SANS 897-2008 Wheeled bed screens《有轮床筛》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21762-4 SANS 897:2008Edition 2.4Any reference to SABS 897 is deemed to be a reference to this standard (Government Notice No. 1373 of 8 No

4、vember 2002) SOUTH AFRICAN NATIONAL STANDARD Wheeled bed screens Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code +27 12 www.stansa.co.za Standards South Africa SANS 897:2008 Edition 2.4 Table of ch

5、anges Change No. Date Scope Amdt 1 1981 Two additional types of screen have been included, and the height of type A screens has been amended. Amdt 2 1991 Has been amended to change the requirement for castors. Amdt 3 2002 Has been amended to update the normative references and the definition of “acc

6、eptable“. Amdt 4 2008 Amended to change the designation of SABS standards to SANS standards, and to update referenced standards. Foreword This South African standard was approved by National Committee StanSA TC 5140.48, Hospital equipment and supplies, in accordance with procedures of Standards Sout

7、h Africa, in compliance with annex 3 of the WTO/TBT agreement. This document was published in July 2008. This document supersedes SABS 897:2002 (edition 2.3). A vertical line in the margin shows where the text has been technically modified by amendment No. 4. SANS 897:2008 Edition 2.4 1 Contents Pag

8、e Foreword 1 Scope . 3 2 Definitions . 3 3 Types . 3 4 Requirements 4 5 Marking . 6 6 Sampling and compliance with the specification 6 7 Inspection and methods of test. 7 7.1 Inspection. 7 7.2 Methods of test 7 Appendix A Applicable standards 11 Appendix B Notes to purchasers . 11 SANS 897:2008 Edit

9、ion 2.4 2 This page is intentionally left blank 3 SANS 897:2008Edition 2.4Wheeled bed screens 1 Scope 1.1 This specification covers the dimensional and constructional requirements for four types of bed screens for use in hospitals. Amdt 1 NOTE a) Unless the product is manufactured under the standard

10、ization mark scheme, assessment of compliance with the relevant requirements of 4.1 and 4.2 requires special agreement between supplier and purchaser. b) The titles of standards referred to by number in the specification are given in appendix A. c) Requirements that must be specified by the purchase

11、r are listed in appendix B. 2 Definitions 2.1 For the purposes of this specification the following definitions shall apply: acceptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 3 bright polished finish bright reflect

12、ive finish obtained by polishing the surface without complete obliteration of previously existing grinding marks or other surface texture defective bed screen that fails in one or more respects to comply with the requirements of the specification directional satin finish finish obtained by so grindi

13、ng the surface with fine abrasives (without subsequent polishing) as to leave a silky appearance, with the abrasive marks running in the same general direction lot not more than 50 wheeled bed screens of the same type and construction, from one manufacturer, submitted at any one time for inspection

14、and testing 3 Types 3.1 Wheeled bed screens shall be one of the following types: a) Type A. A three-panel folding screen mounted on six castors (see figure 1). SANS 897:2008 Edition 2.4 4 b) Type B. An overbed cantilever folding screen mounted on four castors (see figure 2). c) Type C. A four-panel

15、folding screen, mounted on eight castors (see figure 3). Amdt 1 d) Type D. A five-panel folding screen, mounted on ten castors (see figure 4). Amdt 1 4 Requirements 4.1 Materials 4.1.1 Mild steel tubes Mild steel tubes shall comply with the relevant requirements for grade 230 or grade 250 mild steel

16、 tubes in accordance with SANS 657-4. Amdt 3; amdt 4 4.1.2 Stainless steel tubes Stainless steel tubes shall be of 18/8 (AISI Type 304) stainless steel or other acceptable austenitic stainless steel of weldable quality. 4.1.3 Paint The paint shall be an enamel, or a system comprising a primer and an

17、 enamel. Amdt 3 4.1.4 Epoxy-powder coatings Epoxy-powder coatings shall be based on a compounded epoxy-resin suitable for application by a fluidised-bed process or an aerostatic spray process. 4.2 Castors The castors fitted to the screens shall be 75 mm in diameter and shall comply with the requirem

18、ents of SANS 1292. Amdt 2 4.3 Welded joints The parts of all permanent joints shall be close fitting and in correct alignment, and the whole joint shall be welded. Where the open end of one tube is joined to the side of another tube, the profile of the open end shall match the profile of the side to

19、 which it is clean joined. The welds shall be acceptable fusion welds or braze welds. Weld faces shall be smooth, clean and free from porosity, cavities, and trapped slag. The weld faces shall merge smoothly into the surface of the parent metal without overlap or undue undercut. The weld metal, heat

20、 affected zone, and adjacent parent metal shall be free from cracks. Where welding is done from one side only, there shall be full penetration of the joint. The welds and adjoining metal shall be smooth and free from flux, slag, and spatter. 4.4 Screens 4.4.1 General The screens shall be constructed

21、 of mild steel or stainless steel tubes, as specified by the purchaser, of nominal wall thickness 1,60 mm. Any flattening or reduction in diameter of the tubes during fabrication shall not exceed 4 % of the actual outside diameter of the tubes. The dimensions shall be as shown in the relevant one of

22、 figures 1 - 4, subject to the tolerance of 3 mm. When the completed screen is placed in the extended position on its castors on a horizontal flat surface, the vertical members shall be not more than 6 mm out of plumb and the horizontal members shall be not more than 6 mm out of level. SANS 897:2008

23、 Edition 2.4 5 4.4.2 Type A screens a) Frames. Each panel frame shall be constructed of tubes of nominal outside diameter at least 20 mm and shall be of rectangular shape with 90 bends of approximately 50 mm inside radius. Each outer frame shall have two castors mounted on the legs of a cross-member

24、 made of tubes of nominal outside diameter at least 25 mm. The cross-member shall be welded to the frame (at 90 to the plane of the frame) in the position shown in figure 1. The centre frame shall have two castors each mounted on a separate leg welded so as to be coplanar with the frame in the posit

25、ions shown in figure 1. The design shall allow the screen to be so folded that the three frames lie parallel to one another. b) Hinges. Each outer panel frame shall be joined to the centre panel frame by means of two steel tubular hinges 40 mm long and having an easy fit on the tubular members. The

26、hinges shall be kept in position on the frames by means of welded collars as illustrated in figure 1. 4.4.3 Type B screens a) Main panel frame. The main panel frame and legs shall be constructed of tubes of nominal outside diameter at least 25 mm, and the frame shall have four castors (mounted one o

27、n each leg). The outside radii of the 90 bends at the top of the rectangular main panel frame shall be equal and shall not exceed 100 mm. b) Cantilever panel frames. The cantilever panel frames shall be constructed of tubes of nominal outside diameter at least 15 mm. Each cantilever panel frame shal

28、l be in one piece and shall be so hinged to the main panel frame that the tops of the three frames move in the same plane. Each cantilever frame shall be capable of being so rotated (in either direction) round the vertical member of the main panel frame as to lie parallel to the main panel frame. c)

29、 Hinges. The hinges shall be constructed of steel tubes welded side to side and shall be of the length illustrated in figure 2. The hinge tubes shall be a snug fit on the frame tubes and shall be kept in position by means of welded collars. The desired friction between the hinges and the cantilever

30、frames shall be obtained by means of spring washers (controlled by an adjustable nut at the lower end of each hinge) or by other acceptable arrangement. 4.4.4 Type C screens a) Frames. The construction, size, and type of material used shall be the same as for type A screens, except that there shall

31、be two inner and two outer frames. The two inner frames shall each have two castors, each mounted on a separate leg welded so as to be coplanar with the frame in the positions shown in figure 3. The two castors of each outer frame shall be mounted on the legs of a cross-member welded to the frame at

32、 90 to the plane of the frame in the position shown in figure 3. The design shall allow the screen to be so folded that the four frames lie parallel to one another. Amdt 1 b) Hinges. Each outer frame shall be joined to the adjacent inner frame and each pair of inner frames shall be joined by means o

33、f two steel tubular hinges 40 mm long and having an easy fit on the tubular members. The hinges shall be kept in position on the frames by means of welded collars as illustrated in figure 3 and the detail in figure 1. Amdt 1 4.4.5 Type D screens a) Frames. The construction, size, and type of materia

34、l used shall be the same as for type A or type C screens except that there shall be three inner and two outer frames (see figure 4). Amdt 1 SANS 897:2008 Edition 2.4 6 b) Hinges. The requirements for the hinges of type D screens shall be the same as for type C screens. Amdt 1 4.5 Finish Exposed mild

35、 steel surfaces shall have a smooth enamel finish or an epoxy-powder coating finish (as specified by the purchaser) complying with the relevant requirements of SANS 778 and of the colour specified by the purchaser. Stainless steel surfaces shall have a medium directional satin finish or a bright pol

36、ished finish. The quality of the finish shall not be inferior to the finish on the relevant standard sample held by the South African Bureau of Standards1).5 Marking 5.1 Marking A frame of every screen shall be legibly and indelibly marked with the manufacturers name or trade name or trademark. 5.2

37、Method of marking The marking shall be embossed or stamped on the carrier or shall be applied by means of an indelible transfer. The marking shall in each case be at least 500 mm2in area. 6 Sampling and compliance with the specification2) 6.1 Sampling The following sampling procedure shall be applie

38、d in determining whether a lot complies with the requirements of the specification. The samples so taken shall be deemed to represent the lot. 6.1.1 Sample for inspection From the lot take at random the number of screens shown in column 2 of table 1 relative to the appropriate lot size shown in colu

39、mn 1. 6.1.2 Sample for testing After inspection of the sample taken in accordance with 6.1.1, take from it (when relevant, at random) the number of screens shown in column 3 relative to the appropriate lot size shown in column 1 of table 1. 1) Manufacturers may, on application to the South African B

40、ureau of Standards, inspect the standard samples. 2) This section applies to the sampling for inspection and testing before acceptance or rejection of single lots (consignments) in cases where no information about the implementation of quality control or testing during manufacture is available to he

41、lp in assessing the quality of the lot. It is also used as the procedure for adjudicating in cases of dispute. SANS 897:2008 Edition 2.4 7 Table 1 1 2 3 Lot size Sample for inspection Sample for testing 1 8 9 15 16 25 26 40 41 50 All 9 12 14 17 1 1 1 2 2 6.2 Compliance with the specification The lot

42、 shall be deemed to comply with all the requirements of the specification if after inspection and testing of the samples drawn in accordance with 6.1 no defective is found. 7 Inspection and methods of test 7.1 Inspection Inspect the samples taken in accordance with 6.1.1 for compliance with the requ

43、irements of sections 4 and 5 that are not tested in terms of 7.2 or assessed in terms of 1.1, Note (a). 7.2 Methods of test Test, in accordance with the relevant methods given in SANS 778, each unit in the sample taken in accordance with 6.1.2 for compliance with the requirements of 4.5. SANS 897:20

44、08 Edition 2.4 8 Dimensions in millimetres Figure 1 Type A screen SANS 897:2008 Edition 2.4 9 Dimensions in millimetres Figure 2 Type B screen SANS 897:2008 Edition 2.4 10 Dimensions in millimetres Amdt 1 Figure 3 Type C screen Dimensions in millimetres Amdt 1 Figure 4 Type D screen SANS 897:2008 Ed

45、ition 2.4 11 Appendix A3)Applicable standards Reference is made to the latest issues of the following standards: SANS 657-4, Steel tubes for non-pressure purposes Part 4: Steel tubes of round, oval, square and rectangular section for furniture. Amdt 4 SANS 778, Patients trolleys. SANS 1292 (SABS 129

46、2), Castors for furniture. Amdt 2 Appendix B Notes to purchasers The following requirements must be specified in tender invitations and in the order or contract: a) The type of screen required (see 3.1) b) Whether a mild steel or stainless steel screen is required (see 4.4.1) c) Whether an enamel or epoxy-powder coating finish is required (see 4.5) d) When relevant, the colour of the finish (see 4.5) 3) The information in the appendices is additional to that in the specification and has been included purely for information and guidance. Standards South Africa