Rotodynamic pumps - Forces and moments on flanges - Centrifugal, mixed flow and axial flow horizontal and vertical shafts pumps

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 pipework 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 are remote from the installation plane, or to horizontal shaft pumps mounted vertically for installation reasons, such as, fixing to a vertical wall.

Rotodynamische Pumpen - Zulässige Flanschkräfte und Momente - Kreiselpumpen, Halbaxialpumpen und Axialpumpen mit horizontaler und verticaler Achse

Pompes rotodynamiques - Forces et moments applicables aux brides - Pompes centrifuges, hélico-centrifuges et hélices à axes horizontal et vertical

Le présent Rapport Technique CEN fournit des informations pour le calcul des forces et moments maximaux
admissibles autorisés sur les brides de différents types de pompes rotodynamiques à arbres horizontal et
vertical, provoqués par la réaction d’une tuyauterie raccordée de manière rigide à l’installation. Le présent
document ne tient pas compte de l’effet de dispositifs de raccordement élastiques ou déformables, tels que
des soufflets, des raccords élastiques, des raccords glissants autobutés, etc.
Le présent Rapport Technique CEN n’est pas applicable aux pompes multicellulaires monoblocs, dont les
refoulements sont éloignés du plan d’installation, ou aux pompes à axe horizontal montées verticalement pour
des raisons d’installation, telles que, fixation à une paroi verticale.

Centrifugalne črpalke - Sile in momenti na prirobnicah - Centrifugalne, mešane in aksialne črpalke s horizontalnimi in vertikalnimi gredmi

informacije za izračun največjih dovoljenih sil in momentov na prirobnicah različnih vrst centrifugalnih črpalk z vodoravnimi in navpičnimi gredmi, ki nastajajo zaradi povezave s cevovodom, ki je trdno povezan z instalacijami. Ta dokument ne upošteva učinka elastičnih ali deformabilnih povezav, kot so spojke, elastični spoji, samospojni drseči spoji itd..

General Information

Status
Published
Publication Date
20-Jan-2009
Technical Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
21-Jan-2009
Completion Date
21-Jan-2009

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SLOVENSKI STANDARD
SIST-TP CEN/TR 13931:2009
01-april-2009
1DGRPHãþD
SIST CR 13931:2001

&HQWULIXJDOQHþUSDONH6LOHLQPRPHQWLQDSULUREQLFDK&HQWULIXJDOQHPHãDQHLQ

DNVLDOQHþUSDONHVKRUL]RQWDOQLPLLQYHUWLNDOQLPLJUHGPL
Rotodynamic pumps - Forces and moments on flanges - Centrifugal, mixed flow and
axial flow horizontal and vertical shafts pumps
Rotodynamische Pumpen - Zulässige Flanschenkräfte und Momente - Kreiselpumpen,
Halbaxialaufpumpen und Axialpumpen mit horizontaler und verticaler Achse
Pompes rotodynamiques - Forces et moments applicables aux brides - Pompes
centrifuges, hélico-centrifuges et hélices à axes horizontal et vertical
Ta slovenski standard je istoveten z: CEN/TR 13931:2009
ICS:
23.080 ýUSDONH Pumps
SIST-TP CEN/TR 13931:2009 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 13931:2009
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SIST-TP CEN/TR 13931:2009
TECHNICAL REPORT
CEN/TR 13931
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
January 2009
ICS 23.080 Supersedes CR 13931:2000
English Version
Rotodynamic pumps - Forces and moments on flanges -
Centrifugal, mixed flow and axial flow horizontal and vertical
shafts pumps

Pompes rotodynamiques - Forces et moments applicables Rotodynamische Pumpen - Zulässige Flanschenkräfte und

aux brides - Pompes centrifuges, hélico-centrifuges et Momente - Kreiselpumpen, Halbaxialaufpumpen und

hélices à axes horizontal et vertical Axialpumpen mit horizontaler und verticaler Achse

This 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 national 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 13931:2009: E

worldwide for CEN national Members.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
Contents Page

1 Scope .............................................................................................................................................................. 4

2 Normative references .................................................................................................................................... 4

3 Responsibilities of manufacturer and purchaser ....................................................................................... 4

3.1 General ............................................................................................................................................................ 4

3.2 Design considerations .................................................................................................................................. 4

4 Criteria adopted in setting limiting forces and moments .......................................................................... 5

4.1 Shaft-end movement ..................................................................................................................................... 5

4.2 Distortion of the pump casing ...................................................................................................................... 5

4.3 Validity of force and moment values – Effects of materials and temperature ........................................ 5

5 Horizontal shaft pumps ................................................................................................................................. 6

5.1 Definition of pump families and summary of features ............................................................................... 6

5.2 Calculation of maximum permissible forces and moments .................................................................... 11

5.3 Maximum permissible forces and moments on standardised or modular pump families ................... 14

5.3.1 General .......................................................................................................................................................... 14

5.3.2 Composition of forces and moments ........................................................................................................ 14

5.3.3 Possibility of adapting the tables to other pumps of similar design ..................................................... 14

5.4 Other horizontal pump families .................................................................................................................. 14

5.5 Practical considerations for horizontal shaft pumps ............................................................................... 14

6 Vertical shaft pumps ................................................................................................................................... 15

6.1 Definition of pump families and summary of features ............................................................................. 15

6.1.1 Installation types.......................................................................................................................................... 15

6.1.2 Position(s) of flange(s) ................................................................................................................................ 16

6.2 Calculation of maximum permissible forces and moments .................................................................... 19

6.3 Maximum permissible forces and moments on pump flanges ............................................................... 21

6.3.1 General .......................................................................................................................................................... 21

6.3.2 Suspended shaft pumps generally used for transporting water ("for water") ...................................... 21

6.3.3 "In line" pumps ............................................................................................................................................ 22

6.4 Practical considerations for vertical shaft pumps ................................................................................... 22

Annex A (informative) Horizontal shaft pumps - Calculation of forces and moments for reinforced

and/or concrete mountings for families 2, 3.B, 3.C, 5.A, 5.B, 6, 7 and 8 ................................................ 23

Annex B (informative) Specifications relating to additional possibilities ......................................................... 24

B.1 General .......................................................................................................................................................... 24

B.2 Horizontal pumps only ................................................................................................................................ 24

B.2.1 Pump stopped .............................................................................................................................................. 24

B.2.2 Reinforced and/or concrete mounting ...................................................................................................... 24

B.3 Horizontal and vertical pumps ................................................................................................................... 27

B.3.1 Prestressing on the pipework .................................................................................................................... 27

B.3.2 Weighting or compensation formula ......................................................................................................... 27

B.3.3 Limit of accumulation of possibilities ....................................................................................................... 28

Bibliography .............................................................................................................................................................. 29

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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
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.

Attention 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 room for the inclusion of additional types if required at a later

date:
 horizontal shaft pumps: N° 1 to 8 ;
 vertical shaft pumps: N° 20 to 36 .
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 families of pumps.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
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

pipework 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 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 edition 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 centrifugal 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 applied 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, 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 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 motor 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 coupling is used, increase its rate of wear.

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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)

 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 of

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.

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 pump Families Shaft-end diameter Displacement
(mm) (mm)
Standard (N) 1A, 1B < 30 (N24) 0,15
Modular 3A 31-40 (N32) 0,20
4A, 4B > 40 (N42) 0,25
Other horizontal 2, 3B, 3C 0,125
≤ 50
Pumps 5A, 5B > 50 0,175
6, 7, 8A, 8B, 8C 0,175
> 50
Vertical pumps All All 0,150
(20A-36B)
4.2 Distortion of the pump casing

It is the responsibility 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, whichever 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 other materials and higher temperatures,

the values shall be corrected by applying the modulus of elasticity relation, namely:

20b
where
E modulus of elasticity of the basic material at 20 °C
20b
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
E modulus of elasticity of the selected material at temperature t °C
t.m

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 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 those in Table 2 should be subject to agreement between the parties

concerned.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
Table 2 — Characteristics of horizontal pump families
Coefficients to
Additional
Family Technical limits apply to basic
possibilities
No. and General Picture and Material Remarks values
Number description
Allowable Working
Flange
of Forces Moment Reinforced Other
max
pressure Temperature
stages
(N) (N.m) mounting
bar °C
1.A
10 110 200 Cast iron x 0,50 X 0,50 yes no
1 stage (Outlet)
Dimensions
accordance
1.B
with
16 250 200 Cast x 1 x 1 yes no
Single stage, overhung EN 22858.
1 stage (Outlet) steel
bearing frame; feet on
casing; mounted at
base level.
Axial inlet; outlet
vertical on pump
centreline.
10 110 500 Cast iron x 0,40 x 0,40 yes no
1stage
Pump
3.A similar to
30 300 200 Cast EN 22858 x 1,2 x 1,2 yes no
(Outlet) steel but with
1 stage casing
mounted at
centreline
level.
Single stage, overhung
bearing frame; feet on
casing; mounted at
centreline level.
Axial inlet; outlet
vertical on pump
centreline.
3.B
Equipment
1 stage 55 430 350 Cast in x 0,85 (- 500) yes yes
or steel accordance on every
2 stages with API axis x 1
610.
Single or two stage,
overhung bearing
frame; feet on casing;
mounted at centreline
level.
Axial or overhead inlet;
outlet vertical.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
Table 2 (continued)
Coefficients to
Additional
Family Technical limits apply to basic
possibilities
No. and General Picture and values
Number description Material Remarks
Allowable Working
Reinforce
Flange
of Forces Moment Other
pressure Temperature
max
stages
(N) (N.m)
mounting
bar °C
3.C Equipment
in
1 stage 55 530 450 Cast accordance x 1 x 1 yes yes
steel with API
610.
Single stage, impeller
between bearings; feet
on casing; mounted at
centreline level.
Inlet vertical; outlet
vertical.
4.A Cast iron x 0,35 x 0,35 yes no
10 110 200
Single stage, overhung
bearing frame; feet on
bearing frame;
Cast x 0,60 x 0,60 yes no
mounted at base level.
4.B steel
Axial inlet; outlet
vertical on pump
centreline or tangential.
5.A
1 stage
Single or two stage;
or 20 110 600 Cast iron x 0,40 x 0,30 no no
2 stages impeller between
bearings; horizontal
joint plane; feet on
casing; mounted at
base level.
Inlet and outlet
perpendicular to shaft
axis.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
Table 2 (continued)
Coefficients to
Additional
Family Technical limits
apply to basic 2)
possibilities
No. and General Picture and Material Remarks
values
Number description
Flange
Allowable Working
max
Forces Moment Reinforced Other
stages pressure Temperature
(N) (N.m) mounting
bar °C
5.B Equipment
in
120 175 450 Cast accordance x 1 x 1 yes yes
steel with API
1 stage 610.
2 stages
Single or two stage;
impeller between
bearings; horizontal
joint plane; feet on
casing; mounted at
base level.
Inlet and outlet
perpendicular to shaft
axis.
Multi- 15 110 150 Cast iron x 0,30 (- 500) no no
stage on
resulting
x 0,35
Multi-stage; impellers
between bearings;
vertical joint plane; feet
on casing mounted at
base level.
Inlet and outlet
perpendicular to shaft
axis.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
Table 2 (end)
Coefficients to
Additional
Family Technical limits
apply to basic 2)
possibilities
No. and General Picture and
values
Number description Material Remarks
Allowable Working
of stages
Flange
Forces Moment Reinforced Other
pressure Temperature
max
(N) (N.m) mounting
bar °C
40 175 150 Cast x 0,72 (- 500) no no
steel on
resulting
Multi-stage; impellers
Multistage x 0,84
between bearings;
vertical joint plane; feet
on casing; mounted at
centreline level.
Inlet and outlet
perpendicular to shaft
axis.
8.A
3 to 5 x 1 x 1 yes yes
stages
Equipment
Muti-stage; impellers in
8.B
between bearings;
Cast accordance
6 to 10 horizontal joint plane; 150 175 350 steel with API x 1 x 0,75 yes yes
stages feet on casing mounted 610.
at centreline or base
level.
Inlet and outlet
8.C
perpendicular to shaft
axis.
11 to 15 x 1 x 0,50 yes yes
stages
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.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
5.2 Calculation of maximum permissible forces and moments

The basic values are given in Tables 3 or 4 depending on the pump family. These values are given for normal

operation of the pump and are valid for conventional mounting.

The maximum permissible forces and moments are calculated by applying to the basic values the coefficients as

given in Table 2 for the pump family.

It should be noted that the maximum forces and moments derived from basic values in Table 3 are applied in a

different manner to those derived from Table 4. See 5.3 and 5.4.

In some cases, there are additional possibilities which allow an increase in the maximum values of forces and

moments to be offered. These are described in Annex B.
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)

Table 3 – Basic values of force and moments for horizontal pumps – Conventional mounting (pump

families 1.A, 1.B, 3.A, 4.A and 4.B)
Forces (N) Moments (N.m)
DN DN DN
Inlet Outlet Impeller
1) 2)
F F ∑∑ M
Key v h ∑∑∑∑ F ∑∑ t
1 shaft
9,5 50 32 125 2 500 1 900 3 150 400
Axial inlet. 8 50 32 160 2 500 1 900 3 150 350
8 50 32 200 2 500 1 900 3 150 350
10 50 32 250 2 500 1 900 3 150 400
Vertical 12 65 40 50 125 2 700 2 000 3 350 450
outlet on 11 65 40 50 160 2 700 2 000 3 350 450
axis of pump. 10,5 65 40 200 2 700 2 000 3 350 400
14 65 40 250 2 700 2 000 3 350 500
13 65 40 315 2 700 2 000 3 350 500
16 80 50 65 125 2 900 2 100 3 600 550
16 80 50 65 160 2 900 2 100 3 600 550
14 80 50 200 2 900 2 100 3 600 600
18,5 80 50 250 2 900 2 100 3 600 650
17,5 80 50 315 2 900 2 100 3 600 650
25 100 65 80 125 3 600 2 500 4 400 900
27 100 65 80 160 3 600 2 500 4 400 950
25,5 100 65 200 3 600 2 500 4 400 900
25,5 100 65 250 3 600 2 500 4 400 900
27 100 65 315 3 600 2 500 4 400 950
38 125 80 160 5 000 3 100 5 900 1 400
34 125 80 200 4 500 2 900 5 350 1 200
34,5 125 80 250 4 500 2 900 5 350 1 250
35 125 80 315 4 500 2 900 5 350 1 250
39,5 125 80 400 5 100 3 150 6 000 1 450
49 125 100 200 6 400 3 800 7 450 1 900
50,5 125 100 250 6 600 4 000 7 700 2 050
48 125 100 315 6 200 3 700 7 200 1 850
44 125 100 400 5 700 3 400 6 650 1 650
67,5 150 125 250 9 000 5 800 10 700 3 100
63 150 125 315 8 300 5 200 9 700 2 800
62 150 125 400 8 200 5 100 9 650 2 750
74 200 150 250 10 000 6 500 11 950 3 500
74 200 150 315 10 000 6 500 11 950 3 500
74 200 150 400 10 000 6 500 11 950 3 500
1)   +  ≤
F F F
z out z in v
(out = outlet, in = inlet)
2 2 2 2
2) + + + ≤ .
F F F F
x in y in x out y out
2 2 2 2 2 2
3) + + + + + ≤ .
M M M M M M
x in y in z in x out y out z out
mass (kg) × DN out
4) A =
D impeller (mm)
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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)

Table 4 – Basic values of force and moments for horizontal pumps – Conventionnal mounting (Pump

families 2, 3.B, 3.C, 5.A, 5.B, 6, 7, 8.A, 8.B and 8.C)
Forces (N) Moments (N.m)
Flanges
F F F M M M
Key y z x ∑∑∑∑ F y z x ∑∑∑∑ M
1 shaft
40 1 000 1 250 1 100 1 950 900 1 050 1 300 1 900
50 1 350 1 650 1 500 2 600 1 000 1 150 1 400 2 050
80 2 050 2 500 2 250 3 950 1 150 1 300 1 600 2 350
Horizontal 100 2 700 3 350 3 000 5 250 1 250 1 450 1 750 2 600
pump 150 4 050 5 000 4 500 7 850 1 750 2 050 2 500 3 650
200 5 400 6 700 6 000 10 450 2 300 2 650 3 250 4 800
Top branch 250 6 750 8 350 7 450 13 050 3 150 3 650 4 450 6 550
300 8 050 10 000 8 950 15 650 4 300 4 950 6 050 8 900
z-Axis 350 9 400 11 650 10 450 18 250 5 500 6 350 7 750 11 400
400 10 750 13 300 11 950 20 850 6 900 7 950 9 700 14 300
450 12 100 14 950 13 450 23 450 8 500 9 800 11 950 17 600
500 13 450 16 600 14 950 26 050 10 250 11 800 14 450 21 300
550 14 800 18 250 16 450 28 650 12 200 14 050 17 100 25 300
600 16 150 19 900 17 950 31 250 14 400 16 600 20 200 29 900
40 1 250 1 000 1 100 1 950 900 1 050 1 300 1 900
50 1 650 1 350 1 500 2 600 1 000 1 150 1 400 2 050
80 2 500 2 050 2 250 3 950 1 150 1 300 1 600 2 350
Horizontal 100 3 350 2 700 3 000 5 250 1 250 1 450 1 750 2 600
pump 150 5 000 4 050 4 500 7 850 1 750 2 050 2 500 3 650
200 6 700 5 400 6 000 10 450 2 300 2 650 3 250 4 800
Side branch 250 8 350 6 750 7 450 13 050 3 150 3 650 4 450 6 550
300 10 000 8 050 8 950 15 650 4 300 4 950 6 050 8 900
y-Axis 350 11 650 9 400 10 450 18 250 5 500 6 350 77 500 11 400
400 13 300 10 750 11 950 20 850 6 900 7 950 9 700 14 300
450 14 950 12 100 13 450 23 450 8 500 9 800 11 950 17 600
500 16 600 13 450 14 950 26 050 10 250 11 800 14 450 21 300
550 18 250 14 800 16 450 28 650 1 220 14 050 17 100 25 300
600 19 900 16 150 17 950 3 125 14 400 16 600 20 200 29 900
40 1 100 1 000 1 250 1 950 900 1 050 1 300 1 900
50 1 500 1 350 1 650 2 600 1 000 1 150 1 400 2 050
80 2 250 2 050 2 500 3 950 1 150 1 300 1 600 2 350
Horizontal 100 3 000 2 700 3 350 5 250 1 250 1 450 1 750 2 600
Pump 150 4 500 4 050 5 000 7 850 1 750 2 050 2 500 3 650
200 6 000 5 400 6 700 10 450 2 300 2 650 3 250 4 800
End branch 250 7 450 6 750 8 350 13 050 3 150 3 650 4 450 6 550
300 8 950 8 050 10 000 15 650 4 300 4 950 6 050 8 900
x-Axis 350 10 450 9 400 11 650 18 250 5 500 6 350 7 750 11 400
400 11 950 10 750 13 300 20 850 6 900 7 950 9 700 14 300
450 13 450 12 100 14 950 23 450 8 500 9 800 11 950 17 600
500 14 950 13 450 16 600 26 050 10 250 11 800 14 450 21 300
550 16 450 14 800 18 250 28 650 12 200 14 050 17 100 25 300
600 17 950 16 150 19 900 31 250 14 400 16 600 20 200 29 900

1) For DN exceeding 600, agreement is to be reached between purchaser and manufacturer/supplier on the values of forces and moments.

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SIST-TP CEN/TR 13931:2009
CEN/TR 13931:2009 (E)
5.3 Maximum permissible forces and moments on standardised or modular pump
families
5.3.1 General
This applies to all pump families with basic values obtained from Table 3.

The values for forces and moments apply to all pump flanges all together and not to each flange separately.

Maximum permissible deformations are given in Table 1.
5.3.2 Composition of forces and moments

Whatever the direction of application of the forces and moments and their distribution on the pump flanges, the

maximum permissible values remain within the framework of the following formula:
2 2 2
     
Σ  Σ  Σ 
F F M
v h t
     
+ + ≤ 1
     
max max max
F F M
v h t
     
F max, F max, M max being the values given by the tables;
v h t

∑F , ∑F , ∑M, being the algebric sums of the absolute values of the actual (or applied) loads to the

v h t
pump flanges.

These sums do not take account of the direction of the stresses or of the distribution

on each flange.

NOTE This formulation leaves the user completely free as regards the distribution of the various loads on the pump

flanges, in the knowledge that the maximum value for each of the loads cannot be achieved simultaneously.

5.3.3 Possibility of adapting the tables to other pumps of similar design

The maximum permissible values on flanges are tabulated in Annex B of EN ISO 5199:2002 for many pump families

according to their dimensions and conditions of installation.

If any pumps have no characteristics mentioned in these tables, the manufacturer/supplier is authorized to consider

them as similar in one of the families of his choice, either a particular agreement should be signed between the buyer

and the manufacturer/supplier for every particular case.
5.4 Other horizontal pump families
This applies to all pump families with basic values obtained from Table 4.
The values for maximum forces and moments apply to each flange taken separately.
5.5 Practical considerations for horizontal shaft pumps

A pump is not a static unit attached to pipework, but a precision machine, inside which a moving part turns at high

speed, and which has tight clearances and high precision sealing devices as mechanical fittings. It is, therefore

important, to stay below the maximum load
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