How can be calculated the collapse pressure (external) of a not vulcanized rubber hose?

Question

I am trying to evaluate at which pressure a not vulcanized rubber hose (therefore a viscous material) will start to collapse.

The pressure is from outside of the hose.

Answer 1

when the pressure outside  the hose start to exceed the normal atmospheric pressure which is  inside of the hose walls, the hose will collapse . therefore to achive any increase in pressure outside the hose, it should be proportion to the increase of pressure inside the hose too or if possible there should be a material inside the hose that can with stand the pressure as in a steel shaft,in order not to collapse it. i assume you are referring to the curing and curing pressure needed  in manufacturing rubber hoses.