Let’s first talk about the original surface of the stainless steel pipe: NO.1 The surface that is subjected to heat treatment and pickling after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industrial equipment, etc., the thickness is thicker from 2.0MM to 8.0MM. Blunt surface: NO.2D After heat treatment and pickling after cold rolling, the material is soft and the surface is silvery white, used for deep drawing processing, such as automobile components, water pipes, etc.
Different surface processing and grades, different characteristics, and uses will lead to different treatment methods, and considerable attention and caution are still required in the application.
The surface treatment of the spiral steel pipe mainly uses tools such as wire brushes to polish the surface of the steel, which can remove loose or raised scales, rust, welding slag, etc. Hand tool de-rusting can reach the Sa2 level, and power tool de-rusting can reach the Sa3 level. If the steel surface is attached with a strong oxide scale, the de-rusting effect of the tool is not ideal, and the anchor pattern depth required for anti-corrosion construction cannot be reached.
Hairline surface HAIRLINE: HL NO.4 is a product of grinding patterns produced by continuous grinding with a polishing abrasive belt of appropriate particle size (subdivision No. 150-320). It is mainly used for architectural decoration, elevators, doors and panels of buildings, etc.
Bright side: BA is a product obtained by bright annealing after cold rolling and smoothing. The surface gloss is excellent and has high reflectivity. Like a mirror surface. Used in home appliances, mirrors, kitchen equipment, decorative materials, etc.
After the spray (throwing) of the spiral steel pipe is trusted, it can not only expand the physical adsorption effect of the pipe surface but also strengthen the mechanical adhesion effect between the anti-corrosion layer and the pipe surface. Therefore, spray (throwing) shot de-rusting is an ideal de-rusting method for pipeline corrosion. Generally speaking, shot blasting (sand) de-rusting is mainly used for the treatment of the inner surface of the pipe, and shot blasting (sand) de-rusting is mainly used for the surface treatment of the pipe.
Post time: Jul-04-2023