CEN TR 13931-2009 Rotodynamic pumps - Forces and moments on flanges - Centrifugal mixed flow and axial flow horizontal and vertical shafts pumps (Incorporating Corrigendum June 201.pdf

1、PD CEN/TR13931:2009ICS 23.080NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWPUBLISHED DOCUMENTRotodynamic pumps Forces andmoments on flanges Centrifugal, mixedflow and axial flowhorizontal and verticalshafts pumpsIncorporating corrigendum June 2010National forewordThis Publish

2、ed Document is the UK implementation of CEN/TR 13931:2009, incorporating corrigendum June 2010.The UK participation in its preparation was entrusted to Technical Committee MCE/6, Pumps and pump testing.A list of organizations represented on this committee can be obtained on request to its secretary.

3、This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.PD CEN/TR 13931:2009This Published Document was published under the authority of

4、 the Standards Policy and Strategy Committee on 28 February 2009 BSI 2010Amendments/corrigenda issued since publicationDate Comments 31 August 2010 Implementation of CEN/TR corrigendum June 2010; Figure in Table 6 replacedISBN 978 0 580 71462 7TECHNICAL REPORTRAPPORT TECHNIQUETECHNISCHER BERICHTCEN/

5、TR 13931January 2009ICS 23.080English VersionRotodynamic pumps - Forces and moments on flanges -Centrifugal, mixed flow and axial flow horizontal and verticalshafts pumpsPompes rotodynamiques - Forces et moments applicablesaux brides - Pompes centrifuges, hlico-centrifuges ethlices axes horizontal e

6、t verticalRotodynamische Pumpen - Zulssige Flanschenkrfte undMomente - Kreiselpumpen, Halbaxialaufpumpen undAxialpumpen mit horizontaler und verticaler AchseThis Technical Report was approved by CEN on 13 October 2008. It has been drawn up by the Technical Committee CEN/TC 197.CEN members are the na

7、tional standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and

8、United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. CEN/TR 13931:2009

9、: EIncorporating corrigendum June 2010Supersedes CR 1393 :2000 1PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 2 Contents Page 1 Scope 42 Normative references 43 Responsibilities of manufacturer and purchaser . 43.1 General 43.2 Design considerations 44 Criteria adopted in setting limiting forces and mom

10、ents 54.1 Shaft-end movement . 54.2 Distortion of the pump casing 54.3 Validity of force and moment values Effects of materials and temperature 55 Horizontal shaft pumps . 65.1 Definition of pump families and summary of features . 65.2 Calculation of maximum permissible forces and moments 115.3 Maxi

11、mum permissible forces and moments on standardised or modular pump families . 145.3.1 General 145.3.2 Composition of forces and moments 145.3.3 Possibility of adapting the tables to other pumps of similar design . 145.4 Other horizontal pump families 145.5 Practical considerations for horizontal sha

12、ft pumps . 146 Vertical shaft pumps . 156.1 Definition of pump families and summary of features . 156.1.1 Installation types 156.1.2 Position(s) of flange(s) 166.2 Calculation of maximum permissible forces and moments 196.3 Maximum permissible forces and moments on pump flanges . 216.3.1 General 216

13、.3.2 Suspended shaft pumps generally used for transporting water (“for water“) 216.3.3 “In line“ pumps 226.4 Practical considerations for vertical shaft pumps . 22Annex A (informative) Horizontal shaft pumps - Calculation of forces and moments for reinforced and/or concrete mountings for families 2,

14、 3.B, 3.C, 5.A, 5.B, 6, 7 and 8 23Annex B (informative) Specifications relating to additional possibilities . 24B.1 General 24B.2 Horizontal pumps only 24B.2.1 Pump stopped 24B.2.2 Reinforced and/or concrete mounting 24B.3 Horizontal and vertical pumps . 27B.3.1 Prestressing on the pipework 27B.3.2

15、Weighting or compensation formula . 27B.3.3 Limit of accumulation of possibilities . 28Bibliography 29PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 3 Foreword This document (CEN/TR 13931:2009) has been prepared by Technical Committee CEN/TC 197 “Pumps”, the secretariat of which is held by AFNOR. Attenti

16、on is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CR 13931:2000. The pumps families are numbered sequentially, leaving

17、 room for the inclusion of additional types if required at a later date: horizontal shaft pumps: N 1 to 81; vertical shaft pumps: N 20 to 361. The pump families are described and illustrated in Tables 2 and 5. Annexes A and B are for information only. 1 Numbers 9 to 19 are reserved for potential new

18、 families of pumps. PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 4 1 Scope This CEN Technical Report provides information for the calculation of maximum permissible forces and moments allowed on the flanges of various types of horizontal and vertical shaft rotodynamic pumps, caused by the reaction to p

19、ipework that is rigidly connected to the installation. This document does not take into account the effect of any elastic or deformable linkages, such as bellows, elastic joints, self butting sliding joints, etc. This CEN Technical Report is not applicable to multistage monobloc pumps, whose outlets

20、 are remote from the installation plane, or to horizontal shaft pumps mounted vertically for installation reasons, such as, fixing to a vertical wall. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edit

21、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 22858, End-suction centrifugal pumps (rating 16 bar) - Designation, nominal duty point and dimensions (ISO 2858:1975) EN ISO 5199:2002, Technical specifications for centrif

22、ugal pumps - Class II (ISO 5199:2002) API 610, Centrifugal pumps for general refinery service 3 Responsibilities of manufacturer and purchaser 3.1 General The manufacturer should inform the purchaser of the family to which the equipment offered belongs. The purchaser should calculate the loads appli

23、ed to the pump at its flanges, considered for all possible relevant conditions (at ambient temperature, at operating temperature, at rest, under pressure). The purchaser should ensure that the values of these loads do not exceed the corresponding calculated limits for the pump selected. If they do,

24、the pipework should be modified to reduce the loads, or a different type of pump, capable of withstanding higher loads, shall be selected. Both parties should agree on the type of baseplate to be provided (conventional, reinforced, concrete, etc.). The basic values given in Tables 2 and 5 and Annex

25、B correspond to the most common sizes of pumps; for larger sizes of pumps, the manufacturer shall indicate the limiting values. 3.2 Design considerations Excessive loads transmitted to a pump by the piping can compromise smooth running and reduce the life of the pump, the coupling and perhaps the mo

26、tor bearings, increase the demand for maintenance and, in the extreme, will cause failure. These adverse effects result from two distinct causes: displacement of the pump shaft end relative to that of the driver. The misalignment will overload the pump and driver bearings and, when a flexible coupli

27、ng is used, increase its rate of wear. PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 5 distortion of the pump casing, changing the internal clearances between the fixed and rotating parts, thus increasing wear and vibrations, sometimes leading to seizure. If mechanical seals are installed, parallelism o

28、f the faces will be upset, causing leakage and rapid breakdown. It is for these reasons that limits must be set to the external forces and moments acting on the flanges. Manufacturers are responsible for verifying that the pump offered will operate satisfactorily when these limits are not exceeded.

29、4 Criteria adopted in setting limiting forces and moments 4.1 Shaft-end movement The lateral displacement of the shaft-end, relative to a fixed point in space, is given in Table 1 for the various pump families, as a function of shaft size. Table 1 Criteria for forces and moments limitations Type of

30、pump Families Shaft-end diameter (mm) Displacement (mm) Standard (N) Modular 1A, 1B 3A 4A, 4B 40 (N42) 0,15 0,20 0,25 Other horizontal Pumps 2, 3B, 3C 5A, 5B 6, 7, 8A, 8B, 8C 50 50 50 0,125 0,175 0,175 Vertical pumps All (20A-36B) All 0,150 4.2 Distortion of the pump casing It is the responsibility

31、of the pump manufacturer to verify that the loads applied on the flanges, in any of the permitted combinations, do not cause greater changes in internal clearance or disturbances to the mechanical seals than are allowed by his own design rules or those of the specifications imposed by the user, whic

32、hever are the more stringent. 4.3 Validity of force and moment values Effects of materials and temperature Unless indicated otherwise, the values for forces and moments are given for the basic material for the pump family (see Tables 2 and 5) and for a maximum permissible temperature as shown. For o

33、ther materials and higher temperatures, the values shall be corrected by applying the modulus of elasticity relation, namely: 20btmEEwhere E20bmodulus of elasticity of the basic material at 20 C PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 6 Et.mmodulus of elasticity of the selected material at tempera

34、ture t C For lamellar graphite cast iron, unalloyed steel and grade 18.8 stainless steel, refer to the graph in Figure 1. t (C) Key A Unalloyed steel B Type 18.8 stainless steel C Grey cast iron Figure 1 Variation of modulus of elasticity (E) as a function of temperature 5 Horizontal shaft pumps 5.1

35、 Definition of pump families and summary of features Pump families are defined on the basis of the most commonly used geometric configurations and the most frequent operating conditions. They are numbered from 1 to 8, as listed and described in Table 2. Pumps with characteristics different from thos

36、e in Table 2 should be subject to agreement between the parties concerned. PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 7 Table 2 Characteristics of horizontal pump families Family No. and Number of stages 1)General Picture and description Technical limits Material Remarks Coefficients to apply to basi

37、c values Additional possibilities 2)Allowable Working Flange DNmax Forces (N) Moment (N.m) Reinforced mounting Other pressure bar Temperature C 1.A 1 stage Single stage, overhung bearing frame; feet on casing; mounted at base level. 10 110 200 (Outlet)Cast iron Dimensions in accordance with EN 22858

38、. x 0,50 X 0,50 yes no 1.B 1 stage 16 250 200 (Outlet)Cast steel x 1 x 1 yes no 2 1stage Axial inlet; outlet vertical on pump centreline. 10 110 500 Cast iron x 0,40 x 0,40 yes no 3.A 1 stage Single stage, overhung bearing frame; feet on casing; mounted at centreline level. Axial inlet; outlet verti

39、cal on pump centreline. 30 300 200 (Outlet)Cast steel Pump similar to EN 22858 but with casing mounted at centreline level. x 1,2 x 1,2 yes no 3.B 1 stage or 2 stages Single or two stage, overhung bearing frame; feet on casing; mounted at centreline level. Axial or overhead inlet; outlet vertical. 5

40、5 430 350 Cast steel Equipment in accordance with API 610. x 0,85 (- 500) on every axis x 1 yes yes PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 8 Table 2 (continued) Family No. and Number of stages 1)General Picture and description Technical limits Material Remarks Coefficients to apply to basic value

41、s Additional possibilities2)Allowable Working Flange DNmax Forces (N) Moment (N.m) Reinforced mounting Other pressure bar Temperature C 3.C 1 stage Single stage, impeller between bearings; feet on casing; mounted at centreline level. Inlet vertical; outlet vertical. 55 530 450 Cast steel Equipment i

42、n accordance with API 610. x 1 x 1 yes yes 4.A Single stage, overhung bearing frame; feet on bearing frame; mounted at base level. Axial inlet; outlet vertical on pump centreline or tangential. Cast iron x 0,35 x 0,35 yes no 4.B 10 110 200 Cast steel x 0,60 x 0,60 yes no 5.A 1 stage or 2 stages Sing

43、le or two stage; impeller between bearings; horizontal joint plane; feet on casing; mounted at base level. Inlet and outlet perpendicular to shaft axis. 20 110 600 Cast iron x 0,40 x 0,30 no no PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 9 Table 2 (continued) Family No. and Number of stages 1)General

44、Picture and description Technical limits Material Remarks Coefficients to apply to basic values Additional possibilities2)Allowable Working Flange DNmax Forces (N) Moment (N.m) Reinforced mounting Other pressure bar Temperature C 5.B 1 stage or 2 stages Single or two stage; impeller between bearings

45、; horizontal joint plane; feet on casing; mounted at base level. Inlet and outlet perpendicular to shaft axis. 120 175 450 Cast steel Equipment in accordance with API 610. x 1 x 1 yes yes 6 Multi-stage Multi-stage; impellers between bearings; vertical joint plane; feet on casing mounted at base leve

46、l. Inlet and outlet perpendicular to shaft axis. 15 110 150 Cast iron x 0,30 (- 500) on resulting x 0,35 no no PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 10 Table 2 (end) Family No. and Number of stages 1)General Picture and description Technical limits Material Remarks Coefficients to apply to basic

47、 values Additional possibilities2)Allowable Working Flange DNmax Forces (N) Moment (N.m) Reinforced mounting Other pressure bar Temperature C 7 Multistage Multi-stage; impellers between bearings; vertical joint plane; feet on casing; mounted at centreline level. Inlet and outlet perpendicular to sha

48、ft axis. 40 175 150 Cast steel x 0,72 (- 500) on resulting x 0,84 no no 8.A 3 to 5 stages Muti-stage; impellers between bearings; horizontal joint plane; feet on casing mounted at centreline or base level. Inlet and outlet perpendicular to shaft axis. 150 175 350 Cast steel Equipment in accordance w

49、ith API 610. x 1 x 1 yes yes 8.B 6 to 10 stages x 1 x 0,75 yes yes 8.C 11 to 15 stages x 1 x 0,50 yes yes 1) In family 7, with brackets on ground, divide index by 1,2 or: - Forces: x 0,6; - Moments: (- 500 N.m) on resulting x 0,7. 2) For additional possibilities, see Annex B. PD CEN/TR 13931:2009CEN/TR 13931:2009 (E) 11 5.2 Calculation of maximum permissible forces and moments The basic values