Patent ID: 11964816
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Handling (Mechanical engineering)
Classification: CPC B  G | IPC B

Claim 0:
1. A method comprising:
performing a hydrostatic test on a sulfur storage tank comprising:
a bottom plate;
an outer wall surrounding and coupled to the bottom plate; and
a cleanout door installed on the outer wall, the cleanout door comprising:
an edge abutting the bottom plate; and
a drain nozzle installed on the cleanout door, the drain nozzle defining a centerline offset from the edge, wherein the drain nozzle is configured to gravity drain fluid from the sulfur storage tank;

after performing the hydrostatic test, draining fluid from the sulfur storage tank using a pump until a liquid level within the sulfur storage tank reaches a first liquid level; and
after draining fluid from the sulfur storage tank using the pump, gravity draining fluid from the sulfur storage tank through the drain nozzle.