BS EN 12816-2010 pdf download.LPG equipment and accessories – Transportable refillable LPG cylinders – Disposal.
BS EN 12816 specifies methods for the safe gas freeing and disposal of refillable LPG cylinders manufactured from steel, composite materials and aluminium, of water capacity 0,5 litres up to and including 150 litres.
This European Standard is applicable to the following:
– welded and brazed steel LPG cylinders with a specified minimum wall thickness (see EN 1442 and EN 12807 or equivalent standard):
— welded steel LPG cylinders without specified minimum wall thickness (see EN 14140 or equivalent standard);
— welded aluminium LPG cylinders (see EN 13110 or equivalent standard):
— composite LPG cylinders (see EN 14427 or equivalent standard).
This European Standard is intended to be applied to cylinders complying with ADR (incluaing p1 marKed
cylinders) and also to existing non ADR cylinder populations.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 14912, LPG equipment and accessones — Inspection and maintenance of LPG cylinder valves at time of periodic inspection of cylinders
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
liquefied petroleum gas
3.1 LPG mixture of predominantly butane or propane with traces of other hydrocarbon gases classified in accordance with UN number 1965, hydrocarbon gases mixture, liquefied, NOS or UN number 1075, petroleum gases, liquefied
NOTE In some countries. UN numbers 1011 and 1978 may also be designated LPG.
3.2 gas free with an LPG concentration in air less than 20 % of the lower explosive limit
4 Gas freeing of cylinders
4.1 Cylinder disposers shall remove LPG from cylinders by:
— returning to an LPG storage tank via a suitably designed pumplcompressor system, or
flaring through a purpose designed flare stack fitted with a flame arrestor as required, or
— venting through a purpose designed high level vent, in a controlled manner, that ensures that the vented gas is diluted to less than 20 % of the lower explosive limit before it reaches ground level, or any potential source of ignition, or
— a combination of any of these options.
For safety and environmental protection reasons the first option is preferable. However it is recommended that, at a minimum, the liquid contents of cylinders should always be returned to an LPG storage tank.
4.2 Equipment used for removal of LPG shall be capable of removing liquid LPG from any cylinder however full. It should also be capable of removing LPG vapour so that the internal pressure is reduced to atmospheric.
4.3 Cylinders shall be made gas free by a safe means, for example:
— evacuation, or purging.
NOTE 1 Where water is the purging fluid, waste water should be recycled where possible for further purging applications.
NOTE 2 Where possible, the recovery of the gas should be maximised in a dosed loop system and stored for re-use.
4.4 Any flammable liquids remaining in the cylinder (e.g. oily residues) shall be removed and disposed of in a suitable manner before the cylinder can be considered gas free.
4.5 Cylinders shall be checked to ensure that they are depressurised and gas free prior to disposal.
4.6 Valves and other fittings shall be:
— scrapped and recycled, or
— inspected/reconditioned in accordance with EN 14912 for re-use.
5 Disposal of cylinders
5.1 Disposal shall only take place after a cylinder is made gas free and the cylinder valve has been removed.
5.2 Cylinders shall be made unserviceable for storing LPG by any of the following methods.
— mechanical crushing;
mechanical shredding;
— piercing holes of 50 mm diameter or more, in at least two places;
— irregular cutting of the neck of the cylinder;
irregular cutting of the body of the cylinder, into two or more pieces.
NOTE Noise levels from the above methods should be evaluated and measures put in place to minimise the impact upon the external environment.
5.3 Cylinders made unserviceable in accordance with 5.2 shall be considered as scrap material for disposal and recycled in order to maximise the re-use of scrap material and minimise the total energy life cycle of the cylinders. The cylinder disposer shall endeavour to minimise wastage of material by selecting the most appropriate scrapping method.
NOTE Any coatings on cylinders may affect recycling methods and should be taken into account.
5.4 Composite cylinders shall be disposed of in accordance with the manufacturers’ instructions, e.g. the recycling of thermoplastic parts and metallic liners, the grinding of thermoset parts.BS EN 12816 pdf download.