1、BRITISH STANDARD BS4082-2: 1969 Specification for External dimensions forvertical in-line centrifugal pumps Part2: “U” typeBS4082-2:1969 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,was published underthe authority of theExecutive Board on 30 A
2、pril1969 BSI10-1999 The following BSI references relate to the work on this standard: Committee references MEE/29 and MEE/29/2 Draft for comment67/16816 ISBN580 05009 2 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard w
3、as prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on
4、the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Institute of Marine Engineers Association of Consulting Engineers Institution of Civil Engineers Association of Mining Electrical and Institution of Gas Engineers Mechanical Engineers Instit
5、ution of Heating and Ventilating Board of Trade Engineers* British Chemical Plant Manufacturers Institution of Mechanical Engineers* Association* Institution of Mechanical Engineers British Compressed Air Society (Automobile Division) British Electrical and Allied Manufacturers Institution of Produc
6、tion Engineers Association* Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Board Manufacturers Association* Machine Tool Trades Association British Mechanical Engineering Ministry of Defence*
7、 Confederation* Ministry of Defence, Army Department* British Pump Manufacturers Association* Ministry of Power British Steel Industry Ministry of Public Building and Works Crown Agents for Oversea Governments and Ministry of Technology* Administrations* Ministry of Technology National Department of
8、 Employment and Productivity Engineering Laboratory* (H.M. Factory Inspectorate) Ministry of Transport Electricity Council, the Central Electricity National Coal Board* Generating Board and the Area Boards in National Physical Laboratory (Ministry of England and Wales* Technology) Engineering Equipm
9、ent Users Association* Radio Industry Council Gas Council* Royal Institute of British Architects Association of Hydraulic Equipment Institution of Electrical Engineers Manufacturers Institution of Mining Engineers British Hydromechanics Research Institution of Water Engineers Association Metropolita
10、n Water Board Heating, Ventilating and Air Conditioning Ministry of Defence, Navy Department Manufacturers Association Oil Companies Materials Association Amendments issued since publication Amd. No. Date CommentsBS4082-2:1969 BSI 10-1999 i Contents Page Co-operating organizations Inside front cover
11、 Foreword ii 1 Scope 1 2 Definitions 1 3 Selection of pump 1 4 Pressure and temperature ratings 4 5 Designation of pump 4 6 Dimensions 4 7 Branches and branch flanges 6 8 Direction of rotation 7 Appendix A Derivation of the basic selection chart grid 8 Appendix B Change of speed 8 Figure 1 Basic sel
12、ection chart for pumps 3 Figure 2 Dimensions for vertical in-line pumps “U” Type 6 Figure 3 Selection chart for pumps operating at1450rev/min. 9 Figure 4 Selection chart for pumps operating at1750rev/min. 10 Figure 5 Selection chart for pumps operating at3500rev/min. 11 Table 1 Quantity classificati
13、on 1 Table 2 Differential head classification 2 Table 3 Casing test pressure rating 4 Table 4 Standard dimensions for “U” type pumps 5 Table 5 Tolerances 5 Table 6 Branch flanges 7BS4082-2:1969 ii BSI 10-1999 Foreword This standard makes reference to the following British Standards: BS1560, Steel pi
14、pe flanges and flanged fittings for the petroleum industry. BS4082, External dimensions for vertical in-line centrifugal pumps. BS4082-1, “I” type. BS. . . ., Flanges and bolting for pipes, valves and fittings 1) . This British Standard, prepared under the authority of the Mechanical Engineering Ind
15、ustry Standards Committee and at the request of pump manufacturers and users, forms Part2 of a series dealing with the standardization of the principal external dimensions of a range of vertical “in-line” centrifugal pumps, and applies to pumps with the “U” configuration of the inlet and outlet bran
16、ches (seeClause2, Definitions). The standard has been prepared to provide a range of standard principal external dimensions (metric) for specified duties, to ensure interchangeability of pump units. Pumps of the peripheral or gear type normally associated with small quantities are not precluded from
17、 complying with this standard, provided they conform to the requirements in Clause2 and the dimensions in Table 4. The standard does not require pump manufacturers to produce pumps for all the operating zones defined on the basic selection chart (Figure 1). Pumps for duties outside the zones defined
18、 may be developed for inclusion in this British Standard at a later date. Provision has been made within this British Standard for pump flanges to be in accordance with BS. . . .,“Flanges and bolting for pipes, valves and fittings” 1) , or alternatively to BS1560, “Steel pipe flanges and flanged fit
19、tings for the petroleum industry”. Both these standards are in metric units. It should be noted that BS. . . . 1)reflects current European practice and is based on the International Federation of the National Standardization Associations (ISA) Bulletin5A(1940), “Pipes and fittings”, which also forms
20、 the basis for European Standards on flanges including the German DIN Standards. Flanges to BS1560 (Class300) correspond closely to ASA B.16.5(300) and BS1560(Class150) correspond closely to ASA B.16.5(150). It is therefore recommended that in view of the international usage of the type of pump cove
21、red by this British Standard, the flange dimensions adopted for castings should be the greatest envelope dimensions (diameter and thickness) provided by these standards. This standard does not provide, at present, dimensional requirements for the flange connection between the pump and the motor, sha
22、ft extensions nor shaft ends, but it is intended to include such requirements in a later edition. Requirements relating to the performance testing of pumps are given in BS599, “Methods of testing pumps”. A further standard in this series is BS4082-1, covering pumps with the “I” configuration of the
23、inlet and outlet branches. It is proposed to submit this British Standard to the International Organization for Standardization (ISO) as the basis for a future ISO Recommendation. NOTEThe coherent system of units adopted by ISO, known as the SI system has been used in this British Standard. The pres
24、sure unit adopted is the “bar”, which is not itself an SI unit, but which is defined as10 5 N/m 2 , where the newton (N) is the SI unit of force. The “bar” also approximates to one atmosphere. Information concerning SI units is given in BS350, “Conversion factors and tables”, and PD5686, “The use of
25、 SI units”. 1) In course of preparation.BS4082-2:1969 BSI 10-1999 iii A British Standard does not purport 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 immu
26、nity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, pages1to11 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 ins
27、ide front cover.iv blankBS4082-2:1969 BSI 10-1999 1 1 Scope This British Standard specifies the principal external dimensions of a range of vertical “in-line” centrifugal single-stage pumps of the “U” type, normally driven by vertical close-coupled electric motors. Other forms of drive are not exclu
28、ded, provided the pump complies with the requirements of2.1. 2 Definitions For the purposes of this British Standard the following definitions apply: 2.1 vertical “in-line” centrifugal pump a pump with the inlet and outlet branches arranged in the “U” configuration and having all the following featu
29、res: a) A vertical shaft axis. b) A driving unit supported exclusively by the pump. c) Inlet and outlet branch connections, identical in rating (but not necessarily in size) with the flange faces in the same vertical plane. The axes being parallel in the horizontal plane with the outlet branch locat
30、ed on the horizontal axis of the pump and the inlet branch displaced by dimension “U” as given in Table 4. 2.2 “close-coupled” a form of construction where the impeller is mounted on the shaft of the driving unit 3 Selection of pump The pump size for a given duty point of quantity and differential h
31、ead shall be determined from the basic selection chart, Figure 1. This is based on a rotational speed of2900rev/min except for pumps designated60D and60E which are based on a rotational speed of1450rev/min. This chart defines the zone of operation in terms of quantity and differential head for each
32、pump size, based on the assumption that the liquid handled is clean water at17 C with a mass density of988kg/m 3 . A series of selection charts, Figure 3,Figure 4and Figure 5, are included in Appendix B, and give guidance on pump selection at rotational speeds of1450rev/min,1750rev/min and3500rev/mi
33、n. These charts have been derived from the basic selection chart (Figure 1)and it should be noted that the quantity-differential head code classification is independent of the rotational speed. Each zone of operation, and the corresponding pump, is defined by reference to a quantity and differential
34、 head datum point designated by: 1) A number code classifying the quantity. 2) A letter code classifying the differential head. The numerical values assigned to the codes are given in Table 1 and Table 2. Table 1 Quantity classification Code Cubic metres per hour 10 20 30 40 50 60 12 24 48 96 192 38
35、4BS4082-2:1969 2 BSI 10-1999 Table 2 Differential head classification The basic selection chart has been compiled on the assumption that the maximum efficiency points of the pump coincide with the quantity-differential head datum points. The top line of each quantity-differential head zone defines t
36、he upper limit of operation but does not represent the performance characteristic curve of the pump. A pump unit will normally be supplied to perform one specified quantity-differential head duty within the zone, but with adjustment or replacement of impeller and driving unit, will be capable of any
37、 duty within this zone. The derivation of the basic selection chart is given in Appendix A. Code Metres B C D E F G H 10 16 25 40 64 100 160BS 4082-2:1969 BSI 10-1999 3 NOTEThis chart is based on a rotational speed of2900rev/min except for pumps designated 60D and60E which are based on a rotational
38、speed of1450rev/min (seeAppendix B). Figure 1 Basic selection chart for pumpsBS4082-2:1969 4 BSI 10-1999 4 Pressure and temperature ratings 4.1 Pressure rating. Pumps complying with this British Standard shall be manufactured in two casing pressure ratings, a high pressure series designated by a cod
39、e letter R, and a low pressure series designated by a code letter L. The hydrostatic test pressure corresponding to these two series shall be as specified in Table 3. Table 3 Casing test pressure rating The low casing pressure series L shall not be available for pumps in the differential head code “
40、H”. 4.2 Temperature rating. Pumps shall be capable of operating at a temperature rating up to and including175 C, with the substitution of suitable glands, joints and other accessories, as necessary. 5 Designation of pump Pumps shall be designated by a code embodying the following information: 6 Dim
41、ensions The principal external dimensions of each standard pump shall be in accordance with the dimensions specified in Table 4. Code Pressure (max.) R L 60bar(6000kN/m 2 ) 25bar(2500kN/m 2 )BS4082-2:1969 BSI 10-1999 5 Table 4 Standard dimensions for “U” type pumps The “P” dimension shall be taken t
42、o the joint faces and shall be identical for the high pressure (R) and low pressure (L) casing series. The “U” dimension shall be measured between the respective axes of the inlet and outlet flanges. The tolerances on dimensions “P”,“T”,“G” and “U” shall be as given in Table 5. Table 5 Tolerances (A
43、ll dimensions are in millimetres) Quantity code Differential head code Nominal branch size Dimensions Inlet Outlet P T G U 10 B C&D E&F G 40 40 160 180 265 355 125 150 180 20 B C&D E&F G 50 50 180 212 265 355 125 200 190 30 C&D E&F G&H 80 50 250 300 400 160 250 212 40 D E&F G&H 100 80 250 300 400 22
44、4 250 265 50 E&F G&H 150 100 355 400 250 250 315 60 F G&H D&E 200 150 375 450 530 300 280 375 P T G U +1.5mm 1.5mm +0mm 1.5mm +1.0mm 1.0mm +1.5mm 1.5mmBS4082-2:1969 6 BSI 10-1999 7 Branches and branch flanges 7.1 Branches. Inlet and outlet branch sizes shall be as stated in Table 4. A foot shall be
45、incorporated to support the pump unit as illustrated inFigure 2. 7.2 Branch flanges. The pump inlet and outlet branch flanges shall be drilled as specified by the purchaser in accordance with the requirements of Table 6. Figure 2 Dimensions for vertical in-line pumps “U” type Symbols for standardize
46、d dimensions Letter symbol Dimensions description G P T U Distance between centre line of fixing holes about axes of pump foot. Distance from face of pump inlet or outlet to vertical centre line. Distance from centre line of pump inlet and outlet to bottom face of pump foot. Distance between centre
47、line of pump inlet and outlet.BS4082-2:1969 BSI 10-1999 7 Table 6 Branch flanges Flanges shall be flat faced and of a thickness not less than that to the raised face portion of the corresponding raised face flange specified in the British Standards listed in Table 6. The flanges shall be fully machi
48、ned across the face and drilled off-centre. The rear of the flanges in the vicinity of the bolt holes shall be parallel with the joint face. This can be achieved by fully machining the rear face of the flange, by spot facing or other equally suitable methods. To ensure parallelism of the flanges, th
49、e casing shall be checked against a plane surface when at no point shall the gap at the joint faces exceed0.5mm. 8 Direction of rotation The direction of rotation shall be clockwise or anticlockwise when viewed from the driving unit, as preferred by the individual manufacturer. The direction of rotation shall be clearly indicated by means of an arrow on the pump casing in the direction of the flow. Casing pressure series Branch flanges R a BS. . . . (Metric) Nominal pressure 40bar (4000kN/m 2 ) b BS1560 (Metric)
