| 摘要 |
A method and apparatus for collecting samples from wall surfaces within tanks such as industrial storage tanks, ships, cargo tanks and road tankers, for the purpose of testing any contaminent to assess suitability for filling. The method comprises directing a pressurized jet or spray of liquid washing medium on to a selected region of a surface of a wall within the tank, allowing the liquid to wash down the surface under gravity, and collecting a sample of the washing by a collecting means engaged with the surface below the region where the jet or spray impinges on the surface. The apparatus comprises a tank containing liquid washing medium, means for directing a pressurized jet or spray of the liquid on to the surface which is to be washed, and collecting means adapted for engagement with the surface for collecting a sample of the washings. |
