| 摘要 |
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. The heating means ( 100 ) is provided upstream and comprises a space with heating elements ( 120 ) surrounded by insulation ( 130 ) with electrical inlets ( 122 ).
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