Stainless steel seamless pipe is a kind of hollow long round steel, which is mainly used for industrial pipelines and mechanical structural parts such as petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and so on. It is widely used due to its good corrosion resistance

Excess weld metal refers to the height of the metal on the line connecting the two toes on the surface of the weld. There should be excess weld metal in the welding process of the welded pipe. Because it plays the role of the last layer of heat preservation and slow cooling, it plays a great role in refining grains and reducing welding stress. It is also a collection area for inclusions such as pores.

Cracking is one of the common defects of seamless steel pipe. When the seamless steel pipe is quenched, it will also cause cracking of the seamless steel pipe due to improper handling.

Low carbon steel pipe is a carbon steel pipe with a carbon content of less than 0.25%. Due to the low carbon content of low carbon steel and good weldability, it is usually not necessary to take special technological measures to obtain high-quality welded joints. Seamless steel pipes, alloy pipes, low and medium pressure boiler pipes, and oil pipes are mostly low carbon steel pipes.

The raw materials used in ERW steel pipes are hot-rolled coils produced by regular large factories, and the chemical composition and physical properties are relatively stable.Most of the raw materials used in the spiral tube factory are low-grade hot-rolled strip steel, the chemical composition and physical properties are not stable, and there are many internal defects and impurities.

The seamless steel pipe has a hollow section and is widely used as a pipeline for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with ordinary seamless pipes, stainless steel seamless pipes have higher corrosion resistance, and the finish is better than ordinary seamless steel pipes. But this does not mean that stainless steel seamless pipes will not be corroded.