1, API 16A Ram BOP 2, Bore dia.: 7 1/16"-26 3/4" 3. ... to the number of ram installed in each set, ram BOP can be divided into: Single ram, double ram and three ram BOP, which are respectively installed ... be divided into two forms: Rotating bonnet ram BOP and linear bonnet ram BOP. For the rotating bonnet ram BOP, when opening or closing bonnet, the ...