In brief
Reinforcement is a functional part of the structure.
Useful to know
HELLA describes brake hoses of a special rubber mixture with a built-in braid for reinforcement and pressure resistance. Tests include leaks, pressure bursts, and cold bending. [1]
This is not an ordinary hose, which is selected only by diameter. Joining, length and specific application are essential. Visible external state is useful information, but does not certify all internal properties. In case of suspected failure, no home test with random pressure shall be performed; the brake system procedure shall be used.
Sources
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