CEN/TC 249/WG 25 - Static thermoplastic tanks for above ground storage of fuel

This European Standard specifies requirements for materials, physical properties and performance for blow moulded and rotationally moulded polyethylene single tanks, with or without reinforcement, for the above ground storage of chemical liquids having a maximum specific gravity of 1 400 kg/m3 except water and those liquids dealt with by EN 13341.
It is only applicable to static blow moulded or rotationally moulded polyethylene tanks, which are subjected to atmospheric pressures but not subject to any external loading and having a volume of 400 l to 10 000 l. Except for periodic temperature fluctuation their normal operating temperature does not exceed 25 °C.
Tanks according to this European Standard are expected to have a period of intended use of 10 years.
This European Standard specifies test methods and factory production control tests as well.
NOTE   National and/or international regulations above and beyond the requirements of this standard may apply to the storage of liquids and the installation of tanks.

This document specifies requirements for materials, physical properties and performance of single blow moulded and rotationally moulded polyethylene tanks and of rotationally moulded tanks made of anionically polymerized polyamide 6, with or without reinforcements, for above ground storage of domestic heating oil, kerosene and diesel fuels for the supply of building heating/cooling systems.
It is only applicable to static blow moulded and rotationally moulded polyethylene tanks and to rotationally moulded tanks made of anionically polymerized polyamide 6 that are subject to atmospheric pressure, but not subject to any external loading and have a capacity from 400 l up to 10 000 l.

This standard establishes rules for the design and calculation of welded static,vertical, non-pressurised, cylindrical, flat-bottom thermoplastic tanks. This standard applies to tanks fabricated in the following thermoplastics: Polyethylene (PE), Polypropylene (PP), Poly (vinyl chloride) (PVC), Poly (vinylidene fluoride) (PVDF). This standard does not take into account wind and/or snow loading. If wind or/and snow loading has to be taken into account additional calculations are necessary.

This part of this standard specifies the design and calculation of circular flanged joints, fabricated in the following thermoplastics: Polyethylene (PE), Polypropylene (PP), Poly (vinyl chloride) (PVC), Ply (vinylidene fluoride) (PVDF)

This standard specifies general principles for welded static non-pressurised thermoplastic tanks. It applies to work shop and site fabrications. The standard covers tanks with a capacity of 0,45 m3 (450 litres) and above. Tanks which comply with the requirements of this standard are not intended to withstand internal pressure or vaccuum other than that which may occur during the transfer of fluids (including gases) in their normal operation.

This standard specifies the design and calculation for single sking rectangular tanks, fabricated from the following thermoplastics: Polyethylene (PE), Polypropylene (PP), Poly (vinyl chloride) (PVC), Poly (vinylidene fluoride) (PVDF). The tanks may be strengthened on the outside by means of ribs or frames made of the same or other materials. This standard is only applicable to tanks which are not intended to withstand internal pressure or vaccuum, other than that which may occur during the transfer of fluids (including gases) in their normal operation.

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.