Double H fin tube carbon steel boiler tube  

The quality measurement standard of H type fin tube is mainly considered by the following important standards: (1) Welding quality: H-type finned tube adopts new welding process, and a plurality of zigzag structures are adopted in the welding contact part of the h finned tube, so that the heating is uniform, the welding surface is uniform and smooth, and there is no slag inclusion stomatal welding nodules, and the welding fusion rate is as high as 97%. Due to uniform heating, the compressive plastic deformation produced in the welding process is reduced, the longitudinal residual tensile stress near the weld is reduced, and the residual compressive stress of the fin far away from the weld is greatly reduced, which can significantly reduce the wave deformation of the fin. The welding quality of H - fin tube meets the requirements of technical conditions. 2) Appearance inspection: Sample inspection of outer weld and inner crack of the Welded H-shaped finned tube; Checking the basic d…