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CEN/TR 13932:2009



The latest, up-to-date edition.

Rotodynamic pumps - Recommendations for fitting of inlet and outlet on piping

Published date


1 Scope
2 Normative references
3 Definitions
4 Minimum installation precautions
  4.1 Pipework components
      4.1.1 Convergent - divergent pipes
      4.1.2 Elbows
      4.1.3 Tees
      4.1.4 Junctions
      4.1.5 Devices to improve flow
  4.2 Valves and fittings
      4.2.1 Stop valves
      4.2.2 Regulating valves
      4.2.3 Check valves (according to EN 12334 and EN 14341)
      4.2.4 Valve accessories

This CEN Technical Report lays down stipulations relating to installation conditions for sudden change in section or direction (elbows, tee fittings, junctions) and the most widely used accessories at the inlet and outlet of pumps (valves and fittings) in order to minimise the effect of disturbances in the flow of liquid thereby created upstream and downstream from the pump and on the operation of the pump.NOTE 1The recommendations given in this document permit to solve a majority of the most current cases.These recommendations relate to three aspects of installation:the fitting of the pump to pipework by convergent and divergent pipes;in the case of elbows, tees and branching, their direction with respect to the axis of the pump;the minimum clearances to be adhered to between a disturbing (elbow, valve, etc.) and the mounting flange of the pump.This document applies to the installation of rot dynamic pumps (centrifugal, mixed flow and axial flow) fitted in piping. It applies to pumps having intake diameters equal to or less than 500 mm. The recommendations may be adapted in agreement with the pump manufacturer for intakes having dimensions exceeding 500 mm or for special applications. This document is not applicable to pumps of which the inlet is located in reservoirs, sumps or tanks and which will be dealt with in a subsequent standard.The recommendations in this document are only valid under the following conditions:Newtonian fluids having a maximum viscosity of 2.10-4 m2/s;occluded gas content at pumping temperature and inlet pressure not exceeding 2 % by volume for water and 4 % for other fluids;solids content (small particle size, such as sand) not exceeding 1 % by volume, nor 1 % by weight;in piping with diameters D1 and D2 (see Figure 11), flow rate velocity, should be in the following ranges:3 m/s to 5 m/s at inlet; 4 m/s to 10 m/s at outlet.

CEN/TC 197
Supersedes CR 13932. (03/2009) Supersedes NBN CR 13932. (07/2011)
Technical Report
Comite Europeen de Normalisation

Standards Relationship
NEN NPR CEN/TR 13932 : 2009 Identical
PD CEN/TR 13932:2009 Identical
UNI CEN/TR 13932 : 2009 Identical
FD CEN/TR 13932 : 2009 FD Identical
S.R. CEN/TR 13932:2009 Identical

ISO 9906:2012 Rotodynamic pumps — Hydraulic performance acceptance tests — Grades 1, 2 and 3
EN 13789:2010 Industrial valves - Cast iron globe valves
EN 1983:2013 Industrial valves - Steel ball valves
EN 13709:2010 Industrial valves - Steel globe and globe stop and check valves
EN 593:2017 Industrial valves - Metallic butterfly valves for general purposes
EN ISO 9906:2012 Rotodynamic pumps - Hydraulic performance acceptance tests - Grades 1, 2 and 3 (ISO 9906:2012)
EN 1984:2010 Industrial valves - Steel gate valves
EN 14341:2006 Industrial valves - Steel check valves
ISO 7194:2008 Measurement of fluid flow in closed conduits — Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
EN 1171:2015 Industrial valves - Cast iron gate valves
EN 736-3:2008 Valves - Terminology - Part 3: Definition of terms
EN 13397:2001 Industrial valves - Diaphragm valves made of metallic materials

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