Static thermoplastic tanks for above ground storage of fuel - Product characteristics and test methods

This document specifies the product characteristics and the corresponding test methods for static thermoplastic tanks made of:
-   blow moulded polyethylene, or
-   rotationally moulded polyethylene, or
-   rotationally moulded anionically polymerized polyamide 6,
with or without factory assembled reinforcement.
The products covered by this European Standard:
-   are intended to be used for internal or external installations, for above ground storage of fuels limited to kerosene, heating oil, diesel, fatty acid methyl ester (FAME) and bioliquids (containing up to 15 % FAME);
-   have a maximum filling capacity from 400 l up to and including 10 000 l, except for those made of anionically polymerized polyamide 6 where the maximum filling capacity will be limited to 3 000 l;
-   are subject to atmospheric pressure but not to any external loading (e.g. installation, wind and snow, earthquakes, flooding);
-   are not manufactured using recycled thermoplastic material;
-   are not manufactured using regrind thermoplastic material for rotationally moulded tanks;
-   are not manufactured using more than 50 % of regrind thermoplastic material for blow moulded tanks.
This document does not include tanks for the transport and distribution of fuels or gasses, or tanks for the storage of gas.
Flammable fuels with a flash point > 55 °C as determined by EN ISO 2719:2016 are eligible for storage in the tanks described in this standard without further provisions.
Flammable fuels with a flash point ≤ 55 °C as determined by EN ISO 2719:2016 are also eligible for storage in the tanks described in this standard if the provisions concerning electrostatic behaviour according to CLC/TR 60079-32-1:2015 are fulfilled.

Ortsfeste Tanks aus Thermoplasten zur oberirdischen Lagerung von Kraft- und Brennstoffen - Produkteigenschaften und Prüfverfahren

Dieses Dokument legt die Produktmerkmale und die zugehörigen Prüfverfahren für ortsfeste Tanks aus Thermoplasten mit oder ohne werkseitig angebrachten Verstärkungen fest, die aus
-   blasgeformtem Polyethylen, oder
-   rotationsgeformtem Polyethylen, oder
-   rotationsgeformtem, anionisch polymerisiertem Polyamid 6
hergestellt sind.
Die von dieser Europäischen Norm abgedeckten Produkte:
-   sind für die Aufstellung im Innen- oder Außenbereich vorgesehen, zur oberirdischen Lagerung ausschließlich der folgenden flüssigen Brenn- und Kraftstoffe: Kerosin, Heizöl, Dieselkraftstoff, Fettsäuremethylester (FAME, en: fatty acid methyl ester) und flüssige Biobrennstoffe (mit einem FAME-Gehalt von bis zu 15 %);
-   haben ein maximales Füllvolumen von 400 l bis 10 000 l, mit Ausnahme der Produkte aus anionisch polymerisiertem Polyamid 6, für die das maximale Füllvolumen auf 3 000 l begrenzt ist;
-   sind dem atmosphärischen Druck ausgesetzt, jedoch keinen äußeren Lasten (z. B.  infolge des Einbaus, oder durch Einwirkungen von Wind, Schnee, Erdbeben oder Überschwemmung);
-   werden nicht unter Verwendung von thermoplastischen Rezyklaten hergestellt;
-   werden (im Fall von rotationsgeformten Tanks) nicht unter Verwendung von thermoplastischen Regranulaten hergestellt;
-   werden (im Fall von blasgeformten Tanks) unter Verwendung von höchstens 50 % thermoplastischem Regranulat hergestellt.
Dieses Dokument gilt weder für Tanks für den Transport und die Auslieferung von flüssigen Brenn- und Kraftstoffen oder Gasen, noch für Tanks für die Lagerung von Gasen.
Die Lagerung von brennbaren flüssigen Brenn- und Kraftstoffen mit einem nach EN ISO 2719:2016 bestimmten Flammpunkt von > 55 °C in den in dieser Norm beschriebenen Tanks ist ohne ergänzende Bedingungen zulässig.
Die Lagerung von brennbaren flüssigen Brenn- und Kraftstoffen mit einem nach EN ISO 2719:2016 bestimmten Flammpunkt von ≤ 55 °C in den in dieser Norm beschriebenen Tanks ist zulässig, sofern die Bedingungen für die elektrostatischen Eigenschaften nach CLC/TR 60079-32-1:2015 erfüllt sind.

Réservoirs statiques thermoplastiques pour le stockage non enterré de combustibles - Caractéristiques du produit et méthodes d’essai

Le présent document spécifie les caractéristiques du produit et les méthodes d’essai correspondantes pour les réservoirs statiques thermoplastiques en :
-   polyéthylène moulé par soufflage ;
-   polyéthylène moulé par rotation ; ou
-   polyamide 6 polymérisé de manière anionique moulé par rotation ;
avec ou sans produits de renfort assemblés en usine.
Les produits couverts par la présente Norme européenne :
-   sont destinés à être utilisés pour des installations intérieures ou extérieures, pour le stockage non enterré de combustibles limités au pétrole lampant, au fioul domestique de chauffage, au gazole, aux esters méthyliques d’acides gras (EMAG) et aux bioliquides (contenant jusqu’à 15 % d’EMAG) ;
-   ont une capacité maximale de remplissage de 400 l à 10 000 l inclus, à l’exception de ceux en polyamide 6 polymérisé de manière anionique, dont la capacité maximale de remplissage sera limitée à 3 000 l ;
-   sont soumis à la pression atmosphérique, mais ne sont soumis à aucune charge extérieure (par exemple due à l’installation, au vent et à la neige, aux séismes, aux inondations) ;
-   ne sont pas fabriqués à partir de matière thermoplastique recyclée ;
-   ne sont pas fabriqués à partir de matière thermoplastique rebroyée pour les réservoirs moulés par rotation ;
-   ne sont pas fabriqués à partir de plus de 50 % de matière thermoplastique rebroyée pour les réservoirs moulés par soufflage.
Le présent document ne couvre pas les réservoirs pour le transport et la distribution de combustibles ou de gaz, ou les réservoirs pour le stockage de gaz.
Les combustibles inflammables avec un point d’éclair > 55 °C, tel que déterminé selon l’EN ISO 2719:2016, sont éligibles pour le stockage dans les réservoirs décrits dans la présente norme sans dispositions supplémentaires.
Les combustibles inflammables avec un point d’éclair  55 °C, tel que déterminé selon l’EN ISO 2719:2016, sont également éligibles pour le stockage dans les réservoirs décrits dans la présente norme si les dispositions concernant le comportement électrostatique conformément au CLC/TR 60079-32-1:2015 sont satisfaites.

Plastomerne stabilne posode za nadzemno skladiščenje goriva - Značilnosti izdelka in preskusne metode

General Information

Status
Not Published
Public Enquiry End Date
31-Dec-2018
Technical Committee
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
18-Oct-2018
Due Date
07-Mar-2019
Completion Date
04-Jan-2019

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Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13341:2018
01-december-2018
3ODVWRPHUQHVWDELOQHSRVRGH]DQDG]HPQRVNODGLãþHQMHJRULYD=QDþLOQRVWL
L]GHONDLQSUHVNXVQHPHWRGH
Static thermoplastic tanks for above ground storage of fuel - Product characteristics and
test methods
Ortsfeste Tanks aus Thermoplasten zur oberirdischen Lagerung von Kraft- und
Brennstoffen - Produkteigenschaften und Prüfverfahren
Réservoirs statiques thermoplastiques pour le stockage non enterré de combustibles -
Caractéristiques du produit et méthodes d’essai
Ta slovenski standard je istoveten z: prEN 13341
ICS:
23.020.10 1HSUHPLþQHSRVRGHLQ Stationary containers and
UH]HUYRDUML tanks
oSIST prEN 13341:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13341:2018

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oSIST prEN 13341:2018


DRAFT
EUROPEAN STANDARD
prEN 13341
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2018
ICS 23.020.10 Will supersede EN 13341:2005+A1:2011
English Version

Static thermoplastic tanks for above ground storage of fuel
- Product characteristics and test methods
Réservoirs statiques thermoplastiques pour le Ortsfeste Tanks aus Thermoplasten zur oberirdischen
stockage non enterré de combustibles - Lagerung von Kraft- und Brennstoffen -
Caractéristiques du produit et méthodes d'essai Produkteigenschaften und Prüfverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 266.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13341:2018 E
worldwide for CEN national Members.

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oSIST prEN 13341:2018
prEN 13341:2018 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Product characteristics . 7
4.1 Static blow moulded polyethylene tank . 7
4.1.1 Reaction to fire. 7
4.1.2 Mechanical resistance and stability . 7
4.1.3 Internal pressure . 8
4.1.4 Impact resistance . 8
4.1.5 Permeability (resistance to fuels) . 8
4.1.6 Tightness: gas and liquid . 8
4.1.7 Durability (elongation at break after weathering) . 9
4.2 Static rotationally moulded polyethylene tanks . 11
4.2.1 Reaction to fire. 11
4.2.2 Mechanical resistance and stability . 11
4.2.3 Internal pressure . 12
4.2.4 Impact resistance . 12
4.2.5 Permeability (resistance to fuels) . 12
4.2.6 Tightness: gas and liquid . 12
4.2.7 Durability (elongation at break after weathering) . 12
4.3 Static rotationally moulded anionically polymerized polyamide 6 tanks . 15
4.3.1 Reaction to fire. 15
4.3.2 Mechanical resistance and stability . 15
4.3.3 Internal pressure . 15
4.3.4 Impact resistance . 16
4.3.5 Permeability (resistance to fuels) . 16
4.3.6 Tightness: gas and liquid . 16
4.3.7 Durability (elongation at break after weathering) . 16
5 Testing, assessment and sampling methods . 18
5.1 Static blow moulded polyethylene tank . 18
5.1.1 Reaction to fire. 18
5.1.2 Mechanical resistance and stability . 18
5.1.3 Internal pressure . 19
5.1.4 Impact resistance . 20
5.1.5 Permeability (resistance to fuels) . 21
5.1.6 Tightness: gas and liquid . 21
5.1.7 Durability (elongation at break after weathering) . 22
5.2 Static rotationally moulded polyethylene tank . 22
5.2.1 Reaction to fire. 22
5.2.2 Mechanical resistance and stability . 22
5.2.3 Internal pressure . 23
5.2.4 Impact resistance . 24
5.2.5 Permeability (resistance to fuels) . 24
5.2.6 Tightness: gas and liquid . 25
2

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5.2.7 Durability (elongation at break after weathering) . 26
5.3 Static rotationally moulded anionically polymerized polyamide 6 tank . 26
5.3.1 Reaction to fire . 26
5.3.2 Mechanical resistance and stability . 26
5.3.3 Internal pressure . 27
5.3.4 Impact resistance . 27
5.3.5 Permeability (resistance to fuels) . 28
5.3.6 Tightness: gas and liquid . 28
5.3.7 Durability (elongation at break after weathering) . 29
6 Assessment and Verification of Constancy of Performance (AVCP) . 29
6.1 General . 29
6.2 Type testing . 29
6.2.1 General . 29
6.2.2 Test samples, testing and compliance criteria . 30
6.2.3 Test reports . 34
6.2.4 Shared other party results . 34
6.2.5 Cascading determination of the product type results . 34
6.3 Factory production control (FPC) . 36
6.3.1 General . 36
6.3.2 Requirements . 36
6.3.3 Product specific requirements . 39
6.3.4 Initial inspection of factory and of FPC . 40
6.3.5 Continuous surveillance of FPC . 41
6.3.6 Procedure for modifications . 41
6.3.7 One-off products, pre-production products (e.g. prototypes) and products produced
in very low quantity . 41
7 Marking, labelling, packaging and transportation . 42
7.1 Marking . 42
7.2 Transport and handling . 42
Annex A (normative) Product modifications . 43
A.1 General . 43
A.2 Change of raw material . 43
A.3 Change in production method . 43
A.4 Change in tank geometry . 43
Annex B (informative) Environmental aspects . 45
Annex C (informative) Design . 48
C.1 Filling systems . 48
C.2 Venting systems . 48
C.3 Suction/outlet system . 48
C.4 Overfill prevention system . 48
C.5 Contents gauge connection facility . 48
Annex ZA (informative) Relationship of this European Standard with
Regulation (EU) 305/2011 . 49
ZA.1 Scope and relevant characteristics . 49
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 56
ZA.3 Assignment of AVCP tasks . 56
Bibliography . 59

3

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European foreword
This document (prEN 13341:2018) has been prepared by Technical Committee CEN/TC 266
“Thermoplastic static tanks”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13341:2005+A1:2011.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports basic requirements of Regulation (EU) 305/2011.
For relationship with Regulation (EU) 305/2011, see informative Annex ZA, which is an integral part of
this document.
In comparison with the previous edition, the following technical modifications have been made:
a) the title has been changed to “Static thermoplastic tank for the above ground storage of fuel”;
b) the Scope has been amended to include bioliquids;
c) the essential characteristics and their respective proxies have been amended;
d) the structure of the document has been amended.
4

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1 Scope
This document specifies the product characteristics and the corresponding test methods for static
thermoplastic tanks made of:
— blow moulded polyethylene, or
— rotationally moulded polyethylene, or
— rotationally moulded anionically polymerized polyamide 6,
with or without factory assembled reinforcement.
The products covered by this European Standard:
— are intended to be used for internal or external installations, for above ground storage of fuels
limited to kerosene, heating oil, diesel, fatty acid methyl ester (FAME) and bioliquids (containing up
to 15 % FAME);
— have a maximum filling capacity from 400 l up to and including 10 000 l, except for those made of
anionically polymerized polyamide 6 where the maximum filling capacity will be limited to 3 000 l;
— are subject to atmospheric pressure but not to any external loading (e.g. installation, wind and
snow, earthquakes, flooding);
— are not manufactured using recycled thermoplastic material;
— are not manufactured using regrind thermoplastic material for rotationally moulded tanks;
— are not manufactured using more than 50 % of regrind thermoplastic material for blow moulded
tanks.
This document does not include tanks for the transport and distribution of fuels or gasses, or tanks for
the storage of gas.
Flammable fuels with a flash point > 55 °C as determined by EN ISO 2719:2016 are eligible for storage
in the tanks described in this standard without further provisions.
Flammable fuels with a flash point ≤ 55 °C as determined by EN ISO 2719:2016 are also eligible for
storage in the tanks described in this standard if the provisions concerning electrostatic behaviour
according to CLC/TR 60079-32-1:2015 are fulfilled.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 13501-1:2007+A1:2009, Fire classification of construction products and building elements – Part 1:
Classification using data from reaction to fire tests
CLC/TR 60079-32-1:2015, Explosive atmospheres – Part 32-1: Electrostatic Hazards - Guidance
EN ISO 175:2010, Plastics - Methods of test for the determination of the effects of immersion in liquid
chemicals (ISO 175:2010)
5

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prEN 13341:2018 (E)
EN ISO 293:2005, Plastics - Compression moulding of test specimens of thermoplastic materials
(ISO 293:2004)
EN ISO 527-2:2012, Plastics - Determination of tensile properties – Part 2: Test conditions for moulding
and extrusion plastics (ISO 527-2:2012)
EN ISO 1133-1:2011, Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate
(MVR) of thermoplastics – Part 1: Standard method (ISO 1133-1:2011)
EN ISO 1183-1:2012, Plastics - Methods for determining the density of non-cellular plastics – Part 1:
Immersion method, liquid pyknometer method and titration method (ISO 1183-1:2012)
EN ISO 1183-2:2004, Plastics - Methods for determining the density of non-cellular plastics – Part 2:
Density gradient column method (ISO 1183-2:2004)
EN ISO 1872-2:2007, Plastics - Polyethylene (PE) moulding and extrusion materials – Part 2: Preparation
of test specimens and determination of properties (ISO 1872-2:2007)
EN ISO 4892-1:2016, Plastics - Methods of exposure to laboratory light sources – Part 1: General guidance
(ISO 4892-1:2016)
EN ISO 4892-2:2013, Plastics - Methods of exposure to laboratory light sources – Part 2: Xenon-arc lamps
(ISO 4892-2:2013)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
brimful capacity
volume of water held by a tank filled through the filling orifice to the point of overflowing
3.2
family
group of products made of the same raw materials and similar shape but different capacities
3.3
fuel
liquid intended to be stored in a tank
3.4
hydrostatic pressure
pressure exerted on a surface by a vertical column of liquid
Note 1 to entry: The pressure exerted on a surface by a vertical column of water with a height of 100 cm is 10 kPa.
3.5
maximum filling capacity
value of 95 % of the brimful capacity of a tank
6

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3.6
raw material
thermoplastic material before processing
3.7
recycled material
raw or processed thermoplastic material that can be recovered from a waste stream for re-use
3.8
regrind material
in house material arising from the same process and prepared from clean unused tanks and/or
trimmings
3.9
reinforcement
constitutive element of a tank which contributes to its mechanical stability
Note 1 to entry: For example, one or several strapping (s), a secondary containment.
3.10
tank
container for the storage of liquids at atmospheric pressure
4 Product characteristics
4.1 Static blow moulded polyethylene tank
4.1.1 Reaction to fire
The reaction to fire indicates the degree of contribution of the material to the behaviour of the
construction product in the event of fire. When tested in accordance to the test methods given in
Clause 5.1.1, relevant for the claimed class, the test results are expressed as a class according to
EN 13501-1:2007+A1:2009.
4.1.2 Mechanical resistance and stability
4.1.2.1 Density
The density of the raw material is measured in accordance with 5.1.2.1 and the results are expressed
according to Table 1.
4.1.2.2 Melt flow rate
The melt flow rate of both the raw material (before processing) and the material from the tank (after
processing) is measured in accordance with 5.1.2.2 and the results are expressed according to Table 1.
4.1.2.3 Tensile strength at yield
The tensile strength at yield of the material from the tank is measured in accordance with 5.1.2.3 and
the results are expressed according to Table 1.
4.1.2.4 Mass
The mass of the tank is measured in accordance with 5.1.2.4 and the results are expressed according to
Table 1.
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4.1.2.5 Wall thickness
The wall thickness of the tank is measured in accordance with 5.1.2.5 and the results are expressed
according to Table 1.
4.1.2.6 Brimful capacity
The brimful capacity of the tank is measured in accordance with 5.1.2.6 and the results are expressed
according to Table 1.
4.1.2.7 Elongation at yield
The elongation at yield of the material from the tank is measured in accordance with 5.1.2.7 and the
results are expressed according to Table1.
4.1.3 Internal pressure
4.1.3.1 Elongation
The elongation of the tank is measured in accordance with 5.1.3.1 and the results are expressed
according to Table 1.
4.1.3.2 Deformation
The deformation of the tank is measured in accordance with 5.1.3.2 and the results are expressed
according to Table 1.
4.1.4 Impact resistance
The impact resistance of the tank is measured in accordance with 5.1.4 and the results are expressed
according to Table 1.
4.1.5 Permeability (resistance to fuels)
4.1.5.1 Change in mass
The change in mass of the material from the tank is measured in accordance with 5.1.5.1 and the results
are expressed according to Table 1.
4.1.5.2 Change in tensile strength at yield
The change in tensile strength at yield of the material from the tank is measured in accordance with
5.1.5.2 the results are expressed according to Table 1.
4.1.5.3 Change in elongation at yield
The change in elongation at yield of the material from the tank is measured in accordance with 5.1.5.3
and the results are expressed according to Table 1.
4.1.6 Tightness: gas and liquid
4.1.6.1 Visual appearance
The tank is visually inspected in accordance with 5.1.6.1 and the results are expressed according to
Table 1.
4.1.6.2 Water leak tightness
The water leak tightness of the tank is measured in accordance with 5.1.6.2 and the results are
expressed according to Table 1.
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4.1.6.3 Air leak tightness
The air leak tightness of the tank is measured in accordance with 5.1.6.3 and the results are expressed
according to Table 1.
4.1.7 Durability (elongation at break after weathering)
The change of elongation at break after weathering of the material from the tank is carried out in
accordance with 5.1.7 and the results are expressed according to Table 1.
Table 1 — Product characteristics and expression of results for static thermoplastic tank made
of blow moulded polyethylene
Product
Subclause Expression of results
characteristic
Reaction to fire
Reaction to fire 4.1.1 Shall be classified according to EN 13501-1:2007+A1:2009.
Mechanical resistance and stability
3
Density 4.1.2.1 Shall not be less than 938 kg/m .
Shall not exceed 12 g/10 min at 190 °C and 21,6 kg for the raw material.
Melt flow rate 4.1.2.2
Melt flow rate of the material from the tank shall not exceed 15 % of the raw
material melt flow rate.
Tensile
strength at 4.1.2.3 Shall not be less than 21 MPa at yield.
yield
Mass 4.1.2.4 The declared mass shall be the mass of the lightest tank of the samples measured.
For tanks intended for storage of kerosene, the minimum wall thickness shall be
4,5 mm, or if the wall thickness is less than 4,5 mm, the tank manufacturer shall
demonstrate by a test method that the oil permeation is equal or less than the
permeation through a rotationally moulded tank sample with a thickness of
3
4,5 mm and made of a polyethylene with a density of 934 kg/m .
For tanks tested in accordance with 5.1.3.1, the minimum wall thickness shall not
be less than 2,5 mm and, for factory production control the minimum wall
thickness shall be the wall thickness as determined by the type test.
For tanks tested in accordance with 5.1.3.2, the minimum wall thickness shall be
2
as follows, except for each area which surface does not exceed 300 mm , where a
margin of 10 % shall be allowed regarding the minimum wall thickness. These
areas shall be located a minimum of 50 mm from the bottom of the tank. The
manufacturer shall declare in a document, that the margin has no effects on the
Wall thickness 4.1.2.5
physical properties of the tank.
The minimum wall thickness of the tank shall be as follows:

 Maximum filling capacity Minimum wall thickness
 l mm
 ≥ 400 and ≤ 1 000 3,0
 > 1 000 and ≤ 1 500 3,2
 > 1 500 and ≤ 2 000 3,5
 > 2 000 and ≤ 2 500 3,7
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 > 2 500 and ≤ 3 000 3,9
 > 3 000 and ≤ 3 500 4,0

...

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