EN ISO 13478:1997
(Main)Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack propagation (RCP) - Full-scale test (FST) (ISO 13478:1997)
Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack propagation (RCP) - Full-scale test (FST) (ISO 13478:1997)
IEC 61158-3-2:2014 defines the services provided to the Type 2 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model and systems management at the boundary between the data-link layer and systems management of the fieldbus reference model. Type 2 DL-service provides both a connected and a connectionless subset of those services specified in ISO/IEC 8886. This second edition cancels and replaces the first edition published in 2007. It constitutes a technical revision. The main changes are: Correction of references for fixed tag usage in 4.6.3.6. and update of core bibliographic references (original source documents from consortium)
Rohre aus Thermoplasten für den Transport von Fluiden - Bestimmung des Widerstandes gegenüber schneller Rißfortpflanzung - Praxistest (FST) (ISO 13478:1997)
Tubes en matières thermoplastiques pour le transport des fluides - Détermination de la résistance à la propagation rapide de la fissure (RCP) - Essai grandeur nature (FST) (ISO 13478:1997)
L'IEC 61158-3-2:2014 définit les services fournis à la couche application de bus de terrain Type 2 au niveau de la frontière entre les couches application et liaison de données du modèle de référence de bus de terrain et à la gestion des systèmes au niveau de la frontière entre la couche liaison de données et la gestion des systèmes selon le modèle de référence de bus de terrain. Le service DL de type 2 fournit à la fois un sous-ensemble connecté et sans connexion des services spécifiés dans l'ISO/CEI 8886. Cette deuxième édition annule et remplace la première édition parue en 2007. Cette édition constitue une révision technique. Les modifications majeures sont: Correction des références pour l'utilisation des balises fixes en 4.6.3.6. et Mise à jour des principales références bibliographiques (source d'origine - documents du consortium).
Plastomerne cevi za transport fluidov - Ugotavljanje odpornosti proti hitremu širjenju razpoke (RCP) - Preskus polnega obsega (Full-scale test - FST) (ISO 13478:1997
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13478:1999
01-julij-1999
Plastomerne cevi za transport fluidov - Ugotavljanje odpornosti proti hitremu
širjenju razpoke (RCP) - Preskus polnega obsega (Full-scale test - FST) (ISO
13478:1997
Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid
crack propagation (RCP) - Full-scale test (FST) (ISO 13478:1997)
Rohre aus Thermoplasten für den Transport von Fluiden - Bestimmung des
Widerstandes gegenüber schneller Rißfortpflanzung - Praxistest (FST) (ISO 13478:1997)
Tubes en matieres thermoplastiques pour le transport des fluides - Détermination de la
résistance a la propagation rapide de la fissure (RCP) - Essai grandeur nature (FST)
(ISO 13478:1997)
Ta slovenski standard je istoveten z: EN ISO 13478:1997
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
SIST EN ISO 13478:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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INTERNATIONAL ISO
STANDARD 13478
First editisn
1997-05-0 1
Thermoplastics pipes for the conveyance of
fluids - Determination of resistance to
rapid Crack propagation (RCP) - Full-scale
test (FST)
Tubes en matikes thermoplastiques pour Ie transport des fluides -
Defermination de Ia rkistance 6 Ia propagation rapide de
Ia fissure (KP) - Essai grandeur nature (FST)
Reference number
ISO 13478: 1997(E)
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ISO 13478: 1997(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, governmentaj and non-
governmental, in liaison with ISO, also take patt 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 13478 was prepared by Technical Committee
ISOfTC 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
specifica tions.
Annexes A and B form an integral patt of this International Standard.
0 ISO 1997
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-121 1 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
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~~~
INTERNATIONAL STANDARD @ ISO ISO 13478: 1997(E)
Thermoplastics pipes for the conveyance of fluids -
Determination of resistance to rapid Crack propagation (RCP) -
Full-scale test (FST)
1 Scope
This International Standard specifies a full-scale method of test for determination of arrest or propagation of a Crack
initiated in a thermoplastics pipe at a specified temperature and internal pressure.
lt is applicable to the assessment of the Performance of thermoplastics pipes intended for the supply of gases or
liquids, in the latter case when air may also be present in the Pipe.
2 Normative references
The following Standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All Standards are subject to
revision, and Parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the Standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 1167:1996, Thermoplastics pipes for the conveyance of fluids - ßesistance to internal pressure - Test
method.
ISO 3126:i 974, Plastics pipes - Measurement of dimensions.
ISO 11922-1 :1997, Thermoplastics pipes for the conveyance of fluids - Dimensions and tolerantes - Parf 1:
Metric series.
3 Definitions
For the purposes of this International Standard, the definitions given in ISO 11922-1 apply.
4 Principle
A thermoplastics Pipe, maintained at a specified temperature and containing a fluid at a specified test pressure, is
subjected to an impact designed to initiate a Crack.
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@ ISO
ISO 13478: 1997(E)
The test temperature and test pressure are as defined in the referring Standard.
The fluid is identical to that used in the intended application, or is a Substitute fluid which gives equivalent results.
which do not retard the rate of
The test simulates the Performance of a buried pipe in Service u nder conditions
decompression of t lressurizing fluid through any fracture.
he P
The pipe is subsequently examined to determine whether arrest or propagation of the Crack has occurred.
From a se ries of su ch tests at different pressures but at constant temperature , a critical pressure or critical stress
for crac ropaga tio n tan be determined (see annex A for further information).
:k P
Similarly, by testing at a series of temperatures whilst maintaining a constan t pressure or hoop stress, the criticai
temperature for Crack propagation tan be determ ined (see annex B fo r further information).
5 Test Parameters
lt is assumed that the following Parameters will be set by the referring product Standard:
a) the diameter and series of the Pipe(s) to be tested;
b) the pressurizing fluid (6.4), e.g. gas, water, water plus air;
c) the test pressure(s);
d) the test temperature(s).
6 Materials
6.1 Methylated spirits, for use as a cooling fluid (see 7.4.3).
6.2 Solid carbon dioxide, for use as a cooling agent (see 7.4.3).
6.3 Washed gravel, with a size range of 20 mm to 40 mm diameter (see clause 9).
6.4 Pressurizing fluid, which shall be as specified in the referring Standard.
NOTES
1 It is satisfactory to use nitrogen or air as the pressurizing fluid instead of natura1 gas, as the measured pressure for rapid
Crack propagation (RCP) will be only slightly less than that obtained with natura1 gas. The decompression Speed (velocity of
Sound) at 0 “C of nitrogen and air is 337 m/s and 334 m/s, respectively, compared with approximately 430 m/s for natura1 gas.
2 In water-Pipeline Systems which contain water only, the phenomenon of Crack propagation is unlikely to occur. However,
when entrained air bubbles or air pockets are present it is possible. lt is usual to test with between 5 % and 10 % by volume of
air in the water to determine the resistance to Crack propagation. A test on water pipe using 100 % gas or air should be
expected to give a pessimistic result.
7 Apparatus
7.1 Temperature-controlled trough, capable of accommodating the minimum test-pipe length of 14 m. The
trough shall have means for maintaining the temperature specified by the referring Standard to within + 1,5 “C along
the whole test-pipe length by means of a water-recirculation System around the test pipe (see figure 1). If
necessary, the water shall contain an antifreeze to avoid ice build-up round the test Pipe.
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ISO 13478: 1997(E)
. . .
Steel-pipe reservoir r GraveL ~~~~~~~~~~ Jo ’nts /- Initiation rig
22m
e c
L 14 m
L 28 m
- F
Fs
Pneumatic Piston
L
Figure 1 - Example sf a test facility for full-scale rapid Crack propagation
7.2 Steel-pipe reservoir, connected to the test pipe at one end of the trough. The steel pipe shall have a bore
diameter equal to or greater than the test-pipe bore diameter. The pipe reservoir shall have a minimum length of
twice that of the test pipe and a minimum volume of three times that of the test Pipe.
7.3 Pressurization equipment, for pressurizing the test pipe and steel resetvoir (7.2) with the test fluid (6.4) to
within + 2 % of the test pressure specified by the referring Standard.
7.4 Crack-initiation equipment.
7.4.1 Router, capable of machining a longitudinal groove to an appropriate depth in the test-pipe wall for
approximately 500 mm and then gradually decreasing the groove depth to zero over approximately 250 mm (see
figure 2).
7.4.2 Metal blade, which tan be aligned with the external groove in the test pipe and be driven through the
residual Pipe-Wall thickness.
NOTE - A 400-mm-long steel blade driven by a fast-acting pneumatic Piston has been found to be suitable for polyethylene
pipe (see figure 3).
Dimensions in millimetres
Figure 2 - Groove machined in external pipe wall
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@ ISO
ISO 13478: 1997(E)
Cooling System, designed to apply methylated spirits cooled by solid carbon dioxide to the top of the pipe to
7.4.3
cool a Strip of pipe either side of the groove and approximately 1 m in the direction of the steel-pipe reservoir. It is
recommended to use a wooden frame, resting on the top of the pipe and lined with a thin polyethylene sheet, to
contain the cooling fluid (see figure 4).
7.4.4 Close-fitting wooden plug, approximately 0,5 m long, to support the test pipe internally beneath the groove
sufficiently to prevent severe pipe distortion during Crack initiation (see figure 4).
The top sf the wooden plug shall have a recess containing compressible foam. The foam shall be compressed to
maintain close contact with the pipe bore beneath the groove, even during pressurization. This will ensure that the
wooden plug stays in Position. Moreover, it will enable the full thickness of the groove ligament to be properly cooled
by the cooling fluid (see 7.4.3) by insulating this patt of the pipe bore from the pressurizing fluid.
Dimensions in millimetres
400
-
1
200
-
e
NOTE - Blade sharpened by light grinding.
Figure 3 - Steel blade found to be suitable for initiating a Crack in polyethylene pipe
Pneumatic cylinder
r-_1
Cooling fluid
H---- Blade
Polyethylene sheet
/------ Machined groove
Wooden trough
L Compressible foam
L Wooden plug
Wooden support
y if required
Pipe
Position
Figure 4 - Example of the Crack-initiation
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@ ISO
ISO 13478:1997(E)
8 Test-pipe preparation
If required, joint straight sections of pipe together by butt fusion to produce a test pipe of minimum length 14 m.
Measure the Iocation of any butt-fusion joint.
Insert the wooden plug (7.4.4) and locate it underneath the Position where the groove will be produced. The centre
of the groove shall be at least 2 m from the pipe end.
Fit, to the end of the test pipe nearest the groove, an end cap which will withstand the end load from the test
pressure (see figure 1).
Lay the test pipe in the trough and connect the other end of the test pipe to the steel-pipe reservoir (7.2). Ensure
visually that the test pipe is straight.
Within the Zone supported by the wooden plug, use the router to machine, in the external surface of the test Pipe, a
longitudinal groove having a depth which is constant f
...
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