Download APPENDIX 2 - EuroFormula Open

6.2.2. All fuel lines between the fuel tank and the engine must have a self-sealing
breakaway valve. This valve must separate at less than 50% of the load
required to break the fuel line fitting or to pull it out of the fuel tank.
6.2.3. No lines containing fuel, cooling water or lubricating oil may pass through
the cockpit.
6.2.4. All lines must be fitted in such a way that any leakage cannot result in the
accumulation of fluid in the cockpit.
6.2.5. No hydraulic fluid lines may have removable connectors inside the cockpit.
6.2.6. When flexible, all lines must have threaded connectors and an outer braid
which is resistant to abrasion and flame.
6.2.7. All fuel and lubricating oil lines must have a minimum burst pressure of
41bar at the maximum operating temperature of 135°C.
6.2.8. All hydraulic fluid lines which are not subjected to abrupt changes in
pressure, with the exception of lines under gravity head, must have a
minimum burst pressure of 408bar at the maximum operating temperature
of 204°C when used with steel connectors and 135°C when used with
aluminium connectors.
6.2.9. All hydraulic fluid lines subjected to abrupt changes in pressure must have a
minimum burst pressure of 816 bars at the maximum operating temperature
of 204°C.
6.3. Crushable structure
The chassis must include a crushable structure surrounding the fuel tank
with the exception of the access hatches, this structure being an integral
part of the car main structure and of the survival cell, and conforming to the
following specifications:
6.3.1. The crushable structure must be a honeycomb sandwich construction based
on a fire resistant core of a minimum crushing strength of 18N/cm²
(25lb/in²). It shall be permitted to pass water pipes through this core, but
not fuel, lubricating oil or electrical lines.
The sandwich construction must include two skins of 1.5mm thickness
having a tensile strength of minimum 225N/mm² (14 tons/in²).
6.3.2. The minimum thickness of the sandwich construction must be 1cm (10mm.).
6.4. Tank fillers
6.4.1. Tank fillers must not protrude beyond the bodywork. Any breather pipe
connecting the fuel tank to the atmosphere must be designed to avoid liquid
leakage when the car is running and its outlet must not be less than 25cm
from the cockpit opening. All tank fillers must be designed to ensure an
efficient locking action, which reduces the risk of accidental opening
following a crash impact or incomplete locking after refuelling.
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App 2 TR April 2012