EN ISO 6251:1995
(Main)Liquefied petroleum gases - Corrosiveness to copper - Copper strip test (ISO 6251:1982)
Liquefied petroleum gases - Corrosiveness to copper - Copper strip test (ISO 6251:1982)
Migrated from Progress Sheet (TC Comment) (2000-07-10): Decision of BT to submit this ISO document to UAP procedure.
Flüssiggase - Korrosionswirkung auf Kupfer - Kupferstreifenprüfung (ISO 6251:1982)
Diese Internationale Norm beschreibt ein Verfahren zur Feststellung, inwieweit Flüssiggase auf Kupfer korrosiv wirken. Anmerkung: Eine gleichwertige Kupferstreifenprüfung für weniger flüchtige Mineralölerzeugnisse: siehe ISO 2160.
Gaz de pétrole liquéfiés - Action corrosive sur le cuivre - Essai à la lame de cuivre (ISO 6251:1982)
Utekočinjeni naftni plini - Korozivnost na baker - Preskus z bakrenim trakom (ISO 6251:1982)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 6251:1998
01-maj-1998
8WHNRþLQMHQLQDIWQLSOLQL.RUR]LYQRVWQDEDNHU3UHVNXV]EDNUHQLPWUDNRP ,62
Liquefied petroleum gases - Corrosiveness to copper - Copper strip test (ISO 6251:1982)
Flüssiggase - Korrosionswirkung auf Kupfer - Kupferstreifenprüfung (ISO 6251:1982)
Gaz de pétrole liquéfiés - Action corrosive sur le cuivre - Essai a la lame de cuivre (ISO
6251:1982)
Ta slovenski standard je istoveten z: EN ISO 6251:1995
ICS:
75.160.30 Plinska goriva Gaseous fuels
SIST EN ISO 6251:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 6251:1998
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SIST EN ISO 6251:1998
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SIST EN ISO 6251:1998
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SIST EN ISO 6251:1998
International Standard 6251
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOME~YH~~HAR OPTAHHIAUHR il0 CTAH&APTH3AUHH«)RGANlSATlON INTERNATIONALE DE NORMALISATION
Liquefied petroleum gases - Corrosiveness to copper -
Copper strip test
Gaz de pétrole tiquefiés - Action corrosive sur Je cuivre - Essai à la lame de cuivre
First edition - 1982-08-15
UDC 665.725 : 620.193.471.2 Ref. No. IS0 6251-1982 (E)
Descriptors : petroleum products, liquefied petroleum gases, corrosive gases, tests, corrosion tests, copper products, metal strips.
Price based on 4 pages
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SIST EN ISO 6251:1998
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 6251 was developed by Technical Committee ISO/TC 28,
Petroleum products and lubricants, and was circulated to the member bodies in
March 1981.
It has been approved by the member bodies of the following countries :
Australia
Iran Peru
Austria Iraq
Poland
Belgium
Ireland Romania
Brazil Israel
South Africa, Rep. of
Canada Italy
Spain
China
Japan
Sri Lanka
Egypt, Arab Rep. of Korea, Dem. P. Rep. of Sweden
France Korea, Rep. of
Switzerland
Germany, F.R. Mexico United Kingdom
Hungary Netherlands
USA
India
Noway UÇSR
No member body expressed disapproval of the document.
0 International Organization for Standardization, 1982 0
Printed in Switzerland
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SIST EN ISO 6251:1998
~
IS0 6251-1982 (E)
INTERNATIONAL STANDARD
Liquefied petroleum gases - Corrosiveness to copper -
Copper strip test
Scope and field of application 4.1.2 Top closure, of stainless steel with a chloroprene rub-
1
ber O-ring.
This International Standard specifies a method for the detec-
tion of the corrosiveness to copper of liquefied petroleum The closure is tapped to take a 6 mm needle-valve and carries a
gases. stainless steel dip-tube at the lower end of which there is a
hook from which the copper strip is hung.
NOTE - For an equivalent copper strip test applicable to less volatile
IS0 2160.
petroleum products, see
4.1.3 Aluminium flexible connecting hose, with swivel
connections and adapter to a 6 mm pipe.
2 Reference
The assembly shall be tested hydrostatically to a pressure of
7,O MPa (70 bar) and no leak shall be detectable when it is filled
IS0 2160, Petroleum products - Corrosiveness to copper -
a pressure of 3.5 MPa (35 bar) and immersed in the
with gas at
Copper strip test.
water bath (4.2).
0
3 Principle
4.2 Water bath, capable of being maintained at
40 f 0,5 OC.
A polished copper strip is immersed for 1 h at a temperature of
40 OC in 100 ml of water-saturated sample contained in a
The bath shall be fitted with suitable supports to hold the test
cylinder of suitable working pressure. At the end of this period,
cylinder (4.1) in an upright position and be deep enough so that
the copper strip is removed and rated as one of the four
the entire cylinder and valves will be covered during the test.
classifications of the table by comparison with a copper corro-
sion standard plaque.
4.3 Thermometerlb. of the total immersion type having a
range of O to 50 OC, subdivided at intervals not greater than
4 Apparatus 0,2 OC, and having a scale error not greater than 0,l OC.
4.1 Corrosion test cylinder, (see the figure) consisting of
Strip-polishing vice, for holding the copper-strip firmly
4.4
the following items :
without marring the edge during polishing.
4.1.1 Stainless steel cylinder, of the form and dimensions Any convenient type may be used, provided that the strip is
held tightly and that the surface being polished is supported
shown in the figure and tapped at the lower end to take a 6 mm
needle-valve. above the surface of the holder.
1) A suitable thermometer would be ASTM 12 C, which is equivalent to IP 64 C.
1
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SIST EN ISO 6251:1998
IS0 6251-1982 (E)
Dimensions in millimetres
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SIST EN ISO 6251:1998
IS0 6251-1982 (E)
5 Materials moistened with several drops of wash solvent. Wipe vigorously
with fresh pads of absorbent cotton and subsequently handle
only with stainless steel forceps; do not touch with the fingers.
5.1 Wash solvent, Knock test grade isooctane conforming
Clamp in the vice (4.4) and polish the main surfaces with silicon
with the requirements of the annex to IS0 2160.
carbide grains on absorbent cotton. Rub in the direction of the
long axis of the strip, carrying the stroke beyond the end of the
strip before reversing the direction. Clean all metal dust from
5.2 Distilled water or water of equivalent purity.
the strip by rubbing vigorously with clean pads of absorbent
cotton until a fresh pad remains unsoiled. When the strip is
5.3 Copper strip, 75 mm long, 12,5 mm wide, and 1,5 to
clean, immediately attach it to the dip-tube (see 4.1.2) and im-
3,O mm thick, of the quality of copper described in IS0 2160.
it in the prepared test cylinder (4.1.1).
merse
Drill a 3,O mm hole approximately 3,O mm from one end in the
NOTE - It is important to polish the whole surface of the strip
centre of the strip.
unif
...
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