ASTM F2991-13

Standard Guide for Doubler Plate Repairs for Non-Classed Ship Structures (Withdrawn 2021)

ABSTRACT
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.
SCOPE
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.  
1.2 This guide provides owners, operators, shipyards, and designers with information for designing and using doubler plates so that the damaged structure regains its original local strength.  
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.  
1.4 The values stated in metric units (SI) are to be regarded as the standard. The values given in parentheses (inch/pound) are provided for information only.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
WITHDRAWN RATIONALE
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.
Formerly under the jurisdiction of Committee F25 on Ships and Marine Technology, this guide was withdrawn in May 2021. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

• Status: Withdrawn
• Publication Date: 31-Jan-2013
• Withdrawal Date: 04-May-2021
• ICS: 47.020.10 - Hulls and their structure elements
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.01 - Structures

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2991 − 13 An American National Standard
Standard Guide for
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Doubler Plate Repairs for Non-Classed Ship Structures
This standard is issued under the fixed designation F2991; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Documents:
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AWS D 1.1 Structural Welding Code
1.1 This guide covers information for designing permanent
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NVIC 7-68 Navigation and Vessel Inspection Circulars
steel doublers for surface ships that are not classed with any
SSC-443 Design Guidelines for Doubler Plate Repairs of
classification society, and not load line certified. It is not
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Ship Structures
intended to supersede any classification or statutory require-
ments.
3. Terminology
1.2 This guide provides owners, operators, shipyards, and
3.1 Definitions:Definitions of Symbols Specific to This
designers with information for designing and using doubler
Standard:
plates so that the damaged structure regains its original local
3.1.1 combustible liquid—liquid having flashpoint above
strength.
80°F (Grade D and E liquid).
1.3 When the steel is to be welded a welding procedure
3.1.2 corrosion—a state of deterioration in metals caused by
suitable for the grade of steel and intended use or service is to
oxidation or chemical reaction.
be utilized. See Appendix X3 of Specification A6/A6M for
3.1.3 doubler plate—a plate lap welded to damaged part of
information on weldability.
a structure to regain its original local strength.
1.4 The values stated in metric units (SI) are to be regarded
3.1.4 flammable liquid—liquidhavingflashpointatorbelow
as the standard. The values given in parentheses (inch/pound)
80°F (Grade A, B and C liquid)
are provided for information only.
3.1.5 fracture—fracture occurs when metal experiences
1.5 This standard does not purport to address all of the
stresses that exceed ultimate strength.
safety concerns, if any, associated with its use. It is the
3.1.6 tank vessels—all vessels (tank barges and tankships)
responsibility of the user of this standard to establish appro-
carrying combustible or flammable liquid cargo in bulk.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Introduction
2. Referenced Documents
4.1 The intent of this guide is to design and weld a doubler
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plate to the damaged portion of the structure so that the
2.1 ASTM Standards:
damaged structure regains its original local strength. This
A6/A6M Specification for General Requirements for Rolled
guide should be used to design a specific doubler plate for a
Structural Steel Bars, Plates, Shapes, and Sheet Piling
specific damage.
A36/A36M Specification for Carbon Structural Steel
A131/A131M Specification for Structural Steel for Ships
4.2 These guidelines are based on the study performed on
behalf of Ship Structure Committee (SSC) and are published in
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the report SSC-443.
This test method is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.01 on
Structures.
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Current edition approved Feb. 1, 2013. Published February 2013. DOI: 10.1520/ Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
F2991-13. Miami, FL 33126, http://www.aws.org.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from the United States Coast Guard (USCG) website: http://
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.uscg.mil/hq/cg5/nvic/
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Standards volume information, refer to the standard’s Document Summary page on Available from the Ship Structure Committee website: http://
the ASTM website. www.shipstructure.org/
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F2991 − 13
4.3 This guide can be used to repair damages caused by 6. Materials and Manufacture
corrosion and pitting and is applicable to all surface type steel
6.1 Doubler plate shall be of material with physical proper-
vessels. This guide does not apply to submarines and pressure
ties equal to or better than that of the parent plate.
vessels.
6.2 Steel shall conform to the requirements of Specification
4.4 Thisguidedoesnotcoverstrapsweldedtodeckandside
A36/A36M, A131/A131M, or equivalent.
shell to increase the section modulus of the vessel.
6.3 Welding shall conform to AWS D 1.1 or equivalent.
4.5 The size of doubler plate depends on the size, thickness
6.4 Proper design and controlled welding procedures shall
and location of the damaged structure
...