Hydrogen Purging



Ø  SLC AS SOP Off, SLC DC SOP Off, SLC H2 SOP Off
Ø  Suppy of DC SOP Off
Ø  Start one AC SOP ( DP=1.5 ksc)
Ø  Dew Point Air=<-10 Deg, clearance from Chemist
Ø  H2 (Isolated Position), CO2(Isolated Position), Air Inlet(Open), Casing vent ( Closed)
Ø  Fill and Pressurise upto 0.5 ksc
Ø  After that, cut out Air supply and Detach Hose of air to Filter
Ø  CO2 cylinders in rack, CO2 Flash Evaporator On(SLc made ON), Hot Water Lined up to Filling room, Pour water on cylinder
Ø  Maintain Manifold Pr=50 ksc
Ø  Filling CO2: H2 (Vent Position), CO2(Inlet Position), Air Inlet(Close), Manitain Co2 (0.3-0.8 ksc) by Casing vent
Ø  Continue Till purity of Co2 comes more than, 99%, Purge other Drier by changeover, Purge LLD, clearance from Chemist(25-35 Cylinders)
Ø  CO2 supply Out: CO2 (Vent Position), H2 (inlet position), Air inlet(Close), mainatain b/w 0.3 t0 o.8 ksc Pressure by Casing Vent
Ø  Continue Till purity of H2 comes more than, 99%, Purge other Drier by changeover, Purge LLD, clearance from Chemist: (90-100 Cylinders)
Ø  Pressurization: Co2 (Isolated), H2 (Inlet Position), Air( Closed Position), Casing Vent( Close ): (50-70 cylinders)
Ø  Start H2 SOP when As SOP reaches 4.5 ksc,SLC AS SOP, SLC H2 SOP, DC SOP to be normalised
Ø  Build Pressure of H2 upto 3.35 ksc, cut out H2 supply
Ø  H2(ISolated), CO2(Isolated), AIr(Close), Casing Vent ( Close)

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