ISO 24169:2022 pdf – Ships and marine technology — Fireproof watertight hatch covers.
1 Scope This document specifies the classification, flagging, requirements, test methods, inspection rules, markings, packaging, transportation and storage of fireproof watertight hatch covers installed on decks (hereafter referred to as “hatch covers”). This document applies to the design, manufacture and acceptance of fireproof watertight hatch covers installed on decks of ships where anticipated water pressure by wave is up to 10 m. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings IEC 60529, Degrees of Protection provided by enclosures (IP Code) IMO International Convention for the Safety of Life at Sea (SOLAS), 1974, and its Protocol of 1988, as amended IMO International Code for Application of Fire Test Procedures, 2010 (2010 FTP Code), Resolution 307(88), as amended 3? Terms? and? definitions No terms and definitions are listed in this document. ISO and IEC maintain terminology databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at https:// www .electropedia .org/ 4? Classification? and? designation 4.1 Types 4.1.1 Based on their shape, watertight hatch covers shall be classified into the two following types: — A-type (round hatch cover); — B-type (square or rectangular hatch cover). 4.1.2 According to the fire-protection rating, watertight hatch covers shall be classified into three levels: A-60, A-30, and A-0.
4.2.3 Fireproof watertight hatch covers conforming to this document shall be designated as follows, in the order given: a) type: hatch cover B or hatch cover A; b) nominal size; c) thickness of the cover plate; d) thickness of coaming; e) height of coaming. EXAMPLE The designation of a B-type hatch cover with nominal size 830 mm × 830 mm × 100 mm, thickness of the cover plate 8 mm, thickness of coaming 8 mm and height of coaming 250 mm is: Hatch cover B 830×830×8-8×250 5 Materials 5.1 The cover plate and coaming shall be manufactured from shipbuilding steel with a minimum tensile strength of *340 N/mm 2 , or from materials with an equivalent strength. 5.2 The hinge shall be manufactured from materials with a minimum tensile strength of *340 N/ mm 2 . 5.3 Opening devices and hinge pins shall be manufactured from materials with a minimum tensile strength of *350 N/mm 2 . 5.4 For ships adhering to the rules of a classification society, the material marked with ( * ) shall conform to the requirements of the society. 5.5 Fireproof materials shall be suitable for the marine environment, and shall meet the fire- protection rating requirements in accordance with SOLAS and the IMO FTP Code. 6 Quality of manufacture 6.1 The surface of hatch covers shall be free from burrs, sharp edges, scratches, press marks and other defects, and the welded seam shall be smooth and free from cavities, cracks, slag entrapments, undercuts, incomplete fusion and other defects.
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 1, Part 3, as amended. In addition, the maximum temperature rise measured along the hatch coaming shall not exceed 180 °C for the required test duration. The fire testing and instrumentation requirements for hatch covers shall be in accordance with 7.2 of this document. 6.5 Hatch covers shall have no leakage under a water pressure of 0,1 MPa. 7 Test 7.1 Operate the hatch cover by opening and closing it twice in a row, to check the agility of the opening device and the hinge. The requirements in 6.3 shall be met. 7.2 Fire resistance properties of hatch covers shall be verified generally in accordance with the fire testing and instrumentation requirements of an “A” class fire door in IMO Res. MSC.307 (88)-(2010 FTP Code) Annex 1, Part 3, Appendix 1, paragraphs 2.3 and 7.6.3 respectively and additional requirements specified in 7.2.1. to 7.2.2 of this document. The result shall meet the requirements in 6.4 of this document. 7.2.1 As higher temperatures may be expected along the hatch coaming, additional thermocouples shall be placed directly on the hatch coaming 25 mm from the fire unexposed surface of the cover plate, provided that the thermocouples are at least 100 mm away from the gap between the edge of the hatch leaf and frame.