A sealing arrangement (40) is provided for sealing an interface between a casing main body (12) and a casing end cover (16). A circumferential lip (42) on the casing main body (12) defines a first radially facing circumferential surface (46) and the end cover (16) has a circumferential lip (50) defining a second radially facing circumferential surface (52). The sealing arrangement (40) includes a first circumferentially extending groove (55) formed in one of the first and second circumferential surfaces (46,52) and a sealing member (56) disposed within the first groove (55) in sealing contact with the one of said first groove (55) and in sealing contact with the other one of the first and second circumferentially extending surfaces (46,52).