It is easy to identify a substandard, counterfeit gas cylinder bottle. Some details can't be hidden, it's just too easy to spot. For example, there are many gas cylinder bottles that are labelled as 3kg or 6kg cylinder capacity, that are actually manufactured undersize, with less or more. They have been repaired, refurbished and repainted for reuse. These gas bottles are extremely dangerous for use.

This is as a result of the manufacturing and design. They are either not tested or failed quality assurance inspection. You can use a digital scale to know the actual size. Tare weight is the empty weight of the gas bottle cylinder. Along with the gas bottle dimensions, they can vary greatly by manufacturer. However, older bottles tend to be heavier than more recent versions.... continue reading here https://www.naijalpg.com.ng/2022/12/how-to-spot-fake-lpg-gas-cylinder.html?m=1