- Inlet and outlet layout
- Identify the external supply function, branch count, orientation, outlet direction and approved drawing.
- Local interfaces
- Specify the exact fire-service connection and pipe-thread standards, engagement and mating parts.
- Clapper and seals
- Define internal closure arrangement, hinge/seat geometry, sealing interfaces and included subassembly parts.
- Mechanical and pressure duty
- State wall sections, connection loading, environmental finish and pressure/leak-test criteria.
- Material and release
- Identify approved casting alloy, delivery condition, batch records and complete-FDC approval responsibility.