Posted By Stu Haysman Hello, We use refillable LPG cylinders for powering mobile floor cleaners and counterbalance trucks in our workplace. All our machines bar one have the bottle mounted lying flat and we refill them 'in-situ' on the machine as per supplier guidance. One machine however has the bottle mounted standing upright so we have also been refilling it upright in the absence of any contrary information from the supplier (i.e. their guidance does not specify). However, an engineer from another company informed us that this is extremely dangerous - refilling LPG bottles upright can lead to overfilling, thus removing the expansion space within the cylinder. The pressure in the cylinder can rise (if the cylinder is warmed whilst on the truck) and this can result in rupture of the cylinder with obvious results. Does anyone have any information as to whether this is true? If the cylinder has internal valving allowing it to be run upright, does it not follow that it can also be refilled the same way? If it has been overfilled already, can this weaken it structurally and if so how do we get it tested, or just simply replace it? The logical next step would be to speak to the supplier, but their tech support chap is typically on holiday for a week..... So at the moment we have an expensive machine sitting idle. Advice appreciated! Many thanks Stu

Posted By Brett Day I'm inclined to agree with Frank about charging in plant. In the refridgeration and air conditioning industry where gases are reclaimed and systems are charged putting the empty cylinder on scales and charging till the weight equals a full cylinder is an accepted safe practice. Notes of caution I would add is that whilst charging there is the risk of vapour and also charging needs to be progressive to prevent heating of the cylinder.