EN ISO 7536:1996

Petroleum products - Determination of oxidation stability of gasoline - Induction period method (ISO 7536:1994)

The principle of the method specified is oxidizing the sample in a pressure bomb initially filled at 15 °C to 25 °C with oxygen at 690 kPa, heating at a temperature between 98 °C and 102 °C, reading the pressure at stated intervals or recorded continuously until the breakpoint is reached. The time required for the sample to reach this point is the observed induction period at the temperature of test, from which the induction period at 100 °C may be calculated. The method is applicable for aviation and motor gasolines in their finished form only.

Mineralölerzeugnisse - Bestimmung der Oxidationsbeständigkeit von Ottokraftstoff-Induktionsdauerverfahren (ISO 7536:1994)

Produits pétroliers - Détermination de la stabilité à l'oxydation de l'essence - Méthode de la période d'induction (ISO 7536:1994)

1.1 La présente Norme internationale prescrit une méthode pour la détermination de la stabilité de l'essence aviation et de l'essence pour moteur sous forme de produit fini seulement et dans des conditions d'oxydation accélérée, par la mesure en bombe d'oxydation de la période d'induction jusqu'au point critique. 1.2 La méthode1) n'est pas destinée à la détermination de la stabilité des coupes essences individuelles, en particulier celles qui présentent un pourcentage élevé de fractions insaturées à bas point d'ébullition car celles-ci créent des conditions explosives à l'intérieur de l'appareillage. Étant donné que l'on peut avoir à tester des échantillons de nature inconnue, l'appareillage incluant la bombe d'oxydation est muni de disques de rupture afin d'assurer la sécurité de l'opérateur. 1.3 La période d'induction peut être utilisée comme une indication de la tendance d'une essence à former des gommes pendant le stockage. Il est cependant reconnu que la corrélation entre les résultats de l'essai et la formation de gommes pendant le stockage peut varier de façon importante en fonction des conditions de stockage et suivant les différentes essences.

Naftni proizvodi - Ugotavljanje oksidacijske obstojnosti bencina - Metoda z indukcijskim časom (ISO 7536:1994)

General Information

• Status: Published
• Publication Date: 14-Feb-1996
• Withdrawal Date: 30-Aug-1996
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 17-Aug-2006
• Completion Date: 17-Aug-2006
• Ref Project: SIST EN ISO 7536:1998 - Petroleum products - Determination of oxidation stability of gasoline - Induction period method (ISO 7536:1994)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 7536:1998
01-maj-1998
1DIWQLSURL]YRGL8JRWDYOMDQMHRNVLGDFLMVNHREVWRMQRVWLEHQFLQD0HWRGD]
LQGXNFLMVNLPþDVRP,62
Petroleum products - Determination of oxidation stability of gasoline - Induction period
method (ISO 7536:1994)
Mineralölerzeugnisse - Bestimmung der Oxidationsbeständigkeit von Ottokraftstoff-
Induktionsdauerverfahren (ISO 7536:1994)
Produits pétroliers - Détermination de la stabilité a l'oxydation de l'essence - Méthode de
la période d'induction (ISO 7536:1994)
Ta slovenski standard je istoveten z: EN ISO 7536:1996
ICS:
75.160.20 7HNRþDJRULYD Liquid fuels
SIST EN ISO 7536:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 7536:1998

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SIST EN ISO 7536:1998

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SIST EN ISO 7536:1998

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SIST EN ISO 7536:1998
INTERNATIONAL ISO
STANDARD 7536
First edition
1994-08-01
Petroleum products - Determination of
Oxidation stability of gasoline - Induction
period method
Produits p6 troliers - Determination de Ia stabilit6 2 I ’oxyda tion de
I ’essence - Methode de Ia Periode d ’induction
Reference number
EO 7536:1994(E)

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SIST EN ISO 7536:1998
ISO 7536: 1994(E)
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. Esch 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.
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.
International Standard ISO 7536 was prepared by Technical Committee
ISO/TC 28, Petroleum products and lubrican ts.
Annexes A and B form an integral part of this International Standard.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organkation for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland

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SIST EN ISO 7536:1998
INTERNATIONAL STANDARD 0 ISO ISO 7536: 1994(E)
Petroleum products - Determination of Oxidation
- Induction period method
stability of gasoline
- The use of this International Standard may involve hazardous materials, operations
WARNING
and equipment. This Standard does not purport to address all of the safety Problems associated
with its use. lt is the responsibility of the User of this Standard to establish appropriate safety and
health practices and determine the applicability of regulatory limitations Prior to use.
2.1 breakpoint: Point in the pressure-time cun/e
1 Scope
that is preceded by a pressure drop of exactly
14 kPa within 15 min and succeeded by a drop of not
1.1 This International Standard specifies a method
less than 14 kPa in 15 min.
for the determination of the stability of aviation and
2.2 induction period: Time elapsed between the
motor gasolines in their finished form only, under ac-
placing of the bomb in the bath and the breakpoint at
celerated Oxidation conditions, by measuring the in-
duction period to breakpoint in a pressure bomb 100 OC.
apparatus.
3 Principle
1.2 The methodl) is not intended for the determi-
The Sample is oxidized in a pressure bomb initially
nation of the stability of gasoline components individ-
filled at 15 “C to 25 “C with Oxygen at 690 kPa and
ually, particularly those with a high percentage of
heated at a temperature between 98 “C and 102 ‘C.
low-boiling unsaturated compounds, as they may
The pressure is read at stated intervals or recorded
Cause explosive conditions within the apparatus.
continuously until the breakpoint is reached. The time
However, because of the unknown nature of certain
required for the Sample to resch this Point is the ob-
samples, the specified bomb assembly includes a
served induction period at the temperature of test,
safety burst-disc in Order to safeguard the operatot-.
from which the induction period at 100 “
...