BS 5388-1976 Specification for spray taps《喷头规范》.pdf

1、BRITISH STANDARD BS 5388:1976 Specification for Spray taps UDC 621.646.6:628.156:696.117BS5388:1976 This British Standard, having been prepared under the directionof the Sanitary Appliances Standards Committee,was published underthe authority of the Executive Board on 30September1976 BSI 12-1999 The

2、 following BSI references relate to the work on this standard: Committee reference SAB/2 Draft for comment 74/0492 DC ISBN 0 580 09186 4 Cooperating organizations The Sanitary Appliances Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from

3、 the following Government departments and scientific and industrial organizations: British Bath Manufacturers Association* British Plastics Federation* Council of British Ceramic Sanitaryware Manufacturers* Department of the Environment* Environmental Health Officers Association Greater London Counc

4、il* Institute of Plumbing* Institution of Heating and Ventilating Engineers* Institution of Municipal Engineers* Institution of Public Health Engineers Metal Sink Manufacturers Association Ministry of Defence National Brassfoundry Association* National Federation of Builders and Plumbers Merchants*

5、National Water Council* Royal Institute of British Architects Royal Institute of Public Health and Hygiene Royal Society of Health* Water Companies Association* The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the followin

6、g, were directly represented on the committee entrusted with the preparation of this British Standard: Association of Manufacturers of Domestic Electrical Appliances British Gas Corporation British Non-Ferrous Metals Technology Centre British Valve Manufacturers Association Copper Ball Manufacturers

7、 Association Copper Development Association Copper Tube Fittings Manufacturers Association Department of the Environment (Building Research Establishment) Department of Prices and Consumer Protection Heating and Ventilating Contractors Association Institute of British Foundrymen Institute of Gas Eng

8、ineers Institution of Production Engineers Institution of Water Engineers and Scientists National Association of Plumbing, Heating and Mechanical Services Contractors Society of British Gas Industries South London Consortium Thames Water Authority Metropolitan Water Division Individual experts Amend

9、ments issued since publication Amd. No. Date of issue CommentsBS5388:1976 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 References 1 3 Definitions 1 4 Nominal size 1 5 Marking 1 Section 2. Dimensions, design and construction 6 Gen

10、eral 1 7 Dimensions 1 8 Materials 1 9 Spray outlet 2 10 Flow restrictor 2 Section 3. Testing 11 General 3 12 Rate of flow test 3 13 Test for divergence of the spray 3 Appendix A Information to be supplied by the purchaser 6 Appendix B Method of measuring the rate of flow through spray taps fitted wi

11、th a fixed flow restrictor 6 Appendix C Method of measuring the rate of flow through spray taps fitted with an adjustable or self adjusting flow restrictor 6 Appendix D Method of measuring the divergence of the spray 7 Appendix E Design considerations for wash basins and troughs fitted with spray ta

12、ps 7 Appendix F Notes on the installation of spray taps 7 Figure 1 Installation and dimensional features of pillar spray taps 2 Figure 2 Installation and dimensional features of bib spray taps 2 Figure 3 Diagram of rate of flow test apparatus 3 Figure 4 Details of pressure take-off tee 4 Figure 5 Se

13、ctional diagram of spray, spray outlet and annular gauge 5 Table 1 Working pressure ranges and test pressures for fixed flow restrictors 2 Table 2 Dimensions of pressure take-off tee 4 Publications referred to Inside back coverBS5388:1976 ii BSI 12-1999 Foreword This British Standard has been prepar

14、ed under the authority of the Sanitary Appliances Standards Committee and at the request of the Department of the Environment and The Building Research Establishment. Spray taps provide a quick, hygienic method of washing under running water. The use of spray taps appreciably reduces the total amoun

15、t of water used for handwashing. Spray “mixing” taps, which incorporate a mixing function operated by the user, are not specified in this standard, but it is intended to prepare a separate British Standard dealing with them. They possess characteristics similar to those of spray taps but they are al

16、so able to accept hot and cold water supplies and mix them for delivery at a temperature to suit the user. The factors governing the use of spray taps, and their associated plumbing systems, are numerous. Pending the inclusion of a statement on design considerations in the relevant British Standard

17、codes of practice, and the issue of British Standard specifications for special wash basins and troughs for spray taps,Appendix E andAppendix F to this present standard set out some basic considerations. A British Standard does not purport to include all the necessary provisions of a contract. Users

18、 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 front cover, pages i and ii, pages1 to 8, an inside back cover and a ba

19、ck 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.BS5388:1976 BSI 12-1999 1 Section 1. General 1 Scope This British Standard specifies requirements for the materials, design,

20、 construction, dimensions and testing of two forms of spray taps: pillar spray taps and bib spray taps. 2 References The titles of the publications referred to in this standard are listed on the inside back cover. 3 Definitions For the purposes of this British Standard the following definitions appl

21、y. Reference should be made to BS4118, (from which definitions 3.1 and3.2 are taken) for other definitions. 3.1 spray tap a tap supplied with water at a predetermined temperature which it delivers, at a restricted rate of flow, in the form of a spray NOTEA bib spray tap is supplied with water throug

22、h a horizontal inlet and a pillar spray tap is supplied with water through a vertical inlet. 3.2 dead-leg a length of hot water pipe leading to a draw-off point and not forming part of a circuit 3.3 flow restrictor that component of a spray tap, not being the spray outlet, which governs or restricts

23、 the rate of discharge 3.4 spray outlet a fitting that is attached to the outlet of a tap and causes water passing through it to break up into a spray 3.5 tap platform a flat horizontal part of a wash basin provided for the mounting of a tap 4 Nominal size The nominal size of spray taps with both ri

24、sing and non-rising spindles shall be “ nominal size. 5 Marking 5.1 Spray taps. Spray taps shall be legibly and permanently marked with the following information: a) the manufacturers name or mark; b) the number of this British Standard, i.e.BS5388. Additional markings are not precluded (e.g.BS1010-

25、1 or BS1010-2 or performance standards, when published (seeclause 6). 5.2 Non-adjustable flow restrictors. Non-adjustable flow restrictors shall be legibly marked with the flow restrictor number (seeTable 1). Section 2. Dimensions, design and construction 6 General The design and construction of spr

26、ay taps shall be as specified in BS1010-1 or BS1010-2 or in BS5412, BS5413-1 and BS5413-3 (in course of preparation) except for those features specified in section2 of this standard. 7 Dimensions 7.1 Pillar spray taps. Pillar spray taps shall have the dimensional features shown inFigure 1. 7.2 Bib s

27、pray taps. Bib spray taps shall have the dimensional features shown inFigure 2. 8 Materials 8.1 General. Component parts of spray taps, other than those specified in8.2 and8.3, shall be made of any of the materials specified in BS1010-2 for comparable parts. The materials used in the construction of

28、 spray taps and which are in contact with the supply water shall not constitute a toxic hazard and shall not foster microbiological growth or give rise to taste, odour, cloudiness or discoloration of the water. Attention is drawn to National Water Council requirements in this respect. 8.2 Spray outl

29、ets. Spray outlets shall be made of one or more of the following materials: a) one of the non-ferrous metals specified in BS1010-2; b) stainless steel as specified in BS970-4, grades302S25, 304S15, 303S21; c) acetal, polypropylene, high density polyethylene, acrylonitrile butadiene styrene (ABS), po

30、lytetrafluoroethylene (PTFE) or not less suitable material.BS5388:1976 2 BSI 12-1999 8.3 Flow restrictors. Flow restrictors shall be made of one of the materials, or a combination of the materials, specified in a) and b) of8.2, or of rubber as specified in clause6 of BS3457:1973. 9 Spray outlet The

31、spray tap shall be provided with a spray outlet capable of causing the water to assume the shape of a diverging spray. The cone shall not diverge to an extent greater than that shown inFigure 5 when the tap is fully opened. Every waterway in the outlet shall be capable of accepting a1mm nominal diam

32、eter steel probe and the steel shall comply with the requirements of BS1407. The spray outlet device shall be capable of being removed for cleaning but only by the use of a special tool. 10 Flow restrictor A flow restrictor shall be provided in the spray tap. The flow restrictor may be either adjust

33、able or one of the three fixed flow types, the pressure limits for which are specified inTable 1. Self adjusting flow restrictors may also be used provided that not more than two patterns are required to satisfy the requirements of12.2 over the whole range of working pressures set out inTable 1. The

34、 flow restrictor shall be in a form so that it can be adjusted or changed without removing the tap from the wash basin, but cannot be so adjusted without the use of a special tool. Table 1 Working pressure ranges and test pressures for fixed flow restrictors BS flow restrictor number Working pressur

35、e range Test flow pressure min. max. bar a bar 1 0.27 0.60 0.40 2 0.60 1.35 0.90 3 1.35 3.00 2.00 a 1 bar = 10 5N/m 2= 100 kPa. NOTE 1Drawing is diagrammatic only. NOTE 2Dimensions in “box” are given for guidance only. Figure 1 Installation and dimensional features of pillar spray taps NOTE 1Drawing

36、 is diagrammatic only. NOTE 2Dimensions in “box” are given for guidance only. Figure 2 Installation and dimensional features of bib spray tapsBS5388:1976 BSI 12-1999 3 Section 3. Testing 11 General Spray taps shall be capable of passing the tests specified in1.7.1 of BS1010-2:1973. In addition they

37、shall be capable of meeting the test requirements specified in section3 of this standard. 12 Rate of flow test 12.1 Spray taps with fixed flow restrictors. When tested by the method specified inAppendix B, spray taps with fixed flow restrictors shall deliver water at a rate of not less than0.03litre

38、/s and not more than0.05litre/s when the spray tap is opened through180 from the commencement of flow. When the spray tap is fully open the flow shall not increase by more than10% from the flow obtained at180 of opening. 12.2 Spray taps with adjustable flow restrictors. When tested by the method spe

39、cified inAppendix C, spray taps fitted with adjustable flow restrictors shall, when the restrictor is suitably adjusted and when the spray tap is opened through180 from the commencement of flow, deliver water at a rate of not less than0.03litre/s and not more than0.05litre/s. When the spray tap is f

40、ully open, the flow shall not increase by more than10% from the flow obtained at180 of opening. 13 Test for divergence of the spray When tested by the method specified inAppendix D, for flow rates of0.03litre/s and0.05litre/s, spray taps shall produce a spray of water the whole of which shall enter

41、the gauge, as follows (seeFigure 5). a) No water shall enter the outer annulus. b) Not less than10% and not more than90% shall enter the inner annulus. c) The remainder shall enter the centre cylinder. The inner annulus is evenly divided into four sections each with its own separate take-off point.

42、Each of the four inner annulus take-off points shall collect between15% and30% of the water flowing into the inner annulus. NOTEDrawing is diagrammatic only. Figure 3 Diagram of rate of flow test apparatusBS5388:1976 4 BSI 12-1999 Table 2 Dimensions of pressure take-off tee NOTEDrawing is diagrammat

43、ic only Figure 4 Details of pressure take-off tee Size A B C D E F G H J K L “ 15 31 12.7 33 55 27 12.5 G! 43 0.5 21 NOTEAll dimensions are in millimetres.BS5388:1976 BSI 12-1999 5 NOTE 1Walls of annular gauge to be not more than 1 mm thick. NOTE 2Drawing is diagrammatic only. Figure 5 Sectional dia

44、gram of spray, spray outlet and annular gaugeBS5388:1976 6 BSI 12-1999 Appendix A Information to be supplied by the purchaser The purchaser shall supply the following information when making an enquiry or placing an order: a) the nominal size of the spray tap, i.e. “ nominal size; b) whether a bib t

45、ype mounting or a pillar type mounting is required; c) whether a rising or non-rising spindle is required; d) the working pressure (bar) to which the spray tap will be subjected (seeTable 1); e) the type of flow restrictor. Appendix B Method of measuring the rateof flow through spray taps fitted wit

46、ha fixed flow restrictor B.1 Object The object of the test is to determine whether or not the specimen spray tap will deliver water at the specified rates. B.2 Apparatus The following are required. B.2.1 A water supply having a minimum pressure of4.50bar and a minimum rate of flow, when the supply p

47、ipe is open to atmosphere, of0.10litre/s. B.2.2 A stopvalve B.2.3 A pressure regulator capable of reducing the supply pressure to the test pressures required. B.2.4 A flowmeter, graduated in ml/s and accurate to2%. B.2.5 A pressure gauge, graduated in bar and accurate to 2%. B.2.6 A copper tube of15

48、mm outside diameter in accordance with BS2871-1. B.2.7 Fittings necessary to complete the test apparatus shown inFigure 3. The bore of any fitting shall be at least equal to the bore of the copper tube (seeB.2.6) used in the apparatus to avoid constriction of the waterway. B.3 Procedure Connect the

49、apparatus to the water supply. Install the number 1 restrictor in the spray tap. Connect the spray tap to the test apparatus. With the stopvalve fully open, and the spray tap closed, adjust the supply pressure to the test pressure specified inTable 1 for number1 flow restrictors. Open the spray tap by rotating its hand control through180 from the commencement of flow. Record the rate of flow. Open the spray tap fully. Record the rate of flow. Repeat the procedure with number2 and number3 flow restrictors installed in the spray tap