EN ISO 5198:1998
(Main)Centrifugal, mixed flow and axial pumps - Code for hydraulic performance tests - Precision class (ISO 5198:1987)
Centrifugal, mixed flow and axial pumps - Code for hydraulic performance tests - Precision class (ISO 5198:1987)
Forms the first of a set dealing with tests of pumps and specifies precision class tests (former class A). Engineering class I and class II tests (former classes B and C) will be the subject of a further standard. Defines the terms and quantities that are used and specifies general requirements for tests. Does not specify constructional tolerances.
Kreiselpumpen (Radial-, Halbaxial- und Axialkreiselpumpen) - Regeln für die Messung der hydraulischen Betriebsverhaltens - Präzisionsklasse (ISO 5198:1987)
Pompes centrifuges, hélico-centrifuges et hélices - Code d'essais de fonctionnement hydraulique - Classe de précision (ISO 5198:1987)
Centrifugal, mixed flow and axial pumps - Code for hydraulic performance tests - Precision class (ISO 5198:1987)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2000
Centrifugal, mixed flow and axial pumps - Code for hydraulic performance tests -
Precision class (ISO 5198:1987)
Centrifugal, mixed flow and axial pumps - Code for hydraulic performance tests -
Precision class (ISO 5198:1987)
Kreiselpumpen (Radial-, Halbaxial- und Axialkreiselpumpen) - Regeln für die Messung
der hydraulischen Betriebsverhaltens - Präzisionsklasse (ISO 5198:1987)
Pompes centrifuges, hélico-centrifuges et hélices - Code d'essais de fonctionnement
hydraulique - Classe de précision (ISO 5198:1987)
Ta slovenski standard je istoveten z: EN ISO 5198:1998
ICS:
23.080 ýUSDONH Pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
IS0
INTERNATIONAL STANDARD
First edition
1987-07-O 1
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXflYHAPOflHAfl OPTAHM3A~klfl l-l0 CTAH~APTM3A~MM
Centrifugal, mixed flow and axial pumps - Code for
hydraulic performance tests - Precision class
Code d’essais de fonctionnement
Pompes ten trifuges, h&co-ten trifuges et hklices -
h ydraufique - Classe de prbision
Reference number
IS0 5198: 1987 (E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 5198 was prepared by Technical Committee ISO/TC 115,
Pumps.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organization for Standardization, 1987
Printed in Switzerland
ii
IS0 5198 :I987 (E)
Contents
Page
. . . . I
0 Introduction. . . . . . .
............. 1
1 Scope . . . . . . . . .
. . . . I
2 Field of application . . . . . .
. . . . 2
3 References. . . . . . .
Section one : General recommendations
4 Definitions and symbols . . . . . . . . . . . .
5 Specified duty . . . . . . . . . . . . . . . . . . . .
6 General requirements for tests . . . . . .
Section two : Measurement methods
7 Measurement of rate of flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * . 17
LI
8 Measurement of head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..................................... 38
9 Measurement of speed of rotation
......................................... 38
10 Measurement of power input
........ . . 41
11 Measurement of pump efficiency by the thermodynamic method
.................................................. . .
12 Cavitation tests 51
Annexes
A Estimation and analysis of uncertainties . . . 57
B Comparison of test results with specified duty. . . . 61
C Thermodynamic properties of water and assessment of the accuracy
................ 65
of efficiency measurements by the thermodynamic method
D . 78
Other cavitation tests
E . 80
Frictionlosses.
. . .
III
This page intentionally left blank
INTERNATIONAL STANDARD
IS0 5198 : 1987 (E)
Centrifugal, mixed flow and axial pumps - Code for
hydraulic performance tests - Precision class
0 Introduction This International Standard does not recommend any construc-
tional tolerance nor any global tolerance for acceptance pur-
This International Standard is the first of a set of International poses; it is devoted to specifying and describing procedure and
Standards dealing with performance tests of centrifugal, mixed methods for accurately ascertaining the performance of a pump
flow and axial pumps (in the rest of the text referred to as under the conditions in which it is tested. Contractual
“pumps”). interpretation of the test results must be the subject of a special
agreement between the parties concerned (see annex B).
It specifies precision class tests (former class A). Engineering
class I and class II tests (former classes B and C) will be the Pump performance may be greatly affected by the installation
subject of a further International Standard? conditions, and this must be especially considered when
drawing up the contract if a precision class test is to be carried
The aims of these classes are quite different.
The precision class is mainly used for research, develop-
ment and scientific purposes in laboratories, where an
4 Scope
extremely high accuracy of measurement is important.
This International Standard specifies precision class pe rfor-
The engineering classes are generally applied for acceptance
mance tests for centrifugal, mixed flow and axial pumps.
tests.
It defines the terms and quantities that are used and specifies
In most cases, engineering class II is adequate for acceptance
general requirements for tests. It specifies ways of measuring
tests. The use of engineering class I is restricted to special
the characteristic quantities of the precision class so as
cases when there is a need to have the pump performance
to ascertain the performance of the pump and thus provide a
more precisely defined. However, there may be cases of high
basis for comparison with the performance specified in the
importance, in which even an engineering class I acceptance
contract.
test will be judged inadequate for the precision required for
defining pump performance. In these cases the use of the
The structural details of pumps and the mechanical properties
precision class may exceptionally be necessary for an accep-
of their co mponents lie outside the scope of this I
nternational
tance test.
Standard.
Attention must be paid to the fact that the accuracy required
This International Standard does not specify constructional
for a precision class test significantly increases the test costs by
tolerances, which are purely contractual.
comparison with the costs for an engineering class test.
Precision class tests may not always be practicable, even when
great effort and expense are devoted to measurements. Perfor-
2 Field of application
mance tests to precision class specifications will be required,
and are possible, only in suitable circumstances. Therefore This International Standard gives recommendations for
both the purchaser and the manufacturer shall carefully ex- hydraulic performance testing of centrifugal, mixed-flow and
amine whether the accuracy required for a precision class test axial pumps when these tests have to meet very special require-
might be achieved either on site, on the manufacturer’s test
ments for research, development or acceptance of industrial
bed or in a mutually agreed laboratory. It should be noted that it high-tech. pumps, or when very accurate knowledge of perfor-
may not be possible to guarantee precision class accuracy in
mance characteristics is of prime importance.
advance of the tests.
This International Standard also applies to models and proto-
The purpose of this International Standard is to specify how to types whether the pumps are tested on a test bench or on site if
carry out a test with extremely high precision. installation conditions so permit.
1) At present, they are dealt with in IS0 2548 and IS0 3555.
IS0 5198 : 1987 (E)
It applies IS0 3534, Statistics - Vocabulary and symbols.
-
either to the pu mp itself without fittings, which re-
IS0 3555, Centrifugal, mixed flow and axial pumps - Code for
quires that the pump ends are accessible; or
acceptance tests - Class B.
-
to the whole assembly of pump and of all or part of its
IS0 3846, Liquid flow measurement in open channels by weirs
upstream and downstream fittings, which is the case for
and flumes - Free overfall weirs of finite crest width frec-
pumps with inaccessible ends (submerged pumps, etc.).
tangular broad-crested weirs).
NOTES
IS0 3966, Measurement of fluid flow conduits -
in closed
1 Attention is drawn to the fact that nearly all industrial needs are
Velocity area method using Pitot static tubes.
covered by the codes of acceptance testing of industrial classes I
and II.
I SO 4185, Measurement of liquid flow in closed conduits -
2 Acceptance tests for site and model storage pumps are dealt with in
Weighing method.
IEC Publications 198 and 497.
IS0 4359, Liquid flow measurement in open channels - Rec-
tangular, trapezoidal and U-shaped flumes.
3 References
IS0 4360, Liquid flow measurement in open channels by weirs
IS 0 31, Quantities, units and symbols.
and flumes - Triangular profile weirs.
IS0 555, Liquid flow measurement in open channels - Dilu-
tion methods for measurement of steady flow -
IS0 4373, Measurement of liquid flow In open channels -
Water level measuring devices.
Part 1: Constan t-rate injection method.
Part 2: Integration (sudden injection) method.
IS0 5167, Measurement of fluid flow by means of orifice
plates, nozzles and venturi tubes inserted in circular cross-
Part 3: Cons tan t-ra te injection method and integration
section conduits running full.
method using radioactive tracers.
IS0 1438, Liquid flow measurement in open channels using I S 0 5168, Measurement of fluid flow - Es tima tion of uncer-
tainty of a flow-rate measurement.
thin-plate weirs and venturi flumes.
IS0 1 4381 1, Water flow measurement in open channels using
I SO 7194, Measurement of fluid flow in closed conduits -
weirs and venturi flumes - Part I: Thin-plate weirs.
Velocity-area methods of flow measurement in swirling or
asymmetric flow conditions in circular ducts by means of
IS0 2186, Fluid flow in closed conduits - Connections for
current-meters or Pito t static tubes.
pressure signal transmissions between primary and secondary
elements.
IS0 8316, Measurement of liquid flow in closed conduits -
Method by collection of the liquid in a volumetric tank. l)
IS0 2548, Centrifugal, mixed flow and axial pumps - Code for
acceptance tests - Class C.
IEC Publication 34-2, Rotating electrical machines - Part 2:
Methods for determining losses and efficiency of rotating elec-
IS0 2975, Measurement of water flow in closed conduits -
trical machinery from tests (excluding machines for traction
Tracer methods -
vehicles).
Part I: General.
IEC Publication 41 , In terna tional code for the field acceptance
method using non-
Part 2: Constant injection
tests of hydraulic turbines.
radioactive tracers.
Part 3: Constant rate injection method using radioactive IEC Publication 193, International code for
model acceptance
tracers. tests of hydraulic turbines.
Part 6: Transit time method using non-radioactive tracers.
IEC Publication 198, International code for the field acceptance
tests of storage pumps.
Part 7: Transit time method using radioactive tracers.
IS0 3354, Measurement of clean water flow in closed con- IEC Publication 497, International code for
acceptance
- Velocity-area method using current-meters,
duits tests of storage pumps.
1) At present at the stage of draft.
IS0 5198 : 1987 (E)
Section one : General recommendations
4 Definitions and symbols or the autocorrelation function, I?,, given by the equation
t+ T
4.1 Definitions
R, (t, T) = -
x(t) [x(t + T)] dt
s
T t
For the purposes of this International Standard, the following
definitions apply.
4.1.5 steady and unsteady process: Random process x(t)
is said to be slightly steady or steady in a general sense
when its first order statistical moment (mean ,uJ and its second
order statistical moment [variance OS, or autocorrelation func-
4.1.1 measuring system : System composed of a measuring
tion R, (t, T)] are not dependent on time t, at which the obser-
instrument, including a transducer which picks up physical in-
vation begins nor on the period of time T during which the
formation, and one or several elements in series transmitting or
observation is made.
transforming the resulting signal.
Inversely, when the statistical moments are dependent
Such a system has a response function which can be illustrated on t or
T, the physical phenomenon is said to be u nsteady.
by a gain response or a phase response curve over a frequency
range. In particular, a filtering effect appears between the
When all statistical moments of the process x(t) (beyond the
picked up physical quantity and the observed signal. This filter-
second order), which completely describe the statistical prop-
ing effect is essentially characterized by a cut frequency. In
erty of x(t), are not dependent on t and T, the process is then
most measuring systems which are used, the continuous com-
said to be strongly or strictly steady.
ponent of the signal can pass and the cut frequency is then
strongly related to the response time of the system.
NOTE - From a practical point of view and in this International Stan-
dard, only slightly steady processes are considered (first and second
order statistical moments). It should be noted that when the con-
4.1.2 measuring instrument : Instrument, forming part of a
sidered process follows a normal or Gaussian distribution law, the first
measuring system, which transforms any physical quantity
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.