Active Standard ASTM F2991 | Developed by Subcommittee: F25.01
Book of Standards Volume: 01.07
This guide provides information for designing permanent steel doublers used in surface ships that are not classed with any classification society and not load line certified. It describes the requirements for designing and welding a doubler plate to the damaged portion of the structure so that the damaged structure regains its original local strength. For the welding of steel, the guide prescribes a welding procedure suitable for the grade of steel and intended use or service. The standard covers the applicability of doubler plates, materials and their manufacture, dimensions, workmanship, finish, appearance, and inspection.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This guide covers information for designing permanent steel doublers for surface ships that are not classed with any classification society, and not load line certified. It is not intended to supersede any classification or statutory requirements.
1.3 When the steel is to be welded a welding procedure suitable for the grade of steel and intended use or service is to be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.
ICS Number Code 47.020.10 (Hulls and their structure elements)