BS 5991:2006 pdf download.Specification for indirectgas fired forced convection air heaters with rated heat inputsgreater than 330 kW butnot exceeding 2MW for industrial and commercial space heating -Safety and performance requirements.
7.1.15 Panel anchorage
Panels that are normally removed for servicing shall be fitted withanchor lines where the appliance is intended to be installed other thanat floor level. This requirement shall be deemed to be satisfied if suitablehinges are fitted.
7.1.16 Unions and flanges
Unions in fuel gasways shall be of the cone or spherical-seated type.Flange joints shall include a gasket resistant to the action of
components of the gas and suitable for the temperature to which it islikely to be exposed.
7.1.17 Flexible pipes
Flexible pipes shall be metal armoured and have screwed or flangedconnections. Flexible pipes shall withstand at least three times theworking pressure with a minimum of 3.5 bar at both maximum and minimum service temperatures. There shall be electrical continuityacross such pipes. There shall be a manual isolating valve in a readily accessible position upstream of the inlet of any section of flexible pipe.
