Seamless steel pipe (SMLS pipe) is an important steel product widely used in construction, petroleum, chemical industry, machinery and other fields. According to different application requirements, seamless steel pipes can be divided into various types. This article will introduce the types and applications of seamless steel pipes.
1. Types of seamless steel pipes
Classification by use:
Seamless steel pipes can be divided into the following types according to their uses:
(1) Seamless steel pipes for fluids: mainly used for pipelines for transporting fluids such as oil and natural gas, and the specifications are generally Φ159-426mm.
(2) Galvanized seamless steel pipes for low-pressure fluid transportation: mainly used for conveying low-pressure fluids such as water, gas, and air, and the specifications are generally Φ10-159mm.
(3) Seamless steel pipes for oil transportation: mainly used for oil, natural gas and other fluid pipelines, and the specifications are generally Φ219-426mm.
(4) Seamless steel pipes for chemical fertilizer equipment: mainly used to transport chemical raw materials such as ammonia and urea, and the specifications are generally Φ219-426mm.
(5) Seamless steel pipes for deep well pumps: mainly used for transporting groundwater, and the specifications are generally Φ76-168mm.
Classified by surface quality:
According to the surface quality, seamless steel pipes can be divided into the following categories:
(1) Seamless steel pipe with good surface quality: good surface quality, no scale, no cracks and other defects, can be used in high-pressure boilers, petroleum cracking, chemical equipment and other occasions.
(2) Seamless steel pipes with poor surface quality: there are defects such as oxide scales and cracks on the surface, which can be used for low-pressure fluid transportation, farmland irrigation and other occasions.
Classified by material:
Seamless steel pipe can be divided into the following types according to the material:
(1) Ordinary
carbon steel seamless pipe: the material is ordinary carbon steel, which is often used in low-pressure fluid transportation, farmland irrigation and other occasions.
(2) Low-alloy steel seamless pipe: the material contains a certain amount of alloy elements, and is often used to transport high-pressure fluids such as oil and natural gas.
(3)
Stainless steel seamless pipe: The material is stainless steel, which is often used in food, pharmaceutical and other industries, and has the characteristics of corrosion resistance and hygiene.
2. Application of seamless steel pipe
Seamless steel pipe is a very important steel product widely used in various fields. The following introduces the application of seamless steel pipes in construction, petroleum, chemical industry, machinery and other fields.
1) Construction field
Seamless steel pipes are widely used in the field of construction, mainly used in important structures such as high-rise buildings, cold storage, roof waterproofing, etc., to play the role of load-bearing and waterproof.
2) Petroleum field
Seamless steel pipes are also widely used in the petroleum field, mainly for the construction and installation of petroleum pipelines, petroleum storage tanks and other equipment. Because seamless steel pipe has the characteristics of corrosion resistance, high temperature resistance, and high pressure resistance, it has been widely used.
3) Chemical field
Seamless steel pipes are also widely used in the chemical industry, mainly for transporting ammonia, urea, methanol and other chemical raw materials. Since these media are often corrosive, seamless steel pipes are required to ensure the safe operation of the pipeline.
4) Mechanical field
Seamless steel pipes are also widely used in the field of machinery, mainly for the manufacture of parts for agricultural machinery such as automobiles and tractors. Due to the characteristics of high strength and corrosion resistance, seamless steel pipes have been widely used.
To sum up, seamless steel pipe is a very important steel species, which has a wide range of applications in many fields. With the continuous development of science and technology, the application prospect of seamless steel pipe will be more extensive.
