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BS EN ISO 19901-3:2024

BS EN ISO 19901-3:2024

$215.11

Oil and gas industries including lower carbon energy. Specific requirements for offshore structures – Topsides structure

Published By Publication Date Number of Pages
BSI 2024 164
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This document provides requirements, guidance and information for the design and fabrication of topsides structure for offshore structures, including in-service, pre-service and post-service conditions. The actions on topsides structure and the action effects in structural components are derived from this document, where necessary in combination with other International Standards in the ISO 19901 series (e.g. ISO 19901-1 for wind actions – see 7.6.2, ISO 19901-2 for seismic actions – see 7.7) and ISO 19902 for fatigue design (see 6.7). This document is applicable to the following: —     topsides of fixed offshore structures; —     discrete structural units placed on the hull structures of floating offshore structures and mobile offshore units; —     topsides of arctic offshore structures, excluding winterization (see ISO 19906). If any part of the topsides structure forms part of the primary structure of the overall structural system which resists global platform actions, the requirements of this document are supplemented with applicable requirements in ISO 19902, ISO 19903, ISO 19904-1, ISO 19905-1, ISO 19905-3 and ISO 19906. For those parts of floating offshore structures and mobile offshore units that are chosen to be governed by the rules of a recognized classification society, the corresponding class rules supersede the associated requirements of this document. This document also addresses prevention, control and assessment of fire, explosions and other accidental events. The fire and explosion provisions of this document can be applied to those parts of the hulls of floating structures and mobile offshore units that contain hydrocarbon processing, piping or storage. NOTE          Requirements for structural integrity management are presented in ISO 19901-9. This document applies to structural components including the following: —     primary and secondary structure in decks, module support frames and modules; —     flare structures; —      crane pedestal and other crane support arrangements; —     helicopter landing decks (helidecks); —     permanent bridges between separate offshore structures; —     masts, towers and booms on offshore structures. This document provides requirements for selecting and using a national building standard with a correspondence factor for determining the resistance of rolled and welded non-circular prismatic components and their connections.

PDF Catalog

PDF Pages PDF Title
2 undefined
17 4.1 Symbols
18 4.2 Abbreviated terms
19 5.1 Conceptual design
5.2 Codes and standards
5.2.1 Limit states and allowable stress philosophies
20 5.2.2 Use of national building standards
5.3 Deck elevation
5.4 Exposure level
21 5.5 Operational requirements
5.5.1 Functional requirements
5.5.2 Spillage and containment
5.6 Design physical environmental conditions
5.7 Critical structure
22 5.8 Assessment of existing topsides structure
5.9 Reuse of topsides structure
5.10 Repairs, modifications and refurbishment
23 6.1 General
6.2 Design/assessment situations
6.3 Material selection
6.4 Structural interfaces
6.5 Design for serviceability
6.5.1 Serviceability limits
24 6.5.2 Vibrations
25 6.5.3 Deflections
26 6.6 Design for strength
6.7 Design for fatigue
6.8 Robustness
6.8.1 General
6.8.2 Ductility
27 6.9 Confirmation of execution of design requirements
6.10 Corrosion control
28 6.11 Design for fabrication and inspection
6.12 Design for loadout, transportation and installation
29 6.13 Design for structural integrity management
6.14 Design for decommissioning, removal and disposal
6.14.1 General
6.14.2 Structural releases
6.14.3 Lifting appurtenances
6.14.4 Heavy lift and set-down operations
30 7.1 General
31 7.2 In-service actions
32 7.3 Action factors
7.3.1 Design actions for operational design/assessment situations in still water
7.3.2 Design actions for operational design/assessment situations with operating environmental actions
33 7.3.3 Design actions for extreme design/assessment situations
7.4 Vortex-induced vibrations
7.5 Indirect actions and resulting forces (action effects)
34 7.6 Metocean and ice actions
7.6.1 Wave, current and ice actions
35 7.6.2 Wind actions
36 7.6.3 Cold regions effects
7.7 Seismic actions
7.7.1 General
7.7.2 Minimum lateral acceleration
7.7.3 Equipment and appurtenances
37 7.8 Actions during fabrication, loadout, transportation, and installation
7.9 Actions arising from accidental events
7.9.1 General
39 7.9.2 Structural design for fire hazard
40 7.9.3 Structural design for explosion hazard
44 7.9.4 Explosion and fire interaction
45 7.9.5 Cryogenic spill
7.9.6 Actions due to vessel collision
7.9.7 Actions due to dropped and swinging objects and projectiles
7.9.8 Actions due to loss of buoyancy
46 7.9.9 Actions due to topsides acceleration
7.10 Other actions
7.10.1 Drilling
47 7.10.2 Conductors
48 7.10.3 Risers
7.10.4 Caissons
7.10.5 Maintenance, mechanical handling and lifting aids
7.10.6 Bridge supports
49 8.1 Correspondence factor 
8.2 Design of cylindrical tubular sections
8.3 Design of non-cylindrical sections
8.3.1 Rolled and welded non-circular prismatic members
50 8.3.2 Plate girder
8.3.3 Box girder
8.3.4 Stiffened plate components and stressed skin structures
51 8.4 Connections
8.4.1 General
8.4.2 Restraint and shrinkage
8.4.3 Bolted connections
55 8.5 Castings and forgings
8.6 Design for structural stability
56 9.1 Limit state verification approach
57 9.2 Limit state verification for fire and explosion events
9.3 Approaches for limit state verification for fire and explosion events
58 9.4 Risk and risk targets
60 9.5 Limit state verification for fire and explosion events by semi-probabilistic approach
9.5.1 DL limit state verification
9.5.2 NC limit state verification
61 9.5.3 Representative values of accidental actions
10.1 Topsides design
10.1.1 General
10.1.2 Topsides on concrete substructures
62 10.1.3 Topsides on floating structures
10.1.4 Equipment supports
10.2 Topsides structure design models
10.2.1 General
63 10.2.2 Substructure model for topsides design
10.2.3 Topsides model for topsides design
64 10.2.4 Modelling for design of equipment and piping supports
10.3 Substructure interface
10.3.1 Responsibility
10.3.2 Strength design
10.3.3 Fatigue design
10.4 Flare towers, booms, vents and similar structure
65 10.5 Helicopter landing facilities (helidecks)
10.5.1 General
66 10.5.2 Construction
10.5.3 Helideck design verification
70 10.5.4 Reassessment of existing helidecks
71 10.6 Crane support structure and crane boom rest
10.6.1 General
10.6.2 Design requirements
72 10.6.3 Static design
74 10.6.4 Fatigue design
75 10.6.5 Seismic/Earthquake design
10.6.6 Dynamic design
76 10.6.7 Fabrication
10.6.8 Crane boom rest design
10.7 Derrick equipment set
77 10.8 Bridges
10.9 Bridge bearings
78 10.10 Anti-vibration mountings for modules and major equipment skids
10.11 System interface assumptions
10.12 Fire protection systems
79 10.13 Penetrations
10.14 Difficult-to-inspect areas
10.15 Drainage
10.16 Strength reduction due to heat
10.17 Walkways, laydown areas and equipment maintenance
80 10.18 Muster areas and lifeboat stations
11.1 General
81 11.2 Carbon steel
86 11.3 Stainless steel
11.3.1 General
11.3.2 Types of stainless steel
87 11.3.3 Material properties
11.4 Aluminium alloys
11.4.1 General
11.4.2 Types of aluminium
11.4.3 Material properties
88 11.4.4 Thermite sparking
11.5 Fibre-reinforced polymers (FRP)
11.6 Timber
89 12.1 Assembly
12.1.1 General
12.1.2 Grating
12.1.3 Landing and stairways
12.1.4 Temporary attachments
12.2 Welding
90 12.3 Fabrication inspection
12.4 Quality control, quality assurance and documentation
12.5 Corrosion protection
12.5.1 Coatings
12.5.2 Under deck areas
12.5.3 Dissimilar materials
91 12.6 In-service inspection, monitoring and maintenance of corrosion control
14.1 General
14.2 Requirements applying to topsides structures
14.2.1 Corrosion protection systems
14.2.2 Critical structures
14.2.3 Control of hot work (e.g. welding and cutting)
92 14.2.4 Accidental events and incidents
14.2.5 Change control

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BS EN ISO 19901-3:2024
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