Systems and methods for venting tanks to enhance transporting asphalt

A system to vent a tank to enhance transporting asphalt when positioned in the tank, the system comprising:

• a vapor box to connect to an upper surface of a tank, the vapor box comprising:
• a cover including a vent aperture,
• an inlet connected to the tank and positioned to provide fluid flow between an interior of the tank and an interior of the vapor box, and
• a barrier extending between the cover and the inlet, the interior of the vapor box at least partially defined by the cover, the inlet, and the barrier;
• a valve (a) associated with the vent aperture, (b) positioned to extend through the cover such that a portion of the valve resides in the interior of the vapor box and another portion of the valve resides in an exterior of the vapor box, and (c) configured to provide fluid flow between the interior of the vapor box and the exterior of the vapor box;
• and
• a selector positioned spaced from and in communication with the valve and to cause the valve to change between (a) an open condition providing, during off-loading from the tank, (i) pressure equalization between the interior of the tank and the exterior of the tank and (ii) vapor flow between the interior of the vapor box and the exterior of the vapor box via the vent aperture and (b) a closed condition preventing fluid flow between the interior of the vapor box and the exterior of the vapor box via the vent aperture.

A system to vent a tank to enhance transporting asphalt when positioned in the tank, the system comprising:

• a vapor box to connect to a tank, the vapor box comprising:
• a cover including one or more vent apertures,
• an inlet connected to the tank and positioned to provide fluid flow between an interior of the tank and an interior of the vapor box, and
• a barrier extending between the cover and the inlet, the interior of the vapor box at least partially defined by the cover, the inlet, and the barrier;
• a valve associated with the one or more vent apertures, positioned to extend through the cover such that a portion of the valve resides exterior to the vapor box, and configured to provide fluid flow between the interior of the vapor box and an exterior of the vapor box;
• and
• a selector positioned spaced from and in communication with the valve and to cause the valve to change between an open condition providing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures and a closed condition preventing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures.

A system to vent a tank to enhance transporting asphalt when positioned in the tank, the system comprising:

• a vapor box to connect to a tank, the vapor box comprising:
• a cover including one or more vent apertures,
• an inlet to connect to the tank and be positioned to provide fluid flow between an interior of the tank and an interior of the vapor box,
• a barrier extending between the cover and the inlet, the interior of the vapor box at least partially defined by the cover, the inlet, and the barrier, and
• a base connected to the barrier and defining an opening, the base having (a) a first portion extending from the barrier toward the opening at an angle oblique with respect to at least a portion of the barrier and (b) a second portion extending from the barrier toward the opening at an angle oblique with respect to at least a portion of the barrier and the first portion;
• a valve associated with the one or more vent apertures and positioned to provide fluid flow between the interior of the vapor box and an exterior of the vapor box;
• and
• a selector positioned spaced from and in communication with the valve, thereby in operation to cause the valve to change between an open condition providing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures and a closed condition preventing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures.

A system to vent a tank to enhance transporting asphalt when positioned in the tank, the system comprising:

• a vapor box to connect to a tank, the vapor box comprising:
• a cover including one or more vent apertures,
• an inlet to connect to the tank and be positioned to provide fluid flow between an interior of the tank and an interior of the vapor box,
• a barrier extending between the cover and the inlet, the interior of the vapor box at least partially defined by the cover, the inlet, and the barrier, barrier including:
• a first end wall, a second end wall opposite the first end wall, a first side wall extending longitudinally between the first end wall and the second end wall, and a second side wall opposite the first side wall and extending longitudinally between the first end wall and the second end wall,
• a first baffle disposed between a base and the cover and extending between the first side wall and the second side wall, the vapor box defining a longitudinal vapor box axis extending between the first end wall and the second end wall, and
• a second baffle defining a second baffle dimension in a direction parallel to the longitudinal vapor box axis exceeding an inlet dimension defined by the inlet in the direction parallel to the longitudinal vapor box axis;
• a valve associated with the one or more vent apertures and positioned to provide fluid flow between the interior of the vapor box and an exterior of the vapor box;
• and
• a selector positioned spaced from and in communication with the valve, thereby when operated to cause the valve to change between an open condition providing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures and a closed condition preventing fluid flow between the interior of the vapor box and the exterior of the vapor box via the one or more vent apertures.