EN 23954:1993

Powders for powder metallurgical purposes - Sampling (ISO 3954:1977)

Deals with the safety of hand-held motor-operated or magnetically driven electric tools, specific requirements for screwdrivers and impact wrenches. The rated voltage being not more than 250 V for single-phase a.c. or d.c., and 440 V for three-phase a.c. tools.

Pulver für die Pulvermetallurgie - Probenahme (ISO 3954:1977)

Diese internationale Norm behandelt die Probenahme von Pulvern für pulvermetallurgische Zwecke. Sie umfasst ausserdem die Teilung der entnommenen Proben in für Versuche erforderliche Mengen.

Poudres pour l'emploi en métallurgie des poudres - Echantillonnage (ISO 3954:1977)

S'applique aux outils portatifs à moteur électrique ou à entraînement magnétique, règles particulières pour les visseuses et les clés à chocs.  La tension assignée des outils n'étant pas supérieure à 250 V pour les outils à  courant monophasé alternatif  ou continu et à 440 V pour les outils  à courant alternatif triphasé.

Powders for powder metallurgical purposes - Sampling (ISO 3954:1977)

General Information

• Status: Withdrawn
• Publication Date: 06-Apr-1993
• Withdrawal Date: 31-Aug-2007
• ICS: 77.160 - Powder metallurgy
• Technical Committee: CEN/SS M11 - Powder metallurgy
• Drafting Committee: CEN/SS M11 - Powder metallurgy
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Sep-2007
• Completion Date: 01-Sep-2007
• Ref Project: SIST EN 23954:2000 - Powders for powder metallurgical purposes - Sampling (ISO 3954:1977)

Relations

• Replaced By: EN ISO 3954:2007 - Powders for powder metallurgical purposes - Sampling (ISO 3954:2007)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 23954:2000
01-december-2000
Powders for powder metallurgical purposes - Sampling (ISO 3954:1977)
Powders for powder metallurgical purposes - Sampling (ISO 3954:1977)
Pulver für die Pulvermetallurgie - Probenahme (ISO 3954:1977)
Poudres pour l'emploi en métallurgie des poudres - Echantillonnage (ISO 3954:1977)
Ta slovenski standard je istoveten z: EN 23954:1993
ICS:
77.160 Metalurgija prahov Powder metallurgy
SIST EN 23954:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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INTERNATIONAL STANDARD
3954
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXAYHAPOJJHA(I OPl-AHM3ALViJi l-IO CTAH~APTM3A~WM~ORGANISATION INTERNATIONALE DE NORMALISATION
Powders for powder metallurgical purposes - Sampling
Poudres pour emploi en m&allurgie des poudres - Echan tillonnage
First edition - 1977-02-15
w
-
UDC 621.762 : 669-492.2 : 620.113 Ref. No. ISO 3954-1977 (E)
Descriptors : powder metallurgy, metal powder, sampling, tests.
Price based on 5 pages

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FOREWC9RD
ISO (the International Organization for Standardization) is a worldwide federation
of national Standards institutes (ISO member bodies). The work of developing
International Standards is carried out through ISO technical committees. Every
member body interested in a subject for which a technical committee has been set
up has the right to be represented on that committee. International organizations,
governmentai and non-governmental, in Liaison with ISO, also take part in the work.
Draft International Standards adopted by the technicaf committees are circufated
to the member bodies for approval before their acceptance as International
Standards by the ISO Council.
International Standard ISO 3954 was developed by Technicai Committee
ISO/TC 119, Powder metalhrgical materials and produets, and was circulated
to the member bodies in October 1975.
It has been approved by the member bodies sf the following countries :
Austria Japan Turkey
Canada Mexico United Mingdom
Czechoslovakia Poland
U.S.A.
Egypt, Arab Rep. of Portugal U.S.S. R.
Romania
France Yugoslavia
Germany Spain
Italy Sweden
No member body expressed disapproval sf the document.
0 International Organkation for Standardkation, 1977 @
Printed in Switzeriand

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ISO 3954-1977 (E)
INTERNATIONAL STANDARD
Povvders for powder metallurgical purposes - Sampling
3.2 increment : A quantity of powder obtained by a
1 SCOPE AND FIELD OF APPLICATION
sampling device at one time from a Single lot.
This International Standard specif ies procedures for the
sampling of powders for powder metallurgical purposes.
3.3 gross Sample : The quantity of powder consisting of
lt also covers the splitting of the Sample into the quantity
all the increments taken from a Single lot.
required for testing.
3.4 composite Sample : The blended entire gross Sample
or a representative part thereof. Alternatively it may be
2 REFERENCES
obtained by splitting the lot. However it is obtained, it
should be thoroughly blended.
ISO 78, Guide on the form for Standards for Chemical
products and for methods of Chemical anaiysis.
3.5 test Sample : A quantity of powder taken from the
ISO 3081, lron ores - lncremen t sampling - Manual
composite Sample for determining a Single property or for
method.
preparing the test pieces. lt should normally be taken by
splitting the composite Sample.
3 DEFINITIONS
3.5.1 test Portion : A definite quantity of powder drawn
from the test Sample (or, if both are the Same, from the
The following definitions are in accordance with ISO 3081
composite Sample) and on which the test is carried out.
and ISO 78.
3.5.2 test piece : An Object of specified form prepared
3.1 lot : A quantity of powder processed or produced
from a test Sample.
under conditions which are presumed uniform.

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ISO 39544977 (E)
Lot
Increments
Gross sample
(BIending)
Composite sample
1
I
,
. )
Property Property
Property
Test samples
B C
A
, .
,
rl-j l-1 r1 1 Test pieces
Test portions
I .
(Determination)
-
FIGURE 1 Scheme of sampling
4 NUMBER OF INCREMENTS
Number of Containers from
Number of Containers in
which increments shall be taken
the lot
4.1 Sampling from powders packaged in Containers
lt0 5 all
Unless otherwise agreed, the number of Containers listed
5
6to 11
in the table shall be selected at random from the lot when
20 6
12to
samples are taken from powder packaged in Containers. One 21 to 35 7
or more increments shall be taken from every selected
36 to 60 8
Container to provide a gross Sample. If Containers holding
61 to 99 9
different quantities are included in the lot, the Containers
100 to 149 10
selected shall be representative of the lot and the number
11
150 to 199
of increments taken from every selected Container shall be
12
200 to 299
in Proportion to the content of the Container.
13
300 to 399
For every additional 100 Containers or Portion thereof in the lot,
4.2 Sampling during discharge in continuous stream
one additional Container shall be sampled.
crements shall depend on the accuracy desired. At least
If the entire lot ’
...