Hi. Delamination of rubber hose and subsequent hose failure is simply a function of temperature, exposure to ozone and the number and magnitude and range of flex cycles. The suggestions to stretch an incorrect size hose is just wrong and will shorten the useful life of the hose. This is especially true of wire hose.
I worked for the chief research engineer
of Spaulding sporting goods for a short time and I learned a lot about rubber. Basket, tennis, foot, soccer, hand, golf...Spaulding knew rubber technology. This was before the popularity of silicon rubber. Hose, tires, tennis...flex fatigue and the delamination of rubber from fabric
was a well studied subject. Heat is how you make things with rubber and how rubber parts
are destroyed. Why would major consumers of hose move away from traditional rubber to high technology silicon formulations.
applications, wire rusts, expands and delaminates the hose internally.
It’s difficult to inspect from the exterior. Small cracks in the outside layers let water
reach the wire and failure follows. Why induce pressures on the hose lamination boundary area simply because you find it difficult or costly to get the right diameter hose. Failure caused by stretching won’t leak a little water
, it might leak a little carbon monoxide . It doesn’t take a lot to kill you.
Exhaust systems should be as strong and corrosion
resistant as possible. They should be inspected and contain few flexible sections. Lastly, a CO alarm
in every cabin
. I recall
an incident of a young woman who died from CO while taking a shower
in her yacht due to a heater
exhaust leak. No shortcuts please.
Happy trails to you.
Mark, a boatbuilding manatee