BS 2718-1979 Specification for gas cylinder trolleys《气瓶小推车规范》.pdf

1、BRITISH STANDARD BS 2718:1979 Specification for Gas cylinder trolleys UDC 615.478.35:616089.57:621.642.02BS2718:1979 This British Standard, having been prepared under the direction of the Surgical Instruments and Medical Equipment Standards Committee, was published under the authority of the Executi

2、ve Board and comes into effect on 31 December1979 BSI 07-1999 First published June 1956 First revision January 1967 Second revision December 1979 The following BSI references relate to the work on this standard : Committee reference SGS/33 Draft for comment 78/61970 DC ISBN 0 580 11078 8 Cooperating

3、 organizations The Surgical Instruments and Medical Equipment Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government departments and professional and industrial organizations: Association of Anaesthetists of Great Brit

4、ain and Ireland* Association of British Sterilizer Manufacturers Association of National Health Supplies Officers British Anaesthetic and Respiratory Equipment Manufacturers Association British Institute of Surgical Technologists British Medical Association* British Paediatrics Association British S

5、urgical Trades Association Incorporated* Department of Health and Social Security* Disposable Hypodermic and Allied Equipment Manufacturers Association Institute of Purchasing and Supply Medical Defence Union Medical and Dental Defence Union of Scotland Medical Protection Society Medical Sterile Pro

6、ducts Association Ministry of Agriculture, Fisheries and Food Ministry of Defence Royal College of Midwives* Royal College of Obstetricians and Gynaecologists Royal College of Surgeons of Edinburgh Royal College of Veterinary Surgeons Royal Institute of Public Health and Hygiene Scientific Instrumen

7、t Manufacturers 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: British Rubber Manufacturers Association Castor Manufacturers (UK) Association Cat

8、ering Equipment Manufacturers Association Department of the Environment (PSA) National Association of Theatre Nurses National Health Services Royal College of Nursing and National Council for Nurses of the UK Royal College of Physicians of London Amendments issued since publication Amd. No. Date of

9、issue CommentsBS2718:1979 BSI 07-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 General requirements for materials and construction 1 4 Antistatic requirements 1 5 Overall heights 1 6 Wheels 1 7 Buffers 1 8 Buffering 1 9 Finish 2 10 Marking 2

10、 Appendix A Requirements and test methods for enamel and plastics coating finishes 3 Figure 1 Typical gas cylinder trolley 4 Publications referred to Inside back coverBS2718:1979 ii BSI 07-1999 Foreword BS2718 was first published in1956 and the first revision was in January1967. In this second revis

11、ion of BS2718 the dimensions specified have been metricated to suit the metric capacities of the three sizes of steel cylinder normally used. As a precaution against risk arising from the discharge of static electricity, all rubber on the trolleys is still required to be antistatic. A new requiremen

12、t has been included to provide for buffering of the trolleys which, it is hoped, will reduce the risk of damage to the fabric of hospital buildings. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct

13、 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, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright

14、 date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS2718:1979 BSI 07-1999 1 1 Scope This British Standard specifies the materials, the dimensions, and the constructional and performance requirements for gas cylinder trolleys in th

15、ree sizes to take steel cylinders of1360litre,3400 litre and6 800 litre capacity. The dimensions are based on cylinders for oxygen or for compressed air and other medical gases. A typical gas cylinder trolley is shown inFigure 1. 2 References The titles of the publications referred to in this standa

16、rd are listed on the inside back cover. 3 General requirements for materials and construction 3.1 Trolleys shall be so designed that, when loaded and the handle is at a convenient height for pushing, the centre of gravity lies vertically above the axles. 3.2 If welded steel tube is used for the fram

17、ework, it shall comply with the requirements of grade11 finish semi-bright as specified in section 2 ofBS1775:1964. The tube shall be20mm minimum diameter for the1360 litre size and25mm minimum diameter for the3400 litre and6 800 litre sizes. Steel plate shall comply with the requirements of BS1449-

18、1, grade CR for semi-bright finish. 3.3 All joints in the framework shall be welded. Welding shall comply with the requirements of BS693 or BS5135, as applicable, and it shall be neatly executed. There shall be no sharp edges, or crevices that may harbour dirt or foreign matter. 3.4 The main framewo

19、rk shall comprise a tube bent to the required shape and welded to a base plate in front, the assembly being mounted on two wheels. Support for the cylinder shall be provided near the top and the bottom of the trolley by U-shaped stays welded to the uprights. The framework shall be rigidly supported

20、on the axle. The upper portion of the framework of the6 800 litre trolley shall be strengthened by a transverse tie bar across the handle portion. The thickness of the base plate shall be3mm on the1360 litre size and5mm for the3400 litre and6 800 litre sizes of trolley. The cylinder shall rest in th

21、e U-shaped stays on buffers. There shall be adequate clearance between the cylinder and support stays to facilitate withdrawal of the cylinder. 3.5 Fixing straps of steel or stainless steel25mm by6mm nominal section shall be provided to retain the cylinder in the trolley, each strap being pivoted at

22、 one end and secured by a captive locking device at the other. The attachment studs shall be10mm diameter for all sizes of cylinder. There shall be no easily detachable fittings. 4 Antistatic requirements 4.1 The trolley shall be so constructed that there is permanent conductivity between the trolle

23、y, cylinder and floor at all times. 4.2 The tyres shall be of an antistatic composition that will not permanently stain the floor. The maximum limit of electrical resistance shall be10M7 when tested in accordance with BS 2050. 4.3 The wheels and tyres shall be clearly marked with yellow, similar to1

24、0E 53, as specified in BS4800, to indicate that they are antistatic. 5 Overall heights The overall heights of the trolleys shall be not less than850mm nor more than1 150mm. 6 Wheels 6.1 The wheels for the smallest trolley shall be a minimum of100mm diameter with a width of tyre not less than19mm and

25、, for the two larger sizes,225mm minimum diameter with a width of tyre not less than25mm. The ends of the axle shall be guarded to minimize the risk of possible damage to the building fabric. 6.2 All wheel bearings shall be self-lubricating. 6.3 When loaded with a full cylinder of maximum size, the

26、axle shall be of sufficient strength to support the weight of the trolley and be capable of withstanding a vertical drop of100mm without permanent deformation. 6.4 The axles shall be so placed that, when the trolley is at rest, the wheels are raised not less than1mm nor more than3mm off the floor. 7

27、 Buffers Each cylinder support shall be fitted with at least two anti-static buffers to prevent the cylinder from rattling. 8 Buffering Energy-absorbing buffering shall be fitted to the trolley in order to protect the fabric of the building from damage by the leading edge of the base plate. SeeFigur

28、e 1 and BS4322.BS2718:1979 2 BSI 07-1999 9 Finish 9.1 Steel. Steel shall be finished with either enamel or plastics coating which shall be applied strictly in accordance with the manufacturers instructions. The finish shall present a smooth surface, it shall be non-toxic and shall comply with the re

29、quirements listed inAppendix A. 9.2 Stainless steel. The finish of stainless steel shall be in accordance with finish number4 in Table 1 ofBS1449-2:1975. 10 Marking 10.1 Trolleys shall be marked on an upright of the framework with the number of this British Standard, i.e. BS2718, and with the manufa

30、cturers name or identification mark. 10.2 Requirements for the marking of wheels are given in4.3. 10.3 Trolleys shall be clearly and indelibly marked on the top fixing strap with the size of cylinder for which it has been designed.BS2718:1979 BSI 07-1999 3 Appendix A Requirements and test methods fo

31、r enamel and plastics coating finishes Test Method/Specification Requirement 1. Bend test BS 3900-E1 No cracks or loss of adhesion visible to the naked eye 2. Scratch resistance BS 3900-E2 200 g load No bare metal visible 3. Impact resistance BS 3900-E3 Indent to 3 mm No loss of adhesion 4. Cupping

32、test BS 3900-E4 Indent to 3 mm on paint and obverse side No loss of adhesion or major cracksBS2718:1979 4 BSI 07-1999 Figure 1 Typical gas cylinder trolleyBS2718:1979 BSI 07-1999 Publications referred to BS 693, General requirements for oxy-acetylene welding of mild steel. BS 1449, Steel plate, shee

33、t and strip. BS 1449-1, Carbon steel plate, sheet and strip. BS 1449-2, Stainless and heat resisting steel plate, sheet and strip. BS 1775, Steel tubes for mechanical, structural and general engineering purposes. BS 2050, Electrical resistance of conductive and anti-static rubber products made from

34、flexible polymeric material. BS 3900, Method of test for paints. BS 3900-E1, Bend test (cylindrical mandrel). BS 3900-E2, Scratch test. BS 3900-E3, Impact (falling weight) resistance. BS 4322, Recommendations for buffering on hospital vehicles such as trolleys. BS 4800, Paint colours for building pu

35、rposes. BS 5135, Metal arc welding of carbon and carbon manganese steels. BS 2718:1979 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the in

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