Requirements for Application of Higher-Strength Hull Structural Thick Steel Plates in Container Carriers
Year: 2024 Language: English Author: American Bureau of Shipping(ABS) Edition: July,2024 Format: PDF Quality: eBook Pages count: 119 Description: Over the last several decades, the drive for increasingly efficient sea-borne container transportation has led to significant growth in the size of container carriers. Application of hull structural thick steel plates in the upper flange of large container carriers is a natural choice for the hull structure to meet the required hull girder strength. Steel plates well in excess of 50 mm (2 in.) in thickness are commonly found in large container carriers. More recently, one significant technical innovation on the next generation of container carriers is the application of hull structural thick steel plates with a minimum yield stress of 460 N/mm2 (47 kgf/mm2, 67 ksi) (H47), as well as the application of brittle crack arrest steel. Higher-strength thick steel plates have been designed and applied to upper deck region* longitudinal structural members including the topmost strakes of the inner hull or bulkhead, the sheer strake, main deck, hatch coaming side plate, coaming top plate, and all attached longitudinal stiffeners. Note: *The upper deck region is defined as the upper deck plating, hatch side coaming plating, hatch coaming top plating, and their attached longitudinals. In addition to the ABS Rules for Building and Classing Marine Vessels (Marine Vessel Rules), this document provides supplementary requirements for the application of higher-strength hull structural thick steel plates, greater than 50 mm (2 in.), in large container carriers. For thick steel plates with a minimum yield stress of 390 N/mm2 (40 kgf /mm2, 57 ksi) (H40), the requirements reflect a large and successful body of experience with large container carriers in service, considering the first principles structural analysis methodologies and the experience in material, welding, and construction routinely applied to large container carriers. Also, in response to requests from industry for the adoption of H47 steel grade and brittle crack arrest steel, this document provides guidance on the design, construction and operation, of container carriers built with such high strength steel. This document provides the requirements for the optional notation, EBCAD (Enhanced Brittle Crack Arrest Design), for the enhanced BCA application of higher-strength hull structural thick steel plates in container carriers. The January 2021 edition also updated the requirements for H47 steel and brittle crack arrest steel and introduced a new Appendix 8 on engineering critical assessment for hatch coamings. The February 2021 edition aligned the long-term distribution factor in A1/5.5 with the Marine Vessel Rules. The March 2022 edition aligns the wave bending moment in A2/3 with 5C-5-A4a/3.5.2 of the Marine Vessel Rules. This March 2023 edition introduces optional notations WIP and SPR, which denote that the strength and fatigue performance of the hull structure is evaluated considering the effects due to whipping and springing, respectively. The July 2024 version changes the document type from “Guide” to “Requirements”. “Requirements”documents contain mandatory criteria for Classification and issuance of Class Certificates, while Guides contain only requirements for optional Notations (see 1A-1-4/1.5 of the ABS Rules for Conditions of Classification (Part 1A)). Accordingly, editorial changes are made throughout this document. The July 2024 version also introduces Goal Based Standards to enable the verification of alternative arrangements, new technologies, and novel concepts. It incorporates the latest updates to IACS UR W31. It also includes updates to improve clarity. This document becomes effective on the first day of the month of publication. Users are advised to check periodically on the ABS website www.eagle.org to verify that this version is the most current.
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Requirements for Application of Higher-Strength Hull Structural Thick Steel Plates in Container Carriers
Language: English
Author: American Bureau of Shipping(ABS)
Edition: July,2024
Format: PDF
Quality: eBook
Pages count: 119
Description: Over the last several decades, the drive for increasingly efficient sea-borne container transportation has led to significant growth in the size of container carriers. Application of hull structural thick steel plates in the upper flange of large container carriers is a natural choice for the hull structure to meet the required hull girder strength. Steel plates well in excess of 50 mm (2 in.) in thickness are commonly found in large container carriers. More recently, one significant technical innovation on the next generation of container carriers is the application of hull structural thick steel plates with a minimum yield stress of 460 N/mm2 (47 kgf/mm2, 67 ksi) (H47), as well as the application of brittle crack arrest steel. Higher-strength thick steel plates have been designed and applied to upper deck region* longitudinal structural members including the topmost strakes of the inner hull or bulkhead, the sheer strake, main deck, hatch coaming side plate, coaming top plate, and all attached longitudinal stiffeners.
Note: *The upper deck region is defined as the upper deck plating, hatch side coaming plating, hatch coaming top plating, and their attached longitudinals.
In addition to the ABS Rules for Building and Classing Marine Vessels (Marine Vessel Rules), this document provides supplementary requirements for the application of higher-strength hull structural thick steel plates, greater than 50 mm (2 in.), in large container carriers. For thick steel plates with a minimum yield stress of 390 N/mm2 (40 kgf /mm2, 57 ksi) (H40), the requirements reflect a large and successful body of experience with large container carriers in service, considering the first principles structural analysis methodologies and the experience in material, welding, and construction routinely applied to large container carriers. Also, in response to requests from industry for the adoption of H47 steel grade and brittle crack arrest steel, this document provides guidance on the design, construction and operation, of container carriers built with such high strength steel.
This document provides the requirements for the optional notation, EBCAD (Enhanced Brittle Crack Arrest Design), for the enhanced BCA application of higher-strength hull structural thick steel plates in container carriers.
The January 2021 edition also updated the requirements for H47 steel and brittle crack arrest steel and introduced a new Appendix 8 on engineering critical assessment for hatch coamings.
The February 2021 edition aligned the long-term distribution factor in A1/5.5 with the Marine Vessel Rules.
The March 2022 edition aligns the wave bending moment in A2/3 with 5C-5-A4a/3.5.2 of the Marine Vessel Rules.
This March 2023 edition introduces optional notations WIP and SPR, which denote that the strength and fatigue performance of the hull structure is evaluated considering the effects due to whipping and springing, respectively.
The July 2024 version changes the document type from “Guide” to “Requirements”. “Requirements”documents contain mandatory criteria for Classification and issuance of Class Certificates, while Guides contain only requirements for optional Notations (see 1A-1-4/1.5 of the ABS Rules for Conditions of Classification (Part 1A)). Accordingly, editorial changes are made throughout this document.
The July 2024 version also introduces Goal Based Standards to enable the verification of alternative arrangements, new technologies, and novel concepts. It incorporates the latest updates to IACS UR W31. It also includes updates to improve clarity.
This document becomes effective on the first day of the month of publication.
Users are advised to check periodically on the ABS website www.eagle.org to verify that this version is the most current.
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