Regarding smooth bore hose inner core, is an 0,7mm wall thickness better than a 1mm wall thickness?

Not necessarily. Tube wall thickness can change some of the physical properties of a hose. For example, it can increase the bend radius, reduce flexibility, and increase hoop strength. It should be noted that wall thickness does not appreciably change the permeation rate or ‘effusive’ characteristics of PTFE. Permeation is a function of the relative porosity of PTFE which essentially does not change with thickness, the characteristics of the medium being conveyed, the pressure or other related factors.

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