CEN/TR 16017:2010

SLOVENSKI STANDARD
01-november-2010
Vodilo za uporabo EN 598
Guide to the use of EN 598
Hinweise zur Anwendung von EN 598
Guide pour l'utilisation de l'EN 598
Ta slovenski standard je istoveten z: CEN/TR 16017:2010
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.040.40 Kovinski fitingi Metal fittings
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CEN/TR 16017
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
September 2010
ICS 23.040.40; 23.040.10
English Version
Guide to the use of EN 598
Guide pour l'utilisation de l'EN 598 Hinweise zur Anwendung von EN 598

This Technical Report was approved by CEN on 20 March 2010. It has been drawn up by the Technical Committee CEN/TC 203.

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.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 16017:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Scope .4
5.6 Flanged joints .5
5.7 Pipes with screwed or welded flanges .5
6.7 Zinc mass .5
7 Performance test methods .6
7.1 Compressive strength of the cement mortar lining .6
7.2 Longitudinal bending of pipes .6
7.3 Diametral stiffness of pipes .6
7.4 Leak tightness of components for gravity pipelines .7
7.5 Leak tightness of flexible joints to positive internal pressure .7
7.6 Leak tightness of flexible joints to negative internal pressure .8
7.7 Leak tightness of flexible push-in joints to positive external pressure .8
7.8 Leak tightness of flexible joints to dynamic internal pressure .8
7.9 Chemical resistance to effluents .8
7.10 Abrasion resistance .8
9 Evaluation of conformity .8
9.1 General .8
Annex E – Root penetration .9
Annex ZA and CE marking . 10
Bibliography . 11

Foreword
This document (CEN/TR 16017:2010) has been prepared by Technical Committee CEN/TC 203 “Cast iron
pipes, fittings and their joints”, the secretariat of which is held by AFNOR.
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.
EN 598 deals with components of piping systems for sewerage – pipes, fittings, accessories and joints –
which together, form the part of a sewerage network. Each of these components can be manufactured by a
different supplier, which is often the reality; the performances and the tests required by EN 598, although
perfectly comprehensive, are not always formulated with enough accuracy to be easily used in every real
situation occurring in the market.
In regard to quality assurance, the attestations and certifications of conformity to the standards available on
the markets:
attestation of compliance to the performance tests;
certification of conformity of the products of a batch;
certification of conformity to EN ISO 9001 of the supplier;
national quality or conformity marks;
third party certification of conformity of products to a standard;
self-declaration of conformity to a standard by the supplier for products that he sells,
have different meanings for the customer, who generally needs all products to be fully in compliance with this
standard.
In addition EN 598 is now a harmonized standard prepared under the Mandate M/131 “Pipes, tanks and
ancillaries not in contact with water intended for human consumption” and as such products should be CE
marked.
Scope
EN 598 specifies the requirements and associated test methods applicable to ductile iron pipes, fittings,
accessories and their joints for the construction of drains and sewers outside buildings:
 operating without pressure (gravity sewerage), or with positive or negative pressure;
 to be installed below or above ground;
 to convey surface water, domestic waste water and certain types of industrial effluents, either in separate
systems or in combined systems.
This technical report:
 explains in more detail the process of testing for the performance tests;
 explains in more detail the benefits of high alumina cement lining;
 explains in more detail the definitions of the different types/levels of attestation to enable customers to
ensure their requirements are fulfilled;
 explains in more detail the ways of certification of conformity with EN 598 for a reliable evaluation of the
performance of products;
 explains in more detail CE marking and its relevance i.e. the CE mark is not a mark of conformity with a
standard but only a self-declaration concerning the CPD essential requirements.
In order to make the use of this Technical Report easier, the clauses of this document refer to the
corresponding clause numbers in EN 598.
4.1.3.1 Gasket materials
Gaskets for sewerage application are manufactured from rubber in compliance with EN 681-1 type WC or
WG. This ensures that the gasket is unaffected by any hydro-carbons discharged from the sewerage
environment. In addition, the designated rubber offers the required resistance to benzene derivatives, such as
those contained in oily waste.
4.4.3 Internal lining of high alumina cement mortar
Ductile iron pipes for sewerage applications are internally lined with high alumina cement mortar as standard
thus protecting the internal surface of the ductile iron pipes against corrosion and tuberculation. High alumina
cement lining provides a high resistance to both chemical and septic (biogenic corrosion of cement mortar
lining) attack found in the vast majority of sewers. Similarly, it offers excellent resistance to abrasion brought
about by the impact of solid particles contained in the effluent. The performance of both of these is ensured by
the tests detailed in EN 598 sub-clauses 5.8 Chemical resistance and 5.9 Abrasion resistance.
Linings with a high compressive strength (min 50 MPa - see 5.10), also exhibit high density, good adhesion
and low porosity: all of which parameters are conducive to a long working life.
4.4.4 Coating of joint areas
A possible area of weakness in the corrosion protection in sewer systems could be where the conveyed
sewage comes into contact with the “external coating” of the pipe i.e. internal surface of the socket and the
external surface of the spigot in the joint area. This is not the case with EN 598 pipes where the joint areas of
ductile iron pipes (internal surface of the socket and external surface of the spigot) for sewerage applications
are coated with a synthetic resin (epoxy, polyurethane etc.). These coatings conform without failure to the
stringent test for chemical resistance to effluents of EN 598 sub-clause 5.8. This ensures that the surface in
contact with the effluent does not crack, blister or disbond for the life of the sewer, preventing the onset of
biogenic corrosion.
5.6 Flanged joints
The test for flanged joints shall be carried out in accordance with EN 545 on an assembly comprising two
pipes or fittings with identical flanges together with a relevant gasket and bolts recommended by the
manufacturer. It is important that rubber gaskets shall be shown to have the short and long term properties as
defined in EN 681-1, in particular the hardness (IRHD) is within specification. Similarly, it is important that the
manufacturer’s jointing instructions are followed for each particular gasket/material as regards torque values
and lubrication for the bolts. The sealing of flange joints depends on many factors and the manufacturer
should have written specifications for:
 flange joint faces – surface finish, flatness, permissible irregularities;
 flange jointing materials – bolt lengths/grades, recommended gasket materials;
 jointing instructions – bolt torques, lubrication, bolt tightening sequence.
5.7 Pipes with screwed or welded flanges
The test for pipes with screwed or welded flanges shall be carried out in accordance with EN 545 on an
assembly comprising two pipes with identical flanges together with a relevant gasket and bolts. This test is
primarily a strength test for the weld/screwed connection and as such is very demanding.
Because this is a specialist test on pipes that can only be welded/screwed by the manufacturer, the test can
usually only be carried out and third party accredited in the factory.
6.7 Zinc mass
EN 598 requires that a rectangular token of known weight per unit area shall be attached longitudinally along
the axis of the pipe before passing through the coating equipment. After zinc coating and trimming, the size of
the token shall be 500 mm × 50 mm. It shall be weighed on a scale having an error limit of ± 0,01 g. The mean
mass is determined in accordance with the remainder of EN 598 sub-clause 6.7.
As this test can only be carried out in the factory, conformity certification using this test method can only be
acquired and granted in the factory during the manufacturing process and not on a batch of finished products.
7 Performance test methods
7.1 Compressive strength of the cement mortar lining
This test should be carried out using the actual constituents used in the manufacture of the cement mortar for
the pipes. As such the sand, cement and water should be sampled from the dispensing/holding facilities in the
factory. Similarly, the sand/cement/water ratios should be identical to those used in the manufacturing process
(in the case of the sprayed mortar process, these ratios are identical to the ratio in the mortar mixer, whereas
for the centrifugal process, these ratios are those found in the compacted lining after centrifugal spinning).
Third party accreditation can thus only be granted once these strict conditions have been established and it is
for this reason that it is recommended that these tests are only carried out in the factory.
7.2 Longitudinal bending of pipes
This test is only applicable to pipes with an aspect ratio (length/diameter) equal to or greater than 25; for
EN 598 this applies to DN 80 to DN 200 pipe.
Longitudinal bending strength is important for both above and below ground installations:
 above ground pipes are used for river crossings and installed on piers in terrain where trenching is
impossible or expensive;
 below ground pipes can be subjected to beam loading when poorly installed with lack of support from the
bed or from disturbance from second comer installation and in unstable ground subject to subsidence or
earthquakes. Also, the inherent longitudinal bending strength of the pipes ensures that there is no
sagging of the pipes maintaining the pipeline gradient for flow of sewerage in gravity mains. Similarly, the
longitudinal rigidity eliminates troughs where sewerage could stagnate in low flow gravity mains.
Ductile iron pipes can absorb considerable deflection of the pipe barrel (e.g. possible ground movement)
without damage because of the material’s high inherent beam strength. The stringent test detailed in EN 598
sub-clause 7.2 is in two parts:
bending moments equivalent to those encountered in service are applied; the pipe is checked to verify
that there is no residual deflection or damage to the external coating and internal lining;
the same pipe is then subjected to bending moments equivalent to 1.7 times greater than its intended
service
...