ISO 24169:2022 pdf download – Ships and marine technology — Fireproof watertight hatch covers. 6.2 The cover plate, coaming and its attachments shall not have any deformation. Hatch covers shall be treated as grade Sa2½ or grade St2 and coating anti-rust primer in compliance with the requirements of ISO 8501-1. 6.3 Hatch covers shall be capable of being opened and closed easily without obstruction, and the moving parts shall be maintained in good working condition. 6.4 Fire resistance properties of hatch covers shall comply with that of an “A” class fire door in IMO Resolution MSC.307 (88)-(2010 FTP Code) Annex...