The recommended component codes adopted for designation of subsea blowout preventer stack arrangements use the same nomenclature as surface installations with the addition of remotely operated connectors:
Ch =remotely operated connector used to attach wellhead or preventers to each other (connector should have a minimum working pressure rating equal to the preventer stack working pressure rating).
Example subsea blowout preventer stack arrangements are illustrated in Figs. D.1 through D.8.
FIG D.l ARRANGEMENT CHSACL (2m rated working pressure only.)
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