1. What are the materials and chemical composition of low and medium pressure boiler steel pipes?
Carbon structural steel: Mainly uses No. 20 steel (carbon content ≤0.17%), possessing good plasticity and toughness.
Chemical composition control: Strictly limits the content of elements such as carbon, silicon, manganese, phosphorus, and sulfur, ensuring the strength, toughness, and corrosion resistance of the steel pipe.
2. What are the mechanical properties of low and medium pressure boiler steel pipes?
Tensile strength: ≥410 MPa, reflecting stability under high pressure.
Yield strength: ≥245 MPa, reflecting the deformation capacity of the steel pipe under pressure.
Elongation: ≥25%, measuring the plastic deformation capacity of the steel pipe, preventing cracking during use.
3. What are the dimensions and specifications of low and medium pressure boiler steel pipes?
Outer diameter range: 10 mm to 426 mm, wall thickness range: 1.5 mm to 26 mm, offering a variety of specifications.
Dimensional Accuracy: Strict control over outer diameter and wall thickness tolerances ensures installation compatibility and interchangeability.
4. What are the heat treatment and processing properties of low and medium pressure boiler steel pipes?
Heat Treatment: Cold drawing and normalizing processes refine grain size and improve strength and toughness.
Processing Properties: Flattening, flaring, and edge rolling meet various manufacturing requirements.
5. How good are the corrosion resistance and oxidation resistance of low and medium pressure boiler steel pipes?
Corrosion Resistance: Appropriate chemical composition and heat treatment enhance the corrosion resistance of the steel pipes under high-temperature and high pressure environments.
Oxidation Resistance: Suitable for high-temperature areas of low and medium pressure boilers, such as superheater and reheater tubes.
6. Quality Inspection and Certification of Low and Medium-Pressure Boiler Steel Pipes
Inspection Methods: Including hydrostatic testing and non-destructive testing (such as ultrasonic and radiographic testing), ensuring the steel pipe quality meets standards.
Quality Certification: Steel pipes conforming to GB/T 3087-2022 standards undergo rigorous quality certification to ensure reliability and safety.
7. Application Areas of Low and Medium-Pressure Boiler Steel Tubes
Low and medium pressure boilers: Used in the manufacture of key components such as water-cooled walls, superheaters, and steam pipes.
Fluid transportation: Suitable for fluid piping systems in the power, chemical, and petroleum industries.
Machinery manufacturing and construction: Also used in machinery manufacturing and light industrial construction.
8. Advantages and Characteristics of Low and Medium-Pressure Boiler Steel Tubes
High strength and high toughness: High tensile strength and yield strength, good elongation, preventing cracking during use.
Good processing performance: Carbon structural steel is easy to process into various shapes and sizes.
Economy: Compared to steel tubes for high-pressure boilers, it has a lower cost and higher cost-effectiveness.
Post time: Feb-27-2026