VT-21-250 PSI VERTICAL STORAGE TANKS - Taylor-Wharton

Disc.Rupture Disc(PSE-1A/1B).b. Defective Rupture Disc(PSE-1A/1B).c. Atmosphere corrosion and/or discfatigue.d. Interior disc corrosion.e. Improper Rupture Disc(PSE-1A/1B).7. Tank vacuum leak. a. Leak in Vacuum Jacket Lift Plate(PSE-3).b. Vacuum Pump out Valve (HCV-6)leak.c. Vacuum Probe (VR-1) or VacuumProbe Isolation Valve (HCV-5) leak.b. Replace Rupture Disc(PSE-1A/1B).c. Replace Rupture Disc(PSE-1A/1B).d. Blow out safety device line. ReplaceRupture Disc(PSE-1A/1B).e. Install correct Rupture Disc(PSE-1A/1B).a. Refer to Analyzing VacuumDeterioration section. ReplaceVacuum Jacket Lift Plate (PSE-3).b. Replace Vacuum Pump out Valve(HCV-6) diaphragm. Re-evacuateinsulation space. Contact the factoryfor re-evacuation procedures.c. Replace faulty component. Reevacuateinsulation space. Contactthe factory for re-evacuationprocedures.30