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Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connection with boilers -- Specification for valves, mountings and fittings
This Part of this British Standard specifies requirements for steam and water fittings excluding safety valves for boiler installations where the steam pressure exceeds 1 bar gauge or, in the case of hot water boilers, the rating is 44 kW and above.
It also specifies requirements for fittings for boilers used exclusively for the following:
It deals with valves, boiler blowdown mountings, water level gauges, high and low water level alarms, pressure gauges, test connections and fusible plugs.
Where appropriate, general recommendations relating to the installation of fittings are included for the guidance of users.
Additional requirements specific to steam and hot water boilers, arranged for automatic working, are given in section 5.
This Part does not cover fittings for boilers used in open vented hot water systems working at temperatures not exceeding 100 °C nor for storage water heaters of the unvented type which normally operate at temperatures not exceeding 82 °C and at pressures not exceeding 10 bar1).
For such boilers within the scope of BS 779 and BS 855 the requirements are incorporated in those standards.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
Specifies requirements for safety fittings excluding safety valves for boiler installations where the steam pressure exceeds 1 bar gauge or, in the case of hot water boilers, the rating is 44 kW and above.
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