Abstract: A device (10) for isolating a surface for welding in an underwater location or in high fire risk areas. The device comprises a housing (27) which is arranged to be mounted on the surface and a sealing means (30) to provide a seal between the housing and the surface. The housing (27) is provided with a sealed inlet (50) for receiving a welding apparatus, a fluid inlet (32) for the passage of gas into the housing, and a fluid outlet (34) for the passage of gas and/or liquid out of the housing. A heating means FIG. 3 is not figure) for providing heated gas to the fluid inlet is also provided. In use, an ingress of heated gas through the fluid inlet (32) facilitates an egress of gas and/or liquid, contained in a space defined by the housing and the surface, through the fluid outlet (34) in the housing. In this way an in situ dry gaseous environment is provided for welding the surface.

Abstract: A device (10) for isolating a surface for welding in an underwater location or in high fire risk areas. The device comprises a housing (27) which is arranged to be mounted on the surface and a sealing means (30) to provide a seal between the housing and the surface. The housing (27) is provided with a sealed inlet (50) for receiving a welding apparatus, a fluid inlet (32) for the passage of gas into the housing, and a fluid outlet (34) for the passage of gas and/or liquid out of the housing. A heating means FIG. 3 is not figure) for providing heated gas to the fluid inlet is also provided. In use, an ingress of heated gas through the fluid inlet (32) facilitates an egress of gas and/or liquid, contained in a space defined by the housing and the surface, through the fluid outlet (34) in the housing. In this way an in situ dry gaseous environment is provided for welding the surface.