BS EN 521:2006 pdf download – Specifications for dedicated liquefied petroleum gas appliances — Portable vapour pressure liquefied petroleum gas appliances This requirement shall also be met when the appliance is fitted with optional parts (for example: lampextension posts). These requirements shall be met under the test conditions described in 6.5.2. 5.6Soundness of the gas circuit assembly Holes for screws,pins,etc, intended for the assembly of components shall not open into the space reservedfor the gas ways leading to the injector. The soundness of parts and assemblies connected to the gas circuit shall be assured by means of metal-to-metal joints or joints with seals (for example,flat-faced joints,O-rings or gaskets), i.e. excluding the use of anyproduct which ensures soundness in the threads.For parts that do not require to be dismantled during normalmaintenance, for example taps, the use of thread sealing compounds is permitted. Removable components or the threaded parts of the gas pipework which may be dismantled during normalmaintenance shall remain sound after five disconnections and re-connections in accordance with theinstructions, if necessary after changing a gasket. Soft solder (see definition in 3.8) shall not be used to ensure the soundness of the gas circuit. However it ispermitted for internal connections within the gas circuit when they do not involve soundness. Conformity shallbe verified based on the manufacturer’s specifications. Under the test conditions defined in 6.6.1, during each of the tests no.1 and 2, the leak shall not exceed0,07 Ih (1 013 mbar, 20 C).This requirement shall also be met after all the tests on the appliance have beencarried out, but before any dismantling of parts subjected to the soundness tests. 5.7Connections 5.7.1General Whatever the type of gas container (pierceable cartridge, cartridge fitted with a valve, cartridge with or withoutcentre boss，refillable reservoir….),when following the instructions, connection of the appliance to the gascontainer shall be easy with minimal, if any, gas leakage. For appliances with direct rigid connection to the gas container(s), the CE Type Examination technical file forthe appliance shall include diagrams and specifications of the gas containers (including their gas outletconnections) intended for the gas supply to the appliance. 5.7.2Appliances directly fitted to the gas container 5.7.2.1 Appliances fitted to pierceable cartridges a) design/construction of the appliance shall be such that there is no foreseeable replacement procedure sequence possible which can lead to an unsafe and/or unintended piercing of the cartridge by the user. (See in Annex C examples of authorized...
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