Auxiliary Steam common Header Charging
Auxiliary Steam common Header Charging SYSTEM DESCRIPTION : Aux steam system includes four ways of steam source: Start-up boiler or aux boiler,(If it is available in plant ) Low-temperature reheated steam supply Main steam steam supply line Near by unit common header In normal, each unit aux steam is supplied by CRH steam. There is interconnection between aux steam headers of all units and also connected to start-up aux boiler. Parameters of aux steam are: Aux steam pressure normal range: 8-12 kg/cm2 Aux steam normal temperature: 300-350 deg C. Initial conditions Aux boiler is running hot boxed-up condition station APRDS Pre Checks & Charging Procedure: Ensure that Auxiliary Boiler is ready for Aux Steam header charging from aux. boiler. Generally temperature maintain before charging from aux boiler between range is 180 to 300 deg C and pressure is 4 to 5 Kg/cm2 All the way from Auxiliary boiler MS stop valve to Start up steam