Choosing the appropriate LSAW Steel Pipe requires comprehensive consideration of multiple factors. The following are some suggestions for selecting LSAW steel pipes based on different usage environments:

General industrial environment

Medium characteristics: If the medium being transported is ordinary water, air, steam, etc., the corrosion resistance requirements for steel pipes are relatively low. At this point, ordinary LSAW steel pipes such as Q235B, Q345B, etc. can be selected, which have good mechanical and processing properties and can meet the requirements of general industrial environments.

Pressure and temperature: For pipeline systems with low working pressure (generally less than 1.6MPa) and temperatures between room temperature and 200 ℃, ordinary wall thickness LSAW steel pipes can meet the requirements. But if the pressure is high or the temperature exceeds 200 ℃, it is necessary to choose a higher strength grade of steel or increase the wall thickness of the steel pipe according to the specific situation to ensure the safe operation of the pipeline.

Chemical industry

Corrosive media: Various corrosive media such as acids, alkalis, salt solutions, etc. are often involved in the chemical industry. In this environment, LSAW steel pipes with good corrosion resistance should be selected. For example, for dilute sulfuric acid medium, LSAW steel pipes made of 316L stainless steel material can be used, which contains molybdenum element and can effectively resist the corrosion of sulfuric acid; For sodium hydroxide solution, LSAW steel pipes with anti-corrosion materials such as 304 stainless steel or carbon steel lined with rubber, plastic, etc. can be selected.

High temperature and high pressure environment: Many chemical production processes are carried out under high temperature and high pressure conditions, such as ammonia synthesis, methanol synthesis, etc. For such environments, it is necessary to use high-strength, high-temperature resistant, and high-pressure resistant LSAW steel pipes, such as P91, P92, and other chromium molybdenum alloy steel pipes. These steels can maintain good mechanical properties and creep resistance at high temperatures, and can meet the long-term stable operation requirements of high-temperature and high-pressure pipeline systems in the chemical industry.

Oil and gas industry

Oil and gas transportation: In long-distance transportation of oil and gas, LSAW steel pipes need to have high strength, high toughness, and good corrosion resistance. LSAW steel pipes are generally manufactured using high-grade pipeline steels such as X70 and X80. These steels have excellent mechanical properties and resistance to hydrogen sulfide corrosion through processes such as microalloying and controlled rolling and cooling, and can adapt to complex geological conditions and harsh natural environments.

Marine platform application: The marine environment where offshore oil platforms are located has characteristics such as high salinity, high humidity, and strong corrosiveness, which require extremely high corrosion resistance and fatigue resistance of steel pipes. Therefore, LSAW steel pipes made of alloy steel that is resistant to seawater corrosion are often selected, and special anti-corrosion coatings and cathodic protection measures are adopted to extend the service life of the steel pipes. At the same time, considering the structural characteristics and stress conditions of offshore platforms, the dimensional accuracy and connection reliability of steel pipes also need to be strictly controlled.

In the field of architectural structures

Structural support: In building structures, LSAW steel pipes can be used to make structural components such as columns and beams. For general building structures, LSAW steel pipes made of steel with moderate strength grades such as Q345B and Q390B can be selected. These steel pipes have good strength and toughness, and can meet the bearing capacity requirements of building structures.

Appearance requirements: If the building structure has high requirements for appearance, such as the exposed structural components of some iconic buildings, LSAW steel pipes with good surface quality and beautiful welds can be selected, and surface treatment such as galvanizing, spraying, etc. can be carried out as needed to improve the corrosion resistance and decorative properties of the steel pipes.

Mining industry

Ore transportation: The pipeline system used for transporting ore in mines needs to withstand the wear and impact of ore particles, so LSAW steel pipes with high hardness and wear resistance should be selected. Generally, composite steel pipes lined with wear-resistant materials, such as LSAW steel pipes lined with wear-resistant materials such as ceramics and tungsten carbide, can effectively extend the service life of steel pipes and reduce maintenance costs.

Slurry transportation: For pipelines transporting slurry, in addition to considering wear resistance, it is also necessary to consider the corrosion resistance of steel pipes. Select appropriate anti-corrosion measures based on the acidity and chemical composition of the slurry, such as using anti-corrosion coatings, lining adhesives, and other methods to protect LSAW steel pipes from corrosion by the slurry.