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1、BRITISH STANDARD BS 1564:1975 Incorporating Amendment No. 1 Specification for Pressed steel sectional rectangular tanks UDC 621.642.03 112:669.14 135 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:08:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1564:1975 This British Standard, having
2、been approved by the Mechanical Engineering Industry Standards Committee, was published under the authority of the Executive Board on 29 August 1975 BSI 08-1999 First published June 1949 First revision August 1975 The following BSI references relate to the work on this standard: Committee reference
3、MEE/92 Draft for comment 74/70317 DC ISBN 0 580 08573 2 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and professional and industria
4、l organizations: Associated Offices Technical CommitteeDepartment of Industry National Association of Consulting EngineersEngineering Laboratory Association of Hydraulic Equipment Department of Trade Manufacturers LtdElectricity Supply Industry in England and Association of Mining Electrical and Wal
5、es Mechanical EngineersEngineering Equipment Users Association British Compressed Air SocietyFederation of Manufacturers of Construction British Electrical and Allied Manufacturers Equipment and Cranes AssociationInstitution of Gas Engineers British Gas CorporationInstitution of Heating and Ventilat
6、ing British Gear Manufacturers AssociationEngineers British Internal Combustion Engine Institution of Mechanical Engineers Manufacturers AssociationInstitution of Plant Engineers British Mechanical Engineering ConfederationInstitution of Production Engineers British Pump Manufacturers AssociationLon
7、don Transport Executive British Steel CorporationMachine Tool Trades Association British Steel Industry*Ministry of Defence Crown Agents for Oversea Governments and National Coal Board AdministrationProcess Plant Association Department of Employment (HM Factory Railway Industry Association of Great
8、Britain Inspectorate)Royal Institute of British Architects* Department of the EnvironmentSociety of Motor Manufacturers and Traders Department of Industry Mechanical Telecommunication Engineering and EngineeringManufacturing Association The organizations marked with an asterisk in the above list, to
9、gether with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Constructional Steelwork AssociationInstitution of Municipal Engineers British Launderers Research AssociationInstitution of Structural Engineers British Railways Bo
10、ardSteel Castings Research these should be the subject of mutual arrangement between the purchaser and the manufacturer at the time of the enquiry and order. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for thei
11、r 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, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (se
12、e copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24 06:08:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1564:1975 BSI 08-19991 1 Scope This British Standard spec
13、ifies requirements for pressed steel sectional rectangular tanks, working under a pressure not greater than the static head corresponding to the depth of the tank, built up of pressed steel plates 1 220 mm square used to contain cold water, hot water, potable liquids, certain oils and chemicals. Tan
14、ks may be constructed as follows: a) with external flanges; b) with internal bottom flanges, external side and end flanges. Two types are specified: Type 1. With a combined double flange at an angle of 45 and 90 to the plane of the plate on all four sides as illustrated in Figure 1. The plates of ty
15、pe 1 tanks are hot pressed complete. Type 2. With a single flange at an angle of 90 to the plane of the plate on each of two, three or four sides, depending on its position in the tank. Type 2 tanks are cold pressed as illustrated in Figure 2, with the flange corners welded. This standard does not p
16、rovide for tanks subject to earth or other external pressure other than wind pressure. NOTEFor an illustration of a typical tank with external flanges see Figure 8. For approximate weights and full nominal capacities (without freeboard) of open top tanks see Table 1 to Table 4. Tanks can also be ass
17、embled with all flanges internal with the addition of other components, but because of the difficulty of assembling and maintaining this type of tank they are not preferred. All tanks can be supplied with open or closed top. Information on erection and supports is also included. 2 References The tit
18、les of the British Standards referred to in this standard are listed on the inside back cover. 3 Information to be supplied with the enquiry and order The following information, as appropriate, should be supplied by the purchaser with his enquiry or order. a) Type of tank required (clause 1), type o
19、f cover (if any), number and position and type of manhole(s), number of divisions if required. b) Capacity required in litres or dimensions in millimetres in multiples of 1 220 mm and whether any provision is to be made for future extension and if any level indicators are required. c) Limiting condi
20、tions, if any, as to space and accessibility for erection, and whether the tank will be erected in a building or exposed to the weather, and the height above ground level it is to be installed. d) Nature and density of liquid for which the tank is required. If corrosive, particulars to be given. If
21、water, state whether hard or soft. The rate of filling and emptying the tank, head fluctuations and cycles per day. e) Maximum and minimum temperatures and approximate rate of fluctuation and position of heating elements. f) Any special requirements as to jointing material and as to internal and ext
22、ernal coating or lagging. NOTE 1In the absence of any special requirements one coat of a suitable priming paint will be applied to protect the tank during delivery and erection. A minimum of two further coats should be applied after erection. NOTE 2Attention is drawn to the recommendations given in
23、BS 5493. g) Particulars of connections and drilling required and precise location on tank with dimensioned sketches, having regard to possible future requirements. h) Whether external access ladders are required and, if so, particulars to be given. i) Details of any existing or proposed supporting s
24、tructure and height of bottom of tank above ground level so that the necessary scaffolding arrangements can be made to comply with statutory safety regulations. j) Whether transverse supporting bearers are required and, if so, particulars as to span and end support to be given. k) Whether the tank i
25、s to be used for other than a stationary application. l) Whether inspection will be made by the representative of the purchaser at the works of the manufacturer. m) Whether erection is to be carried out by the manufacturer at site; if so, information as to site conditions and accessibility to be giv
26、en by the purchaser. 4 Working temperatures For the purposes of this standard cold liquids are defined as those having a temperature not exceeding 38 C and hot liquids are defined as those having a temperature exceeding 38 C but less than 100 C. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 24
27、 06:08:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1564:1975 2 BSI 08-1999 In the case of tanks to hold hot liquids, care shall be taken in use to avoid excessive vibration or turbulence. Tanks for temperatures higher than 100 C should be the subject of mutual arrangement between the purchaser
28、and the manufacturer. 5 Materials 5.1 The steel used in the manufacture of the plates, stays, cleats and pads for connections shall conform to the requirements of BS 4360:1972 grade 43A or BS 1449-1:1972 material HR 14. 5.2 Bolts and nuts shall be made from steel complying with the requirements of B
29、S 4190, or grade 8.8 of BS 3692 as appropriate (see clause 11). studs and washers shall comply with the requirements of BS 4439 and BS 4320 respectively. 6 Dimensions of unit plates The nominal size of unit plates shall be 1 220 mm square, the actual overall dimensions depending upon the particular
30、manufacturer of the plates. The size of tanks shall be specified as multiples of the nominal dimension. 7 Thickness of unit plates 7.1 For cold liquids with a density not exceeding 1.0 the nominal thickness of the plate from which the unit plates are pressed shall be not less than: 7.2 For hot liqui
31、ds with a density not exceeding 1.0 no plate shall be less than 6 mm in thickness. 7.3 For cold or hot liquids with a density greater than 1.0 the plate thicknesses shall be a matter for mutual arrangement between the purchaser and the manufacturer. 8 Permissible stresses The calculated stress in an
32、y stay and attachment and bolts shall comply with the requirements of BS 449, and any allowance that may be required for corrosion shall be added to the calculated thickness. 9 Flanges of plates Plates shall be pressed with a combined double flange at an angle of 45 and 90 to the face of the plate o
33、n all four sides (type 1 Figure 1) or a single flange at an angle of 90 to the face of the plate on each of two, three or four sides (type 2 Figure 2), the flanges holed according to the respective position of the plate in the tank and free from irregularities. The width of flanges shall be not less
34、 than 45 mm, the holes for the bolts having a clearance of 2 mm on diameter. The spacing of bolt holes shall not exceed 76.2 mm pitch. 10 Jointing material The jointing to be used for tanks shall be suitable for the conditions and shall be a matter for mutual agreement between the purchaser and the
35、manufacturer. Any jointing used shall be insoluble in the liquid to be stored and, where necessary, shall be non-toxic. 11 Bolts, nuts and washers 11.1 The minimum size of flange bolts and nuts shall be either: a) M12 complying with grade 8.8 of BS 3692; or b) M14 complying with BS 4190. 11.2 Each f
36、lange bolt shall be fitted with a flat washer under the nut. Where BS 3692, M12 bolts are used, the washers shall be form G with a minimum thickness of 3 mm. Where BS 4190 bolts are used, the washers shall be form F. 12 Staying 12.1 The sides and ends of all tanks shall be supported by stays at the
37、junction of two or more plates; the stays shall be made from mild steel rolled sections calculated in accordance with clause 8. Stays shall be attached to the plates by bolting to cleats of equal strength bolted to tank plates; stay attachments to cleats and cleats to the tank plates shall be calcul
38、ated taking into account any eccentricity of loading. The ends of the stays shall be attached to the cleats or tank plates by bolts. 12.2 Stays shall connect sides to bottom, ends to bottom and/or horizontally sides to sides and sides to ends generally in accordance with Figure 8. mm Tanks 1 220 mm
39、in depth: bottom, sides and ends.5 Tanks 2 440 mm in depth: bottom, sides and ends.5 Tanks 3 660 mm in depth: bottom, sides and ends. 5 Tanks 4 880 mm in depth: bottom, and first tier of sides and ends6 second, third and top tiers of sides and ends.5 Licensed Copy: sheffieldun sheffieldun, na, Fri N
40、ov 24 06:08:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 1564:1975 BSI 08-19993 13 Connections 13.1 Pads for connections, tapped bosses, screwed flanges or sockets, as may be required by the purchaser, shall be welded to the inside or outside or bolted to the tank plate. Pads shall be drilled, a
41、nd/or tapped as necessary to suit flanges complying with the requirements of BS 4504, or such other standard as specified by the purchaser. Single pads shall be provided for connection on one side of the plate and double pads for connection on both sides of the plate. Tapped sockets shall comply wit
42、h the requirements specified in BS 1387. Typical types of welded connections are shown in Figure 3 to Figure 7. 14 Welding of connections Welds for connections shall be made by the metal-arc process complying with the requirements of BS 1856 and by means of covered electrodes complying with the requ
43、irements of BS 639:1972 sections 1 and 2: grade 1. 15 Supports All tanks shall be effectively supported in accordance with the manufacturers recommendations and tolerances. Supports shall be provided continuously under each bottom flange in one direction at 1 220 mm centres. Tanks with internal bott
44、om flanges can also rest directly on a flat level base. A sand/bitumen bed 50 mm thick is recommended in that case. Where steel joists are used they shall be designed to carry the imposed load with a maximum deflection of one five-hundredth of the span. Attention is drawn to the extra reaction on th
45、e supports under the side, end and division plates when the stays of sides, ends and divisions are inclined to the bottom of the tank. 16 Closed top tanks 16.1 Cover framing members shall be designed to withstand superimposed loadings complying with the requirements of BS 449. 16.2 Covers may be fla
46、t for indoor use and should be pitched or cambered for outdoor use, and jointed to ensure that they are dust and weather proof. 16.3 Covers may be constructed of steel plates or other constructional cladding materials. 16.4 In all cases closed top tanks shall be provided with a manhole of not less t
47、han 460 mm diameter clear opening to give access to the inside of the tank and with a suitable vent, filtered if necessary, to the manufacturers requirements to avoid pressure changes within the tank. 17 Access ladders Tanks over 1 220 mm deep shall be provided with a steel internal access ladder. I
48、n covered tanks the ladder shall be adjacent to the manhole. NOTEExternal ladders may be provided if required; attention is drawn to BS 4211. 18 Marking All tanks complying with the requirements of this standard shall be legibly marked as follows. a) Manufacturers name, mark or initial. b) The numbe
49、r of this British Standard, i.e. BS 1564. 19 Minimum access Where tanks with external flanges are to be erected in a confined space it is essential that a clearance of not less than 500 mm shall be provided all round the outside and underneath to facilitate erection. For access to the top of a closed tank the clearance at the top shall be not less than 750 mm. NOTEAllowance should be made for inspection and maintenance, including valves or other external fittings. 20 Inspection 20.1 Works inspection. The purchaser or his representative shall have access to th