LSAW Steel Pipe

There are mechanical, chemical and electrochemical methods for removing scale from stainless steel pipes. Due to the complexity of the scale composition of stainless steel pipes, it is not easy to remove the scale on the surface and make the surface highly clear and smooth. The removal of scale on stainless steel welded pipes generally takes two steps, one is pretreatment, and the other is ash removal. The pretreatment of the scale of the stainless steel welded pipe makes the scale loose, and then pickling is easy to remove. Preprocessing can be divided into the following methods: 1. Alkaline nitrate melting treatment method. The alkaline melt contains 87% hydroxide and 13% nitrate. The ratio of the two in the molten salt should be strictly controlled so that the molten salt has strong oxidizing power, low melting point and low viscosity. In the production process, only analysis of sodium nitrate containing halo not less than 8% (wt). The treatment is carried out in a salt bath furnace...