Bombola fuori o fornello ad alcool.

[IanSolo]

La normativa per le installazioni utilizzanti LPG per il diporto e' la "ISO 10239" di dui riporto una parte (in inglese, ma ho solo questa versione e non ho tempo di tradurla):

....
7 Appliances
7.1 Only appliances suitable for use with LPG in a marine environment shall be installed in the system.
They shall be fitted in accordance with the manufacturer's instructions for installation in small craft.
7.2 Each LPG consuming appliance shall be securely fixed to the craft so as to eliminate undue stress on
piping, hose and fittings.
7.3 Each gas consuming appliance, including gas lamps, shall be equipped with flame supervision devices
which control all burners and pilot lights.

...
8 Location and installation of LPG cylinders
8.1 LPG cylinders, regulators and safety devices shall be secured against any movement that is expected to result from marine service.
8.2 LPG cylinders, pressure regulators and safety devices shall be installed in cylinder lockers or cylinder housings.
8.3 Cylinders, pressure regulators and safety devices located below decks or in cockpits shall be mounted in cylinder lockers which, when closed, are vapour-tight to the craft interior and vented at the bottom by a drain of not less than 19 mm inside diameter or the equivalent area if not circular. The cylinder locker shall be openable only from outside the craft interior. Cylinder lockers located in cockpits may be openable from inside the cockpit if the locker can be opened only from the top.
8.4 The locker drain shall be run outboard, i.e. to the outside of the craft, and shall be
⎯ without sumps which can retain water; and
⎯ with the outlet at a level lower than the locker bottom and as high as practicable, but not less than 75 mm above the at-rest waterline and above the waterline at a heel angle of 15 degrees when in the fully loaded ready-for-use condition.
8.5 All hoses or metal piping penetrating the locker walls shall be sealed at the wall so as to maintain vapour tightness to the craft interior.
8.6 Cylinder locker drain openings and cylinder housing ventilation openings shall be located at least 500 mm from any hull opening to the interior of the craft.
8.7 No provision for storage of loose components that could damage the cylinder, pressure regulator, piping or hose installation, or obstruct the locker drain, shall be made in a cylinder locker or cylinder housing.
8.8 Cylinders, valves and pressure regulators shall be installed so that they are readily accessible, and are secured rigidly in their intended position so that only gas in the vapour phase is withdrawn during use.
8.9 Provisions for storage of unconnected LPG cylinders, whether filled or empty, shall be the same as cylinders connected to the system. See 8.2.


Ho la sensazione che quel tipo di installazione che si vede in fotografia non sia per impiego nautico come richiesto al punto 7.1 (ma potrei sbagliarmi), comunque per impianti con bombola separata e' indicato che vi sia un vano stagno con scarico verso l'aperto in caduta libera (LPG e' piu' pesante dell'aria) con diametro di almeno 19 mm e con pendenza di almeno 15 gradi uscente a piu' di 75mm sopra il massimo livello d'acqua, immagino che regole analoghe possano essere previste anche in questo caso pensando ad un buon progetto.