Appearance quality inspection of C-shaped steel
1、 When observing the surface of cold-drawn C-shaped steel with the naked eye, the surface should be clean, smooth, bright or dull, without cracks, inclusions, hairlines, wrinkles, and scales. Individual small scratches, tensile cracks, black spots, four edges, pits, etc. Allow nominal size deviation not greater than the actual size.
2、 The section steel should be straight, the steel plate should be flat, and the side ends should be cut into right angles. In addition to the above regulations, there should be no shrinkage, delamination, or cracks on the surface of the rail end and bolt hole, and both ends should be milled flat.
3、 When observing the surface of hot-rolled C-shaped steel with the naked eye, there should be no cracks, wrinkles, scars, layering, or inclusions. Dents, local protrusions, edges, and pits are allowed, but the height or depth cannot exceed relevant technical standards. Local defects are allowed to be removed, but horizontal removal is not allowed. Remove the allowable negative deviation of C-shaped steel that cannot exceed the difference between this size and the actual size.
4、 The wall thickness, surface roughness, roundness, and straightness of steel pipes should comply with technical standards. The connecting threads of threaded pipes, galvanized steel pipes, and geological pipes should be coated with oil and equipped with protective rings.
5、 The galvanized layer of galvanized steel plates and galvanized steel pipes shall not have defects such as cracks, layering, or missed plating.
6、 The appearance of the section steel should be flat and neat, and its roundness, edge width, height, thickness, length, torsion, slope, wave curvature, wave bending, and straightness should not exceed the deviation specified in relevant standards.
Stacking of Jinan C-beam
1、 The stacking principle is to stack according to variety and specifications under stable and determined conditions. Different types of materials should be stacked separately to prevent confusion and mutual corrosion.
2、 The same materials are stacked separately according to the warehouse receipts, which facilitates the implementation of the first out principle.
3、 There should be corresponding passages between the stacks, with an inspection passage generally of 0.5m and an entry and exit passage generally of 1.5-2.0m, depending on the size of the materials and transportation machinery.
4、 It is prohibited to store items with corrosive C-shaped steel near the stacking location.
5、 The pile bottom should be high, solid, and flat to prevent moisture or deformation of the material.
The use of C-shaped steel anti-corrosion agents or other electroplating and packaging before leaving the factory is an important measure to prevent material corrosion. It should be protected during transportation, loading and unloading, not damaged, and can extend the storage life of the material. For more related matters, come to our website http://www.cworksmarketing.com consulting service