SIST EN ISO 4519:2016
(Main)Electrodeposited metallic coatings and related finishes - Sampling procedures for inspection by attributes (ISO 4519:1980)
Electrodeposited metallic coatings and related finishes - Sampling procedures for inspection by attributes (ISO 4519:1980)
This International Standard establishes sampling plans and procedures for inspection by attributes of electrodeposited metallic coatings. It may be applied to related finishes by agreement between the supplier and the purchaser. It is based on ISO 2859 (see also Addendum 1 to ISO 2859).
The sampling plans in this International Standard are applicable, but not limited, to the inspection of end items, components, materials in process and finished products in storage. The plans are intended primarily to be used for a continuing series of lots, but they may also be used for the inspection of isolated lots. However, the assurance given for isolated lots is lower than that given for a continuing series of lots.
This International Standard is not applicable to the sampling and testing of mechanical fasteners having electrodeposited metallic coatings or related finishes, in all the circumstances for which procedures for these components are specified in ISO 3269.
The sampling plans given in this International Standard are based on AQLs1) of 1,5 and 4,0 %. Other AQLs may be used if specified in the product specification, in which case reference should be made to ISO 2859 and its Addendum 1.
It is also possible to formulate sampling plans based on inspection by variables.
Elektrolytisch abgeschiedene metallische Überzüge und verwandter Finishs - Stichprobenverfahren zur Qualitätskontrolle (ISO 4519:1980)
Dépôts électrolytiques et finitions apparentées - Méthodes d'échantillonnage pour le contrôle par attributs (ISO 4519:1980)
Galvansko nanašanje kovinskih in sorodnih prevlek - Naključno vzorčenje za kontrolo kakovosti (ISO 4519:1980)
Ta mednarodni standard vzpostavlja načrte in postopke vzorčenja za kontrolo galvanskih nanosov kovinskih prevlek po opisnih spremenljivkah. Uporablja se lahko za sorodne prevleke po dogovoru med dobaviteljem in kupcem. Temelji na standardu ISO 2859 (glej tudi dodatek 1 k standardu ISO 2859). Načrti vzorčenja v tem mednarodnem standardu se med drugim uporabljajo za kontrolo končnih izdelkov, komponent ter materialov v predelanih in končnih skladiščenih izdelkih. Načrti so namenjeni predvsem za uporabo v trajnih sklopih serij, vendar se lahko uporabljajo tudi za kontrolo izoliranih sklopov. Vendar je zagotovilo za izolirane sklope manjše od tistega za trajne sklope serij. Ta mednarodni standard se ne uporablja za vzorčenje in preskušanje mehanskih veznih elementov z galvanskim nanosom kovinskih ali sorodnih prevlek v vseh okoliščinah, katerih postopki za te komponente so določeni v standardu ISO 3269. Načrti vzorčenja v tem mednarodnem standardu temeljijo na 1,5- in 4-odstotni prevzemni meji kakovosti1). Druge prevzemne meje kakovosti se lahko uporabljajo, če so določene v specifikaciji izdelka, pri čemer je treba upoštevati standard ISO 2859 in dodatek 1 tega standarda. Poleg tega je načrte vzorčenja mogoče oblikovati tudi na podlagi kontrole po številskih spremenljivkah.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 4519:2016
01-julij-2016
1DGRPHãþD
SIST ISO 4519:1999
*DOYDQVNRQDQDãDQMHNRYLQVNLKLQVRURGQLKSUHYOHN1DNOMXþQRY]RUþHQMH]D
NRQWURORNDNRYRVWL ,62
Electrodeposited metallic coatings and related finishes - Sampling procedures for
inspection by attributes (ISO 4519:1980)
Elektrolytisch abgeschiedene metallische Überzüge und verwandter Finishs -
Stichprobenverfahren zur Qualitätskontrolle (ISO 4519:1980)
Dépôts électrolytiques et finitions apparentées - Méthodes d'échantillonnage pour le
contrôle par attributs (ISO 4519:1980)
Ta slovenski standard je istoveten z: EN ISO 4519:2016
ICS:
25.220.40 Kovinske prevleke Metallic coatings
SIST EN ISO 4519:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 4519:2016
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SIST EN ISO 4519:2016
EN ISO 4519
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2016
EUROPÄISCHE NORM
ICS 25.220.40
English Version
Electrodeposited metallic coatings and related finishes -
Sampling procedures for inspection by attributes
(ISO 4519:1980)
Dépôts électrolytiques et finitions apparentées - Elektrolytisch abgeschiedene metallische Überzüge
Méthodes d'échantillonnage pour le contrôle par und verwandter Finishs - Stichprobenverfahren zur
attributs (ISO 4519:1980) Qualitätskontrolle (ISO 4519:1980)
This European Standard was approved by CEN on 2 April 2016.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4519:2016 E
worldwide for CEN national Members.
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SIST EN ISO 4519:2016
EN ISO 4519:2016 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 4519:2016
EN ISO 4519:2016 (E)
European foreword
The text of ISO 4519:1980 has been prepared by Technical Committee ISO/TC 107 “Metallic and other
inorganic coatings” of the International Organization for Standardization (ISO) and has been taken over
as EN ISO 4519:2016 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2016, and conflicting national standards shall
be withdrawn at the latest by October 2016.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4519:1980 has been approved by CEN as EN ISO 4519:2016 without any modification.
3
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SIST EN ISO 4519:2016
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SIST EN ISO 4519:2016
International Standard
INTERNATIONAL ORkANlZATlON FOR STANDARDIZATlON.ME)I(LZYHAPOflHAR OPrAHM3Al#lfl IlO CTAH~APTI43A~WWORGANlSATlON INTERNATIONALE DE NORMALISATION
Electrodeposited metallic coatings and related finishes -
Sampling procedures for inspection by attributes
D&p6 ts Alec troly tiques et finitions apparent&es - M&bodes d%chanti!lonnage pour le cont&e par attributs
First edition 1980-07-15
U DC 669.056 : 621357.7 : 620.113 Ref. No. IS0 4519-1980 (E)
electrodeposited coatings, electrodeposition, definitions, sampling,
Descriptors : metal coatings, sampling tables (plans), quality control,
inspection by attributes.
Price based on 10 pages
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SIST EN ISO 4519:2016
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Inter-
national Standards is carried out through IS0 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, governmental
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.
International Standard IS0 4519 was developed by Technical Committee ISO/TC 107,
Meta//ic and other non-organic coatings, and was circulated to the member bodies in
March 1979.
It has been approved by the member bodies of the following countries :
Bulgaria Israel South Africa, Rep. of
Canada Italy Spain
Czechoslovakia Japan Sweden
France Korea, Rep, of Switzerland
Germany, F. R. Libyan Arab Jamahiriya Turkey
Hungary
Poland United Kingdom
India Romania USA
The member body of the following disapproval of the document on
country expressed
technical grounds
Netherlands
0 International Organization for Standardization, 1980
Printed in Switzerland
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SIST EN ISO 4519:2016
INTERNATIONAL STANDARD IS0 4519-1980 (E)
Electro ’deposited metallic coatings and related finishes -
Sampling procedures for inspection by attributes
1 Scope and field of application 3 Definitions
This International Standard establishes sampling plans and
NOTE - Some of these definitions are not identical with those in
IS0 3534 but have been modified to make them easier to understand
procedures for inspection by attributes of electrodeposited
by non-statisticians and to make them more readily applicable to elec-
metallic coatings. It may be applied to related finishes by
troplated thems.
agreement between the supplier and the purchaser. It is based
on IS0 2859 (see also Addendum 1 to IS0 2859).
3.1 inspection : The process of measuring, examining,
The sampling plans in this International Standard are testing, or otherwise comparing the unit of product (see 3.4)
applicable, but not limited, to the inspection of end items, with the requirements.
components, materials in process and finished products in
storage. The plans are intended primarily to be used for a
3.2 attribute : A characteristic or property which is
continuing series of lots, but they may also be used for the
appraised in terms of whether it does or does not exist (for
inspection of isolated lots. However, the assurance given for
example go or no-go) with respect to a given requirement.
isolated lots is lower than that given for a continuing series of
lots.
33 inspection by attribute(s) : Inspection whereby either
the unit of product is simply classified as defective or non-
This International Standard is not applicable to the sampling
defective, or the number of defects in the unit of product is
and testing of mechanical fasteners having electrodeposited
counted, with respect to one or more given requirements.
metallic coatings or related finishes, in all the circumstances for
which procedures for these components are specified in
IS0 3269.
34 . unit of product : The object inspected either to deter-
mine its classification as defective or non-defective, or to count
The sampling plans given in this International Standard are
the number of defects. It may be a single article, a pair, a set, a
based on AQLsl) of 1,5 and 4,0 %. Other AQLs may be used if
length, an area, an operation, a volume, a component of an
specified in the product specification, in which case reference
end item or the end product itself. The unit of product may or
should be made to IS0 2859 and its Addendum 1.
may not be the same as the unit of purchase, supply, produc-
tion, or shipment.
It is also possible to formulate sampling plans based on
inspection by variables.
3.5 acceptance number : The maximum number of defects
or defective units in the sample that will permit acceptance of
the inspection lot.
2 References
3.6 rejection number : The minimum number of defects or
defective units in the sample that will cause rejection of the in-
I S 0 2859, Sampling procedures and tables for inspection by at-
spection lot.
tributes.
. inspection lot : A collection of coated articles that-are
IS0 2859lAdd. 1, Genera/information on sampling inspection, 37
and guide to the c/se of the /SO 28s tables. of the same kind, that’ have been produced to the same
specifications, that have been coated by a single supplier at one
IS0 3269, Fasteners - Acceptance inspection. 2) time, or at approximately the same time, under essentially iden-
tical conditions and that are submitted for acceptance or rejec-
- Vocabulary and symbols. tion as a group.
IS0 3534, Statistics
1) AQL = Acceptable Quality Level.
2) At present at the stage of draft.
1
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SIST EN ISO 4519:2016
IS0 45194980 (E)
3.8 Classification of defects and defectives
defective units of product divided by the total number of units
of product inspected, i.e.
3.8.1 method of classifying defects : The enumeration of
number of units inspected
possible defects of the unit of product classified according to
Percent defective = x 100
number of defectives
their seriousness. A defect is any non-conformance of the unit
of product to the specified requirements.
Defects are normally grouped into one or more of the following 4 Product submission
classes; however, defects may be grouped into other classes or
into sub-classes within these classes. 4.1 Lot
An inspection lot shall be a collection of items from which a
3.8.1.1 critical defect : A defect that judgement and ex-
sample shall be randomly drawn and inspected to determine
perience indicate is likely to result in hazardous or unsafe con-
conformance with the acceptance criteria. It may differ from a
ditions for the individual using, maintaining, or depending upon
collection of units of product designated as a lot for other pur-
the unit of product which has an electrodeposited metallic
poses, such as production, shipment, and storage.
coating or related finish. It may also be a defect in the coating
that judgement and experience indicate is likely to prevent per-
formance of the primary function of a major end item. 4.2 Formation of lots
The product shall be assembled into identifiable lots, sub-lots,
3.8.1.2 major defect : A defect, other than critical, that is
or in such manner as may be prescribed (see 6.3). Each lot
likely to result in failure of the finish, or to reduce materially the
shall, as far as practicable, consist of units of product or
usability of the unit of product for its intended purpose.
separate specimens of the same basic material composition, of
a single type, grade or class of the coating or finish, and ap-
3.8.1.3 minor defect : A defect that is not likely to reduce
proximately the same size and shape, processed under essen-
materially the usability of the unit of product for its intended
tially the same conditions, and at essentially the same time (see
purpose, or is a departure from established standards having
7.2.2).
little or no bearing on the effective use or operation of the item
which has an electrodeposited coating or related finish.
4.3 Lot size
NOTE - Inspection for detection of critical defects may require non-
The lot size is the number of units of product in a lot.
destructive examination of every unit of product in the lot. In this Inter-
national Standard, all defects not conforming to the specified re-
quirements in the product item specifications for electrodeposited
4.4 Presentation of lots
coatings and related finishes are considered to be major. If specified by
the purchaser, the maximum number of defects per hundred items, or
Unless specified by the purchaser in the contract or order, the
the maximum percent defective laid down in this International Stan-
formation of lots, the lot size and the manner in which the lot is
dard can be increased for the purpose of sampling inspection of minor
to be presented and identified shall be designated by the sup-
defects.
plier.
3.8.2 method of classifying defectives : A defective is a
unit of product which contains one or more defects. 5 Acceptance and rejection
Defectives are usually classified as follows : 5.1 Responsibility for tests
Unless otherwise specified in the contract or purchase order,
3.8.2.1 critical defective : A defective which contains one
the supplier shall be responsible for performing all the required
or more critical defects, and which may contain major or minor
tests for compliance with the specified inspection re-
defects.
quirements, and the supplier may use his own or any other
laboratory facilities suitable for performance of the inspection
3.8.2.2 major defective : A defective which contains one or
requirements. The purchaser shall have the right to perform
more major defects, and which may contain minor defects but
any of the inspections detailed in the material document, when
no critical defects.
such action is deemed necessary to ensure that the elec-
trodeposited metallic coating or the related finish conforms to
the prescribed requirements. Reports of the test results shall be
3.8.2.3 minor defective : A defective which contains one or
available for examination by the purchaser for 1 year from the
more minor defects, but no critical or major defects.
date of acceptance of the material by him. Copies of the test
reports and test details shall be furnished when required by the
contract or purchase order.
3.9 expression of non-conformance : The extent of non-
conformance of a product expressed either in terms of percent
defective, or in terms of defects per hundred items.
5.2 Acceptability of lots
determi ned by the use of a sampl-
Acceptabi lity of a lot shall be
3.10 percent defective : One hundred times the number of
ing plan.
2
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SIST EN ISO 4519:2016
IS0 45194980 (El
5.3 Defective items 6.4 Time of sampling
The purchaser shall have the right to reject any unit of product Samples may be drawn after all the units comprising the lot
found defective during inspection, whether that unit of product have been assembled, or during assembly of the lot.
,
forms part of a sample or not, and whether the lot as a whole is
accepted or rejected. With the approval of, and in the manner
specified by the purchaser, rejected items may be repaired or
corrected and resubmitted for inspection.
7 Sampling plans
The supplier may be required at the discretion of the responsi-
7.1 Sampling plan
ble authority to inspect every unit of the lot for critical defects.
The right is reserved to inspect every unit submitted by the sup-
A sampling plan shall indicate the number of units of product
plier for critical defects and to reject the lot immediately when a
from each lot which are to be inspected (sample size or series of
critical defect is found. The right is reserved also to sample, for
sample sizes) and the criteria for determining the acceptability
critical defects, every lot submitted by the supplier and to reject
of the lot (acceptance and rejection numbers). Unless other-
any lot if a sample drawn therefrom is found to contain one or
wise directed by the purchaser, the sampling plans shall be
more critical defects.
considered as normal inspection procedures and shall be used
from the start of inspection.
5.4 Resubmitted lots
Lots found unacceptable may be resubmitted for reinspection 7.2 Types of sampling plan
only after all items are re-examined or retested and all defec-
tives are removed or the defects corrected. The purchaser shall Three sampling plans for normal inspection are given in
tables 1, 2 and 3.
state whether reinspection shall include all types or classes of
defect, or only the particular type or class of defect which
caused initial rejection.
7.2.1 Sampling for visual and di mensional examinations
and for all non-dest ructive tests
Sampling for visual examination, dimensional tolerance exam-
6 Selection of samples (sampling)
ination, non-destructive thickness test, and all other non-
in accordance with
destructive procedures, shall be conducted
61 . Sample
table 1, unless the units of product were produced by barrel
electroplating, in which case, table 2 shall be used as the
A sample shall consist of one or more units of product selected
sampling plan. Unless a need can be demonstrated, separately
at random from a lot submitted for inspection without taking
prepared specimens shall not be used in lieu of production
into account their quality. The number of units of product in
items for non-destructive examinations and tests.
the sample is the sample size. Defective units shall be neither
deliberately included, nor excluded, from the random sample.
When selecting the samples, the supplier shall identify all units 7.2.2 Sampling for all destructive tests
which are observed to be defective, in order to dispose of or
rework them after completion of inspection. Sampling for each destructive test, such as hydrogen embrittle-
ment, adhesion, corrosion resistance, solderability, etc., shall
be conducted for each test in accordance with table 3. If the
6.2 Representative sampling
electroplated or coated articles are of such form,* shape, size or
value, as to prohibit the use thereof, or are not readily adap-
When appropriate, the number of units in the sample shall be
table to the test specified in the contract, purchase order or ap-
selected in proportion to the size of sub-lots, or parts of lots,
plicable standard, or if destructive tests of small lot sizes are re-
identified by some rational criterion. If representative sampling
quired, sampling for tests shall be permitted by use of separate
is used, the units from each part of the lot shall be selected at
specimens processed concurrently with the articles they repre-
random. See the annex for methods of drawing samples.
sent, as detailed in the purchase document or in 4.2. Unless a
need can be demonstrated, separately prepared specimens
6.3 Lot size
shall not be used in lieu of the production items for thickness
measurements.
The supplier and purchaser shall agree on a figure which is
mutually convenient and which takes into account the nature
of the production process. From the point of view of inspection 7.2.3 Alternative sampling plans
costs there is an advantage in large lots since the sample is a
smaller proportion of the lot and discrimination improves. If specified in the contract or purchase order, alternative sampl-
However, large lots should not be formed where to do so would ing plans may be substituted for those of tables 1, 2 and 3.
hold up the flow of production and smaller lots could have been There are a vast number of different types of sampling plan
sampled separately to maintain the flow. Also, small lots should
other than those detailed herein, and, in many instances, any
not be combined if there is doubt that they are of similar number of alternative sampling schemes may be used for a
quality. Lots should consist of units of product produced under specific situation involving electrodeposited metallic coatings
essentially the same conditions. and related finishes. The selection of a particular type of alter-
3
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SIST EN ISO 4519:2016
IS0 4519-1980 (E)
sampling plan is not an easy task, because selection
native 7.2.5 Isolated lots
should actually be based upon the following factors
The sampling plans in tables 1 to 5 are designed for continuing
a) properties of the sampling plan; series of lots produced over a period and the safeguard is pro-
vided by the switchi
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Elektrolytisch abgeschiedene metallische Überzüge und verwandter Finishs - Stichprobenverfahren zur Qualitätskontrolle (ISO 4519:1980)Dépôts électrolytiques et finitions apparentées - Méthodes d'échantillonnage pour le contrôle par attributs (ISO 4519:1980)Electrodeposited metallic coatings and related finishes - Sampling procedures for inspection by attributes (ISO 4519:1980)25.220.40Kovinske prevlekeMetallic coatingsICS:Ta slovenski standard je istoveten z:FprEN ISO 4519kSIST FprEN ISO 4519:2015en,fr,de01-december-2015kSIST FprEN ISO 4519:2015SLOVENSKI
STANDARDSIST ISO 4519:19991DGRPHãþD
kSIST FprEN ISO 4519:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN ISO 4519
October
t r s w ICS
t wä t t rä v r English Version
Electrodeposited metallic coatings and related finishes æ Dépôts électrolytiques et finitions apparentées æ Méthodes d 5échantillonnage pour le contrôle par
Elektrolytisch abgeschiedene metallische Überzüge und verwandter Finishs æ Stichprobenverfahren zur This draft European Standard is submitted to CEN members for unique acceptance procedureä It has been drawn up by the
If this draft becomes a European Standardá CEN members are bounwhich stipulate the conditions for giving this European Standard the status of a national standard without any alterationä
This draft European Standard was established by CEN in three ofer language made by translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
Recipients of this draft are invited to submitá with their commentsá notification of any relevant patent rights of which they are aware and to provide supporting documentationä
Warning ã This document is not a European Standardä It is distributed for review and commentsä It is subject to change without notice and shall not be referred to as a European Standardä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
9
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä FprEN ISO
v w s {ã t r s w EkSIST FprEN ISO 4519:2015
FprEN ISO 4519:2015 (E) 2 Contents Page European Foreword . 3 kSIST FprEN ISO 4519:2015
FprEN ISO 4519:2015 (E) 3 European Foreword The text of ISO 4519:1980 has been prepared by Technical Committee ISO/TC 107 “Metallic and other inorganic coatings” of the International Organization for Standardization (ISO) and has been taken over as FprEN ISO 4519:2015 by Technical Committee CEN/TC 262 “Metallic and other inorganic coatings” the secretariat of which is held by BSI. This document is currently submitted to the Unique Acceptance Procedure. Endorsement notice The text of ISO 4519:1980 has been approved by CEN as FprEN ISO 4519:2015 without any modification. kSIST FprEN ISO 4519:2015
kSIST FprEN ISO 4519:2015
International Standard INTERNATIONAL ORkANlZATlON FOR STANDARDIZATlON.ME)I(LZYHAPOflHAR OPrAHM3Al#lfl IlO CTAH~APTI43A~WWORGANlSATlON INTERNATIONALE DE NORMALISATION Electrodeposited metallic coatings and related finishes - Sampling procedures for inspection by attributes D&p6 ts Alec troly tiques et finitions apparent&es - M&bodes d%chanti!lonnage pour le cont&e par attributs First edition 1980-07-15 U DC 669.056 : 621357.7 : 620.113 Ref. No. IS0 4519-1980 (E) Descriptors : metal coatings, electrodeposited coatings, electrodeposition, definitions, sampling, sampling tables (plans), quality control, inspection by attributes. Price based on 10 pages kSIST FprEN ISO 4519:2015
Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 member bodies). The work of developing Inter- national Standards is carried out through IS0 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, governmental 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. International Standard IS0 4519 was developed by Technical Committee ISO/TC 107, Meta//ic and other non-organic coatings, and was circulated to the member bodies in March 1979. It has been approved by the member bodies of the following countries : Bulgaria Israel Canada Italy Czechoslovakia Japan France Korea, Rep, of Germany, F. R. Libyan Arab Jamahiriya Hungary Poland India Romania South Africa, Rep. of Spain Sweden Switzerland Turkey United Kingdom USA The member body technical grounds 0 of the following country expressed disapproval of the document on Netherlands International Organization for Standardization, 1980 Printed in Switzerland kSIST FprEN ISO 4519:2015
INTERNATIONAL STANDARD IS0 4519-1980 (E) Electro’deposited metallic coatings and related finishes - Sampling procedures for inspection by attributes 1 Scope and field of application This International Standard establishes sampling plans and procedures for inspection by attributes of electrodeposited metallic coatings. It may be applied to related finishes by agreement between the supplier and the purchaser. It is based on IS0 2859 (see also Addendum 1 to IS0 2859). The sampling plans in this International Standard are applicable, but not limited, to the inspection of end items, components, materials in process and finished products in storage. The plans are intended primarily to be used for a continuing series of lots, but they may also be used for the inspection of isolated lots. However, the assurance given for isolated lots is lower than that given for a continuing series of lots. This International Standard is not applicable to the sampling and testing of mechanical fasteners having electrodeposited metallic coatings or related finishes, in all the circumstances for which procedures for these components are specified in IS0 3269. The sampling plans given in this International Standard are based on AQLsl) of 1,5 and 4,0 %. Other AQLs may be used if specified in the product specification, in which case reference should be made to IS0 2859 and its Addendum 1. It is also possible to formulate sampling plans based on inspection by variables. 2 References I S 0 2859, Sampling procedures and tables for inspection by at- tributes. IS0 2859lAdd. 1, Genera/information on sampling inspection, and guide to the c/se of the /SO 28s tables. IS0 3269, Fasteners - Acceptance inspection. 2) IS0 3534, Statistics - Vocabulary and symbols. 3 Definitions NOTE - Some of these definitions are not identical with those in IS0 3534 but have been modified to make them easier to understand by non-statisticians and to make them more readily applicable to elec- troplated thems. 3.1 inspection : The process of measuring, examining, testing, or otherwise comparing the unit of product (see 3.4) with the requirements. 3.2 attribute : A characteristic or property which is appraised in terms of whether it does or does not exist (for example go or no-go) with respect to a given requirement. 33 inspection by attribute(s) : Inspection whereby either the unit of product is simply classified as defective or non- defective, or the number of defects in the unit of product is counted, with respect to one or more given requirements. 34 . unit of product : The object inspected either to deter- mine its classification as defective or non-defective, or to count the number of defects. It may be a single article, a pair, a set, a length, an area, an operation, a volume, a component of an end item or the end product itself. The unit of product may or may not be the same as the unit of purchase, supply, produc- tion, or shipment. 3.5 acceptance number : The maximum number of defects or defective units in the sample that will permit acceptance of the inspection lot. 3.6 rejection number : The minimum number of defects or defective units in the sample that will cause rejection of the in- spection lot. 37 . inspection lot : A collection of coated articles that-are of the same kind, that’ have been produced to the same specifications, that have been coated by a single supplier at one time, or at approximately the same time, under essentially iden- tical conditions and that are submitted for acceptance or rejec- tion as a group. 1) AQL = Acceptable Quality Level. 2) At present at the stage of draft. 1 kSIST FprEN ISO 4519:2015
IS0 45194980 (E) 3.8 Classification of defects and defectives 3.8.1 method of classifying defects : The enumeration of possible defects of the unit of product classified according to their seriousness. A defect is any non-conformance of the unit of product to the specified requirements. Defects are normally grouped into one or more of the following classes; however, defects may be grouped into other classes or into sub-classes within these classes. 3.8.1.1 critical defect : A defect that judgement and ex- perience indicate is likely to result in hazardous or unsafe con- ditions for the individual using, maintaining, or depending upon the unit of product which has an electrodeposited metallic coating or related finish. It may also be a defect in the coating that judgement and experience indicate is likely to prevent per- formance of the primary function of a major end item. 3.8.1.2 major defect : A defect, other than critical, that is likely to result in failure of the finish, or to reduce materially the usability of the unit of product for its intended purpose. 3.8.1.3 minor defect : A defect that is not likely to reduce materially the usability of the unit of product for its intended purpose, or is a departure from established standards having little or no bearing on the effective use or operation of the item which has an electrodeposited coating or related finish. NOTE - Inspection for detection of critical defects may require non- destructive examination of every unit of product in the lot. In this Inter- national Standard, all defects not conforming to the specified re- quirements in the product item specifications for electrodeposited coatings and related finishes are considered to be major. If specified by the purchaser, the maximum number of defects per hundred items, or the maximum percent defective laid down in this International Stan- dard can be increased for the purpose of sampling inspection of minor defects. 3.8.2 method of classifying defectives : A defective is a unit of product which contains one or more defects. Defectives are usually classified as follows : 3.8.2.1 critical defective : A defective which contains one or more critical defects, and which may contain major or minor defects. 3.8.2.2 major defective : A defective which contains one or more major defects, and which may contain minor defects but no critical defects. 3.8.2.3 minor defective : A defective which contains more minor defects, but no critical or major defects. one or 3.9 expression of non-conformance : The extent of non- conformance of a product expressed either in terms of percent defective, or in terms of defects per hundred items. 3.10 percent defective : One hundred times the number of defective units of product of product inspected, i.e. divided by the total number of units Percent defective = number of units inspected number of defectives x 100 4 Product submission 4.1 Lot An inspection lot shall be a collection of items from which a sample shall be randomly drawn and inspected to determine conformance with the acceptance criteria. It may differ from a collection of units of product designated as a lot for other pur- poses, such as production, shipment, and storage. 4.2 Formation of lots The product shall be assembled into identifiable lots, sub-lots, or in such manner as may be prescribed (see 6.3). Each lot shall, as far as practicable, consist of units of product or separate specimens of the same basic material composition, of a single type, grade or class of the coating or finish, and ap- proximately the same size and shape, processed under essen- tially the same conditions, and at essentially the same time (see 7.2.2). 4.3 Lot size The lot size is the number of units of product in a lot. 4.4 Presentation of lots Unless specified by the purchaser in the contract or order, the formation of lots, the lot size and the manner in which the lot is to be presented and identified shall be designated by the sup- plier. 5 Acceptance and rejection 5.1 Responsibility for tests Unless otherwise specified in the contract or purchase order, the supplier shall be responsible for performing all the required tests for compliance with the specified inspection re- quirements, and the supplier may use his own or any other laboratory facilities suitable for performance of the inspection requirements. The purchaser shall have the right to perform any of the inspections detailed in the material document, when such action is deemed necessary to ensure that the elec- trodeposited metallic coating or the related finish conforms to the prescribed requirements. Reports of the test results shall be available for examination by the purchaser for 1 year from the date of acceptance of the material by him. Copies of the test reports and test details shall be furnished when required by the contract or purchase order. 5.2 Acceptability of lots Acceptabi ing plan. lity of a lot shall be determi ned by the use of a sampl- 2 kSIST FprEN ISO 4519:2015
IS0 45194980 (El 5.3 Defective items 6.4 Time of sampling The purchaser shall have the right to reject any unit of product found defective during inspection, whether that unit of product forms part of a sample or not, and whether the lot as a whole is accepted or rejected. With the approval of, and in the manner specified by the purchaser, rejected items may be repaired or corrected and resubmitted for inspection. Samples may be drawn after all the units comprising the lot have been assembled, or during assembly of the lot. , 7 Sampling plans The supplier may be required at the discretion of the responsi- ble authority to inspect every unit of the lot for critical defects. The right is reserved to inspect every unit submitted by the sup- plier for critical defects and to reject the lot immediately when a critical defect is found. The right is reserved also to sample, for critical defects, every lot submitted by the supplier and to reject any lot if a sample drawn therefrom is found to contain one or more critical defects. 7.1 Sampling plan A sampling plan shall indicate the number of units of product from each lot which are to be inspected (sample size or series of sample sizes) and the criteria for determining the acceptability of the lot (acceptance and rejection numbers). Unless other- wise directed by the purchaser, the sampling plans shall be considered as normal inspection procedures and shall be used from the start of inspection. 5.4 Resubmitted lots Lots found unacceptable may be resubmitted for reinspection only after all items are re-examined or retested and all defec- tives are removed or the defects corrected. The purchaser shall state whether reinspection shall include all types or classes of defect, or only the particular type or class of defect which caused initial rejection. 7.2 Types of sampling plan Three sampling plans for normal inspection are given in tables 1, 2 and 3. 7.2.1 Sampling for visual and di and for all non-dest ructive tests mensional examinations 6 Selection of samples (sampling) 61 . Sample Sampling for visual examination, dimensional tolerance exam- ination, non-destructive thickness test, and all other non- destructive procedures, shall be conducted in accordance with table 1, unless the units of product were produced by barrel A sample shall consist of one or more units of product selected at random from a lot submitted for inspection without taking into account their quality. The number of units of product in the sample is the sample size. Defective units shall be neither deliberately included, nor excluded, from the random sample. When selecting the samples, the supplier shall identify all units which are observed to be defective, in order to dispose of or rework them after completion of inspection. electroplating, in which case, table 2 shall be used as the sampling plan. Unless a need can be demonstrated, separately prepared specimens shall not be used in lieu of production items for non-destructive examinations and tests. 7.2.2 Sampling for all destructive tests Sampling for each destructive test, such as hydrogen embrittle- ment, adhesion, corrosion resistance, solderability, etc., shall be conducted for each test in accordance with table 3. If the electroplated or coated articles are of such form,* shape, size or value, as to prohibit the use thereof, or are not readily adap- table to the test specified in the contract, purchase order or ap- plicable standard, or if destructive tests of small lot sizes are re- quired, sampling for tests shall be permitted by use of separate specimens processed concurrently with the articles they repre- sent, as detailed in the purchase document or in 4.2. Unless a 6.2 Representative sampling When appropriate, the number of units in the sample shall be selected in proportion to the size of sub-lots, or parts of lots, identified by some rational criterion. If representative sampling is used, the units from each part of the lot shall be selected at random. See the annex for methods of drawing samples. 6.3 Lot size need can be demonstrated, separately prepared specimens shall not be used in lieu of the production items for thickness measurements. The supplier and purchaser shall agree on a figure which is mutually convenient and which takes into account the nature of the production process. From the point of view of inspection costs there is an advantage in large lots since the sample is a smaller proportion of the lot and discrimination improves. However, large lots should not be formed where to do so would hold up the flow of production and smaller lots could have been sampled separately to maintain the flow. Also, small lots should not be combined if there is doubt that they are of similar 7.2.3 Alternative sampling plans If specified in the contract or purchase order, alternative sampl- ing plans may be substituted for those of tables 1, 2 and 3. There are a vast number of different types of sampling plan other than those detailed herein, and, in many instances, any number of alternative sampling schemes may be used for a specific situation involving electrodeposited metallic coatings and related finishes. The selection of a particular type of alter- quality. Lots should consist of units of product produced under essentially the same conditions. 3 kSIST FprEN ISO 4519:2015
IS0 4519-1980 (E) native sampling plan is not an easy task, because should actually be based upon the following factors a) properties of the sampling plan; b) ease of administering the sampling plan; c) protection afforded; d) amount of inspection required; selection e) cost of inspection. In addition to the necessity for appropriately considering the above factors, it should also be recognized that a plan adopted for one type of product may not be the best for another. Fur- thermore, the past history of the supplier can play an important role in the selection of an alternative sampling plan. NOTE - General information on procedures given in IS0 2859 and its Addendum 1. 7.2.4 Switching procedures for alternative sampling is At the start of inspection, the acceptance or rejection of lots shall be in accordance with the plans given in tables 1, 2 or 3, as appropriate. Lots found to be unaccept
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