To minimise the risk of a potential pressure system explosion, a steam powered engine needs to have regular checks and comply with industry practice. Any steam powered engine installation pressure system must have a current inspection certificate, issued by a competent boiler inspector. For your own protection it's recommended that the pressure system is covered for third party risks by a current insurance policy.
If the boiler is fuelled by Liquefied Petroleum Gas (LPG) it must comply with Part Seven of these Standards. If the boiler is fuelled by diesel, paraffin or similar fuels the fuel installation must comply with this part of this Standard. In the case of a dual fuel system a flame failure device is not required as long as the boiler is constantly attended when in use. [2.25]