1、 Guide for Building and Classing Semi- submersible Heavy Lift Vessels GUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSELS APRIL 2017 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 2017 American Bureau of Shipping. All rights reserved. ABS
2、 Plaza 16855 Northchase Drive Houston, TX 77060 USA Foreword Foreword The ABS Guide for Building and Classing Semi-submersible Heavy Lift Vessels contains requirements for vessels specially designed and equipped to load/ unload heavy deck cargoes by temporarily submerging their load lines (hence the
3、 name Semi-submersible) and thereafter transport these cargoes. During development, requirements of ABS Rules for Building and Classing Steel Vessels are considered and customized in view of the unique configurations and the typical service of Semi-submersible Heavy Lift Vessels. The applicable edit
4、ion of the ABS Rules for Building and Classing Steel Vessels is to be used in association with this Guide. This Guide 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 of this Guide is
5、the most current. We welcome your feedback. Comments or suggestions can be sent electronically by email to rsdeagle.org. ii ABSGUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSELS .2017 Table of Contents GUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSELS CONTENTS SECT
6、ION 1 General 1 1 Application 1 3 Classification . 1 3.1 General 1 3.3 Semi-submersible Heavy Lift Vessel Operational and Transit Limits . 1 5 Scope 2 7 Administration Approval 2 9 Submission of Plans . 2 11 Operations Manual 3 13 Definitions . 3 SECTION 2 Stability and Load Line 4 1 Load Line 4 3 S
7、tability 4 3.1 Intact and Damage Stability during Transit Condition 4 3.3 Stability during Submerged Condition . 4 3.5 Reserve Buoyancy 5 SECTION 3 Construction . 6 1 General . 6 1.1 Longitudinal Strength 6 1.3 Finite Element Analysis . 7 1.5 Bending Moments and Shear Forces 7 1.7 Loading Manual, Lo
8、ading Instrument, and Operation Manual . 7 1.9 Transverse Strength 7 1.11 Bulwarks/Guard Rails 7 1.13 Strengthening for Heavy Deck Cargoes 8 3 Local Strength . 8 3.1 Structure under the Keel and Side Blocks . 8 3.3 Connection of buoyancy towers 9 5 Welding . 9 ABSGUIDE FOR BUILDING AND CLASSING SEMI
9、-SUBMERSIBLE HEAVY LIFT VESSELS .2017 iii 7 Additional Requirements . 9 7.1 Arrangement of Fuel Oil Tanks 9 7.3 Access and Crew Protection 9 7.5 Deck Modification 9 FIGURE 1 Critical Area . 7 FIGURE 2 Support in Dry Dock 8 SECTION 4 Vessel Systems and Machinery 10 1 General . 10 3 Propeller and Rudd
10、er Seals 10 5 Ballast System 10 5.1 General 10 5.3 Submerging and Emerging System . 10 7 Tank Vents 11 9 Piping 11 9.1 Damage . 11 9.3 Open Ended Piping Systems . 11 11 Control System for Flooding and Dewatering . 11 13 Interior Communication Systems 12 15 Bulkhead Cable and Piping Penetrations . 12
11、 SECTION 5 Fire Safety and Lifesaving Appliances . 13 1 General . 13 3 Hazardous Areas 13 5 Fire-Fighting Equipment on Cargo Deck 13 7 Lifesaving Appliances . 13 7.1 Requirements for Lifesaving Appliances 13 7.3 Buoyancy Towers 13 SECTION 6 Surveys . 14 1 Surveys During Construction 14 1.1 Hull Cons
12、truction . 14 1.3 Hull Construction Welding and Fabrication 14 1.5 Hull Castings and Forgings 14 1.7 Hull Piping . 14 1.9 Sea Trial 14 3 Surveys After Construction . 14 SECTION 7 Navigation . 15 1 Navigation Bridge Visibility 15 iv ABSGUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSE
13、LS .2017 Section 1: General SECTION 1 General This Guide has been developed to support the Class Notation Semi-Submersible Heavy Lift Vessel, hereinafter referred to as Heavy Lift Vessel. Vessels intended for loading or unloading deck cargo by temporarily submerging the cargo deck by ballast operati
14、ons will be eligible for this notation. These vessels are primarily used as an alternative to towing for the transportation of large drilling rigs and other marine or offshore structures. The vessels may also be used for transportation of damaged vessels that cannot transit to repair facilities on t
15、heir own power. Typically, a float-on/float-off method is used to load and unload these cargoes when the vessels cargo deck is in the submerged condition. 1 Application In general, ABS considers semi-submersible heavy lift vessels to be cargo ships, and these vessels are to comply with the ABS Rules
16、 for Building and Classing Steel Vessels (Steel Vessel Rules) in their entirety, except as modified herein. The additional requirements specified in this Guide are intended to account for the unique configuration and operational service profiles of these vessels. In addition, due to the method of lo
17、ading and unloading of deck cargo that is employed, ABS Rules for Building and Classing Steel Floating Dry Docks (Dry Dock Rules) will also be applied, as applicable, and referenced within this Guide. Semi-submersible heavy lift vessels are to comply with the requirements of this Guide. ABS may cons
18、ider the flag Administrations published regulations for heavy lift vessels as an alternative to satisfying specific portions of this Guide. 3 Classification A list of classification symbols and notations available to the Owner of vessels, offshore drilling and production units and other marine struc
19、tures and systems is included in the document. Entitled “List of ABS Notations and Symbols”, it is available on the ABS website http:/www.eagle.org. The following notation is specific to semi-submersible heavy lift vessels. 3.1 General In accordance with Section 1-1-3 of the ABS Rules for Conditions
20、 of Classification (Part 1), the classification A1 Semi-Submersible Heavy Lift Vessel will be assigned to vessels designed for loading or unloading of deck cargo by temporarily submerging their cargo deck by means of ballast operations and built to the requirements of this Guide and other applicable
21、 sections of the Steel Vessel Rules. 3.3 Semi-submersible Heavy Lift Vessel Operational and Transit Limits 3.3.1 General The Semi-submersible Heavy Lift Vessels Operational Limits are to be included in the vessels Operation Manual. 3.3.2 Special Consideration of Operational Limits Any specific opera
22、tional restrictions and safety requirements required by the flag Administration and/or Coastal State are to be specially considered and are to be documented in the vessels Operation Manual. ABSGUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSELS .2017 1 Section 1 General 3.3.3 Special
23、 Consideration of Transit Limits If specific environmental data for the transit route is unavailable, the vessel is considered for unrestricted service. Transit limits are to be considered based on cargo specifications on a case-by-case basis. 5 Scope This Guide is intended to cover the hull constru
24、ction, machinery, and safety requirements to class a semi-submersible heavy lift vessel. 7 Administration Approval In general, the approval of materials for use in accommodation, safety equipment, lifesaving appliances, etc., is a function of the Administration. When given specific authorization by
25、the Administration, ABS may approve and accept materials, equipment, lifesaving appliances, etc., fitted on the vessel. See Section 5 for specific requirements for the lifesaving arrangements. 9 Submission of Plans Plans showing the scantlings, arrangements and details of the principal parts of the
26、structure to be built under survey are to be submitted for review or approval prior to commencement of construction. These plans are to clearly indicate the scantlings, joint details and welding, or other methods of connection. Plans from designers and builders should generally be submitted electron
27、ically to ABS. However, hard copies will also be accepted. All plan submissions originating from manufacturers are understood to have been made with the cognizance of the builder. In general, these plans are to include the items specified in 1-1-7/1 of the ABS Rules for Conditions of Classification
28、(Part 1) and the following, where applicable. General arrangement plan Operation manual Transverse section scantlings at midlength of the vessel Structural plans of the buoyancy towers Structural plans of the decks and bulkheads Tank arrangements showing also maximum service heads and heights of ove
29、rflows and vent pipes and, where used in design, data showing the maximum differential service head Pumping arrangements Machinery and electrical plans Piping systems Ballast operating procedure/manual Fire extinguishing systems Stability calculations and hydrostatic curves Stability manual specifyi
30、ng the allowable maximum height of the center of gravity in relation to draft data or other parameters that complies with the intact and damage stability criteria. Calculations and data for longitudinal strength analysis 2 ABSGUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSELS .2017
31、Section 1 General Hydrostatics calculation program, including calculation of deflection Particulars of deflection indicating system Deck load diagram, including uniform design load kN/m2(kgf/m2, lbf/ft2) of cargo deck Design load kN/m (kgf/m, lbf/ft) on centerline (approximating the design ship weig
32、ht distribution) Maximum keel block and bilge block loads Bulkhead cable and piping penetrations Hazardous area and lifesaving appliances 11 Operations Manual The operations manual is to be kept onboard the vessel and is to include the following information: The environmental (sea state) retrictions
33、 and operational restrictions (i.e., draft restrictions, trim and list restrictions, deck loading restrictions, liquid load restrictions etc.) for all possible operational modes such as transit, float-on/float-off, and submerged condition etc. The maximum submerged draft ballasting procedure which i
34、ncludes a sequence of loading conditions and operational limits. Loading conditions for all possible operational modes, such as transit condition, float on/float off operation, submerged condition, etc. Sea fastenings to properly secure cargo to withstand loads caused by static loads due to gravity,
35、 heel, and trim of the vessel and dynamic loads due to vessel motions and wind loads. General operating procedures for the ballast system including information about ballast system equipment and ballast system operating restrictions. Ballasting/de-ballasting sequences for float on/float off operatio
36、ns, including pumping sequences, are also to be provided. The conditions included in the operations manual related to float on/float off operations are to be provided for reference only. For every float on/float off operation, additional detailed analysis of ballast sequencing considering the cargo
37、properties and sea conditions for this operation is to be performed. The operations manual is to be submitted for review by ABS to verify the presence of the above information, which is to be consistent with the design information and limitations considered in the vessels classification. ABS is not
38、responsible for the operation of the vessel. 13 Definitions Cargo Deck. The deck to be submerged for loading/unloading the cargo. Centering Station. A location where the emergency power source or main navigation equipment are fitted, with monitoring devices, as appropriately, for purpose of effectin
39、g desired operation of specific machinery. Maximum Submerged Fore and Aft Drafts. The maximum drafts at the forward and aft ends to which the ship is permitted to be submerged. Safety Deck. The deck on which the crew or passengers are to be safely accessible at all time. The safety deck is not to be
40、 submerged during loading/unloading the cargo. Safety Deck Substation. A subsidiary facility equipped with equipment and personnel for a particular purpose of safety deck. Semi-submersible Heavy Lift Vessel. Semi-submersible Heavy Lift Vessels are special transport ships that are designed to ballast
41、 down and temporarily submerge their cargo decks for loading/offloading floating cargo. Submerged Condition. The ballast operation with load line mark submerged. Transit Condition. The loaded voyage of the vessel when it is loaded. ABSGUIDE FOR BUILDING AND CLASSING SEMI-SUBMERSIBLE HEAVY LIFT VESSE
42、LS .2017 3 Section 2: Stability and Load Line SECTION 2 Stability and Load Line 1 Load Line Semi-submersible Heavy Lift Vessels may submerge their load lines during cargo operations to the extent permitted by its approved operation manual (draft, list and trim limits, limiting sea and weather condit
43、ions, etc.). The voyage, however, is to be in accordance with its load line marks. The flag Administration may require the issuance of an International Convention on Load Lines (ICLL) Exemption Certificate to a Semi-submersible Heavy Lift Vessel due to the need to immerse the load line marks during
44、cargo loading/unloading. The relevant flag Administration is to be consulted for operation manual in this regard. In all cases, adequate loading and stability information is to be available to the Master, and cargo operations are to be conducted within any separately defined wind/wave limitations. 3
45、 Stability 3.1 Intact and Damage Stability during Transit Condition 3.1.1 Intact Stability Each Semi-submersible Heavy Lift Vessel is to comply with the intact stability requirements of either: i) The International Code on Intact Stability (2008 IS Code) ii) Published standard from an organization r
46、ecognized by ABS as being acceptable 3.1.2 Damage Stability Each Semi-submersible Heavy Lift Vessel is to comply with the damage stability requirements of either: i) SOLAS Ch. II-1 or International Convention on Load Lines 1966 Reg. 27 (including IACS UI LL65, as applicable) ii) Published standard f
47、rom an organization recognized by ABS as being acceptable 3.1.3 Cargo Buoyancy Upon approval by ABS on a case-by-case basis, the buoyancy provided by the cargo may be taken into account in the intact and damage stability calculations in 2/3.1.1 and 2/3.1.2. Under the damage stability calculations in
48、 2/3.1.2, the transverse damage extents are to be taken from the ships side and be applied to the ship and cargo. Where the cargo overhangs the vessels side, additional damage cases should assume the transverse damage extent is taken from the cargo boundary. 3.3 Stability during Submerged Condition
49、Semi-submersible Heavy Lift Vessels are to meet the following stability standards during cargo loading and unloading operations that submerge the load line marks. 3.3.1 Watertight Integrity During the submersion procedure, the lower edge of non-watertight openings is to have a distance above the final waterline of 1.0 meter (3.28 feet) or a distance corresponding to a heel angle of five degrees, whichever is greater. Openings which may become immersed during the submersion procedure are to have watertight closing appliances. The
