prEN 877 rev

Cast iron pipes and fittings, their joints and accessories for the evacuation of water from buildings - Requirements, test methods and quality assurance

This European Standard applies to cast iron pipeline components used for the construction of discharge systems for buildings and of drains, normally as gravity systems. The range of nominal sizes extends from DN 40 to DN 600 inclusive. This standard specifies the requirements for the materials, dimensions and tolerances, mechanical properties, appearance, standard coatings  and quality assurance for cast iron pipes, fittings and accessories. It also indicates performance requirements for all components, including joints.

Rohre und Formstücke aus Gußeisen, deren Verbindungen und Zubehör zur Entwässerung von Gebäuden - Anforderungen, Prüfverfahren und Qualitätssicherung

Diese Europäische Norm gilt für Rohrleitungsteile aus Gusseisen zur Erstellung von Gebäudeentwässerungs-systemen sowie von Grundstücksentwässerungssystemen, normalerweise als Schwerkraftsysteme, aber auch als Unterdrucksysteme, innerhalb und außerhalb von Gebäuden, ober  und unterirdisch.
Der Nennweitenbereich umfasst DN 40 bis einschließlich DN 600.
Diese Norm enthält Anforderungen an Werkstoffe, Maße und Grenzabmaße, mechanische Eigenschaften, Beschaffenheit und Norm-Beschichtungen für gusseiserne Rohre, Formstücke und Zubehörteile. Sie enthält ferner Funktionsanforderungen für alle Bauteile einschließlich der Verbindungen. Die Qualitätssicherung ist in einem informativen Anhang enthalten.
Sie gilt für Rohre, Formstücke und Zubehörteile, die im Gießverfahren, gleich welcher Art, erzeugt oder aus Gussteilen hergestellt werden, und für die entsprechenden Verbindungen.
Die Dachabläufe, die in Überlaufsystemen eingesetzt werden, sind nach dieser Norm nicht relevant.

Tuyaux et raccords en fonte, leurs assemblages et accessoires destinés à l'évacuation des eaux des bâtiments - Prescriptions, méthodes d'essais et assurance qualité

La présente Norme européenne s’applique aux composants de canalisations en fonte utilisés pour la construction des réseaux d’évacuation des bâtiments et des branchements d’assainissement, normalement en évacuation gravitaire mais aussi sous vide, à l’intérieur et à l’extérieur des bâtiments, aériens ou enterrés.
La gamme des diamètres nominaux s’étend du DN 40 au DN 600 inclus.
La présente norme spécifie les prescriptions pour les matériaux, les dimensions et les tolérances, les propriétés mécaniques, l’aspect, les revêtements standards des tuyaux, raccords et accessoires en fonte. Elle indique également des prescriptions de performance pour tous les composants, y compris les assemblages. L’assurance qualité est couverte par une annexe informative.
Elle traite des tuyaux, raccords et accessoires moulés par tout procédé de fonderie ou fabriqués à partir de composants moulés, ainsi que des assemblages correspondants.
Les avaloirs de toiture utilisés pour les réseaux siphoïdes ne sont pas couverts par la présente norme.

Cevi, fitingi in pribor iz litega železa za hišne vodne odtoke - Zahteve, preskusne metode in zagotavljanje kakovosti

General Information

• Status: Not Published
• Publication Date: 04-May-2014
• ICS: 23.040.05 - Pipeline and its parts for external sewage systems
• ICS: 23.040.10 - Iron and steel pipes
• ICS: 23.040.40 - Metal fittings
• Technical Committee: CEN/TC 203 - Cast iron pipes, fittings and their joints
• Drafting Committee: CEN/TC 203/WG 3 - Soil pipelines
• Current Stage: 3098 - Decision to reject - Consensus building
• Completion Date: 10-Feb-2017
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/131 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on pipes, tanks and ancillaries, not in contact with water intended for human consumption
• Ref Project: oSIST prEN 877:2012 - Cast iron pipes and fittings, their joints and accessories for the evacuation of water from buildings - Requirements, test methods and quality assurance

Relations

• Revises: EN 877:1999 - Cast iron pipes and fittings, their joints and accessories for the evacuation of water from buildings - Requirements, test methods and quality assurance
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 877:2012
01-maj-2012
Cevi, fitingi in pribor iz litega železa za odtok vode iz stavb - Zahteve, preskusne
metode in zagotavljanje kakovosti
Cast iron pipes and fittings, their joints and accessories for the evacuation of water from
buildings - Requirements, test methods and quality assurance
Rohre und Formstücke aus Gusseisen, deren Verbindungen und Zubehör zur
Entwässerung von Gebäuden - Anforderungen, Prüfverfahren und Qualitätssicherung
Tuyaux et raccords en fonte, leurs assemblages et accessoires destinés à l'évacuation
des eaux des bâtiments - Prescriptions, méthodes d'essais et assurance qualité
Ta slovenski standard je istoveten z: prEN 877 rev
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.040.40 Kovinski fitingi Metal fittings
91.140.80 Drenažni sistemi Drainage systems
oSIST prEN 877:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 877:2012


EUROPEAN STANDARD
DRAFT
prEN 877 rev
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2012
ICS 23.040.10; 23.040.40 Will supersede EN 877:1999
English Version
Cast iron pipes and fittings, their joints and accessories for the
evacuation of water from buildings - Requirements, test methods
and quality assurance
Tuyaux et raccords en fonte, leurs assemblages et Rohre und Formstücke aus Gusseisen, deren
accessoires destinés à l'évacuation des eaux des Verbindungen und Zubehör zur Entwässerung von
bâtiments - Prescriptions, méthodes d'essais et assurance Gebäuden - Anforderungen, Prüfverfahren und
qualité Qualitätssicherung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 203.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 877 rev:2012: E
worldwide for CEN national Members.

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Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Terms and definitions .6
4 Technical requirements .7
5 Test methods . 22
6 Evaluation of conformity . 37
Annex A (informative) Other dimensions for buried systems . 38
Annex B (informative) Other dimensions for rainwater systems to be installed outside buildings . 39
Annex C (informative) Field of use for buried pipes and fittings, characteristics of soils, load-
bearing capacity. 40
Annex D (normative) Evaluation of conformity . 41
Annex E (informative) Surveillance by an accredited third party (certification by third party) . 48
Annex F (informative) General information on some product characteristics . 51
Annex G (informative) Method of calculation of gross calorific potential of external coatings for
the range, noted PCS range ext. coating . 52
Annex H (normative) Reaction to fire test (SBI adaptation for testing a products range) . 53
Annex ZA (informative) Clauses of the European Standard addressing essential requirements or
other provisions of EU Directives . 56
Bibliography . 62

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Foreword
This document (prEN 877:2012) has been prepared by Technical Committee CEN/TC 203 “Cast iron pipes,
fittings, accessories and their joints”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 877:1999.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
It is one of a series of standards for cast iron products for pipelines for various applications.
It deals with subjects covered by the International Standard ISO 6594. The major difference is the inclusion of
requirements for joints and for product performance.
This standard is in conformity with the general requirements already established by CEN/TC 165 in the field of
waste water engineering, as required by EN 476.
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1 Scope
This European Standard applies to cast iron pipeline components used for the construction of discharge
systems for buildings and of drains, normally as gravity systems but also vacuum systems, inside and outside
buildings, above and below ground.
The range of nominal sizes extends from DN 40 to DN 600 inclusive.
This standard specifies the requirements for the materials, dimensions and tolerances, mechanical properties,
appearance, standard coatings for cast iron pipes, fittings and accessories. It also indicates performance
requirements for all components, including joints. Quality assurance is covered in an informative annex.
It covers pipes, fittings and accessories cast by any foundry process or manufactured by fabrication of cast
components, as well as the corresponding joints.
The roof gullies used for siphonic systems are not relevant from this standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 476:2011, General requirements for components used in drains and sewers.
EN 598:2007+A1:2009, Ductile cast iron pipes, fittings, accessories and their joints for sewerage application -
Requirements and test methods.
EN 605:1992; Paints and varnishes - Standard panels for testing (ISO 1514:1984 modified).
EN ISO 6892-1:2009, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO
6892-1:2009).
EN ISO 6506-1:2005, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1:2005).
EN 10088-1:2005, Stainless steels - Part 1: List of stainless steels.
EN 10088-2:2005, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion
resisting steels for general purposes.
EN 10088-3:2005, Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars,
rods, wire, sections and bright products of corrosion resisting steels for general purposes.
EN 10088-4:2009, Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion
resisting steels for construction purposes.
EN 10088-5:2009, Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and
bright products of corrosion resisting steels for construction purposes.
EN 10204:2004, Metallic products - Types of inspection documents.
EN 45011:1998, Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and
bright products of corrosion resisting steels for construction purposes.
EN ISO 6708:1995, Pipework components - Definition and selection of DN (nominal size) (ISO 6708:1995).
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ISO 185:2005, Grey cast iron – Classification.
EN ISO 898-1:2009 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts,
screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1:2009).
EN ISO 898-2:2008, Plastics - Plasticized poly(vinyl chloride) (PVC-P) moulding and extrusion materials - Part
2: Preparation of test specimens and determination of properties (ISO 2898-2:2008).
ISO 1817:2011, Rubber, vulcanised - Determination of the effect of liquids.
EN ISO 2409:2007, Paints and varnishes - Cross-cut test.
EN ISO 3506-1:2009, Mechanical properties of corrosion-resistant stainless steel fasteners - Part 1: Bolts,
screws and studs (ISO 3506-1:2009).
EN ISO 3506-2:2009, Mechanical properties of corrosion-resistant stainless steel fasteners - Part 2: Nuts (ISO
3506-2:2009)
ISO 2808:2007, Paints and varnishes - Determination of film thickness.
EN ISO 2812-1:2007, Paints and varnishes - Determination of resistance to liquids - Part 1: Immersion in
liquids other than water (ISO 2812-1:2007).
ISO 4628-2:2003; Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and
size of defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering
(ISO 4628-2:2003)
ISO 4628-3:2003, Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and
size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting
(ISO 4628-3:2003)
EN ISO 9227:2006, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227:2006).
ISO 7724-1:1984, Paints and varnishes - Colorimetry - Part 1: Principles.
ISO 7724-2:1984, Paints and varnishes - Colorimetry - Part 2: Colour measurement.
ISO 7724-3:1984, Paints and varnishes - Colorimetry - Part 3: Calculation of colour differences.
EN 681-1, Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage
applications - Part 1: Vulcanized rubber.
EN 13501-1, Fire classification of construction products and building elements - Part 1: Classification using
data from reaction to fire tests.
EN 13823, Reaction to fire tests for building products - Building products excluding floorings exposed to the
thermal attack by a single burning item.
EN ISO 1716, Reaction to fire tests for products - Determination of the gross heat of combustion (calorific
value) (ISO 1716:2010).
EN ISO 9001:2008, Quality management systems - Requirements (ISO 9001:2008)
EN ISO 11925-2, Reaction to fire tests - Ignitability of products subjected to direct impingement of flame - Part
2: Single-flame source test (ISO 11925-2)
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3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
discharge system for buildings
system of pipes, fittings, accessories and joints used to collect and drain waste water and rainwater from a
building; it comprises discharge pipes, stack ventilation and rainwater pipes, installed within the limits of a
building or attached to the building. This includes pipes between the building and the connecting boxes
NOTE This applies to gravity or vacuum, inside and outside buildings, above and below ground.
3.2
drain
system of pipes, fittings, accessories and joints installed outside the limits of a building in order to connect the
discharge system of this building to a sewer or a septic tank
3.3
sewer
system of pipes designed to collect waste water and rainwater from buildings and surface water and to convey
them to the point of disposal or treatment
3.4
cast iron
alloy of iron and carbon in which graphite can be present in different forms
3.5
pipe
casting of uniform bore, straight in axis, normally having plain ends but which can also be socketed
3.6
fitting
cast iron component, other than a pipe, which allows a deviation, a change of direction or diameter, including
flanged and access components
3.7
accessory
any casting other than a pipe or fitting used in a pipeline, e.g. inspection/junction chambers
3.8
joint
connection between the ends of pipes and/or fittings, including the coupling or clamping component, with
sealing effected by elastomeric gasket(s)
3.9
grip collars
securing clamps for pipes subjected to internal pressure, providing axial restrain to end thrust coming from a
change of direction
3.10
nominal size (DN)
an alphanumeric designation of size for components of a pipework system, which is used for reference
purposes. It comprises the letters DN followed by a dimensionless whole number which is indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
[EN ISO 6708]
NOTE In this standard, it is the bore.
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3.11
length
effective length of a pipe or fitting
NOTE For flanged pipes and fittings, the effective length is equal to the overall length. For spigot and socket
pipes and fittings, the effective length is equal to the overall length minus the spigot insertion depth as given in the
manufacturer’s catalogues
3.12
initial type test
proof of design test which is carried out once to demonstrate compliance with the requirements of this
standard and which is repeated only after significant change in manufacture, design or material
3.13
manufacturer
legal entity, manufacturing and selling systems as defined in 3.1 and 3.2, presenting them as his own work,
i.e. showing on all products his manufacturing mark and/or name
3.14
range of products
group of products produced by one manufacturer for which the test results for one or more characteristics
from any one product within the range are valid for all other products within this range
3.15
system under vacuum
siphonic system for draining rainwater and vacuum system for waste waters
4 Technical requirements
4.1 General
4.1.1 Introduction
The general requirements for pipes, fittings, joints and accessories are defined in 4.1 to 4.8 and in 4.12.
Additional requirements are given in 4.10 for buried systems and in 4.11 for rainwater systems to be installed
outside buildings.
NOTE Information on manufacturing criteria and quality assurance is given in annex D.
4.1.2 Surface condition
Pipes, fittings and accessories shall be free from defects (superficial and other defects) which could be
detrimental to their correct operation or long service life as defined in this standard.
4.1.3 Reaction to fire
Uncoated cast iron pipes and fittings, their joints and accessories are Class A1 CWFT according to CEC
Decision 96/603/EC as amended.
Considering the products in their end-use conditions (assembled into a discharge system), even if:
 internal coatings are not relevant as they are not exposed to fire (a very low quantity of smoke is possible
but it will go outside buildings through stack vents);
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 gaskets of joints are not relevant either as in the end-use conditions they are not or very few (external
edge) exposed to fire and represent a very low quantity of organic material they will be tested according
to EN 13823 (SBI) using the mounting adaptations given in Annex H to verify these assumptions.
According to EN 13501-1, as the gross calorific potential (PCS) of the products in their assembled state
(pipes, fittings, joints, their components and materials), due to their densities and weight quantities, will always
satisfy the requirement on PCS for the product as a whole (≤ 2,0 MJ/kg), the reaction to fire classification shall
be obtained as follows:
 external coatings, if containing more than 1 % by weight or volume (whichever is the more onerous) of
homogeneously distributed organic material, shall satisfy the requirements of 4.6.3 on ignitability or gross
calorific potential, depending on the intended class of reaction to fire
and
 a range (including coated pipes, coated fittings, couplings and possibly grip collars) shall be tested
according to EN 13823 (SBI), using the mounting adaptations given in Annex H, and shall satisfy the
requirements of classification criteria and additional classifications listed in EN 13501-1 for the intended
class of reaction to fire. If a range includes grip collars, as these products are not always installed on the
discharge system depending on the expected performances:
 the test shall be done without them to evaluate the behaviour of the couplings without any protection
to the flame;
 and only if the grip collars include an organic material, the test shall be done again with the grip
collars installed on top of the couplings (see Annex H).
To obtain a classification for their joints (for CE marking), a manufacturer of only joints shall test them once
according to EN 13823 (SBI) using the mounting adaptations given in Annex H, with pipes and fittings of a
cast iron range which already has a reaction to fire classification given by a notified test laboratory, and he
shall prove that the existing classification of the range is not changed for a worse one by the substitution of the
joints.
NOTE See F.2.
4.1.4 Noise protection
For installed networks, there may be national installation regulations concerning noise protection, and
manufacturers could provide information about solutions for requirements (see also Annex F).
NOTE 1 For installed networks, there can be national installation regulations concerning noise protection, and
manufacturers could provide information about solutions for requirements (see also Annex F).
NOTE 2 Noise protection is not mandated under CPD. There are no national regulations concerning noise in direct
relation to the product.
4.1.5 Dangerous substances (regulated substances)
The materials which the products are made from shall not release dangerous substances (regulated
substances) in excess of the maximum permitted levels specified by a relevant European Standard for the
materials or permitted by national regulations in the territory of destination.
4.2 Dimensions
4.2.1 Nominal size (DN)
The nominal sizes shall be as given in column 1 of Table 1.
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4.2.2 External diameter (DE)
The standard external diameters (DE) of pipes and fittings, as well as the tolerances applicable to these, shall
comply with the values given in Table 1, when measured in accordance with 5.2.1. When, by agreement
between manufacturer and purchaser, specific coatings are supplied for special applications, other tolerances
are permitted. Due regard shall be given to 4.8, in this case.
Table 1 – Dimensions of pipes and fittings
Dimensions in millimetres
External diameter DE Wall thickness
DN Nominal value Tolerance Nominal value Minimum value
40 48 +2 3,0 2,5
-1
50 58 +2 3,5 3,0
-1
70 78 +2 3,5 3,0
-1
75 83 +2 3,5 3,0
-1
100 110 +2 3,5 3,0
-1
125 135 +2 4,0 3,5
-2
150 160 +2 4,0 3,5
-2
200 210 +2,5 5,0 4,0
-2,5
250 274 +2,5 5,5 4,5
-2,5
300 326 +2,5 6,0 5,0
-2,5
400 429 +2 6,3 5,0
-3
500 532 +2 7,0 5,2
-3,8
600 635 +2 7,7 5,8
-4
NOTE 1 In countries where the nominal sizes DN 60 and DN 80 are still mentioned in application standards these nominal sizes can
still be used.
NOTE 2 Other dimensions are given in 4.9 for buried systems and in 4.10 for rainwater systems installed outside buildings.
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4.2.3 Wall thickness
Wall thicknesses of pipes and fittings shall comply with the values given in Table 1, when measured in
accordance with 5.2.2.
4.2.4 Internal diameter
In order to ensure the hydraulic function, the internal diameter of pipes when measured in accordance with
5.2.3, shall be not less than:
 0,975 DN for nominal sizes equal to or greater than DN 70;
 0,950 DN for nominal sizes less than DN 70.
4.2.5 Ovality
When measured in accordance with 5.2.4 the ovality of the pipes and of the sealing zones of fittings (see
4.2.9) shall remain within the tolerances on DE shown in Table 1 for DN 40 to DN 300 and shall not exceed
1 % for DN 400 to DN 600 (see 3.36 of EN 598:2007).
4.2.6 Straightness of pipes
When measured in accordance with 5.2.5 the pipes shall be straight with a maximum deviation of:
 0,15% of their length for nominal sizes greater than DN 70;
 0,20% of their length for nominal sizes equal to or less than DN 70.
4.2.7 End faces
The end faces of the products shall be free from faults which may impair their fitness for use and their planes
shall be perpendicular with the axes of symmetry of the products. When measured in accordance with 5.2.6,
the maximum deviation from the right angle shall be:
 3° for nominal sizes DN 40 to DN 200;
 2° for nominal sizes DN 250 to DN 600.
4.2.8 Length of pipes
Pipes shall be normally produced with a length of 3 m.
NOTE Other lengths are permitted and can be supplied with special identification by agreement between the
manufacturer and the purchaser.
When measured in accordance with 5.2.7 the length of all pipes shall be within a tolerance of ± 20 mm.
4.2.9 Lengths of fittings and sealing zones
Lengths of fittings shall be given in the manufacturers’ catalogues. When measured in accordance with 5.2.7
the lengths of fittings shall be within a tolerance of ± 5 mm.
The ends of the fittings shall have sealing zones straight in axis and free from marking and free from defects
which could impair the fitness for use.
The length T (see Figure 1) of this sealing zone shall comply with the values given in Table 2.
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Figure 1
4.2.10 Geometry of fittings and accessories
The geometry of fittings and accessories is not standardized at this stage. Fittings and accessories of
geometry presently used in various countries are in conformity with this standard as long as they comply with
all other technical requirements of this standard.
Table 2 – Sealing zone of fittings
*)
P
DN Length T of sealing zone Lower deviation on TP
mm mm
40 30
50 30
70 35
75 35 - 5
100 40
125 45
150 50
200 60
250 70
300 80
400 80 - 4
500 80
600 80
*) Upper deviations are not given and sealing zones with a length greater than T are permitted.
4.2.11 Angles of fittings
Fittings shall be designed to the angles specified below with a design tolerance of ± 2°:
o
P
 bends: 15°; 22°; 30P ; 45°, 68°; 88;
 single/double branches: 45°; 68°; 88°.
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4.2.12 Access components and traps
The minimum dimension of the openings of access components up to DN 150 inclusive, shall be at least equal
to the whole number of the nominal size in millimetres. For access components over DN 150, the minimum
dimension of the opening shall be at least 150 mm.
The height of water seal of traps shall be at least 50 mm.
4.3 Interconnection
Products of the same DN in accordance with this standard (see Table 1) can be connected with each other.
4.4 Mass
The nominal masses of finished products (pipes, fittings and accessories) shall be given in the manufacturers’
catalogues. When the mass is measured in accordance with 5.3, the lower deviation shall not exceed 15% of
the nominal mass.
4.5 Material characteristics of pipes, fittings and accessories
4.5.1 Cast iron
Pipes, fittings and accessories shall be manufactured from:
 grey cast iron in accordance with ISO 185:2005; or
 spheroidal graphite cast iron in accordance with EN 598:2007; or
 any other type of cast iron in accordance with 4.5.2.
4.5.2 Mechanical properties
Pipes, fittings and accessories shall have the mechanical properties given in Table 3.
Table 3 – Mechanical properties of pipes, fittings and accessories
Type of casting Minimum tensile Minimum ring crush Maximum Brinell
strength hardness
1)2)
and material P P strength
MPa MPa HB
Pipes
3)
 grey cast iron
200 350 P 260
 spheroidal graphite cast 420 -- 230
iron
Fittings and accessories
 grey cast iron
150 -- 260
 spheroidal graphite cast 420 -- 250
iron
1) Other types of cast iron shall satisfy the criteria laid down for grey cast iron.
2) Tensile and ring crush strength for other products see Annex A.
3) 332 MPa for nominal sizes equal to or greater than DN 250.
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oSIST prEN 877:2012
prEN 877:2012 (E)
The modulus of elasticity E shall be given by the manufacturer. It is normally at least 110 GPa for grey cast
iron and at least 170 GPa for spheroidal graphite cast iron.
4.6 Coatings for pipes, fittings and accessories
4.6.1 General
The cast iron components shall be coated internally and externally. Before applying the coatings, the surfaces
shall be dry and free from rust or non-adhering products or foreign matter, e.g. oil, grease.
Points of contact inherent in the coating application systems are permitted.
These coatings shall not become sticky when they are heated to 100°C. They shall maintain an acceptable
appearance up to installation and permit the application of additional external finishing coatings.
The manufacturer shall specify the minimum factory applied thicknesses of the dry internal and external
coatings on the finished products and shall demonstrate that these coatings conform to 4.6.2 or 4.6.3
respectively.
NOTE Specific requirements for coatings for buried systems and rainwater systems installed outside buildings are
given in 4.10.3 and 4.11.2 respectively.
4.6.2 Internal coatings
When tested in accordance with 5.7.2 the materials for internal coatings shall conform to the following
requirements:
at least 350 h in accordance with EN ISO 9227;
 resistance to salt spray:
 resistance to waste water: at least 30 d at 45°C;
at least 30 d at 23°C.
 chemical resistance from pH 2 to pH 12:
When tested in accordance with 5.7.2, the internal coatings on finished products shall conform to the following
requirements:
not greater than 400 µm (except for specific coatings for
 dry coating thickness:
special applications), and at least the minimum factory
applied thickness to be specified by the manufacturer (see
4.6.1);
in accordance with level 1 of EN ISO 2409;
 adhesion:
24 h at 95°C;
 resistance to hot water:
1500 cycles between 15°C and 93°C.
 resistance to temperature cycling:
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oSIST prEN 877:2012
prEN 877:2012 (E)
4.6.3 External coatings
The external coatings on finished products which are only considered as a primary coat shall not be readily
flammable and shall be free from toxic heavy metals.
When tested in accordance with 5.7.3 the materials for external coatings shall conform to the following
requirements:
definition by trichromatic coordinates: L = 37; a = 24;
 colour:
b = 16; ∆ E = 4,0 in accordance with ISO 7724-
1,ISO 7724-2 and ISO 7724-3 (approximately reddish-
brown);
paints normally used on metallic structures;
 compatib
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