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 & satin chrome fire door hinges also 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.