1、BRITISH STANDARD CONFIRMED MARCH1989 BS3622:1975 Specification for General purpose stools and anaesthetists chairs for hospital use UDC 615.478.68:684.435BS3622:1975 This British Standard, having been approved by the Committeefor Tubular FramedEquipment for Hospitals,was published underthe authority
2、 of the Executive Board on 30 April1975 BSI08-1999 First published May1963 First revision August1970 Second revision April1975 The following BSI references relate to the work on this standard: Committee reference M/26 Draft for comment73/62394 DC ISBN 0 580 08591 0 Co-operating organizations The Com
3、mittee under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and professional, scientific and industrial organizations: British Rubber Manufacturers Association British Surgical Trades Association (Inc.) Department of Health
4、 and Social Security Department of the Environment Institute of Purchasing and Supply King Edwards Hospital Fund for London National Association of Hospital Supplies Officers Royal College of Midwives Royal College of Nursing and National Council of Nurses of theUnitedKingdom Royal College of Physic
5、ians of London Teaching Hospitals Association Amendments issued since publication Amd. No. Date of issue CommentsBS3622:1975 BSI 08-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Materials 1 4 Range and adjustment of seat height 1 5 Dimensio
6、ns and construction 1 6 Anti-static requirements 2 7 Finish 2 8 Marking 2 Appendix A Information to be given by the purchaser in enquiries and orders 3 Publications referred to Inside back coverBS3622:1975 ii BSI 08-1999 Foreword In this revision of this British Standard rational metric seat heights
7、 have been adopted. The standard is in line with other standards for tubular framed hospital equipment both as regards material and methods of construction. For anaesthetists use a chair is sometimes preferred to a stool and the standard includes requirements to enable the stool base to be built up
8、into a chair, but it was not thought necessary to specifically design the chair. The stools are used by surgeons and anaesthetists in operating theatres. Rubber feet, if fitted, should be anti-static, but all-metal feet may be supplied if the purchaser requires them. Information relating to the reco
9、mmended limits of electrical resistance and methods for testing of rubber furniture feet and pads is given in BS2050. In view of the known tendency for the electrical resistance of anti-static rubber to increase under service conditions, it is recommended that anti-static rubber feet and seat pads s
10、hould be tested at three-monthly intervals to ensure that the resistance complies with that stated in BS2050. It has been established that for long-term efficiency and economy, stainless steel tube should be used in the construction of these stools and chairs as the first cost is well offset by thes
11、e considerations. Attention is drawn to Appendix A which lists information to be given by the purchaser when asking for a quotation or placing an order. Certification Attention is drawn to the certification facilities described on the inside back cover of this standard. A British Standard does not p
12、urport 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 fron
13、t cover, pagesi andii, pages1 to4, 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.BS3622:1975 BSI 08-1999 1 1 Scope This British Standard spec
14、ifies the basic requirements relating to materials, dimensions and construction, electrical safety precautions, finish and marking for general purpose stools suitable for surgeons and anaesthetists use in hospitals. Additional safety requirements are given for the addition of a top to form a chair,
15、but the choice of design is left to the purchaser. Stools and chairs are available in two height ranges. 2 References The titles of the British Standards referred to in this standard are listed on the inside back cover. 3 Materials 3.1 The legs, braces and central tubes of the stool shall be of stai
16、nless steel tube which shall comply with the requirements specified for welded stainless steel tube grade1 in BS3014. 3.2 The screwed central rod and threaded bush shall be from steel220M07 of BS970-1, cold drawn. 3.3 The seat and support disc shall be made of stainless steel of a suitable grade com
17、plying with the requirements of BS1449-4, and the same requirements shall apply to anaesthetists chairs in so far as they are applicable. 4 Range and adjustment of seat height The seat of both stools and chairs shall be capable of being adjusted over one of the two following ranges: Range1: minimum4
18、50mm, maximum700mm above floor level. Range2: minimum650mm, maximum850mm above floor level. The height adjustment shall be obtained by revolving the seat. 5 Dimensions and construction 5.1 Seat for stools. The steel seat shall be circular and shall have an outside diameter over the flange of330 3mm.
19、 It shall be manufactured either by spinning or pressing from material having a minimum thickness of1.2mm before forming. The curved edge forming the junction between the seat surface and its flange shall have a radius of6mm. The seat flange shall be38 1.5mm deep. 5.2 Seat support. The steel seat sh
20、all be attached to the central rod by means of a flanged boss or by other positive means. 5.3 Central rod and threaded bush. The central rod and threaded bush shall be so designed that the seat requires from four to eight rotations to raise or lower it25mm. The overall diameter of the central rod sh
21、all be not less than25mm and the bush shall be threaded similarly to the rod. The effective length of engagement of the threads of the bush shall be not less than25mm. The design shall be such that complete rigidity and stability is maintained throughout the full range of adjustments. Means shall be
22、 provided to prevent the seat accidentally disengaging from the stand assembly after reaching its maximum height. 5.4 Concealment of the central rod. The screwed central rod shall be fully concealed at all elevations of the seat. 5.5 Central tube. The central tube shall have a minimum outside diamet
23、er of38mm and a minimum wall thickness of1.6mm. 5.6 Outer concealment tube. The outer concealment tube, where such is employed, shall have an inside diameter sufficient to accommodate the inner tube without contact and shall be not less than0.7mm in thickness. 5.7 Lubrication. Means shall be provide
24、d to facilitate lubrication of the threaded bush on the central screwed rod, unless a pre-packed or self-lubricating bearing bush is fitted. 5.8 Legs. The stool shall be provided with either three or four legs for range1 and four legs for range2, made of stainless steel tube not less than16mm outsid
25、e diameter and1.6mm thickness. The legs shall be spaced at equidistant intervals around the circumference, to meet the floor in a circle of450mm diameter formed by the inside face of the feet. When rubber feet are fitted, the lower end of each of the legs shall be adequately plugged to obviate any p
26、ossibility of the leg cutting through the rubber of the foot. When there are four legs, castors may be fitted. These shall be securely fixed and shall meet the anti-static and other requirements of BS2099-1. Castor wheels shall be of65mm diameter and of a type as ordered by the purchaser. The castor
27、 tyres shall be of a composition which does not permanently stain the floor. The maximum limit of resistance shall be10 4 7.BS3622:1975 2 BSI 08-1999 5.9 Bracing. The legs shall be suitably braced by stainless steel tubes of not less than12mm outside diameter and1.6mm thickness inserted between them
28、. The bracing tube shall be positioned on the legs so as to afford a foot rest, giving a minimum vertical clearance of130mm above the floor. The bracing shall be from leg to leg, securely fixed to each of the legs by welding. It shall not be cruciform i.e.brought to a central joint from each leg unl
29、ess this is additional to direct bracing. 5.10 Welding. Stainless steel tube shall be either oxy-acetylene welded, inert-gas arc welded or resistance welded. For oxy-acetylene welding the filler rod shall comply with type347S96 of BS1453, and for inert-gas metal arc welding or for inert-gas tunsten
30、arc welding it shall comply with BS2901-2: type347S96. Each joint in the stool shall be properly welded, and there shall be complete fusion of the metal. Welding shall be carried out in accordance with the requirements of the appropriate British Standard, e.g.BS3019-2, where applicable. 5.11 For cha
31、irs, the general requirements except those in5.1 shall apply; for chairs there shall always be four legs, and if so required by the purchaser, castors may be fitted in accordance with5.8. 6 Anti-static requirements 6.1 Feet. When rubber feet are fitted to the legs of the stool or chair they shall be
32、 the close fitting crutch pattern sleeve type made of anti-static rubber composition. The feet shall be clearly and indelibly marked with a yellow spot to indicate that they are anti-static. The colour used for this purpose shall be similar to No.355, “Lemon”, as specified in BS381C. The rubber slee
33、ve of the foot shall be not less than25mm long measured internally and the solid pad of the foot shall be not less than10mm thickness at the base. 6.2 Seat pad and cover for stools. The seat pad shall consist of a cellular foam interior complying with the material requirements of BS2891 which shall
34、be completely enclosed by and permanently sealed into a cover of anti-static rubber sheet of thickness not less than0.65mm. The foam rubber pad shall be330mm in diameter and neither less than25mm nor more than50mm in thickness. The rubber sheet shall extend not less than75mm to form a skirt which gr
35、ips over the seat flange. The all-in electrical resistance applied from the outside top of the seat cover to the underside of the rubber feet when tested to the requirements of BS2050 shall lie between the lower and upper limits of10 4 7 and10 6 7 respectively. Components shall not be tested separat
36、ely. The cover shall be clearly and indelibly marked with a colour similar to No.355, “Lemon”, as specified in BS381C, to indicate that it is anti-static and this marking shall include the words “anti-static”. Such of the foregoing requirements as are relevant shall apply to a chair. 7 Finish 7.1 Af
37、ter completion of the construction of the stool or chair, all welded joints shall be completely smoothed and finished similarly to the remainder of the stool. Sufficient welding material shall be applied to allow for subsequent dressing smooth all over without weakening the joint. There shall be no
38、sharp edges and no unsealed formation which may harbour dirt or foreign matter; any exposed ends of the tube shall either be plugged and welded over or shall be smoothly capped. 7.2 The finish including welds, shall be mirror polished to BS1449-4 finish No.8. 7.3 The surface of the whole article sha
39、ll be thorough cleaned and degreased. 8 Marking Stools or chairs complying with the requirements of this British Standard shall be clearly and indelibly marked with the following. a) The manufacturers name or other means of identification. b) The year of manufacture. c) The number of this British St
40、andard i.e.BS3622.BS3622:1975 BSI 08-1999 3 Appendix A Information to be given by the purchaser in enquiries and orders When making an enquiry or placing an order, the purchaser should supply the following information. A.1 Details of stool a) Height range, i.e.range1 or2. b) Whether three or four le
41、gs are required. c) Whether rubber feet or castors are required. A.2 Details of chair a) Height range. b) Whether rubber feet or castors are required. A.3 Whether chair is to have a) arms (adjustable or fixed), b) back (adjustable or fixed), c) padded or metal seat.4 blankBS3622:1975 BSI 08-1999 Pub
42、lications referred to This standard makes reference to the following British Standards: BS381C, Colours for specific purposes. BS970, Wrought steels in the form of blooms, billets, bars and forgings. BS970-1, Carbon and carbon manganese steels including free cutting steels. BS1449, Steel plate, shee
43、t and strip. BS1449-4, Stainless and heat resisting plate, sheet and strip. BS1453, Filler materials for gas welding. BS2050, Electrical resistance of conductive and anti-static products made from flexible polymeric material. BS2099, Castors. BS2099-1, Castors for hospital equipment for ward and the
44、atre use. BS2891, Operating table covers or pads of cellular rubber. BS2901, Filler rods and wires for gas-shielded arc welding. BS2901-2, Austenitic stainless steels. BS3014, “As welded” and cold drawn welded austenitic stainless steel tubes for mechanical, structural and general engineering purpos
45、es. BS3019, General recommendations for manual inert-gas tungsten-arc welding. BS3019-2, Austenitic stainless and heat-resisting steels. BSI Certification Trade Mark The Kitemark The Kitemark is the registered certification trade mark of the British Standards Institution. A licence to use the Kitema
46、rk on or in relation to a product will be granted to any manufacturer or producer who demonstrates that he can and will be able consistently to make that product to a specified British Standard. His capability of doing so is initially assessed by inspection of his production process, quality control
47、 organization and test facilities, and by independent testing of a sample of the product against all the criteria of the relevant standard. The licensee is required to accept, and to operate in accordance with, a BSI scheme of supervision and control which identifies the tests to be carried out duri
48、ng manufacture and on the completed product and specifies the frequency of such testing. BSI carries out unannounced inspection visits to the manufacturers works and audit testing of the product, and may withdraw the licence for any failure of the manufacturer to comply with the relevant standard or
49、 with the requirements of the scheme of supervision and control. The presence of the Kitemark on or in relation to a product is an assurance that the goods have been produced under a system of supervision, control and testing, operated during manufacture and including periodical inspection of the manufacturers works in accordance with the certification mark scheme of BSI. Further particulars of the terms of licence may be obtained from the Quality Assurance Department. British Standards Institution, Maylands Avenue, Hemel Hempstead, Herts. HP24SQ.BS3622:1975 BSI 389 C
