations Department of the Environment Department of Trade and Industry Envelope Makers and Manufacturing Stationers Association Fibreboard Packing Case Manufacturers Association Food Manufacturers Federation (Incorporated) Glass Manufacturers Federation Institute of Packaging Institute of Trading Standards Administration Institution of Production Engineers Ministry of Defence/Procurement Executive* Oil Companies Materials Association* Packaging Films Manufacturers Association Paintmakers Association of Great Britain Ltd* PIRA (Research Association for the Paper and Board, Printing and Packaging Industries) Soap and Detergent Industry Association Society of Motor Manufacturers and Traders Ltd Timber Packaging and Pallet Confederation Technical Section of the British Paper and Board Makers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Aluminium Federation British Railways Board British Steel Industry Ministry of Agriculture, Fisheries and Food Ministry of Defence (Air Force Department) Ministry of Defence (Army Department) Paint Manufacturers and Allied Trades Association Post Office Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 © BSI 11-1999i Contents Page Co-operating organizationsInside front cover Forewordii 1Scope1 2Definitions1 3Range of nominal diameters and centre block diameters1 4End countersink2 Figure 1 Measurement of nominal diameter1 Figure 2 Measurement of end countersink3 Table 1 Range of nominal diameters and centre block diameters2 Publication referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 ii © BSI 11-1999 Foreword The standardization of the diameter of a built-up tin entails, as a pre-requisite, the standardization of the end centre block, i.e. the part of the press tool which determines the countersink diameter of the end. In the 1951 edition of this standard the ultimate objective was stated as being to standardize the precise diameters of ends, but this was not at that time considered to be practical until the demand for tins could be restricted to a limited number of nominal diameters. The demand is now restricted, and in this edition centre block sizes for each nominal diameter are specified. In addition, all dimensions are now quoted in metric units. It is emphasised that this British Standard is not intended to apply to “open top” cans for thermally processed foodstuffs. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 © BSI 11-19991 1 Scope This British Standard specifies a range of nominal diameters and related centre block diameters, together with depths of end countersink, of round built-up tins. It does not apply to cans for thermally processed food stuffs. NOTEThe title of the British Standard referred to in this standard is given on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions apply: 2.1 built-up tin a tin with the body made up of at least two (but often more) components, the side wall being formed by shaping and joining the edges 2.2 centre block diameter the diameter of that part of the press tool which determines the countersink diameter of the tin end NOTEThe term “centre block diameter” is used throughout this standard, but the term “punch plug diameter” is also used in the industry. These two terms are synonymous. 2.3 nominal diameter the countersink diameter rounded up to the nearest whole millimetre 3 Range of nominal diameters and centre block diameters The range of nominal diameters and centre block diameters shall be as shown in Table 1. The nominal diameter shall be measured as shown in Figure 1, avoiding the side seam position. NOTEThe nominal diameter is the diameter D measured as shown in Figure 1, rounded up to the nearest whole millimetre. Figure 1 Measurement of nominal diameter Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 2 © BSI 11-1999 Table 1 Range of nominal diameters and centre block diameters 4 End countersink The end countersink of round tins, when measured as shown in Figure 2, avoiding the side seam position, shall be as follows: Nominal diameterCentre block diameter mmmm 45 52a 59 62 66 69a 73 74a 84a 89 93a 99 105a 113 127a 138 154a 176 190 203 219 232 241 255 278 44.45 51.99 58.85 61.70 65.05 68.25 72.57 73.76 83.13 88.27 92.84 98.75 104.95 112.78 126.26 137.46 153.09 175.56 189.23 202.46 218.26 231.14 240.03 254.25 277.50 NOTETins having a nominal diameter of 278 mm and a nominal capacity of 25 litres are manufactured. These tins correspond with drums of similar capacity specified as Class 7 in BS 814. Definition of diameter between BS 814 and this standard differs. Traditionally, drum manufacturers specify the internal diameter of the body of a drum while tin box manufacturers specify the centre block diameter of the end component of a tin. The 25 litre Class 7 drum specified in BS 814 has an internal body diameter of 279.4 ± 1 mm, while the corresponding tin diameter is that of the centre block specified as having a diameter of 277.50 mm. a Internationally agreed sizes All diameters up to and including 203 mm not greater than4 mm 219 mm and 232 mm diameter not greater than5 mm 241 mm and 255 mm diameter not greater than6 mm 278 mm diameternot greater than 13 mm Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 © BSI 11-19993 Figure 2 Measurement of end countersink Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 07:56:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1764:1973 © BSI 11-1999 Publication referred to This standard makes reference to the following British Standard: BS 814, Mild steel and tinplate drums (light duty fixed ends). 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