SIST EN ISO 3127:2018

SLOVENSKI STANDARD
01-januar-2018
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SIST EN 744:1997
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Thermoplastics pipes - Determination of resistance to external blows - Round-the-clock
method (ISO 3127:1994)
Rohre aus Thermoplasten - Bestimmung der Widerstandsfähigkeit gegen äußere
Schlagbeanspruchung - Umfangsverfahren (ISO 3127:1994)
Tubes en matières thermoplastiques - Détermination de la résistance aux chocs
extérieurs - Méthode autour du cadran (ISO 3127:1994)
Ta slovenski standard je istoveten z: EN ISO 3127:2017
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3127
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2017
EUROPÄISCHE NORM
ICS 23.040.20 Supersedes EN 744:1995
English Version
Thermoplastics pipes - Determination of resistance to
external blows - Round-the-clock method (ISO 3127:1994)
Tubes en matières thermoplastiques - Détermination Rohre aus Thermoplasten - Bestimmung der
de la résistance aux chocs extérieurs - Méthode autour Widerstandsfähigkeit gegen äußere
du cadran (ISO 3127:1994) Schlagbeanspruchung - Umfangsverfahren (ISO
3127:1994)
This European Standard was approved by CEN on 19 September 2017.

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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3127:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 3127:1994 has been prepared by Technical Committee ISO/TC 138 “Plastics pipes,
fittings and valves for the transport of fluids” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 3127:2017 by 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 April 2018, and conflicting national standards shall be
withdrawn at the latest by October 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 744:1995.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 3127:1994 has been approved by CEN as EN ISO 3127:2017 without any modification.
INTERNATIONAL
ISO
STANDARD
Second edition
1994-12-01
Thermoplastics pipes - Determination of
resistance to external blows -
Round-the-clock method
Tubes en mati&es thermoplastiques - Determination de Ia r&istance aux
chocs extkieurs - M&hode autour du cadran
Reference number
ISO 3127:1994(E)
ISO 3127:1994(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 3127 was prepared by Technical Committee
lSO/TC 138, Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 5, Genera/ properties.
This second edition cancels and replaces the first edition (ISO 31279 980),
which has been technically revised.
Annexes A and B of this International Standard are for information only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized tn any form or by any means, electronie or mechanical, rncluding photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardiza tion
Case postale 56 l CH-l 2 11 Geneve 20 0 Swi tzerland
Printed in Switzerland
ii
INTERNATIONAL STANDARD o ISO ISO 3127:1994(E)
Thermoplastics pipes - Determination of resistance to
external blows - Round-the-clock method
circumference of the test piece. The true impact rate
1 Scope
(TIR) of the batch, or production run from an extruder,
This International Standard specifies a method for the
is estimated.
determination of the resistance to extemal blows of
thermoplastics pipes of circular Cross-section; it is
The severity of this test method tan be adjusted by
called the round-the-clock method.
changing the mass of the striker and/or by changing
the drop height. lt is not technically correct to vary the
This method is applicable to isolated batches of pipe
severity of the test by choosing values of the TIR
tested at 0 “C (information is also given for sampling
other than those specified below.
from the continuous production of Pipe).
The maximum value acceptable for the TIR is taken to
NOTE 1 If testing below 0 “C is required, a temperature of
belO%.
- 20 “C is recommended.
NOTE 3 lt should be appreciated that a completely
definitive result tan be reached only by testing the whole
2 Definitions batch, but in practice a balance is necessary between the
statistical possibility of a definitive result and the tost of
For the purposes of this International Standard, the
further testing.
following definitions apply.
2.1 true impact rate (TIR): The total number of
4 Apparatus
failures divided by the total number of blows, as a
percentage, as if the whole batch had been tested.
4.1 Falling-weight testing machine, incorporating
the following basic components (see figure 1).
NOTE 2 In practice, test pieces are drawn at random from
the batch and the result is only an estimate of the TIR for
that batch.
4.1.1 Main frame, with guide rails or a guiding tube
rigidly fixed in the vertical Position, to accommodate a
striker (4.12) and release it to fall vertically and freely.
Unless otherwise specified in the
2.2 failure:
When calibrated, the Speed of the striker at the
product Standard, shattering or any Crack or Split on
moment of impact shall be not less than 95 % of the
the Inside of the pipe that was caused by the impact
theoretical Speed.
and that tan be seen by the naked eye (lighting
devices may be used to assist in examining the
specimens).
4.1.2 Striker, having a nose comprising all or part of
a hemisphere, combined with a cylindrical stem at
Indentation of the test piece is not considered a
least 10 mm long, and having dimensions conforming
failure.
to figure 2 and table 1, depending upon the mass of
the striker. The mass of the striker, including any
associated weights, shall be selected from the values
given in table 2. Below the Stern, the nose shall be of
3 Principle
steel with a minimum wall thickness of 5 mm and the
striking surface shall be free from visible imperfec-
Test pieces are subjected to blows from a falling
tions such as scratches or dents which may influence
striker, of specified mass and shape, dropped from a
the results.
known height onto specified positions around the
ISO 3127:1994(E)
0 ISO
Dimensions in metres
.,- Guide
Graduated scale,verticaLLy adjustable
for different sizes of pipe
- Channel section
A
ILD-
Enlarged view
- Striker
A
Testpiece
*
/- 120" V-block
Figure 1 - Diagrammatic representation of impact-testing machine

ISO 3127:1994(E)
0 ISO
Dimensions in millimetres
- ~-
\ 4
R*
.
.-
E
r
a) Type d25 (for strikers of mass 0,s kg and 0,8 kg)
I I
I I
b) Type d90 (for strikers of mass equal to or greater than Ikg)
Figure 2 - Noses of the strikers (see table 1)
Table 2 - Recommended masses of strikers
Strikers with 0,5 kg and 0,8 kg mass shall have a type
d25 nose. Strikers with greater masses shall have a
Masses in kilograms
type d90 nose.
0,5 15 4,O IO,0
Dimensions for the nose of the striker
Table 1 -
018 28 5,O 12,5
Dimensions in millimetres
LO 2,5 6,3 16,O
1,25 3,2 80
Type 1 & j pl 1 ds / ao
(
NOTE
- The permissible tolerante on the mass of a
striker shall be f 0,5 %.
I
0 ISO
ISO 3127:1994(E)
pipes with outside diameters less than or equal to
4.1.3 Rigid test support, consisting of a 120’
40 mm, only one blow per test piece shall be made.
V-block at least 200 mm long, positioned so that the
vertical projection of the Point of impact of the falling
striker is within 2,5 mm of the axis of the V-block (see
Table 3 - Number of equidistant lines to be
figure 1).
drawn on test pieces
Nominal outside diameter
4.1.4 Release mechanism, such that the striker tan
Number of equidistant
of pipe
fall from a variable height which tan be adjusted to
lines to be drawn
any height up to at least 2 m, as measured from the
mm
top surface of the test piece, with an accuracy of
s40
+lOmm.
50 3
63 3
75 4
5 Test pieces
90 4
Test pieces of length 200 mm i: 10 mm shall be tut 110 6
from pipe selected at random from the batch, or the
125 6
production run from an extruder.
140 8
160 8
The tut ends shall be Square to the axis of the Pipe,
180 8
clean and free from darnage.
200 12
For pipes with outside diameters greater than 40 mm,
225 12
a
...