EN ISO 12162:1995

SLOVENSKI STANDARD
01-februar-1997
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Thermoplastics materials for pipes and fittings for pressure applications - Classification
and designation - Overall service (design) coefficient (ISO 12162:1995)
Thermoplastische Werkstoffe für Rohre und Formstücke bei Anwendungen unter Druck -
Klassifizierung und Werkstoffkennzeichnung - Gesamtbetriebs(berechnungs)koeffizient
(ISO 12162:1995)
Matieres thermoplastiques pour tubes et raccords pour applications sous pression -
Classification et désignation - Coefficient global de service (de calcul) (ISO 12162:1995)
Ta slovenski standard je istoveten z: EN ISO 12162:1995
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.

ISO
INTERNATIONAL
STANDARD
First edition
1995-06-01
Thermoplastics materials for pipes and
fittings for pressure applications -
Classification and designation - Overall
Service (design) coefficient
Matieres thermoplastiques pour tubes et raccords pour applications avec
- Coefficient global de Service
- Classifica tion et d&igna tion
Pression
(de calcul)
Reference number
ISO 12162:1995(E)
ISO 12162:1995(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
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 12162 was prepared by Technical Committee
lSO/TC 138, Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 5, Genera/ properties of pipes, fittings and valves of
plastic materials and their accessories - Test methods and basic specifi-
ca tions.
0 ISO 1995
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 Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
0 ISO
ISO 12162:1995(E)
Introduction
ISO/TR 9080 states in 0.2.7 of its introduction that methods for using
and/or aLCL to arrive at the allowable design Stresses still had to be
OLTHS
considered. Service factors or safety factors have to be introduced.
This International Standard uses the lower confidence limit of the long-
term strength, aLCL, as a basis for material classification and designation
and defines the relation with the design stress. The Service factors are
expressed in the Overall Service (design) coefficient. The final Overall ser-
vice (design) coefficients are given in the product or System Standards.
. . .
Ill
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INTERNATIONAL STANDARD 0 ISO ISO 12162:1995(E)
Thermoplastics materials for pipes and fittings for
- Classification and
pressure applications
designation - Overall Service (design) coefficient
lSO/TR 9080:1992, Thermoplastics pipes for the
1 Scope
transport of fluids - Methods of extrapolation of
hydrostatic stress rupture data to determine the
This International Standard establishes the classi-
long-term hydrostatic strength of thermoplastics pipe
fication of thermoplastics materials in pipe form and
ma terials.
specifies the material designation. lt also gives a
method for calculating the design stress.
3 Definitions
lt applies to materials intended for pipes and/or fit-
tings for pressure applications.
For the purposes of this International Standard, the
following definitions apply.
The classification, the material designation, and the
calculation method are based on the resistance to
3.1 lang-term strength at 20 “C for 50 years,
internal pressure with water at 20 “C in water for
Quantity with the dimensions of stress, in
OLTHS’
50 years, derived by extrapolation using the method
megapascals, which tan be considered as a property
given in lSO/TR 9080.
of the material and represents the 50 % lower confi-
dence limit for the Iong-term
...