Fire door hinges 4 inch, 100mm, 102mm from uk door handles. We have a large selection of graded fire door hinges from standard pin to ball bearing. BS. EN1935.2002. British Standards. CE Marked. Grade 7. Grade 11 and grade 13. We have polished chrome fire door hinges. Polished brass fire door hinges. Ball Bearing Hinges. A fire door hinge is rated by British standards to withstand heat for a period of time, making the door safe if the worst should happen.