Stainless steel welded pipe is a common pipe material widely used in construction, chemical, petroleum, pharmaceutical and other industries. It has the advantages of corrosion resistance, high strength, and high temperature resistance, so it is very popular. So, what is the raw material of stainless steel welded pipe?
The main raw material of stainless steel welded pipe is stainless steel plate and strip. Stainless steel strip is a thin plate material made from stainless steel through continuous casting, rolling, annealing and other processes. Stainless steel plates and strips have the characteristics of corrosion resistance, high temperature resistance, high strength, and wear resistance, so they are very suitable as raw materials for stainless steel welded pipes.
The main components of stainless steel strips are alloys of iron, chromium, nickel and other elements. Among them, chromium is the most important alloying element. It can react with oxygen to form a dense chromium oxide protective film, which prevents stainless steel from being corroded. Nickel can improve the toughness and corrosion resistance of stainless steel. In addition, there are some other alloying elements, such as molybdenum, vanadium, titanium, etc., used to improve the special properties of stainless steel.
When manufacturing stainless steel strips, the raw materials need to be smelted first, usually using an electric arc furnace or an induction furnace. The smelted stainless steel liquid passes through the continuous casting machine and is cooled into a cast slab. The slab is then rolled through a rolling mill into the desired strip shape. In order to improve the performance of the plate and strip, annealing is usually required to eliminate stress and improve toughness.
The stainless steel strip is cut and formed into the mother pipe of the stainless steel welded pipe. Then, the mother pipe is welded into the desired pipe shape through a welding process. There are many welding processes, the common ones are TIG welding1, MIG welding2, etc. After welding is completed, surface treatment, such as deoxidation, sandblasting, etc., is required to improve the surface quality of the stainless steel welded pipe.
To sum up, the raw material of stainless steel welded pipe is stainless steel plate and strip, which is a thin plate material made of stainless steel through continuous casting, rolling, annealing and other processes after smelting. The main components of stainless steel strips are alloys of iron, chromium, nickel and other elements. Chromium is the most important alloy element, which can prevent stainless steel from being corroded. The stainless steel strips are cut, formed, welded and finally made into stainless steel welded pipes. Stainless steel welded pipe has the advantages of corrosion resistance, high strength, high temperature resistance, etc., and is widely used in various industries.
Note:
1. TIG welding (Tungsten Inert Gas Welding), also known as non-melting extremely inert gas shielded arc welding. Whether it is manual welding or automatic welding of 0.5 to 4.0mm thick stainless steel, TIG welding is the most commonly used welding method. TIG welding with filler wire is often used for bottom welding of pressure vessels because the air tightness of TIG welding is better and can reduce the pores in the weld seam during pressure vessel welding. The heat source of TIG welding is a DC arc, the working voltage is 10 to 95 volts, but the current can reach 600 amps. The correct connection method of the welding machine is that the workpiece is connected to the positive electrode of the power supply, and the tungsten electrode in the welding torch is used as the negative electrode. The inert gas is usually argon.
2.MIG welding
MIG welding (melting electrode inert gas shielded welding) is an arc welding method that uses a melting electrode and an external gas as the arc medium to protect the metal droplets, welding pool and high-temperature metal in the welding zone. It is called melting electrode gas shielded arc welding. The inert gas (Ar or He) shielded arc welding method using solid wire is called molten extremely inert gas shielded welding, or MIG welding for short.
The main raw material of stainless steel welded pipe is stainless steel plate and strip. Stainless steel strip is a thin plate material made from stainless steel through continuous casting, rolling, annealing and other processes. Stainless steel plates and strips have the characteristics of corrosion resistance, high temperature resistance, high strength, and wear resistance, so they are very suitable as raw materials for stainless steel welded pipes.
The main components of stainless steel strips are alloys of iron, chromium, nickel and other elements. Among them, chromium is the most important alloying element. It can react with oxygen to form a dense chromium oxide protective film, which prevents stainless steel from being corroded. Nickel can improve the toughness and corrosion resistance of stainless steel. In addition, there are some other alloying elements, such as molybdenum, vanadium, titanium, etc., used to improve the special properties of stainless steel.
When manufacturing stainless steel strips, the raw materials need to be smelted first, usually using an electric arc furnace or an induction furnace. The smelted stainless steel liquid passes through the continuous casting machine and is cooled into a cast slab. The slab is then rolled through a rolling mill into the desired strip shape. In order to improve the performance of the plate and strip, annealing is usually required to eliminate stress and improve toughness.
The stainless steel strip is cut and formed into the mother pipe of the stainless steel welded pipe. Then, the mother pipe is welded into the desired pipe shape through a welding process. There are many welding processes, the common ones are TIG welding1, MIG welding2, etc. After welding is completed, surface treatment, such as deoxidation, sandblasting, etc., is required to improve the surface quality of the stainless steel welded pipe.
To sum up, the raw material of stainless steel welded pipe is stainless steel plate and strip, which is a thin plate material made of stainless steel through continuous casting, rolling, annealing and other processes after smelting. The main components of stainless steel strips are alloys of iron, chromium, nickel and other elements. Chromium is the most important alloy element, which can prevent stainless steel from being corroded. The stainless steel strips are cut, formed, welded and finally made into stainless steel welded pipes. Stainless steel welded pipe has the advantages of corrosion resistance, high strength, high temperature resistance, etc., and is widely used in various industries.
Note:
1. TIG welding (Tungsten Inert Gas Welding), also known as non-melting extremely inert gas shielded arc welding. Whether it is manual welding or automatic welding of 0.5 to 4.0mm thick stainless steel, TIG welding is the most commonly used welding method. TIG welding with filler wire is often used for bottom welding of pressure vessels because the air tightness of TIG welding is better and can reduce the pores in the weld seam during pressure vessel welding. The heat source of TIG welding is a DC arc, the working voltage is 10 to 95 volts, but the current can reach 600 amps. The correct connection method of the welding machine is that the workpiece is connected to the positive electrode of the power supply, and the tungsten electrode in the welding torch is used as the negative electrode. The inert gas is usually argon.
2.MIG welding
MIG welding (melting electrode inert gas shielded welding) is an arc welding method that uses a melting electrode and an external gas as the arc medium to protect the metal droplets, welding pool and high-temperature metal in the welding zone. It is called melting electrode gas shielded arc welding. The inert gas (Ar or He) shielded arc welding method using solid wire is called molten extremely inert gas shielded welding, or MIG welding for short.
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