SANS 895-2008 Gas cylinder trolleys《气瓶用手推车》.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 978-0-626-21767-9 SANS 895:2008Edition 2.1Any reference to SABS 895 is deemedto be a reference to this standard(Government Notice No. 1373 of 8 Nove

4、mber 2002)SOUTH AFRICAN NATIONAL STANDARD Gas cylinder trolleys Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag x191 Pretoria 0001 Tel: +27 12 428 7911 fax: +27 12 344 1568 www.sabs.co.za SABS SANS 895:2008 Edition 2.1 Table of changes Change No. Date Scope Amdt 1 2008

5、Amended to change the designation of SABS standards to SANS standards, and to update the definition of “acceptable” and referenced standards. Foreword This South African standard was approved by National Committee SABS TC 1048, Hospital equipment and supplies, in accordance with procedures of the SA

6、BS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in September 2008. This document supersedes SABS 895:1972 (first revision). A vertical line in the margin shows where the text has been technically modified by amendment No. 1. SANS 895:2008 Editi

7、on 2.1 1 Contents Page Foreword 1 Scope 3 2 Definitions 3 3 Requirements 3 4 Marking 6 5 Sampling and compliance with the specification 6 6 Inspection and methods of test . 7 6.1 Inspection 7 6.2 Methods of test 7 Figure 1 8 Appendix A Applicable standards 9 Appendix B Notes to purchasers 9 SANS 895

8、:2008 Edition 2.1 2 This page is intentionally left blank SANS 895:2008 Edition 2.1 3 Gas cylinder trolleys 1 Scope This specification covers dimensional and constructional requirements for gas cylinder trolleys used in hospitals for the conveyance of gas cylinders of water capacity 20 L. NOTE a) Th

9、e titles of standards referred to by number in the specification are given in appendix A. b) Requirements that must be specified by the purchaser are listed in appendix B. 2 Definitions 2.1 For the purposes of this specification the following definitions shall apply: acceptable acceptable to the aut

10、hority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 1 defective trolley that fails in one or more respects to comply with the requirements of the specification lot not more than 50 gas cylinder trolleys of the same construction, from one manufactu

11、rer, submitted at any one time for inspection and testing 3 Requirements 3.1 Materials 3.1.1 Mild steel tubes Mild steel tubes shall comply with the relevant requirements for grade 230 or grade 250 mild steel tubes in accordance with SANS 657-4. Amdt 1 3.1.2 Stainless steel Stainless steel shall be

12、18/8 (AISI Type 304) stainless steel or other acceptable austenitic stainless steel of weldable quality. SANS 895:2008 Edition 2.1 4 3.1.3 Mild steel sheets Mild steel sheets shall be of a good quality and shall be free from cracks, fins, laminations, and other defects. 3.1.4 Paint Paint shall be an

13、 enamel, or a system comprising a primer and an enamel. Amdt 1 3.1.5 Epoxy powder coatings Epoxy powder coatings shall be based on a compounded epoxy-resin that is suitable for application by a fluidized-bed process or an aerostatic spray process. 3.2 Welded joints The parts of all joints shall be c

14、lose fitting. 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 which it is joined. The welds shall be fusion welds or braze welds and shall be acceptable. Weld faces shall be smooth and clean, free from porosity,

15、 cavities, and trapped slag. The weld faces shall merge smoothly into the surface of the parent metal without overlap or undue under-cut. The weld metal, heat affected zone, and adjacent parent metal shall be free from cracks. Where welding is done from one side only, there shall be full penetration

16、 of the joint. The welds and the adjacent parent metal shall be smooth and free from flux, slag, and spatter before the finish is applied. 3.3 Design and dimensions The general design and overall dimensions shall be as shown in figure 1. 3.4 Frame The components of the frame shall be of mild steel o

17、r of stainless steel, as specified by the purchaser. The main frame diagonal braces and cross brace shall be of steel tubes of nominal outside diameter 25 mm and nominal wall thickness 1,60 mm. The main frame shall be one continuous length of tube bent to form the handle-bar and sides or shall consi

18、st of two tubes welded together in the middle of the handle-bar. It shall have two diagonal braces welded to the sides to support the base plate and to provide the socket or two swivel castors (see figure 1). A cross brace shall be welded to the diagonal braces near the castor socket ends, as shown

19、in figure 1. The tubes shall be free from wrinkles, and any flattening or reduction in diameter shall not exceed 4 % of the actual outside diameter of the tube. 3.5 Base plate The base plate shall be of mild steel or stainless steel (as relevant) of nominal thickness at least 6 mm attached to the bo

20、ttoms of the main frame and diagonal braces by fillet welds extending around the full circumference of the tubes (see figure 1). The trolley shall, when unloaded, be able to stand on its base plate on a level surface without tipping over. SANS 895:2008 Edition 2.1 5 3.6 Cylinder cradle The cylinder

21、shall be held in position on the trolley by two cradle brackets (of tube of nominal outside diameter 20 mm) that are provided with tight-fitting, steel cover straps. The cover straps shall be so pivoted at one end that they can be swung out of the way during loading and unloading. The cover straps s

22、hall each have an open slot at the free end to engage and lock on a 10 mm diameter thumb screw or wing nut that is so designed that it cannot be removed from its fitting. 3.7 Flowmeter rail Unless an alternative arrangement is specified by the purchaser, a steel tube of nominal outside diameter 20 m

23、m, or a steel rod of nominal diameter 10 mm, shall be welded to the main frame, in the position indicated in figure 1, to serve as a rail to which a flowmeter can be clamped. 3.8 Wheel axles The wheel axle shall be of 20 mm diameter steel rod and shall be welded to the main frame in a position such

24、that the wheels are lifted off the floor to a height of at least 5 mm when the trolley rests on the base plate. 3.9 Wheels and castors The trolley shall be fitted with two 150 mm diameter by 40 mm wide hard-rubber-tyred wheels with ball or roller bearings and two 75 mm diameter swivel castors comply

25、ing with the requirements of SANS 621. 3.10 Water bottle cradle If so specified by the purchaser, a cradle of 5 mm diameter mild steel rod shall be fitted or welded to the frame to hold a water bottle of capacity 1 L. 3.11 Finish 3.11.1 General All surfaces shall be smooth and free from sharp edges,

26、 buckles, dents, pits, deep scratches, crimp, and other defects. Mild steel surfaces shall have a smooth enamel finish or a powder coating finish of the colour specified by the purchaser. Stainless steel surfaces shall have a medium directional satin finish or a bright polished finish not inferior t

27、o that of the relevant reference samples held by the South African Bureau of Standards1). 3.11.2 Enamel finishes a) Thickness of film. When tested in accordance with 6.2.2, the thickness of the enamel film shall be at least 30 m and if a primer is used the thickness of the system shall be at least 6

28、0 m. b) Scratch resistance. The enamel film shall so withstand scratching with a 1 mm diameter hardened steel ball point under a load of 2 000 g, drawn across it at a constant speed of 30 mm per second, that, when examined under a lens giving seven magnifications, the scratch shows no jagged edges o

29、r exposure of the underlying metal. 1) Manufacturers may, on application to the South African Bureau of Standards, inspect the reference samples. SANS 895:2008 Edition 2.1 6 c) Corrosion resistance. When the enamelled parts are tested in accordance with 6.2.3, there shall be no visible defect and af

30、ter the paint has been stripped the underlying metal shall show no signs of corrosion. 3.11.3 Powder coatings A powder coating finish shall comply with the relevant requirements of SANS 778. 4 Marking 4.1 Marking The manufacturers name, trade name, or trademark shall be legibly and indelibly marked

31、on every trolley. 4.2 Method of marking The marking shall be embossed or stamped on the frame or shall be applied by means of an indelible transfer. The marking shall be at least 5 cm2in area. 5 Sampling and compliance with the specification2) 5.1 Sampling The following sampling procedure shall be a

32、pplied in determining whether a lot complies with the requirements of the specification. The samples so taken shall be deemed to represent the lot. 5.1.1 Sample for inspection From the lot take at random the number of trolleys shown in column 2 of table 1 relative to the appropriate lot size shown i

33、n column 1. 5.1.2 Sample for testing From the lot take at random the number of trolleys shown in column 3 of table 1 relative to the appropriate lot size shown in column 1. Table 1 1 2 3 Lot size Sample for inspection Sample for testing 1 8 All 1 9 15 9 1 16 25 12 1 26 40 14 2 41 50 17 2 2) This sec

34、tion 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 help in assessing the quality of the lot. It is also used as th

35、e procedure for adjudicating in cases of dispute. SANS 895:2008 Edition 2.1 7 5.2 Compliance with the specification The lot shall be deemed to comply with the requirements of the specification if after inspection and testing of the samples drawn in accordance with 5.1 no defective is found. 6 Inspec

36、tion and methods of test 6.1 Inspection Inspect the samples taken in accordance with 5.1.1 for compliance with the requirements of sections 3 and 4 that are not tested in terms of 6.2. 6.2 Methods of test 6.2.1 General Test the samples taken in accordance with 5.1.2 for compliance with the requireme

37、nts of 3.11. 6.2.2 Thickness of enamel film a) Apparatus3). A suitable magnetic flux type apparatus. b) Procedure Standardize the apparatus by laying a non-magnetic shim (of approximately the same thickness and shape as those of the paint film on the sample) on clean steel of the same thickness as a

38、nd of the identical shape to those of the sample. Then place the operating head of the apparatus on the film to be tested and read off the thickness. Repeat the reading at least three times at different places (four times in all) on the film surface and record the average of the readings. 6.2.3 Corr

39、osion resistance of enamel film Use the corrosion resistance test described in SANS 778. 3) Details of a type of apparatus suitable for this test may be obtained from the South African Bureau of Standards. Dimensions in millimetres 1 Flowmeter rail 4 Cradle bracket 2 Thumb screw or wing nut 5 Fillet

40、 welds all round tubes 3 Cover strap 6 Plan of base plate 7 Gas cylinder 8 Welded 9 Cross brace 8 SANS 895:2008 Edition 2.1 Figure 1 Gas cylinder trolleySANS 895:2008 Edition 2.1 9 Appendix A4) Applicable standards Reference is made to the latest issues of the following standards: SANS 621, Castors

41、for hospital equipment. SANS 657-4, Steel tubes for non-pressure purposes Part 4: Steel tubes of round, oval, square and rectangular section for furniture. Amdt 1 SANS 778, Patients trolleys. Appendix B Notes to purchasers The following requirements must be specified in tender invitations and in the

42、 order or contract: a) Whether the frame is to be of stainless steel or mild steel (see 3.4). b) The arrangement for attaching a flowmeter, if other than that specified (see 3.7). c) When relevant, that a water bottle cradle is required (see 3.10). d) When relevant, the colour of the finish (see 3.11.1). 4) The information in the appendices is additional to that in the specification and has been included purely for information and guidance. SABS