oSIST prEN 545:2008
(Main)Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods
Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods
This European Standard specifies the requirements and associated test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of pipelines: - to convey water (e. g. for drinking water pipelines, fire protection, snow guns, irrigation, hydroelectric, reused water pipelines, etc…) - with or without pressure ; - to be installed below or above ground. This standard is applicable to pipes, fittings and accessories which are : - manufactured with socketed, flanged or spigot ends; - normally delivered externally and internally coated ; - suitable for fluid temperatures between 0 °C and 50 °C, excluding frost. This standard covers pipes, fittings ast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints and accessories, in a size range extending from DN 40 to DN 2 000, inclusive. This standard specifies requirements for materials, dimensions and tolerances, mechanical properties and standard coatings of ductile iron pipes and fittings. It also gives performance requirements for all components including joints. Joint design and gasket shapes are outside the scope of this standard. In addition reference is made to the performance requirements of couplings, flange adaptors and saddles manufactured only for use with ductile iron pipes and fittings NOTE In this standard, all pressures are relative pressures, expressed in bars (100 kPa = 1 bar).
Rohre, Formstücke, Zubehörteile aus duktilem Gusseisen und ihre Verbindungen für Wasserleitungen - Anforderungen und Prüfverfahren
Diese Europäische Norm legt die Anforderungen und die diesbezüglichen Prüfverfahren fest, die auf gusseiserne Rohre, Formstücke und ihre Verbindungen zur Errichtung von Rohrleitungen außerhalb von Gebäuden anwendbar sind:
zum Transport von Wasser (z. B. Wasser für den menschlichen Gebrauch, Brandbekämpfung, Schnee¬kanonen, Bewässerung, Wasserkraftanlagen, Rohrleitungen für wiederaufbereitetes Wasser usw.);
mit oder ohne Innendruck;
oberirdisch oder erdverlegt.
Diese Norm gilt für Rohre, Formstücke und Zubehörteile, die:
mit Muffen, Flanschen oder Einsteckenden versehen sind;
mit Umhüllung und Auskleidung geliefert werden;
für Temperaturen flüssiger Medien zwischen 0 °C, jedoch außerhalb des Frost¬bereiches, und 50 °C geeignet sind;
nicht für die Anwendung in Bereichen, die Bestimmungen zum Brandverhalten unterliegen, vorgesehen sind.
ANMERKUNG 1 Dies schließt besondere Vereinbarungen für die Verwendung dieser Produkte bei höheren Temperaturen nicht aus.
Diese Norm gilt für Rohre und Formstücke, die nach einem beliebigen Gießverfahren oder aus gegossenen Einzelteilen hergestellt werden, ebenso für die entsprechenden Verbindungen und Zubehörteile für den Nennwei¬tenbereich von DN 40 bis einschließlich DN 2000.
Diese Europäische Norm legt Anforderungen an Werkstoffe, Abmessungen und Grenzabmaße, mechanische Eigenschaften und die Standardumhüllungen und Auskleidungen von Rohren und Formstücken aus duktilem Gusseisen fest. Sie enthält ebenfalls Anforderungen an die Funktion aller Rohrleitungsteile, einschließlich der Verbindungen. Ausführung der Verbindungen und Form der Dichtungen liegen außerhalb des Anwendungs¬bereiches dieser Europäischen Norm.
Darüber hinaus wird auf die Leistungsanforderungen an Kupplungen, Flanschadapter und Sattelstücke, die für den Gebrauch mit Rohren und Formstücken aus duktilem Gusseisen hergestellt sind, Bezug genommen.
Tuyaux, raccords et accessoires en fonte ductile et leurs assemblages pour canalisations d'eau - Prescriptions et méthodes d'essai
La présente Norme européenne prescrit les exigences et les méthodes d'essai associées, applicables aux tuyaux, raccords et accessoires en fonte ductile et à leurs assemblages, destinés à la construction de canalisations situées à l'extérieur des bâtiments :
pour transporter de l'eau (par exemple de l'eau destinée à la consommation humaine, à la protection contre l'incendie, aux canons à neige, à l'irrigation, à l'hydroélectricité, aux canalisations d'eaux recyclées, etc.) ;
avec ou sans pression ;
installées dans le sol ou en aérien.
Cette norme est applicable aux tuyaux, raccords et accessoires qui sont :
fabriqués avec des extrémités à emboîture, à bride ou à bout uni ;
fournis revêtus extérieurement et intérieurement ;
utilisables pour des températures de fluide allant de 0 °C à 50 °C, gel exclus ;
non destinés à être utilisés dans des zones soumises aux réglementations relatives à l'incendie.
NOTE 1 Cela n'interdit pas des aménagements spéciaux pour les produits devant être utilisés à haute température.
Cette norme traite des tuyaux et raccords moulés par tout procédé de fonderie ou fabriqués à partir de composants moulés, ainsi que les assemblages et accessoires correspondants, pour la gamme de dimensions allant de DN 40 à DN 2000 inclus.
Cette norme prescrit les exigences pour les matériaux, les dimensions et écarts limites, les propriétés mécaniques et les revêtements standards des tuyaux et raccords en fonte ductile. Elle indique également des prescriptions de performance pour tous les composants y compris les assemblages. La conception des assemblages et la géométrie des bagues de joint ne font pas partie du domaine d'application de cette norme.
En outre, référence est faite aux prescriptions de performance relatives aux manchons, aux adaptateurs de brides et aux colliers de prise à selle fabriqués pour être utilisés avec des tuyaux et des raccords en fonte ductile.
Cevi, fitingi, pribor in spoji iz duktilne železove litine za vodovodno omrežje - Zahteve in preskusne metode
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 545:2008
01-september-2008
Cevi, fitingi, pribor in spoji iz nodularne litine za vodovodno omrežje - Zahteve in
preskusne metode
Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements
and test methods
Rohre, Formstücke, Zubehörteile aus duktilem Gusseisen und ihre Verbindungen für
Wasserleitungen - Anforderungen und Prüfverfahren
Ta slovenski standard je istoveten z: prEN 545
ICS:
23.040.10 Železne in jeklene cevi Iron and steel pipes
23.040.40 Kovinski fitingi Metal fittings
91.140.60 Sistemi za oskrbo z vodo Water supply systems
oSIST prEN 545:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 545:2008
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oSIST prEN 545:2008
EUROPEAN STANDARD
DRAFT
prEN 545
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2008
ICS 23.040.10; 23.040.40 Will supersede EN 545:2006
English Version
Ductile iron pipes, fittings, accessories and their joints for water
pipelines - Requirements and test methods
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 Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
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: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 545:2008: E
worldwide for CEN national Members.
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Contents Page
Foreword.4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Technical requirements .9
4.1 General.9
4.2 Pressure class.11
4.3 Dimensional requirements.11
4.4 Material characteristics.15
4.5 Coatings and linings for pipes .16
4.6 Coatings for fittings and accessories.19
4.7 Marking of pipes, fittings and accessories .19
4.8 Leak tightness.20
5 Performance requirements for joints and pipe saddles .20
5.1 General.20
5.2 Flexible joints.21
5.3 Restrained flexible joints .23
5.4 Flanged joints as cast, screwed, welded and adjustable .23
5.5 Pipe Saddles.24
6 Test methods.25
6.1 Pipe dimensions .25
6.2 Straightness of pipes .26
6.3 Tensile testing.26
6.4 Brinell hardness.28
6.5 Works leak tightness test for pipes and fittings.28
6.6 Zinc mass .28
6.7 Thickness of paint coatings .29
6.8 Thickness of cement mortar lining .29
7 Performance test methods .30
7.1 Compressive strength of the cement mortar lining .30
7.2 Leak tightness of flexible joints .30
7.3 Leak tightness and mechanical resistance of flanged joints.33
7.4 Leak tightness and mechanical resistance of pipe saddles .33
8 Tables of dimensions .34
8.1 Socket and spigot pipes .34
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8.2 Flanged pipes .37
8.3 Fittings for socketed joints.38
8.4 Fittings for flanged joints .54
9 Evaluation of conformity .71
9.1 General .71
9.2 Initial performance testing.71
9.3 Factory production control (FPC).73
Annex A (normative) Allowable pressures .77
Annex B (informative) Longitudinal bending resistance of pipes.79
Annex C (informative) Diametral stiffness of pipes.80
Annex D (informative) Alternative pipe coatings, field of use, characteristics of soils.82
Annex E (informative) Field of use, water characteristics .85
Annex F (informative) Table F1 Correspondence between the former K classes and the current
pressure classes .86
Annex G (informative) Calculation method of buried pipelines, heights of cover .87
Bibliography.90
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Foreword
This document (prEN 545:2008) has been prepared by Technical Committee CEN/TC 203 “Cast iron pipes,
fittings 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 545:2006.
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 EC Directive(s).
For relationship with EC Directive(s), see informative Annexes B, C, D, E, F, and G, which is an integral part
of this document.
In this standard Annex A is normative.
This standard is in conformity with the general requirements already established by CEN/TC 164 in the field of
water supply.
In respect of potential adverse effects on the quality of water intended for human consumption, caused by the
product covered by this standard:
this standard provides no information as to whether the product may be used without restriction in any of
the member states of the EU or EFTA;
it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of this product remain in force.
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1 Scope
This European Standard specifies the requirements and associated test methods applicable to ductile iron
pipes, fittings, accessories and their joints for the construction of pipelines outside buildings:
to convey water (e.g. water intended for human consumption, fire protection, snow guns, irrigation, hydro-
electric, re-used water pipelines etc.);
with or without pressure;
to be installed below or above ground.
This standard is applicable to pipes, fittings and accessories which are
manufactured with socketed, flanged or spigot ends;
supplied externally and internally coated;
suitable for fluid temperatures between 0 °C and 50 °C, excluding frost;
not intended for use in areas subject to fire regulations.
NOTE 1 This does not preclude special arrangements for the products to be used at higher temperatures.
This standard covers pipes and fittings cast by any type of foundry process or manufactured by fabrication of
cast components, as well as corresponding joints and accessories, in a size range extending from DN 40 to
DN 2000, inclusive.
This standard specifies requirements for materials, dimensions and tolerances, mechanical properties and
standard coatings of ductile iron pipes and fittings. It also gives performance requirements for all components
including joints. Joint design and gasket shapes are outside the scope of this standard.
In addition reference is made to the performance requirements of couplings, flange adaptors and saddles
manufactured for use with ductile iron pipes and fittings.
NOTE 2 In this standard, all pressures are relative pressures, expressed in bars (100 kPa = 1 bar).
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 196-1, Methods of testing cement — Part 1: Determination of strength.
EN 197-1, Cement – Part 1: Composition, specifications and conformity criteria for common cements.
EN 681-1, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber.
EN 805:2000, Water supply — Requirements for systems and components outside buildings.
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges.
EN 10002-1, Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature.
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EN ISO 4016, Hexagon head bolts — Product grade C (ISO 4016:1999).
EN ISO 4034, Hexagon nuts — Product grade C (ISO 4034:1999).
EN ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method (ISO 6506-1:2005).
EN ISO 7091, Plain washers — Normal series — Product grade C (ISO 7091:2000).
EN 14901, Ductile iron pipes, fittings and accessories – Epoxy coating (heavy duty) of ductile iron fittings and
accessories – Requirements and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply
3.1
ductile iron
cast iron used for pipes, fittings and accessories in which graphite is present substantially in spheroidal form
3.2
pipe
casting of uniform bore, straight in axis, having socket, spigot or flanged ends, except for flanged-socket
pieces, flanged-spigot pieces and collars which are classified as fittings
3.3
fitting
casting other than a pipe which allows pipeline deviation, change of direction or bore. In addition flanged-
socket pieces, flanged spigot pieces and collars are also classified as fittings
3.4
accessory
any casting/fabrication other than a pipe or fitting which is used in a pipeline, for example:
glands and bolts for mechanical flexible joints (see 3.14);
glands, bolts and locking rings for restrained flexible joints (see 3.15);
pipe saddles for service valve connections;
adjustable flanges and flanges to be welded or screwed;
flange adaptors for use with ductile iron pipes and fittings (see 4.1.3.3);
couplings for use with ductile iron pipes and fittings (see 4.1.3.3).
Valves of all types are not covered by the term accessory.
NOTE Wide tolerance flange adaptors and couplings are covered by EN 14525.
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3.5
component
any product defined in 3.2 to 3.4
3.6
flange
end of a pipe fitting or accessory extending perpendicular to its axis, with bolt holes equally spaced on a circle
NOTE A flange can be fixed (e.g. integrally cast or welded) or adjustable; an adjustable flange comprises a ring, in
one or several parts assembled together, which bears on an end joint hub and can be freely rotated around the pipe axis
before jointing.
3.7
spigot
male end of a pipe or fitting
3.8
spigot end
maximum insertion depth of the spigot plus 50 mm
3.9
socket
female end of a pipe or fitting to make the connection with the spigot of the next component
3.10
gasket
sealing component of a joint
3.11
joint
connection between the ends of two pipes and/or fittings in which a gasket is used to effect a seal
3.12
flexible joint
joint which permits significant angular deflection both during and after installation and which can accept a
slight offset of the centreline
3.13
push-in flexible joint
flexible joint assembled by pushing the spigot through the gasket in the socket of the mating component
3.14
mechanical flexible joint
flexible joint in which sealing is obtained by applying pressure to the gasket by mechanical means, e.g. a
gland
3.15
restrained flexible joint
flexible joint in which a means is provided to prevent separation of the assembled joint
3.16
flanged joint
joint between two flanged ends
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3.17
nominal size (DN)
alphanumerical 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 6708:1995]
3.18
nominal pressure (PN)
alphanumerical designation used for reference purposes related to a combination of mechanical and
dimensional characteristics of a component of a pipework system. It comprises the letters PN followed by a
dimensionless number
[EN 1333:2006]
NOTE All equipment of the same nominal size DN designated by the same PN number have compatible mating
dimensions.
3.19
leak tightness test pressure
pressure applied to a component during manufacture in order to ensure its leak tightness
3.20
allowable operating pressure (PFA)
maximum hydrostatic pressure that a component is capable of withstanding continuously in service
[EN 805:2000]
3.21
pressure class
PFA of a family of components including their joint, as verified by all the performance tests described in this
standard
3.22
allowable maximum operating pressure (PMA)
maximum pressure occurring from time to time, including surge, that a component is capable of withstanding
in service
[EN 805:2000]
3.23
allowable test pressure (PEA)
maximum hydrostatic pressure that a newly installed component is capable of withstanding for a relatively
short duration, in order to insure the integrity and tightness of the pipeline
[EN 805:2000]
NOTE This test pressure is different from the system test pressure (STP), which is related to the design pressure of
the pipeline and is intended to ensure its integrity and leak tightness.
3.24
diametral stiffness of a pipe
characteristic of a pipe which allows it to resist ovalization under loading when installed
3.25
performance test
proof of design test which is done once and is repeated only after change of design
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3.26
laying length of a socket and spigot pipe
laying length L is equal to the overall length of the pipe (OL) minus the maximum spigot insertion depth (X) as
e
given by the manufacturer as shown in Figure 5.
3.27
standardized length
standardized length of socketed pipes and fitting (L or l for branches), as shown on Figure 5 for pipes and on
u u
Figures 6 to 15 for fittings
NOTE For socketed pipes, the standardized length L , is equal to the overall length (OL) minus the depth of the
u
socket (DOS) as given by the manufacturer. For flanged pipes and fittings (see Figures 16 to 22), the standardized length
(L or l for branches) is equal to the overall length.
3.28
deviation
design Iength allowance with respect to the standardized length of a pipe or a fitting
3.29
ovality
A − A
1 2
out of roundness of a pipe section; it is equal to: 100
A + A
1 2
where
A is the maximum axis, in millimetres;
1
A is the minimum axis, in millimetres.
2
3.30
pipe minimum thickness
minimum thickness at any point (see Tables 16 and 17) used in the calculation of the pressure class
3.31
thickness for pipe stiffness calculation
pipe thickness based on the pipe minimum thickness and the DN used in the calculation of the pipe diametral
stiffness
4 Technical requirements
4.1 General
4.1.1 Ductile iron pipes and fittings
Nominal sizes, pressure classes, thicknesses, lengths and coatings are specified in 4.1.1, 4.2, 4.3.1, 4.3.3, 4.5
and 4.6 respectively. When pipes and fittings with different pressure classes, lengths and/or coatings and
other types of fittings than those given in 8.3 and 8.4, are supplied with reference to this standard, they shall
comply with all the other requirements of this standard.
NOTE 1 Annex F, Table F1 gives the correspondence by DN between the former K classes and the current pressure
classes.
NOTE 2 Other types of fittings include angle branches, tees and tapers with other combinations DN x dn, draining tees,
etc.
The standardized nominal sizes DN of pipes and fittings are as follows: 40, 50, 60, 65, 80, 100, 125, 150, 200,
250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1400, 1500, 1600, 1800, 2000.
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The allowable pressures of ductile iron pipes and fittings shall be as given in Annex A.
NOTE 3 Annexes B and C give respectively the longitudinal bending resistance and the diametral stiffness of ductile
iron pipes.
NOTE 4 When installed and operated under the conditions for which they are designed (see annexes D, E and G),
ductile iron pipes, fittings, accessories and their joints maintain all their functional characteristics over their reasonable
economic operating life, due to the constant material properties, to the stability of their cross section and to their design
with high safety factors.
4.1.2 Surface condition and repair
Pipes, fittings and accessories shall be free from defects and surface imperfections which can lead to
non-compliance with Clauses 4 and 5.
When necessary, pipes and fittings may be repaired, for example by welding, in order to remove surface
imperfections and localized defects which do not extend through the entire wall thickness, provided that:
the repairs are carried out according to the manufacturer’s written procedure;
the repaired pipes and fittings comply with all the requirements of Clauses 4 and 5.
4.1.3 Types of joints and interconnection
4.1.3.1 General
Rubber gasket materials shall comply with the requirements of EN 681-1, type WA. When materials other than
rubber are necessary (e.g. for high temperature flanged joints), they shall comply with the appropriate
European Technical Specification or where no European Technical Specification exists, the appropriate
International Standard.
4.1.3.2 Flanged joints
Flanges shall be designed such that they can be attached to flanges whose dimensions and tolerances
comply with EN 1092-2. This ensures interconnection between all flanged components (pipes, fittings, valves
etc.) of the same PN and DN and adequate joint performance.
Bolts and nuts shall comply as a minimum with the requirements of EN ISO 4016 and EN ISO 4034,
grade 4.6. Where washers are required they shall comply with EN ISO 7091.
Although it does not affect interconnection, the manufacturer shall state whether his products are normally
delivered with fixed flanges or adjustable flanges.
Flange gaskets may be one of any type given in EN 1514.
4.1.3.3 Flexible joints
Components with flexible joints shall comply with 4.3.2.1 for their spigot external diameter DE and their limit
deviations. This offers the possibility of interconnection between components equipped with different types of
flexible joints.
The design of the sockets and the gaskets for use with the above spigots shall throughout all possible
tolerance combinations:
ensure leak tightness at minimum compression under shear and/or angular deflection;
ensure both leak tightness and satisfactory anchorage (restrained joint) under shear and/or angular
deflection.
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In addition each type of flexible joint shall be designed to fulfil the performance requirements of Clause 5.
Couplings and flange adaptors manufactured for use with ductile iron pipes and fittings shall meet the
performance requirements of flexible joints as detailed in Clauses 5 and 7
NOTE 1 For interconnection with certain types of joints operating within a different tolerance range on DE, the
manufacturer’s guidance should be followed as to the means of ensuring adequate joint performance at high pressures
(e.g. measurement and selection of external diameter).
NOTE 2 For interconnection with existing pipelines which can have external diameters not in compliance with 4.3.2.1,
the manufacturer’s guidance should be followed as to the appropriate means of interconnection (e.g. adaptors).
NOTE 3 If components of different suppliers are used care should be taken to ensure that the requirements of the
performance tests are met.
4.1.3.4 Pipe saddles
Pipe saddles for service connections manufactured for use with ductile iron pipes shall meet the performance
requirements as detailed in Clauses 5 and 7.
4.1.4 Materials in contact with water intended for human consumption
Components of a pipe system include several materials given in this standard. When used under the
conditions for which they are designed, in permanent or in temporary contact with water intended for human
consumption, ductile iron pipes, fittings and their joints shall not change the quality of that water to such an
extent that it fails to comply with the requirements of national regulations.
For this purpose, reference shall be made to the relevant national regulations and standards, transposing EN
standards when available, dealing with the influence of materials on water quality and to the requirements for
external systems and components as given in EN 805.
4.2 Pressure class
The pressure class of a component is defined by the combination of:
The performance of the joint
The structural performance of the component
See Annex A.
4.3 Dimensional requirements
4.3.1 Pipe and fittings thickness
The minimum iron wall thickness of pipes DN 40 to DN 2000 is given as a function of the nominal size (DN)
and pressure class (PFA) in Tables 16 and 17.
For fittings, the nominal thickness e given in tables and on figures of 8.3 and 8.4 is the nominal thickness
corresponding to the main part of the body. The actual thickness at any particular point may be increased to
meet localized high stresses depending on the shape of the casting (e.g. at internal radius of bends, at the
branch-body junction of tees etc.).
Annex A gives the maximum values of PFA, PMA and PEA.
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4.3.1.1 Limit deviations
The limit deviations on the nominal wall thickness of pipes not centrifugally cast and fittings shall be as given
in Table 1. The measurement of the wall thickness shall be in accordance with 6.1.1.
Table 1 – Limit deviations on thickness of pipes not centrifugally cast and fittings
Type of casting Nominal iron wall Limit deviations on the
a
thickness e nominal wall thickness
mm mm
Pipes not centrifugally cast - 2,3
≤ 7,0
and fittings
> 7,0 - (2,3 + 0,001 DN)
a
The lower limit only is given, so as to ensure sufficient resistance to internal pressure.
4.3.2 Diameter
4.3.2.1 External diameter
8.1 specifies the values of the external diameter DE of the coated spigot ends of pipes and fittings and their
maximum allowable limit deviations, when measured using a circumferential tape in accordance with 6.1.2.
These limit deviations apply to the spigot ends of all pressure classes of pipes and fittings.
NOTE 1 Certain types of flexible joints operate within a different range of tolerance (see 4.1.3.3).
For DN ≤ 300, the external diameter of the pipe barrel measured with a circumferential tape shall be such as
to allow the assembly of the joint over at least two thirds of the pipe length from the spigot end when the pipe
needs to be cut on site.
For DN > 300, the same applies to 5 % of the pipes.
In addition, the ovality (see 3.29) of the spigot end of pipes and fittings shall:
remain within the tolerance on DE (see Tables 16 and 17) for DN 40 to DN 200;
not exceed 1 % for DN 250 to DN 600 or 2 % for DN > 600.
NOTE 2 The manufacturer’s guidance should be followed as to the necessity and means of ovality correction; certain
types of flexible joints can accept the maximum ovality without a need f
...
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