1. Cleaning of seamless elbow material: Use solvents and emulsions to clean wear-resistant elbows. Ceramic elbows, ceramic composite elbows, to remove oil, grease, dust, lubricants and similar organic matter, but it cannot remove rust, oxide scale, welding flux, etc. on the surface of steel, so it is only used as an auxiliary in anti-corrosion production means.

2. Derusting of seamless elbow material 　 mainly use wire brushes and other things to polish the surface of the steel, which can remove loose or warped oxide scale, rust, welding slag, etc. Manual tool derusting can reach Sa2 level, and power tool derusting can reach Sa3 level. If the steel surface adheres to a strong oxide scale, the derusting effect of the tool is not ideal, and the anchor pattern depth required for anti-corrosion construction cannot be reached.
3. The pickling of seamless elbow material generally uses chemical and electrolytic pickling treatments. Wear-resistant elbows, wear-resistant ceramic elbows, ceramic elbows, ceramic composite elbows are only used for corrosion protection, which can remove oxidation. Skin, rust, and old coatings can sometimes be used as reprocessing after sandblasting and rust removal. Although chemical cleaning can make the appearance reach a certain degree of cleanliness and roughness, its anchor pattern is shallow, and it is easy to pollute the environment. The application of seamless elbows is now very common in people's lives, so do you know which grades of seamless elbows can be divided into? The editor of seamless elbow manufacturers will introduce the specific content below.
Generally, the appearance of the hot-rolled seamless elbow product is FA. The seamless elbow product after pickling is FB. The cold-rolled seamless elbow product is FB/FC/FD. The general seamless elbow product is a product that does not require high appearance, such as a car. Board, use FB appearance. Regarding the exterior panels of some cars whose general requirements are not particularly high, use the FD exterior of FC high-end cars. Usually the pickled seamless elbow product is FB surface, so it can replace cold-rolled products to make some structural parts. There are a few less processes behind, which can save the company's cost.
In addition, the surface of seamless elbow material is easy to remove the oxide scale when welding. Relatively speaking, compared with hot-rolled products, the welding of pickled products is easier. If there are subsequent oiling, varnishing, etc., it is easier , The quality is better. In addition, the dimensional accuracy is much better than that of hot-rolled products, and the dimensional accuracy is higher than that of hot-rolled seamless elbow products. In addition, it is better for the pickled product to have a flat plate shape, and the unevenness and so on are better. The surface finish is much better than that of hot-rolled products, and the degree of beauty is higher.