SIST EN 295-1:2013

SLOVENSKI STANDARD
SIST EN 295-1:2013
01-julij-2013
1DGRPHãþD
SIST EN 295-1:1996
SIST EN 295-1:1996/A1:1998
SIST EN 295-1:1996/A2:1998
SIST EN 295-1:1996/A3:2000
SIST EN 295-10:2005
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Vitrified clay pipe systems for drains and sewers - Part 1: Requirements for pipes, fittings
and joints
Steinzeugrohrsysteme für Abwasserleitungen und -känale - Teil 1: Anforderungen an
Rohre, Formstücke und Verbindungen
Systèmes de tuyaux et accessoires en grès pour les réseaux de branchement et
d’assainissement - Partie 1: Exigences pour tuyaux, accessoires et assemblages
Ta slovenski standard je istoveten z: EN 295-1:2013
ICS:
23.040.50 Cevi in fitingi iz drugih Pipes and fittings of other
materialov materials
91.140.80 Drenažni sistemi Drainage systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
SIST EN 295-1:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 295-1:2013

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SIST EN 295-1:2013


EUROPEAN STANDARD
EN 295-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2013
ICS 93.030 Supersedes EN 295-1:1991, EN 295-10:2005
English Version
Vitrified clay pipe systems for drains and sewers - Part 1:
Requirements for pipes, fittings and joints
Systèmes de tuyaux et accessoires en grès pour les Steinzeugrohrsysteme für Abwasserleitungen und -känale -
réseaux de branchement et d'assainissement - Partie 1: Teil 1: Anforderungen an Rohre, Formstücke und
Exigences pour tuyaux, accessoires et assemblages Verbindungen
This European Standard was approved by CEN on 1 December 2012.

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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 295-1:2013: E
worldwide for CEN national Members.

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SIST EN 295-1:2013
EN 295-1:2013 (E)
Contents Page
Foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
4.1 Symbols . 7
4.2 Abbreviations . 7
5 Requirements for pipes and fittings . 8
5.1 Materials, manufacture, water absorption and appearance . 8
5.2 Internal diameter . 8
5.3 Length . 9
5.4 Squareness of ends . 9
5.5 Deviation from straightness . 9
5.6 Water seal of trapped fittings . 9
5.7 Angle of curvature and radius of bends . 10
5.8 Branch angle of junctions . 10
5.9 Crushing strength (F ) . 10
N
5.10 Bending tensile strength. 12
5.11 Bending moment resistance (BMR). 12
5.12 Bond strength of adhesive used for fixing fired clay parts together . 12
5.13 Fatigue strength under cyclic load . 13
5.14 Watertightness of pipes and junctions . 13
5.15 Chemical resistance . 13
5.16 Hydraulic roughness . 13
5.17 Abrasion resistance . 13
5.18 Airtightness . 13
5.19 Tightness of fittings . 14
5.20 Resistance against high pressure water jetting . 14
6 Requirements for joints and joint assemblies . 15
6.1 Joint materials . 15
6.2 Watertightness of joint assemblies under deflection and shear load . 16
6.3 Continuity of invert in joint assemblies . 17
6.4 Joint interchangeability of pipes and fittings in joint assemblies . 17
6.5 Chemical and physical resistance to effluent of joint assemblies . 19
6.6 Thermal cycling stability of joint assemblies . 20
6.7 Long-term thermal stability of joint assemblies . 20
7 Common requirements for pipes, fittings and joints . 20
7.1 Reaction to fire . 20
7.2 Durability . 20
7.3 Dangerous substances . 21
8 Designation . 21
9 Marking . 21
9.1 Pipes and fittings . 21
9.2 Joints . 22
10 Evaluation of conformity. 22
10.1 General . 22
10.2 Initial type testing . 22
2

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SIST EN 295-1:2013
EN 295-1:2013 (E)
10.3 Factory production control (FPC) .2 2
Annex A (normative) Requirements for vitrified clay fittings .2 3
Annex B (informative) Guidance on design, installation and operation of sewers and drains
constructed from vitrified clay pipes .2 4
B.1 General .2 4
B.2 Hydraulic design .2 4
B.3 Structural design .2 4
B.4 Installation .2 4
B.5 Operation and maintenance .2 4
B.6 Economy .2 5
B.7 Environmental characteristics .2 5
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive .2 6
ZA.1 Scope and relevant characteristics .2 6
ZA.2 Procedures for the attestation of conformity of vitrified clay pipes, fittings and pipe joints . 28
ZA.3 CE marking .2 9
Bibliography .3 4

3

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SIST EN 295-1:2013
EN 295-1:2013 (E)
Foreword
This document (EN 295-1:2013) has been prepared by Technical Committee CEN/TC 165 “Wastewater
engineering”, the secretariat of which is held by DIN.
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 August 2013, and conflicting national standards shall be withdrawn at
the latest by August 2013.
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.
This document supersedes EN 295-1:1991 and together with EN 295-2:2013, EN 295-4:2013,
EN 295-5:2013, EN 295-6:2013 and EN 295-7:2013 it supersedes EN 295-10:2005.
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(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
The main changes with respect to the previous edition are listed below:
a) new dimensions included in Table 13 and Table 14 and dimensions for products no longer manufactured
deleted;
b) requirements for the resistance to high pressure water jetting added;
c) requirements for water absorption added;
d) reaction to fire added;
e) Annex ZA added;
f) editorially revised.
The standard series EN 295 "Vitrified clay pipe systems for drains and sewers" consists of the following parts:
 Part 1: Requirements for pipes, fittings and joints (the present document)
 Part 2: Evaluation of conformity and sampling
 Part 3: Test methods
 Part 4: Requirements for adaptors, connectors and flexible couplings
 Part 5: Requirements for perforated pipes and fittings
 Part 6: Requirements for components of manholes and inspection chambers
 Part 7: Requirements for pipes and joints for pipe jacking
Guidance on design, installation and operation of sewers and drains constructed from vitrified clay pipes is
given in EN 295-1:2013, Annex B.
4

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SIST EN 295-1:2013
EN 295-1:2013 (E)
According to the CEN/CENELEC Internal Regulations, the national standards organisations 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
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SIST EN 295-1:2013
EN 295-1:2013 (E)
1 Scope
This European Standard specifies requirements for vitrified clay pipes, fittings and flexible joints for buried
drain and sewer systems for the conveyance of wastewater (including domestic wastewater, surface water
and rainwater) under gravity and periodic hydraulic surcharge or under continuous low head of pressure.
This standard also specifies requirements for rubber, polyurethane and polypropylene materials and other
components used for jointing clay pipes and fittings.
This standard specifies different strength classes, systems of joint dimensions, lengths and fittings.
NOTE 1 The specifiers/purchasers can select them according to their requirements.
This standard does not apply to special fittings, adaptors and compatible accessories, perforated pipes and
fittings, manholes and inspection chambers and pipes and joints for pipe jacking, which are specified in other
parts of the standard series EN 295.
NOTE 2 Corresponding provisions for the evaluation of conformity (ITT and FPC) and sampling and those for the test
methods are further specified in EN 295-2 and EN 295-3, respectively.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 295-2:2013, Vitrified clay pipe systems for drains and sewers — Part 2: Evaluation of conformity and
sampling
EN 295-3:2012, Vitrified clay pipe systems for drains and sewers — Part 3: Test methods
EN 681-1, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage
applications — Part 1: Vulcanized rubber
EN 681-4, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage
applications — Part 4: Cast polyurethane sealing elements
EN 1610:1997, Construction and testing of drains and sewers
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
nominal size
DN
numerical designation of size which is a convenient round number equal to or approximately equal to the
internal diameter in millimetres
3.2
curvature
angle subtended by the length of a curved fitting at the centre of a circle of nominal radius through the
centreline of the fitting
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SIST EN 295-1:2013
EN 295-1:2013 (E)
3.3
joint assembly
adjacent ends of pipes, fittings or adaptors and the means of joining them
3.4
joint system
dimensions of a joint related to spigot or socket
Note 1 to entry: Joint systems C, D and I are related to internal diameters of sockets, and joint systems E to H are
related to the spigot outside diameters.
3.5
sealing element
factory made component which seals the joint
3.6
fairing
any component located within a joint to reduce dimensional tolerances of sealing surfaces
3.7
minimum internal diameter
smallest internal diameter measured within 100 mm of the ends of the pipe
3.8
pipe section
short length of pipe barrel equal to or greater than 300 mm
3.9
nominal length
numerical designation of length approximately equal to the internal length of the pipe barrel
4 Symbols and abbreviations
4.1 Symbols
F  crushing strength, in kN/m
N
F  shear load, in kN
S
d spigot outside diameter, in mm
3
d  internal diameter of socket or fairing, in mm
4
p initial air pressure, in kPa

0
∆p pressure drop, in kPa
2
W water addition needed to maintain watertightness test pressure, in l/m
15
4.2 Abbreviations
BMR bending moment resistance
CWT classified without the need for testing
7

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SIST EN 295-1:2013
EN 295-1:2013 (E)
5 Requirements for pipes and fittings
5.1 Materials, manufacture, water absorption and appearance
5.1.1 Materials
Pipes and fittings shall be made from suitable natural clays to enable the pipe body to be fired to vitrification
that is with a glass matrix, so that the final product is in accordance with this standard.
5.1.2 Manufacture
Pipes and fittings shall be sound and shall be free from such defects as would impair their function when in
service.
NOTE Pipes and fittings are regarded as rigid (stiff) and the joints as flexible; all have high corrosion resistance.
Fittings may be completed by fixing fired parts together. Products may be surface treated after firing.
Applicable dimensional and performance requirements for fittings shall be as specified in Annex A.
5.1.3 Water absorption
Pipes and fittings shall have a water absorption value of less than 6 % when tested in accordance with
EN 295-3:2012, Clause 28.
5.1.4 Appearance
Pipes and fittings can be unglazed or glazed on the interior and/or exterior. When glazed they need not be
glazed on the jointing surfaces of the spigot and/or socket.
Visual imperfections, such as missing glaze, unevenness, creasings in the transition from pipe to socket and
slight surface damage are acceptable, providing the impermeability, durability and flow characteristics of the
pipes and fittings are unaffected.
5.2 Internal diameter
The internal diameter shall not be less than the values given in Table 1.
Table 1 — Internal diameter
Nominal size Minimum internal Nominal size Minimum internal
diameter diameter
DN DN
mm mm
100 96 450 439
125 121 500 487
150 146 600 585
200 195 700 682
225 219 800 780
250 244 900 878
300 293 1 000 975
350 341 1 200 1 170
400 390 1 400 1 365

8

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SIST EN 295-1:2013
EN 295-1:2013 (E)
Other nominal sizes can be manufactured to comply with this standard, providing that the minimum internal
diameter shall be not less than 97,5 % of the nominal size, rounded to the nearest whole millimetre.
5.3 Length
The preferred nominal lengths of pipes of DN 200 and greater shall be either in accordance with Table 2 or in
whole multiples of 0,25 m. There are no preferred nominal lengths for DN 100, DN 125 and DN 150 pipes or
straight fittings.
Table 2 — Preferred nominal lengths
Nominal size Preferred nominal lengths
DN m
200 1,5 – 2,0 2,5 –
225 1,5 1,75 2,0 – –
250 1,5 – 2,0 2,5 –
300 1,5 – 2,0 2,5 –
1,5 – 2,0 2,5 3,0
≥ 350
NOTE Lengths of 1,0 m, 1,6 m and 1,85 m are also preferred for the range DN 200 to DN 450.

The length shall be measured to the nearest whole millimetre. The tolerance on the declared nominal length of
pipes and straight fittings shall be from – 1 % to + 4 %, or ± 10 mm, whichever is the larger.
5.4 Squareness of ends
When tested in accordance with EN 295-3:2012, 5.1, the deviation from squareness measured at the ends of
pipes and straight fittings shall be not greater than 6 mm for sizes up to and including DN 300. For sizes
greater than DN 300, the deviation shall not exceed 2 % of DN.
5.5 Deviation from straightness
When tested in accordance with EN 295-3:2012, Clause 6, the deviation from straightness of the barrel of a
pipe, measured to the nearest whole millimetre, shall be not greater than the values given in Table 3.
Table 3 — Deviation from straightness
Nominal size Maximum deviation from straightness
mm/m of nominal length
DN < 150 5
4,5
150 ≤ DN < 200
4
200 ≤ DN ≤ 300
DN > 300 3

5.6 Water seal of trapped fittings
Trapped fittings for drainage outside buildings and sewerage shall provide a minimum water seal depth of
50 mm.
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SIST EN 295-1:2013
EN 295-1:2013 (E)
5.7 Angle of curvature and radius of bends
The preferred nominal angles of curvatures of bends and tolerances shall be as given in Table 4.
Table 4 — Angle of curvature of bends
Preferred nominal angle of curvature of bends 11,25° 15° 22,5° 30° 45° 90°
Tolerance on angle ± 3° ± 4° ± 5°

The centreline radius shall be not less than the nominal size in millimetres. Shorter radius bends are permitted
up to and including DN 150.
5.8 Branch angle of junctions
The preferred nominal angles of junction arms are 45° and 90°. The tolerance for the branch angle shall be
± 5° of the nominal value.
5.9 Crushing strength (F )
N
When tested in accordance with EN 295-3:2012, Clause 7, the crushing strength (F ) of pipes or pipe
N
sections shall be not less than the values given in Tables 5 to 7.
Table 5 — Crushing strength for DN 100, DN 125 and DN 150 pipes
Minimum crushing strength
Nominal size
F
N
DN
kN/m
100 28 34 40
125 – 34 –
150 28 34 40

Higher crushing strengths can be declared for DN 100, DN 125 or DN 150 pipes, provided that the increase is
in steps of 6 kN/m.
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SIST EN 295-1:2013
EN 295-1:2013 (E)
Table 6 — Crushing strength for DN 200 to DN 600 pipes
Nominal Class
size
95 120 160 200 240 260 280

Minimum crushing strength
DN
F
N
kN/m
200 – – 32 40 48 52 56
225 – 28 36 45 – – –
250 – – 40 – 60 65 70
300 – – 48 – 72 – –
350 – – 56 70 – – –
400 – 48 64 80 – – –
450 – 54 72 – – – –
500 – 60 80 – – – –
600 57 – 96 – – – –

Higher crushing strengths than those given in Table 6 can be declared for DN 200 to DN 600 pipes providing
that they comply with the requirements of the next higher class. Classes are restricted to 95, 120,160, 200,
240, 260 and 280 and thereafter in increments of 40.
The crushing strength of nominal sizes other than those given in Table 6 and Table 7 shall be calculated in
accordance with Formula (1).
Class×DN
F = (1)
N
1000
Table 7 — Crushing strength for DN 700 to DN 800 pipes
Nominal size Class
DN 120 160 200
Minimum crushing strength
F
N
kN/m
700 84 112 140
800 96 128 160

Higher crushing strengths than those given in Table 7 for each class can be declared for DN 700 to DN 800
pipes provided that they comply with the requirements of the next higher class. Classes are restricted to 120,
160 and 200 and thereafter in increments of 10. For nominal sizes larger than DN 800, the crushing strength
shall be declared.
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SIST EN 295-1:2013
EN 295-1:2013 (E)
5.10 Bending tensile strength
If it is required to determine the crushing strength where whole pipes or pipe sections are not available, for
example after failure in use, a bending tensile strength test, in accordance with EN 295-3:2012, Clause 8, can
be carried out on broken pipe pieces.
The crushing strength of the pipe shall be calculated from the mean bending tensile strength of at least ten
test pieces.
5.11 Bending moment resistance (BMR)
When tested in accordance with EN 295-3:2012, Clause 9, the bending moment resistance (BMR) for pipes
with nominal sizes up to and including DN 225 and with nominal lengths greater than 1,1 m shall be not less
than that given in Table 8.
Table 8 — Minimum bending moment resistance (BMR) for crushing strength values (F )
N
Nominal
F F F F F F
size BMR BMR BMR BMR BMR BMR
N N N N N N
DN (kN/m) (kNm) (kN/m) (kNm) (kN/m) (kNm) (kN/m) (kNm) (kN/m) (kNm) (kN/m) (kNm)
100 – – 28 1,3 34 1,7 40 2,0 – – – –
125 – – – – 34 3,0 – – – – – –
150 – – 28 3,4 34 4,0 40 4,6 – – – –
200 – – 32 6,2 40 7,4 48 8,6 52 9,2 56 9,9
225 28 6,5 36 7,4 45 9,0 – – – – – –

Pipes with higher declared values of crushing strength than those given in Tables 5 and 6 shall demonstrate
proportionately higher values of bending moment resistance, when tested in accordance with EN 295-3:2012,
Clause 9.
NOTE A pipe designed in cross section using a specified crushing strength, F , and meeting the relevant bending
N
moment resistance requirement, BMR, does not fail in longitudinal bending before the design crushing load is exceeded.
Therefore, only a calculation for cross sectional loading is needed for the purposes of structural design. Pipes larger than
DN 225 or shorter than 1,1 m that meet the specified crushing strength do not fail in longitudinal bending.
5.12 Bond strength of adhesive used for fixing fired clay parts together
5.12.1 Minimum bending tensile strength of the bond
Fabricated test specimens shall not fracture through the adhesive nor at the adhesive/clay interface under a
2
bending tensile stress of 5 N/mm after full curing when made and tested in accordance with EN 295-3:2012,
Clause 10.
5.12.2 Minimum strength after immersion
If it is required, fabricated test specimens shall not fracture through the adhesive nor at the adhesive clay
2
interface under a bending tensile stress of 5 N/mm after full curing when made and tested in accordance with
EN 295-3:2012, Clause 10, after immersion in test solutions as specified in EN 295-3:2012, Clause 23.
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SIST EN 295-1:2013
EN 295-1:2013 (E)
5.13 Fatigue strength under cyclic load
Where the resistance to fatigue under cyclic loads is required, it shall be demonstrated by testing in
accordance with EN 295-3:2012, Clause 11, when test pieces shall not fail.
5.14 Watertightness of pipes and junctions
When pipes, junctions or pipe sections are tested in accordance with EN 295-3:2012, Clause 12, the water
2
addition W needed to maintain the pressure of 50 kPa (0,5 bar) shall not exceed 0,04 l/m of wetted internal
15
pipe surface area and there shall be no visible leakage.
If pipes are required to withstand continuous working under low pressure, the test pressure and water addition
W shall be agreed between manufacturer and purchaser with the maximum test pressure of 600 kPa (6 bar).
15
5.15 Chemical resistance
When tested in accordance with EN 295-3:2012, Clause 13, the loss of material from the test piece shall be
declared.
NOTE Under normal conditions of use, vitrified clay pipes are considered to be resistant to chemical attack and
expected to show typical values of loss of material between 0,1 % and 0,25 %.
5.16 Hydraulic roughness
Where the hydraulic roughness is required, it shall be demonstrated by testing in accordance with
EN 295-3:2012, Clause 14 and the hydraulic roughness declared.
NOTE Vitrified clay pipes and fittings have a low hydraulic roughness (typically between 0,02 mm and 0,05 mm).
5.17 Abrasion resistance
Where the abrasion resistance is required, it shall be demonstrated by testing in accordance with
...