FprEN 15724

SLOVENSKI STANDARD
oSIST prEN 15724:2007
01-december-2007
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Thermoplastics static tanks for above ground storage of domestic heating oils, kerosene
and diesel fuels - Secondary containments used with tanks complying with EN 13341 -
Requirements and test methods
Ortsfeste Tanks aus Thermoplasten für die oberirdische Lagerung von Heizölen, Kerosin
und Dieselkraftstoffen - Sekundärbehälter zur Verwendung mit Tanks nach EN 13341 -
Anforderungen und Prüfverfahren
Ta slovenski standard je istoveten z: prEN 15724
ICS:
23.020.10 1HSUHPLþQHSRVRGHLQ Stationary containers and
UH]HUYRDUML tanks
oSIST prEN 15724:2007 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
DRAFT
prEN 15724
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2007
ICS 23.020.10

English Version
Thermoplastics static tanks for above ground storage of
domestic heating oils, kerosene and diesel fuels - Secondary
containments used with tanks complying with EN 13341 -
Requirements and test methods
Ortsfeste Tanks aus Thermoplasten für die oberirdische
Lagerung von Heizölen, Kerosin und Dieselkraftstoffen -
Sekundärbehälter zur Verwendung mit Tanks nach EN
13341 - Anforderungen 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 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15724:2007: E
worldwide for CEN national Members.

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prEN 15724:2007 (E)
Contents Page
Foreword.4
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Materials requirements .6
4.1 Thermoplastics .6
4.2 Steel .6
4.3 Release of dangerous substances.7
4.4 Reaction to fire.7
4.4.2 Thermoplastics secondary containments.7
4.4.3 Steel secondary containments.7
4.5 Electrostatic behaviour .8
5 Design .8
5.1 Support .8
5.2 Venting.8
5.3 Suction/outlet system .8
5.4 Drainage.8
5.5 Inspection facilities.8
5.6 Minimum capacity.9
5.7 Identification of leakage.9
5.8 Lid or cover of the secondary containment.9
6 Secondary containment requirements .10
6.1 Thermoplastics secondary containments.10
6.2 Steel secondary containments.11
7 Evaluation of conformity.11
7.1 General.11
7.2 Initial type testing .12
7.2.1 Testing .12
7.2.2 Sampling.12
7.3 Factory production control (FPC) .13
7.3.1 General.13
7.3.2 Equipment .15
7.3.3 Raw materials and components.15
7.3.4 Non-conforming products .15
7.3.5 Process control.15
7.3.6 Continuous surveillance .16
8 Marking, transport and handling of secondary containment.16
8.1 Marking .16
8.1.1 Assemblies of tanks with secondary containment .16
8.1.2 Secondary containments .17
8.2 Transport and handling.17
Annex A (normative) Test methods for determination of secondary containment characteristics.18
A.1 Visual appearance .18
A.2 Wall thickness of secondary containment made of steel.18
A.3 Minimum capacity.18
A.4 Resistance of sealing material to oil.18
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prEN 15724:2007 (E)
A.5 Resistance to salt spray .19
A.5.1 Test specimens.19
A.5.2 Procedure.19
A.5.3 Expression of results.19
A.6 Deformation .19
A.7 Impact resistance .20
A.8 Performance against heat effects.21
A.8.1 Secondary containments intended for tanks for internal installations .21
A.9 Air leaktightness.23
A.9.1 Plastics secondary containments .23
A.9.2 Steel secondary containments .23
A.10 Water leaktightness.23
A.11 Thickness of coatings.23
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive .24
ZA.1 Scope and relevant characteristics .24
ZA.2 Procedure for attestation of conformity of secondary containments .27
ZA.2.1 System of attestation of conformity .27
ZA.2.2 Declaration of conformity.28
ZA.3 CE marking and labelling.29
ZA.3.1 CE marking requirements.29
ZA.3.2 Simplified CE marking with reference to a web site .30

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prEN 15724:2007 (E)
Foreword
This document (prEN 15724:2007) 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 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 Annex ZA which is an integral part of this document.
Introduction
The attention of the user should be drawn to national safety and environmental regulations or other
regulations that apply when installing thermoplastics tanks, and the suitability of fuels to be stored therein.
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prEN 15724:2007 (E)
1 Scope
This European Standard specifies the requirements for materials (thermoplastics or steel), physical properties
and performance of secondary containments used with specific thermoplastics static tanks complying with
EN 13341.
This document is designed to be read with EN 13341.
This European Standard does not consider the consequences of wind or snow loading which is considered to
be an installation issue.
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 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature
EN 10143, Continuously hot-dip steel coated steel sheet and strip — Tolerances on dimensions and shape
EN 10327, Continuously hot-dip coated strip and sheet of low carbon steel for cold forming — Technical
delivery conditions
EN 13160-4, Leak detection systems — Part 4: Liquid and/or vapour sensor systems for use in leakage
containments or interstitial spaces
EN 13238, Reaction to fire tests for building products – Conditioning procedures and general rules for
selection of substrates
EN 13341:2005, Thermoplastics static tanks for above ground storage of domestic heating oils, kerosene and
diesel fuels — Blow moulded polyethylene, rotationally moulded polyethylene and polyamide 6 by anionic
polymerization tanks — Requirements and test methods
EN 13501-1, Fire classification of construction products and building elements — Part 1. Classification using
test data from reaction to fire tests
EN 13823, Reaction to fire tests for building products – Building products excluding floorings – Thermal attack
by a single burning item
EN ISO 2178, Non-magnetic coatings on magnetic substrates — Measurement of coating thickness —
Magnetic method (ISO 2178:1982)
EN ISO 1716, Reaction to fire tests for building products – Determination of the gross calorific value
EN ISO 2360, Non-conductive coatings on non-magnetic electrically conductive basis materials —
Measurement of coating thickness — Amplitude-sensitive eddy current method (ISO 2360:2003)
EN ISO 4892-2, Plastics — Method of exposure to laboratory light sources — Part 2: Xenon-arc sources
(ISO 4892-2:2006)
EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000)
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2006)
ISO 1817:1999, Rubber, vulcanized — Determination of the effect of liquids
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prEN 15724:2007 (E)
ISO 3611, Micrometer callipers for external measurement
CLC/TR 50404, Electrostatics — Code of practice for the avoidance of hazards due to static electricity
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 13341 and the following
apply.
3.1
secondary containment
container which is designed to prevent leakage from a tank entering the environment and which can enable
the detection of leakage
3.2
recycled compound
homogenous mixture of reprocessed polymers from tanks according to EN 13341 and secondary
containments as specified in this document and additives, i.e. anti-oxidants, pigments, UV stabilisers and
others, at a dosage level necessary for the processing and life of product
3.3
regrind material
own material prepared from clean rejected unused tanks, including trimmings from the production of tanks that
will be processed in a manufacturer's plant after having been previously processed by the same manufacturer
3.4
lid
upper part of a secondary containment intended to prevent the ingress of water and deleterious material
3.5
cover
upper part of a secondary containment which contributes to the mechanical resistance of the whole and where
necessary the protection of all fittings connected to the primary tank and also to prevent the ingress of water
and deleterious material
4 Materials requirements
4.1 Thermoplastics
For secondary containments made of thermoplastics, raw materials and specimens shall be tested and fulfil
the requirements given in Table 1 of EN 13341:2005.
A recycled compound which fulfils the requirements according to Table 1 of EN 13341:2005 may be used for
manufacturing secondary containments.
The use of regrind material shall be permitted for manufacturing blow moulded secondary containments.
4.2 Steel
4.2.1 For secondary containments made of hot-dip zinc/zinc-aluminium coated steel sheets, the materials
shall be tested and fulfil the requirements according to Table 1.
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prEN 15724:2007 (E)
Table 1 — Material requirements for hot-dip zinc/ zinc-aluminium coated steel sheets
Property Requirement Test method
Tensile strength Shall not be less than 270 MPa EN 10002-1
2
Coating mass Shall not be less than 255 g/m EN 10327

4.2.2 For secondary containments made of steel sheets with coatings other than those of 4.2.1, the
materials shall be tested and fulfil the requirements according to Table 2.
Table 2 — Material requirements for steel sheets with other coatings
Property Requirement Test method
Tensile strength Shall not be less than 270 MPa EN 10002-1
Resistance to salt spray After 350 h, the corrosion area shall not Clause A.5
exceed 5 % of total external surface area.

4.3 Release of dangerous substances
Materials used in products shall not contain or release any dangerous substances in excess of the maximum
permitted levels specified in a relevant European Standard for the material or permitted in the national
regulations of the country of destination.
4.4 Reaction to fire
4.4.1 Requirements
This characteristic shall be declared when subject to regulatory requirements, and may be declared otherwise.
The reaction to fire of products shall be determined and declared according to the provisions of 4.4.2 or 4.4.3.
For tanks with secondary containment, the reaction to fire classification of the tank alone shall be presented
together with the classification of the secondary containment alone.
4.4.2 Thermoplastics secondary containments
Secondary containments made from thermopplastics may either be declared as Class F without the need for
testing or the material shall be tested and classified according to EN 13501-1, mounted and tested in
conditions representative of the product’s intended use.
4.4.3 Steel secondary containments
Steel secondary coontainments shall be classified according to 4.4.2.1 or 4.4.2.2.
4.4.2.1 Secondary containments made from hot dip zinc/zinc-aluminium coated steel sheets may be
declared as Class A1 without testing. Steel coated with any coating system, where the coating system
contains ≤ 1,0 % by weight or volume (whichever is the more onerous) of homogeneously distributed organic
material, or has a gross calorific potential (PCS) ≤ 2,0 MJ/kg when tested according to EN ISO 1716, may also
be declared Class A1.
4.4.2.2 Secondary containments made from steel with coatings other than in 4.4.2.1 shall be tested and
classified according to the following:
 for coating systems with a PCS ≤ 2,0 MJ/kg when tested according to EN ISO 1716, the product may be
classified A1,
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prEN 15724:2007 (E)
2
 for coating systems with a PCS ≤ 2,0 MJ/m , the product may be classified A1 provided that the coating
system, when tested according to EN 13823 as below, meets the requirements for this class given in
EN 13501-1,
2
 for coating systems with a PCS > 2,0 MJ/kg and ≤ 4,0 MJ/m when tested according to EN ISO 1716, the
complete coating system shall be tested according to EN 13823 on either the calcium silicate or fibre
cement substrates given in EN 13238. If the coating system meets the requirements of Class A2, the
product shall also be classified Class A2 with appropriate smoke and droplets sub-classification,
 for any coating system other than those mentioned above, the coating shall be tested as described above
against the requirements of classes lower than A2 and the product shall be given the same class as the
coating system.
As an alternative to the above requirements, the coated product itself shall be tested and the classification
requirements of EN 13501-1 shall apply. For tests according to EN 13823, the product shall be mounted and
fixed in a manner representative of its intended end use.
Results obtained for a coating system included an organic layer apply to any other coating system containing
the same composition as the system tested but having less organic material and, therefore, a PCS which is
less than that tested. The PCS of the organic coating may be derived by calculation.
4.5 Electrostatic behaviour
Electrostatic behaviour is not a characteristic of the secondary containment or the material of the secondary
containment but a phenomenon resulting from some storage media and the filling procedure. Manufacturers
shall provide durable notices on all sizes of tanks with appropriate wording drawing the user's attention to
filling procedures according to CLC/TR 50404 for flammable liquids with a flash point < 55 °C.
5 Design
5.1 Support
The manufacturer shall provide instructions for appropriate secondary containment support.
5.2 Venting
The secondary containment shall not influence the venting of the tank.
5.3 Suction/outlet system
Secondary containments shall be equipped with openings permitting the safe and reliable connection of
withdrawal systems. All fittings shall be of known corrosion resistance to the liquids they are designed to come
in contact with.
5.4 Drainage
It shall be possible to drain any liquid from the secondary containment from above the minimum capacity level
of the secondary containment.
5.5 Inspection facilities
Where necessary, facilities for inspection of the tank/tank content shall be designed so that they shall not
affect the performance of the secondary containment.
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prEN 15724:2007 (E)
5.6 Minimum capacity
The minimum capacity of the secondary containment shall be defined by the type as follows:
 Type 1: the secondary containment shall be able to contain the maximum filling capacity of the inner tank;
 Type 2: the secondary containment shall be able to contain 110 % of the brimful capacity of the inner tank.
5.7 Identification of leakage
Leakage shall be visible through the translucent walls of the secondary containment. Otherwise an optical or
acoustic leak detection device according to EN 13160-4 is required.
5.8 Lid or cover of the secondary containment
All secondary containments declared for installation outdoors shall be fitted with a lid or cover which shall be
designed and manufactured to prevent the ingress of water and/or deleterious material.
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prEN 15724:2007 (E)
6 Secondary containment requirements
6.1 Thermoplastics secondary containments
Secondary containments made of thermoplastics shall be tested and fulfil the requirements according to
Table 3.
Table 3 — Thermoplastics secondary containment requirements
Property Requirement Test method
Visual appearance There shall be no bubbles, blisters or other defects in the secondary A.1
containment wall, which could cause a hole or fracture.
Mass The minimum mass shall be the mass of the lightest secondary containment Clause B.3 of
a
as determined by the initial type test.
EN 13341:2005
b
Blow moulded For tanks with a maximum filling capacity up to Clause B.4 of
Wall thickness
a
polyethylene including 1 500 l, the minimum wall thickness of the
EN 13341:2005
secondary containment shall be 2,0 mm.
For tanks with a maximum filling capacity in excess of
1 500 l, the minimum wall thickness of the secondary
containment shall be not less:
values according to Table 4 of EN 13341:2005 minus
1 mm.
Rotationally For tanks with a maximum filling capacity up to Clause B.4 of
a
moulded including 1 500 l, the minimum wall thickness of the
EN 13341:2005
polyethylene secondary containment shall be 2,5 mm.
For tanks with a maximum filling capacity in excess of
1 500 l, the minimum wall thickness of the secondary
containment shall be not less:
values according to Table 5 of EN 13341:2005 minus
1 mm.
Polyamide 6 The minimum wall thickness shall be 2,0 mm Clause B.4 of
a
EN 13341:2005
Minimum capacity The minimum capacity of the secondary containment shall be of Type 1 or 2, A.3
as declared by the manufacturer.
Deformation  The secondary containment shall be leaktight for at least 500 h. A.6
After 500 h, the deformation shall not exceed 250 mm on each face of the
secondary containment.

Impact resistance The assembly, tank and secondary containment, shall remain leak tight. A.7
Performance against No leakage under the water level after 30 min shall occur. Clause A.8
c
heat effects
Air leak tightness The secondary containment shall be leaktight. A.9.1
Water leak tightness The secondary containment shall be leaktight during at least 500 h. Clause A.10
a
Change the word "tank" to "secondary containment" in the text of the test method.
b
Except for the lids, if any.
c
Only applicable for secondary containments installed indoors when required by regulations in the county of use.

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prEN 15724:2007 (E)
6.2 Steel secondary containments
Secondary containments made of steel shall be tested and fulfil the requirements according to Table 4.
Table 4 — Steel secondary containment requirements
Property Requirement Test method
Visual appearance There shall be no visible defects which could affect the performance of the A.1
secondary containment.
Wall thickness Where the secondary containment is made from hot dip zinc/zinc-aluminium A.2
coated steel sheets, the minimum wall thickness according to EN 10143 shall
be:
– 1,0 mm for the body of the secondary containment,
– 0,7 mm for the cover of the secondary containment.
Where the secondary containment is made from steel sheets with other
coatings or without coating, the minimum wall thickness of the stele sheets
without the coating shall be :
– 1,0 mm for the body of the secondary containment,
– 0,7 mm for the cover of the secondary containment.
Minimum capacity The minimum capacity of the secondary containment shall be of Type 1 or 2, A.3
as declared by the manufacturer.
Resistance of The variation of the tensile strength shall not exceed 50 % of the initial value A.4
sealing material to oil after each duration of immersion.
Resistance to salt After 350 h, the corrosion area shall not exceed 5 % of total external surface A.5
spray area.
Deformation After 500 h, the deformation shall not exceed 250 mm on each face of the A.6
secondary containment.

Impact resistance The assembly, tank and secondary containment, shall remain leak tight. A.7
Performance against No leakage under the water level after 30 min shall occur. A.8
a
heat effects

Leak tightness The secondary containment shall be leaktight. A.9.2
Water leak tightness The secondary containment shall be leaktight during at least 500 h. A.10
a
Only
...