Ref. NORSOK standard C-002, pkt 7.9: it shall be possible to fit all doors with a temporary "hold open device" for use in the construction phase. Temporary "hold open devices" may be an integral part of the door closer system or a purpose made device. The temporary "hold open devicees" shal be removed prior to commissioning. Certain doors (e.g. all cabin doors) shall be fitted with permanent "hold open devices" of a type compatible with the safety philosphy, to ease cleaning in the operational phase.