What are the items that should be checked regularly for stainless steel heat exchange tubes?
First, a comprehensive inspection of the heat exchanger tube's appearance is performed, focusing on surface defects such as cracks, scratches, pits, bulges, scale, and rust. Welds should be inspected specifically for weld beading, incomplete penetration, porosity, and slag inclusions, as these defects can directly affect the tube's sealing and pressure-bearing capacity. For heat exchanger tubes exposed to corrosive media, special attention should be paid to inspecting the tube wall for uniform corrosion, particularly at vulnerable areas such as the inlet and outlet ports and U-bends, as these areas are often the first to show signs of corrosion thinning. Wall thickness measurement is a core inspection item. An ultrasonic thickness gauge is used to measure the heat exchanger tube at multiple points, focusing on tube-sheet joints and sections identified as problematic during previous inspections. The measured data should be compared with the original design wall thickness. Any wall...
