ISO INTERNATIONAL STANDARD 13331 First edition 1995-06-01 Road vehicles --- Filler pipes and openings of motor vehicle fuel tanks Vapour recovery system Véhicules routiers - Tuyaux et orifices de remplissage des reéservoirs a carburant des automobiles - Systeme de récuperation des vapeurs ISO Reference number ISO 13331·1995(E) Copyright International Organization for Standardizatio networking permitted without license from IHS Not for Resale 1SO13331:1995(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 which a technical committee has been established has the right to be represented onthat committee.Internationalorganizations,governmental and non-governmental, in liaison with IsO, aiso take part in the work. ISO collaborates closely with the International Electrotechnical Commission (lEC) 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. ISO/TC 22, Road vehicles, Subcommittee SC 16, Reduction of fire risks. Annex A of this International Standard is for information only. ISO 1995 All rights reserved. Unless otherwise specified, no part of this publrcation may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization CasePostale 56·CH-1211Geneve20·Switzerland PrintedinSwitzerland i Not for Resale INTERNATIONAL STANDARD ISO ISO 13331:1995(E) Road vehicles - Filler pipes and openings of motor vehicle fuel tanks Vapour recovery system 1 Scope 2.3 filler pipe sealing surface: That part of the filler pipe against whicha certaintype of recoverynozzle This International Standard ensures compatibility be- can effect a vapour-tight seal (see figure 1). tween new petrol-powered vehicle designs and refuelling vapour recovery nozzles - both active and 2.4 nozzle test gauge: Gauge with dimensions as passive systems -- by their dimensions and specifi- shownin figure6,usedtoestablishthe reference cations. lines around which the filler pipe access zone is de- fined. NOTE 1 The dimensions and specifications of this Inter- national Standard are based on SAE J1140. 2.5 reference plane: Plane which contains the axial centreline of the filler pipe sealing surface, and is ro- This International Standard was developed primarily for passenger car and commercial vehicle applications tated into the direction which the manufacturer of the but may be used in marine, industrial and similar automobile has determined to be the orientation in whichthenozzleistobeinserted. quired. 2.6 normal resting position of nozzle test gauge: For national standards, see annex A Gauge position when the following conditions are met. 2.6.1 The gauge is inserted into the filler pipe, such 2Definitions that the axial centreline of the gauge lies in the refer- ence plane. For the purposes of this International Standard, the following definitions apply. 2.6.2 The locking ring of the gauge is located im- mediately to the inside (i.e. the vehicle tank side) of the locking lip. 2.1 active vapour recovery system: System whereby the vapour is extracted during fuel filling by 2.6.3 Either the gauge locking ring rests upon the a powered form of extraction, e.g. a vacuum pump. filler pipe wall, or the gauge shaft rests upon the This system may require sealing of the filler pipe or locking lip as shown in figures 2 a) and 3 a), respect- may be the open type (not sealed). ively. 2.6.4 The fuel-dispensing end of the gauge, as indj- 2.2 passive vapour recovery system: System cated in figures 2a) and 3a), is in contact with a re- where