Tender For Cryovessel Maintenance, I. Leak Test & Evacuation Of Iocl Make Cryogenic Vessels To Ensure No Leakage Condition Exists Or To Confirm The Presence Of Leakage By Breaking The Existing Vacuum Level By Dry Nitrogen And All O Rings Attached To The Vic Applying Combined Test Methods (Pressure-Cum-Vacuum) & Evacuation Not Less Than 0.02 Millibar (Measured By Duly Calibrated Digital Pirani Gauge) Of Iocl Make Cryogenic Vessels. Ii. Painting Of Iocl Makes Cryogenic Vessels. Civil Base Construction Of Iocl Make Cryo-Vessels. Iv. Installation & Supervision Of Commissioning Of Iocl Make Cryo-Vessels (Ln Will Be Supplied Free Of Cost By Blda).