Did not meet the quality performance in steel production

1, the steel structure plant in welding, light steel welded H beam flange is expected to open before stitching, weld not installed cited arc quenching plate caused the weld is not full, the edge of the pits incomplete fusion, with the base metal arrhythmia level; column foot, corbel leg length is less than the provisions of the design drawings, the phenomenon of the collapsed side of the fillet weld serious, generally lower than the base metal arc Department received more stomata; CO2 welding weld formation width inconsistent level of inconsistency, suddenly big and small; SMAW Weld is not straight, varies in width, undercut serious; welding slag splashing is not cleaned.
2, in cutting, cutting, the flange plate dimensions width varies, inconsistencies caused by the size of the H-beam and corbel, the contact of the steel beams and corbels upper and lower flange plates misplaced about a plate thickness; cutting edge deeper cuts, the board side depression or deeper serrations India, cutting roughness exceeded puzzle cutting edge is not perpendicular, stitching the wrong side and other excessive.
 3, when assembled, welded H steel no assembly tire rack, resulting in the height dimension of the H-shaped steel deviation web partial center; the wing webs docking, weld not flattening obvious irregularities; Strut webs uneven. Before assembly uncorrected.
4 In drilling, without the prior good triage drawings, in the open single row of holes, to open a double row of holes, the results did not fill holes retained in members. H-shaped steel column with corbel connection at the double row, while the beam with the same size of the secondary beam H-beam is a single row of holes, openings when opened double row, after installation, impact strength and appearance quality.
5, the assembly process, the steel columns corbels with H-shaped steel beams connected at the upper and lower dislocation around the dislocation, not to control size. Component transport and stacking process-free the shelving pieces of pad level stacked, but free to unload clutter piling up, and even let the member buried in the the mud heap ditch in the cause Deformation, bumps and pollution.
7, the component factory, steel columns, steel beams centerline mark is not marked, are quite common, to the installation and construction correction detection difficult.
8, rust and paint: rust sloppy, does not meet the grade requirements, paint soon return rust, flaking; uneven film thickness, the yang side thickness generally extra-thick, up to 250μ m, but the the nightside often in the 90μm about ( the indoor film thickness provisions 125μ m); paint before impurities is not clean, dirt, rugged, sagging more prevalent.
The 9 wing web splice length does not meet the requirements. Such as wing splice length should not be less than 2 times the flange width, flange and web splicing welds should be staggered 200mm or more, the web splice length is not less than 600mm. But it often does not meet the above requirements.