-
Dansk standard
DS/EN ISO 291
3. udgave
2008-05-27
Plast – Standardatmosfærer for
konditionering og prøvning
Plastics – Standard atmospheres for conditioning and testing
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
DS-publikationstyper Dansk Standard udgiver forskellige
publikationstyper. Typen på denne publikation fremgår af forsiden.
Der kan være tale om: Dansk standard
• standard, der er udarbejdet på nationalt niveau, eller som er
baseret på et andet lands nationale standard, eller • standard, der
er udarbejdet på internationalt og/eller europæisk niveau, og som
har fået status som dansk standard
DS-information • publikation, der er udarbejdet på nationalt
niveau, og som ikke har opnået status som standard, eller •
publikation, der er udarbejdet på internationalt og/eller europæisk
niveau, og som ikke har fået status som standard, fx en
teknisk rapport, eller • europæisk præstandard DS-håndbog •
samling af standarder, eventuelt suppleret med informativt
materiale
DS-hæfte • publikation med informativt materiale
Til disse publikationstyper kan endvidere udgives
• tillæg og rettelsesblade DS-publikationsform
Publikationstyperne udgives i forskellig form som henholdsvis
• fuldtekstpublikation (publikationen er trykt i sin helhed) •
godkendelsesblad (publikationen leveres i kopi med et trykt
DS-omslag) • elektronisk (publikationen leveres på et elektronisk
medie)
DS-betegnelse Alle DS-publikationers betegnelse begynder med DS
efterfulgt af et eller flere præfikser og et nr., fx DS 383, DS/EN
5414 osv. Hvis der efter nr. er angivet et A eller Cor, betyder
det, enten at det er et tillæg eller et rettelsesblad til
hovedstandarden, eller at det er indført i hovedstandarden.
DS-betegnelse angives på forsiden. Overensstemmelse med anden
publikation: Overensstemmelse kan enten være IDT, EQV, NEQ eller
MOD
• IDT: Når publikationen er identisk med en given publikation. •
EQV: Når publikationen teknisk er i overensstemmelse med en given
publikation, men
præsentationen er ændret. • NEQ: Når publikationen teknisk eller
præsentationsmæssigt ikke er i overensstemmelse med en
given standard, men udarbejdet på baggrund af denne. • MOD: Når
publikationen er modificeret i forhold til en given
publikation.
DS/EN ISO 291 København DS projekt: M227563 ICS: 83.080.01
Første del af denne publikations betegnelse er: DS/EN ISO, hvilket
betyder, at det er en international standard, der har status både
som europæisk og dansk standard. Denne publikations
overensstemmelse er: IDT med: ISO 291:2008. IDT med: EN ISO
291:2008. DS-publikationen er på engelsk. Denne publikation
erstatter: DS/EN ISO 291:2005.
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
EN ISO 291
May 2008
ICS 83.080.01 Supersedes EN ISO 291:2005
English Version
Plastics - Standard atmospheres for conditioning and testing(ISO
291:2008)
Plastiques - Atmosphères normales de conditionnement etd'essai
(ISO 291:2008)
Kunststoffe - Normalklimate für Konditionierung undPrüfung (ISO
291:2008)
This European Standard was approved by CEN on 21 April 2008.
CEN members are bound to comply with the CEN/CENELEC Internal
Regulations which stipulate the conditions for giving this
EuropeanStandard the status of a national standard without any
alteration. Up-to-date lists and bibliographical references
concerning such nationalstandards may be obtained on application to
the CEN 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
translationunder the responsibility of a CEN member into its own
language and notified to the CEN Management Centre has the same
status as theofficial versions.
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 STANDARDIZATIONC O M I T É E U R O P É E
N D E N O R M A LI S A T I O NEUR OP ÄIS C HES KOM ITEE FÜR NOR M
UNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any
means reservedworldwide for CEN national Members.
Ref. No. EN ISO 291:2008: E
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
EN ISO 291:2008 (E)
2
Contents Page
Foreword..............................................................................................................................................................3
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
EN ISO 291:2008 (E)
3
Foreword
This document (EN ISO 291:2008) has been prepared by Technical
Committee ISO/TC 61 "Plastics" in collaboration with Technical
Committee CEN/TC 249 “Plastics” the secretariat of which is held by
NBN.
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 November 2008, and conflicting
national standards shall be withdrawn at the latest by November
2008.
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 EN ISO 291:2005.
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,
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 the United
Kingdom.
Endorsement notice
The text of ISO 291:2008 has been approved by CEN as a EN ISO
291:2008 without any modification.
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
Reference numberISO 291:2008(E)
© ISO 2008
INTERNATIONAL STANDARD
ISO291
Fourth edition2008-05-01
Plastics — Standard atmospheres for conditioning and testing
Plastiques — Atmosphères normales de conditionnement et
d'essai
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
ISO 291:2008(E)
PDF disclaimer This PDF file may contain embedded typefaces. In
accordance with Adobe's licensing policy, this file may be printed
or viewed but shall not be edited unless the typefaces which are
embedded are licensed to and installed on the computer performing
the editing. In downloading this file, parties accept therein the
responsibility of not infringing Adobe's licensing policy. The ISO
Central Secretariat accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file
can be found in the General Info relative to the file; the
PDF-creation parameters were optimized for printing. Every care has
been taken to ensure that the file is suitable for use by ISO
member bodies. In the unlikely event that a problem relating to it
is found, please inform the Central Secretariat at the address
given below.
COPYRIGHT PROTECTED DOCUMENT © ISO 2008 All rights reserved.
Unless otherwise specified, no part of this publication may be
reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without
permission in writing from either ISO at the address below or ISO's
member body in the country of the requester.
ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel. +
41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web
www.iso.org
ii © ISO 2008 – All rights reserved
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
ISO 291:2008(E)
© ISO 2008 – All rights reserved iii
Contents Page
Foreword............................................................................................................................................................
iv 1 Scope
.....................................................................................................................................................
1 2 Normative references
...........................................................................................................................
1 3 Terms and
definitions...........................................................................................................................
1 4
Principle.................................................................................................................................................
2 5 Standard
atmosphere...........................................................................................................................
2 6 Classes of standard atmosphere
........................................................................................................
2 7 Standard and ambient temperatures
..................................................................................................
3 8 Procedure
..............................................................................................................................................
3 Annex A (normative) Attainment of moisture equilibrium by
plastics in a conditioning atmosphere...... 4 Annex B (informative)
Background information
.............................................................................................
6 Bibliography
.......................................................................................................................................................
8
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
ISO 291:2008(E)
iv © ISO 2008 – All rights reserved
Foreword
ISO (the International Organization for Standardization) is a
worldwide federation of national standards bodies (ISO member
bodies). The work of preparing International Standards is normally
carried out through ISO 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, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates
closely with the International Electrotechnical Commission (IEC) on
all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules
given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare
International Standards. Draft International Standards adopted by
the technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval
by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements
of this document may be the subject of patent rights. ISO shall not
be held responsible for identifying any or all such patent
rights.
ISO 291 was prepared by Technical Committee ISO/TC 61, Plastics,
Subcommittee SC 6, Ageing, chemical and environmental
resistance.
This fourth edition cancels and replaces the third edition (ISO
291:2005), of which it constitutes a minor revision. The main
changes are as follows:
⎯ in Table 1, the way in which the two standard atmospheres are
used is now described in terms of non-tropical and tropical
countries;
⎯ a second note, concerning the unacceptability of wider
tolerances on temperature and relative humidity, has been added at
the end of Clause 6.
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008
-
INTERNATIONAL STANDARD ISO 291:2008(E)
© ISO 2008 – All rights reserved 1
Plastics — Standard atmospheres for conditioning and testing
1 Scope
This International Standard sets out specifications relating to
the conditioning and testing of all plastics and all types of test
specimen at constant atmospheric conditions.
Special atmospheres applicable to a particular test or material
or simulating a particular climatic environment are not included in
this International Standard.
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.
ISO 62, Plastics — Determination of water absorption
3 Terms and definitions
For the purposes of this document, the following terms and
definitions apply.
3.1 standard atmosphere preferred constant atmosphere for which
specific air temperature and humidity values, as well as limit
ranges for atmospheric pressure and air-circulation velocity, are
specified, the air not having any significant additional
constituents and the atmosphere not being subject to any
significant additional radiation influences
NOTE 1 Standard atmospheres permit a defined state to be
attained and maintained for samples or specimens.
NOTE 2 Standard atmospheres correspond to the average
atmospheric conditions in laboratories and can be established in
conditioning (controlled atmosphere) cabinets, chambers or
rooms.
3.2 conditioning atmosphere constant atmosphere in which a
sample or test specimen is kept before being subjected to a
test
3.3 test atmosphere constant atmosphere to which a sample or
test specimen is exposed throughout a test
3.4 conditioning one or more operations intended to bring a
sample or test specimen into a state of equilibrium with regard to
temperature and humidity
3.5 conditioning procedure combination of the conditioning
atmosphere and the period of conditioning
CO
PY
RIG
HT
Dan
ish
Sta
nd
ard
s. N
OT
FO
R C
OM
ME
RC
IAL
US
E O
R R
EP
RO
DU
CT
ION
. DS
/EN
ISO
291
:200
8C
OP
YR
IGH
T ©
Dan
ish
Sta
ndar
ds. N
OT
FOR
CO
MM
ER
CIA
L U
SE
OR
RE
PR
OD
UC
TIO
N. D
S/E
N IS
O 2
91:2
008