CEN/TR 15729:2010

SLOVENSKI STANDARD
01-december-2010
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Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) based on
unsaturated polyester resin (UP) - Report on the determination of mean abrasion after a
defined number of test cycles
Kunststoff-Rohrleitungssysteme - Glasfaserverstärkte duroplastische Kunststoffe (GFK)
auf der Grundlage ungesättigten Polyesterharzes (UP) - Bericht über die Bestimmung
des mittleren Abriebs nach einer festgelegten Anzahl von Durchläufen
Systèmes de canalisations en plastique - Plastiques thermodurcissables renforcés par
du verre (PRV) à base de résine de polyester non saturé (UP) - Rapport sur la
détermination de l'abrasion moyenne après un nombre défini de cycles d'essai
Ta slovenski standard je istoveten z: CEN/TR 15729:2010
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
83.120 2MDþDQLSROLPHUL Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CEN/TR 15729
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
August 2010
ICS 23.040.20
English Version
Plastics piping systems - Glass-reinforced thermosetting plastics
(GRP) based on unsaturated polyester resin (UP) - Report on
the determination of mean abrasion after a defined number of
test cycles
Systèmes de canalisations en plastique - Plastiques Kunststoff-Rohrleitungssysteme - Glasfaserverstärkte
thermodurcissables renforcés par du verre (PRV) à base de
duroplastische Kunststoffe (GFK) auf der Grundlage
résine de polyester non saturé (UP) - Rapport sur la ungesättigten Polyesterharzes (UP) - Bericht über die
détermination de l'abrasion moyenne après un nombre Bestimmung des mittleren Abriebs nach einer festgelegten
défini de cycles d'essai Anzahl von Durchläufen

This Technical Report was approved by CEN on 26 June 2010. It has been drawn up by the Technical Committee CEN/TC 155.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

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© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 15729:2010: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
Introduction . 4
1 Scope . 5
2 Terms and definitions . 5
3 Principle . 5
4 Apparatus. 6
5 Abrasive . 6
6 Test-pieces . 7
7 Conditioning . 7
8 Procedure. 7
9 Evaluation . 9
10 Test report. 9
Bibliography . 11

Foreword
This document (CEN/TR 15729:2010) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
Introduction
The procedure described in this Technical Report is intended to be used as a means of assessing and
comparing the performance of GRP pipes after being subject to a specified regime of abrasion. The main
difference between this regime and other similar procedures is the use of a graded man-made abrasive,
Corundum.
The specification of the abrasive, ISO 8486-1, specifies the designation and determination of grain size
distribution of fused aluminium oxide, silicon carbide and other abrasive materials for bonded abrasives and
for general industrial applications. This document, which is indispensable for the application of the proposal, is
an ISO standard, which is recognised by the abrasive manufacturing industry throughout the world. The use of
corundum addresses some of the vital issues for abrasion testing, namely particle shape or structure by being
a man-made material with consistent chemical formulation and fracture characteristics.
The abrasive to be used, i.e. corundum, a crystalline oxide of aluminium that has crystallized in a Trigonal
system, may not be similar to some materials found in sewer piping systems but is used because of its
availability world-wide and thereby ensures the consistency of the abrasive used in the test. The test is not
intended to simulate any particular conditions in piping systems for which pipes conforming to EN 14364 are
intended to be used but is merely intended to be a reproducible test procedure for use in a testing laboratory
that can be used to provide data for the assessment of abrasion resistance.
GRP pipes complying with EN 14364 have not been found to be susceptible to abrasion in typical sewerage or
drainage applications. In the small number of situations where abrasion has been found to be a problem the
conditions on site are found to be unusual and also difficult to reproduce in a laboratory and this leads to
major difficulties in correlating the performance in the laboratory with those existing on such sites. Data is not
currently available which shows a definite relationship between the test and actual pipe operation. However
data obtained from this test could be used to establish the relationship if it exists.
With the limited amount of testing already carried out it is considered that there is an improvement in
repeatability of the test compared to DIN 19565-1 (no longer published) and testing is continuing to confirm
these early findings.
1 Scope
This Technical Report describes a method for determining the mean abrasion of the inner surface of glass-
reinforced thermosetting polyester resin (GRP) pipes conforming to EN 14364, measured after a defined
number of test cycles of a specified water/abrasive mixture.
NOTE The test is performed on a semi-circular channel-pipe test-piece.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
abrasion
a
reduction in wall thickness, along the test length at the invert of the channel-pipe test-piece, caused by the test
piece being abraded by abrasive during a number of test cycles
NOTE It is expressed in millimetres (see Clause 9).
2.2
abrasive
particles of a specified inorganic material (i.e. corundum), which is used for abrading the inner surface of the
test-piece
2.3
corundum
crystalline oxide of aluminium (Al O ), that has crystallized in a Trigonal system
2 3
NOTE Corundum has a hardness which is next to diamond, which accounts for its use as an abrasive.
2.4
mean abrasion
a
mean
mean value of the set of data recording the reduction in wall thickness at predefined points along the test
length at the invert of the channel test-piece
NOTE It is expressed in millimetres (see Clause 9).
2.5
test cycle
cycle which is a double traverse of the abrasive along the test length at the invert of the test piece, caused by
the test piece covering an angle from either + 22,5° to - 22,5° or - 22,5° to + 22,5° and then returning to the
starting position
NOTE See Figure 1.
3 Principle
A semi-circular channel pipe, with a length of (1 000 ±
...