BS EN 6075:2017 Aerospace series. Static seal elements O-Ring ethylene- propylene, moulded, phosphate ester resistant (- 55 $0DC to 107 $0DC). Inch series

Flexible pipes
Flexible tubing
Pipes
Pipe fittings
Hose connectors
Hydraulic equipment
Fluid equipment
Aircraft components
Hydraulic tests
Pressure testing
Dynamic testing
Testing conditions
Pressure impulse tests
Test pressure
Pressure pipes

Link: BS EN 6075:2017 Aerospace series. Static seal elements O-Ring ethylene- propylene, moulded, phosphate ester resistant (- 55 {$permalink}DC to 107 {$permalink}DC). Inch series
Source: BSI Standards