ÖNORM EN 45510-6-1

This standard gives guidance on writing the technical specification for the procurement of deaerators associated with steam generating plant and steam turbine plant for use in electricity generating stations (power stations). This Guide for procurement is not applicable to equipment for use in the nuclear reactor plant area of nuclear power stations. Other possible applications of such equipment have not been considered in the preparation of this Guide. This Guide Covers all types of deaerators installed in power plants whose function is to accept condensate from the LP (low pressure) feed train, to heat and deaerate the water to a specified level and then supply it as feed to the feed pumps. The feedwater storage tank provides a reservoir of deaerated feedwater to satisfy system transient and feed pump suction requirements. It also acts as a receiving vessel for HP (high pressure) heater drains and feed pump recirculation flows. The term deaerator in this context is taken to include the deaerating tower or dome, the feedwater storage tank and associated plant. The equipment covered by this Guide is defined by its function rather than design type. Therefore, the guidance to the specification is stated in performance terms rather than being specified by a detailed description of the equipment to be supplied.