Cold box design providing secondary containment

An apparatus comprising:

• a. a primary enclosure defining an internal volume, wherein the primary enclosure comprises primary walls, a primary ceiling, a primary floor, and a vapor venting system, wherein the primary enclosure is fabricated from a low temperature alloy, wherein at least a portion of the primary floor forms a slope to a hydrocarbon outlet, wherein a perforated plate is located on top of the hydrocarbon outlet, wherein the perforated plate is fabricated from a low temperature alloy;
• b. a secondary enclosure surrounding the primary enclosure defining a second internal volume, wherein the secondary enclosure comprises secondary walls, a secondary ceiling and a secondary floor;
• and
• c. a fire retardant agent applied to the exterior surface of the secondary enclosure.

An apparatus comprising:

• a. a primary enclosure defining an internal volume, wherein the primary enclosure comprises primary walls, a primary ceiling, a primary floor, and a vapor venting system, wherein at least a portion of the primary floor forms a slope to a hydrocarbon drainage, wherein a perforated plate is located on top of the hydrocarbon drainage, wherein the perforated plate is fabricated from a low temperature alloy;
• b. a secondary enclosure surrounding the primary enclosure defining a second internal volume, wherein the secondary enclosure comprises secondary walls, a secondary ceiling and a secondary floor;
• and
• c. a fire retardant agent applied to the exterior surface of the secondary enclosure.