Leakage in the welded joints of stainless steel tubes and plates during use is the main reason why stainless steel heat exchangers cannot work properly.

Due to the excellent performance of seamless stainless steel pipes, they are very popular in use and the prices are very reasonable. Therefore, in the downstream spot market, fake and shoddy seamless stainless steel pipes appear from time to time, which are fluid pipes. In fact, this kind of pipe is processed high-quality Frequency welded pipe.

Neutral seawater has more dissolved oxygen. Except for magnesium and other alloys, the corrosion of most marine structural materials in seawater is due to the cathodic process controlled by oxygen depolarization.

Common stainless steel delivery states include hot rolling, cold rolling, controlled rolling, normalizing, tempering, annealing, quenching, tempering, etc. The hot rolling state can effectively reduce energy consumption and costs, and can optimize stainless steel pipes and alloys. processing performance.

The first is stainless steel. If a stainless steel model with weak corrosion resistance is used, it is still susceptible to corrosion. Generally, 304 stainless steel pipes contain nickel and have better acid resistance in highly polluted industrial areas and humid atmospheric environments, and are widely used in various fields. The application in gas engineering is also relatively good.

In the iron oxide scale, the richtenite structure only exists on the surface close to the stainless steel plate, and the Fe3O4 and Fe2O3 in the outer layer of the iron scale are difficult to dissolve in the acid solution.

Stainless steel pipes need to be packaged in different ways depending on their product type, finish, size and transportation method. Because the finished products of stainless steel pipes are usually conduits, pressure pipes, mechanical pipes, decorative pipes, etc.,

In terms of the selection of austenitic stainless steel welding materials, the selection principle of austenitic stainless steel welding materials is to ensure that the corrosion resistance and mechanical properties of the weld metal are basically equivalent to or even higher than the base metal without cracks. , usually requiring that its alloy composition roughly matches the composition of the parent metal.

Domestic compression pipe fittings are the same as the compression pipe fittings above. They are a connection method in which the pipe is inserted into the socket of the pipe fitting and tightened with a nut to compress the sealing ring to act as a seal.

Let’s talk about flame cutting first. This is not a very good method, because the stainless steel pipe port will definitely change color during cutting. The melting point of the oxide of chromium-nickel stainless steel is higher than the melting point of the material itself, so it is best not to use oxygen cutting.

The wall thickness is thinned, the diameter is increased, the water resistance is reduced, the flow rate is increased, the outlet water temperature is reduced, the logarithmic average temperature difference is reduced, and the result of the comprehensive effect is: the relative vacuum is increased.

In various actual use situations, the wall thickness of stainless steel water supply pipes is not exactly the same. There are many factors that affect the adjustment of wall thickness, such as mechanics, corrosion resistance, wear resistance, economy, connection methods, etc. These factors will be analyzed in detail below.