Seamless Steel Tubes for High-Pressure Boilers: Detailed Explanation of Performance and Applications

Seamless steel tubes for high-pressure boilers are mainly used to manufacture piping for high-pressure steam boilers. These tubes require high creep strength, oxidation resistance, and good structural stability. Operating under high temperature and pressure, they are susceptible to oxidation and corrosion. Therefore, they need specific chemical compositions and mechanical properties.

 

 

Material and Steel Grades

High-quality carbon structural steel, such as 20G, 20MnG, 25MnG, etc.

Alloy structural steel: such as 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.

Rust-resistant heat-resistant steel: such as 1Cr18Ni9, 1Cr18Ni11Nb, etc.

 

Performance Requirements

Chemical Composition: Ensure the chemical composition of the seamless steel tubes for high-pressure boilers meets the requirements.

Mechanical Properties: The steel tubes need to meet specific mechanical property standards.

Hydraulic Pressure Test: Each steel tube needs to undergo a hydraulic pressure test.

Flaring and Flattening Tests: Inspect the flaring and flattening performance of the steel pipe.

Heat-Treated Delivery: The steel pipe is delivered in a heat-treated condition to ensure its microstructure stability.

 

Other Requirements:

Microstructure: The microstructure of the steel pipe must meet specific standards.

Grain Size: The grain size must meet certain requirements.

Decarburization Layer: Check for the presence of a decarburization layer.

 

These seamless steel pipes for high-pressure boilers are not only used in high-pressure boilers but also widely applied in other high-temperature and high-pressure environments, such as petrochemicals and power generation.