Clasification Society Provisional Rules - Provisional Rules for the Construction and Classification of Submarine Pipelines, January 2008 - Chapter 1 Provisional Rules for the Construction and Classification of Submarine Pipelines - Section 6 General
Section 6 General
6.1 Emergency shutdown
6.1.1 To limit the quantity of flammable or toxic substances escaping in the event of damage to a riser, consideration is to be given, particularly on risers attached to manned installations, to the fitting of emergency shutdown valve(s). The valve(s) and their control mechanisms should be positioned to offer the maximum protection to the installation in the event of damage.
6.2 Riser attachments and siting
6.2.1 Riser supports attached to a fixed installation are to be designed using the same extreme storm conditions and fatigue requirements adopted for the installation in question.
6.2.2 Where practicable, risers are to be protected from damage by either siting them within the installation structure, or by providing adequate fendering.
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