Scope of application of seamless steel pipes

The scope of application of seamless steel pipes is as follows:

1. Seamless steel pipes for general use are rolled from ordinary carbon structural steel, low alloy structural steel or alloy structural steel, with high output, and are mainly used as pipes or structural parts for conveying fluids.

2. They are supplied in three categories according to different uses: supply according to chemical composition and mechanical properties; supply according to mechanical properties; supply according to water pressure test. Steel pipes supplied in the first two categories, if used to withstand liquid pressure, must also be subjected to water pressure tests.

3. Seamless pipes for special purposes include seamless pipes for boilers, chemical power, geological seamless steel pipes, and seamless pipes for petroleum.

Seamless steel pipes have hollow cross-sections and are widely used as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, coal gas, water and certain solid materials. Compared with solid steels such as round steel, steel pipes are lighter in weight when the bending and torsional strengths are the same, and are an economical cross-section steel.

Seamless steel pipes are widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction. The use of steel pipes to manufacture annular parts can improve material utilization, simplify the manufacturing process, save materials and processing time, and have been widely used in steel pipe manufacturing.

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