Regulation 52

The soldering of drums or other receptacles containing dangerous petroleum or the application thereto of any operation in which fire or heat is used is prohibited except in a special soldering building which may be not less than 9 metres distant from the licensed building and shall be constructed so as to comply with the conditions laid down in rule 23(k) and not more than 295 litres of dangerous petroleum shall be kept in the soldering building at any one time.