Stack Component Codes

The recommended component codes for designation of blowout preventer stack arrangements are as follows:

A =

annular type blowout preventer.

G =

rotating head.

R =

single ram type preventer with one set of rams, either blank or for pipe,

as operator prefers.

Rd =

double ram type preventer with two sets of rams, positioned in

accordance with operator's choice.

Rt =

triple ram type preventer with three sets of rams, positioned in

accordance with operator's choice.

S =

drilling spool with side outlet connections for choke and kill lines.

M =

1000 psi rated working pressure.

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