EN ISO 7686:2005

SLOVENSKI STANDARD
01-september-2005
1DGRPHãþD
SIST EN 578:1997
Polimerne cevi in fitingi – Ugotavljanje svetlobne prepustnosti (ISO 7686:2005)
Plastics pipes and fittings - Determination of opacity (ISO 7686:2005)
Rohre und Formstücke aus Kunststoffen - Bestimmung der Opazität (ISO 7686:2005)
Tubes et raccords en matieres plastiques - Détermination de l'opacité (ISO 7686:2005)
Ta slovenski standard je istoveten z: EN ISO 7686:2005
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 7686
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2005
ICS 23.040.20; 23.040.45 Supersedes EN 578:1993
English Version
Plastics pipes and fittings - Determination of opacity (ISO
7686:2005)
Tubes et raccords en matières plastiques - Détermination Rohre und Formstücke aus Kunststoffen - Bestimmung der
de l'opacité (ISO 7686:2005) Opazität (ISO 7686:2005)
This European Standard was approved by CEN on 20 June 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
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Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7686:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 7686:2005) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with Technical
Committee CEN/TC 155 "Plastics piping systems and ducting systems", the secretariat of which
is held by NEN.
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 January 2006, and conflicting national
standards shall be withdrawn at the latest by January 2006.

This document supersedes EN 578:1993.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 7686:2005 has been approved by CEN as EN ISO 7686:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 7686
Second edition
2005-07-01
Plastics pipes and fittings —
Determination of opacity
Tubes et raccords en matières plastiques — Détermination de l'opacité

Reference number
ISO 7686:2005(E)
©
ISO 2005
ISO 7686:2005(E)
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ISO 7686:2005(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. 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 7686 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 5, General properties of pipes, fittings and valves of plastic materials and
their accessories — Test methods and basic specifications.
This second edition cancels and replaces the first edition (ISO 7686:1992), of which it constitutes a technical
revision. It incorporates the following modifications:
 a note giving the principal reason for measurement of opacity of products has been added to the scope;
 the use of an integrati
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