Pressure bearing wall and support structure therefor

A pressure bearing housing assembly, comprising:

• a pressure bearing wall surrounding an interior;
• a support structure in the interior of the wall and including a flow passage therethrough;
• a fluid chamber formed between the support structure and the wall;
• and
• wherein the inner support structure configured to radially outwardly support the outer wall against a pressure differential that would otherwise inwardly collapse of the outer wall.

A method of supporting a pressure bearing wall, the method comprising:

• positioning a support structure inside of the pressure bearing wall, the support structure comprising a support for radially outwardly supporting less than the full surface area of the interior of the pressure bearin wall thereb formin a fluid chamber between the pressure bearing wall and the support structure;
• subjecting the pressure bearing wall against a pressure differential across the wall;
• and
• supporting the pressure bearing wall with the support structure against a pressure differential that would otherwise inwardly collapse of the pressure bearing wall.