Historical
DIN EN 267:1999
Forced draught oil burners - Definitions, requirements, testing, marking (Foreign Standard)
The document specifies the test requirements and methods for laboratory testing of forced draught oil burners supplied with a fuel having a viscosity at the burner inlet of 1,6 mm<(hoch)2>/s (cSt) up to 6 mm<(hoch)2>/s (cSt) at 20 oC.
Deutsches Institut für Normung [din]