BS EN 521:2019 pdf free.Specifications for dedicated liquefied petroleum gas appliances – Portable vapour pressure liquefied petroleum gas appliances.
BS EN 521 The requirements apply to these appliances or their functional sections whether or not the latter are independent or incorporated into an assembly. Appliances covered by this document are not connected to a flue for the discharge of products of combustion and are not connected to the mains electricity supply. This document covers neither appliances supplied with LPG in the liquid phase nor appliance with fixed integral container which may or may not be refilled by the user  It does not apply to lighters as defined in EN ISO 9994.It does not apply to gas appliances operating with a valve cartridge which is horizontally integrated into the chassis of the appliance also called“flat portable gas stove”. Requirements for rational use of energy have been included for stove burners. However, such requirements have not been included for the other types of appliances because: for grills and barbecues, this is a type of cooking which is achieved by various means such as radiant elements; in addition this type of cooking varies according to the type of food and region where the appliance is used; 一for lighting appliances, the consumption is insignificant because these appliances have a very low rate and are used only for a few hours in a year; -for heating appliances, all the heat produced is discharged into the environment;-for tools such as blowtorches which are not professional tools in regular use, the gas consumption depends very much on the way it is used.Non-metallic materials used as radiant elements in appliances (for example volcanic rocks, refractory blocks) shall be of a quality suitable to their use. The quality and thickness of materials used in the construction of appliances shall be such that the constructional and performance characteristics are not altered in use. In particular all the parts of the appliance shall withstand mechanical, chemical and thermal actions to which they may be submitted during use. In normal conditions of operation, of cleaning or of adjustment, they shall not be liable to any alterations which might impair their safety.BS EN 521 pdf download.