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GB/T 47273-2026Specification for the floatover design and operation of offshore topsides (English PDF)

海上组块浮托安装的设计与施工规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 31, 2026

Implementation date

July 1, 2026

Scope

GB/T 47273-2026 is the English-translated version of 海上组块浮托安装的设计与施工规范.

GB/T 47273-2026 is the Chinese standard "Specification for the floatover design and operation of offshore topsides".

Its scope clause reads: This document specifies the general design requirements for offshore modular floating installation, the design for floating installation on non-powered barges, and the design for floating installation on dynamically positioned vessels.

Requirements related to equipment design, model testing, virtual simulation, floating installation monitoring, and offshore construction. This document applies to the design and construction of offshore modular floating installations; it can be used as a reference for floating removal. Its clauses include terms and definitions.

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Document preview — GB/T 47273-2026

National Standard of the People's Republic of China

ICS: 75.180.10
Classification: E 94

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Abbreviations
5.General Requirements for Floating Installation Design
5.1 General Rules
5.2 Loading
5.3 Towing
5.4 Standby
5.5 Advancing and Retreating the Ship
5.6 Docking
6.1 Ship loading design
6.2 Towing Design
6.3 Standby Design
6.4 Forward and Reverse Ship Design
6.5 Dock Design
7.Design of Floating Installation for Dynamically Positioned Vessels
7.1 General Requirements
7.2 Shipboard Design
7.3 Flight Design
7.4 Standby Design
7.5 Advance and Retreat Design
7.6 Dock Design
8 Model Experiment
8.1 Scale ratio
8.2 Environmental Condition Simulation
8.3 Model Making
8.4 Test Condition
9 Virtual Simulation
9.1 General Requirements
9.2 Standby Operation
9.3 Ship Entry Operation
9.4 Docking Operation
9.5 Ship withdrawal operation
9.6 Emergency Response
10 Float installation monitoring and offshore construction
10.1 Monitoring of Float Installation
10.2 Offshore Construction

1 Scope

This document specifies the general design requirements for offshore modular floating installation, the design for floating installation on non-powered barges, and the design for floating installation on dynamically positioned vessels.

Requirements related to equipment design, model testing, virtual simulation, floating installation monitoring, and offshore construction.

This document applies to the design and construction of offshore modular floating installations; it can be used as a reference for floating removal.

2 Normative references

This document has no normative references.

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Floatover

By adjusting the ballast water volume of the tidal vessel and utilizing tidal changes, the height of the superstructure is adjusted, placing the superstructure on top of the lower support structure.

One type of installation method for the part.

3.2 Substructure

Fixed to the seabed or floating on the sea surface, it is used to support the upper module of the platform.

3.3 Substructure slot of the lower support structure

The space between the legs of the lower support structure is used for the entry and exit of floating vessels.

3.4 Deck support frame (DSF)

A structure located between the superstructure and the hull, used to support the superstructure and distribute the load of the superstructure to the hull.

3.5 Deck separation unit (DSU)

Installed on the upper part of the upper module support structure, it is used to buffer the separation of the upper module from the floating vessel.

A device for inter-collision force.

3.6 Leg mating unit (LMU)

Installed on the upper end of the legs of the lower support structure or the lower end of the legs of the upper module, it is used to buffer the upper module when it docks with the lower support structure.

A device for controlling the collision force between the block and the lower supporting structure.

3.7 swayfender

Located between the two sides of the trolley and the substructure, it consists of a fixed structure and rubber fenders, and is used to buffer the impact between the trolley and the substructure.

Fenders that support the lateral collision force between supporting structures.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.

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