Dual-wall integrated flange joint

A dual-wall integrated flange joint comprising:

• an inner wall having a first inlet fluidly coupled with a first outlet and a second inlet fluidly coupled with a second outlet, such that the first inlet and the second inlet are not fluidly coupled with each other;
• a flange extending radially outward from the first and second outlets of the inner wall;
• and
• a collar extending from the flange in the direction of the inner wall and surrounding at least a portion of the inner wall,
• wherein the dual-wall integrated flange joint is formed of a single piece of material, the collar at least partially defines an outer wall, and a volume between the collar and the inner wall at least partially defines an airgap, such that each one of the first inlet and the second inlet can be separately connected to an outlet of an inner wall of another dual-wall integrated flange joint.

A dual-wall integrated flange joint for exhaust gas, the joint comprising:

• an inner wall having a first portion defining at least one inlet and a second portion defining at least one outlet, the second portion being weldable to a first additional component;
• a flange extending radially outward from the inlet of the inner wall;
• and
• a collar having a distal portion extending from the flange in the direction of the inner wall and surrounding at least a portion of the inner wall, the distal portion being weldable to a second additional component;
• wherein the inner wall, the flange, and the collar of the dual-wall integrated flange joint are formed of a single unitary piece of material, the collar at least partially defines an outer wall, and the inner wall extends further than the collar in a direction from the at least one inlet to the at least one outlet, such that a volume between the collar and the inner wall at least partially defines an airgap of an airtight insulation preventing the outer wall from coming into contact with the inner wall.