What is the static head pressure of a boiler operating at 275 psi?

SHP = Bpr * 2.31
                        SHP = Bpr * 2.31
                        SHP = 275 * 2.31
                        SHP = 635.25
Where,
                        SHP static head pressure
                        Bpr boiler pressure (psi)
                        2.31 multiplier