Here is a typical parts list for a rectangular 5KL (5,000-liter) Lube Oil Storage Tank. The actual parts may vary depending on the manufacturer and design, but the general components are:

1. Tank Body:
Tank Shell (rectangular, made of steel or stainless steel)
Tank Bottom (flat or slightly sloped for draining)
Tank Roof (may be flat or dome-shaped, depending on design)
Internal Baffles (for stabilization of oil during movement)
2. Inlet and Outlet:
Inlet Pipe (with flange, ball valve, and strainer)
Outlet Pipe (with flange, ball valve, and check valve)
Overflow Pipe (for excess oil or pressure relief)
Vent Valve (to allow air circulation)
3. Manholes & Access Points:
Manhole(s) (for inspection and cleaning, often with gasket seals)
Inspection Hatch (for easy access to internal tank)
Drain Plug (at the lowest point for emptying the tank)
4. Level Monitoring System:
Level Gauge (mechanical or electronic for monitoring the oil level)
High/Low Level Alarms (to alert when the tank reaches full or empty levels)
5. Safety & Pressure Relief:
Pressure Relief Valve (to release excess pressure in case of over-pressurization)
Safety Relief Valve (for emergency scenarios)
6. Piping and Fittings:
Flanges (for securing pipes to the tank)
Valves (ball valves, check valves, vent valves)
Piping (for oil input/output and vent lines)
7. Corrosion Protection:
External Coating (anti-corrosion paint or galvanizing)
Internal Lining (corrosion-resistant coating for oil contact)
8. Support and Foundation:
Tank Base Support Structure (for stability)
Anchor Bolts (for securing the tank to the foundation)
Tank Skirt (if required, to support the tank structure)
9. Instrumentation:
Temperature Sensor (for monitoring the oil temperature)
Flow Meter (optional, for monitoring oil input/output)
Level Transmitter (for automated monitoring)
10. Auxiliary Components:
Filter (Optional) (for filtering incoming oil)
Pump (Optional) (for transferring oil from the tank)
Heaters (Optional) (for maintaining oil temperature)
11. Electrical Components:
Lighting (for the interior of the tank area)
Control Panel (for managing alarms, sensors, and pumps)
These components together create a safe and functional system for storing and handling lube oil. Depending on the design and usage requirements, additional features such as fire suppression systems, heating, and cooling systems might also be included.