Pressure Testing Hose Assemblies
Be very careful pressure testing hose assemblies at high pressure, it is possible to damage the hose assembly if the test pressure is too high. Consult the manufacturer's data sheets which will show the maximum working pressure, the proof pressure and the minimum burst pressure. Parker Stratoflex hose assembly instruction say to pressure test to proof pressure after assembly.
Here are some numbers for 111 medium pressure rubber hose general purpose
Size------Work Press.-----Proof Press.-----Burst Press.
111-3-----3000-----------6000------------12000
111-6-----2000-----------4500------------9000
111-12----1500-----------3000------------6000
And some numbers for 124 teflon hose general purpose
Size------Work Press.--Burst Press.@70degF--Burst Press.@450degF
124-3----1500---------12000----------------7500
124-6----1500---------9000-----------------6500
124-12---1000---------5000-----------------3500
And the assembly instructions say proof pressure as 2x rated working pressure.
This source, which references AC43.13 among others:
http://aviationinspection.com/syste...exible-hose-assemblies-maintenance-practices/
says "Hoses should be hydraulic pressure tested at 1.5 times the maximum system pressure without leakage."
That is if a fuel system maximum pressure is 50 psi then (50 x 1.5=) 75 psi is adequate for a pressure test.