Arrangements for blanking a coupling member

An assembly including a coupling member defining a flow path, a blanking cap closing the flow path, a seal between the coupling member and the blanking cap, and a clamp, the coupling member having a first annular connection flange extending about an axis, the blanking cap comprising a disc-like member having an outer circumferential region which comprises a second annular connection flange, the first and second connection flanges overlying one another and defining corresponding opposed sealing faces between which the seal is disposed, the first and second connection flanges and seal being clamped together by means of the clamp which engages about the first and second connection flanges, wherein the blanking cap comprises a pair of safety lugs which each extend about an outer circumferential periphery of the first connection flange, each safety lug having an abutment configured for engagement with the first connection flange to limit axial movement of the disc-like member away from the coupling member, and wherein the abutments are spaced from the first connection flange when the first and second connecting flanges and seal are clamped sufficiently to form a seal.