1、BRITISH STANDARD BS 1676:1970 Specification for Heaters for tar and bitumen (Mobile and transportable)BS 1676:1970 This British Standard, having been approved by the Road Engineering Industry Standards Committee, was published under the authority of the Executive Board on 26August 1970 BSI 06-1999 F
2、irst published August 1950 First revision February 1960 Second revision August 1970 The following BSI references relate to the work on this standard: Committee reference RDE/22 Draft for comment 68/31974 ISBN 580 06462 X Co-operating organizations The Road Engineering Industry Standards Committee, u
3、nder whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together wit
4、h the following, were directly represented on the committee entrusted with the preparation of this standard: Asphalt and Coated Macadam Equipment and Cranes Association* Institute of Petroleum* Association of Consulting Engineers Institute of Quarrying British Quarrying and Slag Federation* Institut
5、ion of Civil Engineers* British Tar Industry Association* Institution of Highway Engineers* British Tarpaviours Federation Institution of Municipal Engineers* Cement and Concrete Association Institution of Structural Engineers Concrete Society (Design and Ministry of Defence, Army Department* Develo
6、pment Divisional Committee) Ministry of Public Building and Works* Contractors Plant Association Ministry of Transport* County Surveyors Society* Ministry of Transport, Road Research Federation of Civil Engineering Laboratory* Contractors* Sand and Gravel Association of Great Federation of Manufactu
7、rers of Britain* Construction* Society of Chemical Industry* Chemical Industries Association Road Emulsion Association Ltd Greater London Council Road Surface Dressing Association Liquefied Petroleum Gas Industry Individual manufacturer Technical Committee Mastic Asphalt Council and Employers Federa
8、tion Amendments issued since publication Amd. No. Date CommentsBS1676:1970 BSI 06-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Classification and roadworthiness 1 4 Capacity 1 5 Construction 1 6 Instruments 2 7 Safety 2 8 Performance 2 9
9、Descriptive plate 2 Appendix A Information to be given with an enquiry or order 3BS 1676:1970 ii BSI 06-1999 Foreword This standard makes reference to the following British Standards: BS 21, Pipe threads. BS 76, Tars for road purposes. BS 3690, Bitumens for road purposes. This British Standard, firs
10、t published in1950, has been prepared under the authority of the Road Engineering Industry Standards Committee, in the light of subsequent developments. It does not apply to heaters designed primarily for static installations or to those for heating other materials, e.g., mastic asphalt. The standar
11、d has been prepared using metric dimensions as part of the national policy to change to the metric system. The standard provides guidance for manufacturers and users on important features and details of performance and construction, and aims to facilitate economical manufacture and maintenance by li
12、miting to twelve the number of sizes specified as standard. Small sizes are now based on the use of200 litre drums. Guidance on the information to be supplied with an enquiry or order is given at Appendix A. NOTEAttention is drawn to certification facilities offered by BSI; see the back cover of thi
13、s standard. 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 documen
14、t comprises a front cover, an inside front cover, pages i and ii, pages1to 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.BS1676:1970 BSI 0
15、6-1999 1 1 Scope This British Standard classifies, and specifies requirements for mobile and transportable heaters for tar and bitumen for use in road engineering and general construction work. The standard gives requirements for roadworthiness, capacity, construction, safety, performance and certif
16、ication, and for the fitting of instruments and marking plate; it also makes provision for possible special requirements by the purchaser. 2 Definitions For the purposes of this British Standard the following definitions apply: 2.1 binder tar, bitumen, or a tar/bitumen mixture 2.2 heater a tank or c
17、ontainer for binder equipped with means for heating the contents by solid fuel or oil burners NOTELiquefied petroleum gases are being used as fuel, but until a standard for gas burning equipment has been issued, it is not possible to list detailed requirements in this standard. 3 Classification and
18、roadworthiness 3.1 Classification. This standard applies to heaters of the following types for use in road engineering and general construction work. 1) Mobile heaters, which may be either trailers or self-propelled vehicles, capable of travelling considerable distances on roads at speeds up to the
19、statutory limits. 2) Transportable heaters, which are intended only for travelling short distances at low speeds and would normally be carried to any distant site on another vehicle. 3.2 Roadworthiness. Each type shall comply with all relevant British Road Traffic Regulations. 4 Capacity The followi
20、ng shall be the standard nominal capacities for heaters: NOTEHeaters of other nominal capacities may be supplied at the request of the purchaser The internal volume shall be not less than10% greater than the nominal capacity to allow for frothing and expansion. 5 Construction All materials and compo
21、nents shall comply with the appropriate British Standards and shall, where applicable, have BS threads to BS 21 1)to permit standard pipework or hoses to be attached. All heaters shall be fitted with a draw-off cock. If the draw-off cock is not at the lowest part of the tank, a sludge cock shall als
22、o be provided to enable the tank to be drained. The covers of heaters shall be so arranged as to prevent entry of rain. Each charging hole shall have a lid which, when closed, will prevent the entry of rain. The lid may be hinged or removable, but shall be fitted with a device enabling it to be kept
23、 in position when closed. If required by the purchaser, tanks of2500 litres or greater capacity shall be provided with a pipe connection to enable the binder to be pumped in without the need for lifting the lid. The chimney or flue shall be fitted with a damper. If a chimney is provided, it shall be
24、 hinged or readily detachable so that it can be lowered for travelling, and a suitable cradle-rest shall be provided to support it in this position. On heaters which are intended to be charged from barrels: 1) Barrel rests shall be provided. 2) If specified by the purchaser, a means of raising the b
25、arrels or drums shall be provided (see Clause7). This shall be so designed that it can be secured in the raised position, and so that the heater is stable under all normal working conditions. Heaters of5000 litres or greater capacity shall, if required by the purchaser, be fitted with a ladder to gi
26、ve access to the top of the heater. If specified by the purchaser, a device for agitating the binder in the heater shall be provided. If the purchaser requires a heater to be lagged, the lagging shall be protected and kept in position by suitable lagging plates, or an equivalent to ensure that it do
27、es not deteriorate in the use or become impregnated with binder. If required by the purchaser, the manufacturer shall state the rate of heat loss under agreed conditions. 50 litres 1500 litres 100 litres 2500 litres 200 litres 3500 litres 400 litres 5000 litres 600 litres 7500 litres 1000 litres 100
28、00 litres 1) BS 21, “Pipe threads”BS 1676:1970 2 BSI 06-1999 6 Instruments All heaters of1000 litres or greater capacity shall be fitted with thermometers accurate to within 3degC which indicates the temperature of the binder and so positioned that it will record when the binder is at minimum capaci
29、ty for reheat. If required by the purchaser, a suitable indicator of the volume of the contents shall be provided. 7 Safety The distance between any opening used for charging and the mouth of the chimney or the burner opening shall be at least625mm. If the size of the machine or design consideration
30、s make this impracticable, effective alternative precautions shall be taken to prevent fire resulting from spilt, overflowing, frothing or fuming binder. Suitable fire extinguisher equipment shall be provided on each heater. When oil fuel tanks are provided: 1) They shall be so positioned as to allo
31、w at least50mm free air space between the heater and the fuel tanks. 2) Fuel filling openings shall be so located as to minimise the risk of fire resulting from spilling, or of fuel entering the heater. On closed heaters an air vent shall be provided. All combustion and lifting devices shall comply
32、with relevant British Board of Trade Regulations. 8 Performance All heaters shall be capable of passing the following test: When the heater is filled with the nominal capacity either of tar having an EVT of34C according to BS76 2) , or cut back bitumen with a flow time of50seconds at40C in a standar
33、d tar viscometer in accordance with BS3690 3) , the heating arrangements shall be capable of raising the temperature of this volume of binder under normal operating conditions from30C to115C in not more than2 hours. 9 Descriptive plate Each heater shall have affixed to it a plate giving the followin
34、g particulars: 1) Manufacturers name. 2) Type identification and serial number. 3) Year of manufacture. 4) Nominal capacity. 5) Minimum capacity for reheat. 6) Unladen weight. 7) The number of this British Standard, i.e.BS1676:1970. 2) BS 76, “Tar for road purposes” 3) BS 3690, “Bitumen for road pur
35、poses”.BS1676:1970 BSI 06-1999 3 Appendix A Information to be given with an enquiry or order The following information shall be given: 1) Whether mobile or transportable (Clause3). 2) Nominal capacity (Clause4). 3) Whether barrel rests and/or a hoist are required (Clause5). 4) Whether a ladder is re
36、quired (Clause5). 5) Whether a device for agitating the binder is required (Clause5). 6) Whether lagging is required (Clause5). 7) Whether heat loss should be stated (Clause5). 8) Whether the individual machine is to be tested (Clause8). 9) Fuel to be used.4 blankBS1676:1970 BSI 06-1999 British Stan
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