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the necessary inspections and tests, including an external examination, an internal inspection and hydrostatic testing equipment to detect and eliminate hidden defects, in order to avoid running the boiler in the event of an accident; (5) preheat the cylinder by the national statutory monitoring department regularly monitored, including structure, geometry and welding, etc., such as longitudinal / circumferential weld maximum amount diagonal wrong side, vertical / maximum girth welds angular degree. In terms of visual inspection, pay attention to whether there are body and weld cracks, overheating, deformation, leakage and other phenomena and internal and external surface corrosion and mechanical damage and so on. - The scene of |
