Fire door hinges are built-in and external.The built-in hinge is suitable for external opening, and the external hinge is suitable for internal opening.

https://ztfiredoor.com/14009.html

external fire doors for flats,fire resistant front doors for flats,fire safety doors in flats,fire rated front doors for flats,fire doors for flats,internal fire doors for flats,external fire doors for flats,industrial fire doors,fire doors for flats,fire safety doors in flats,composite fire doors for flats,external fire doors for flats,black fire doors,fire safety doors in flats,black internal fire doors,fire doors for flats