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What is boiler tube
The boiler tube is a branch pipe of the seamless steel pipe. It is used for boiler, heat-exchanger, or superheater. It has stringent requirements for the manufacture of steel pipes. According to the working temperature. It can be divided into general boiler tubes and high-pressure boiler tubes. Some of the boiler pipes are made of carbon steel and alloy steel. Both carbon steel boiler tubes and alloy steel boiler tubes have different usage situations and temperature situations.
What is boiler tube
The boiler tube is a branch pipe of the seamless steel pipe. It is used for boiler, heat-exchanger, or superheater. It has stringent requirements for the manufacture of steel pipes. According to the working temperature. It can be divided into general boiler tubes and high-pressure boiler tubes. Some of the boiler pipes are made of carbon steel and alloy steel. Both carbon steel boiler tubes and alloy steel boiler tubes have different usage situations and temperature situations.
Size of boiler tube
Size of boiler tube
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Manufacturing process of boiler tube
Manufacturing process of boiler tube
Standard of boiler tube
Outer Diameter Tolerances | ||
Standard | Outer Diameter | Tolerance |
GB3087 | ≤180 | ±1.0% |
GB5310 | ≤50 | ±0.5mm |
>50 | ±1.0% |
Wall Thickness Tolerances | ||
Standard | Wall Thickness(mm) | Tolerance |
GB3087 | 3-20 | +15%,12.5% |
>20 | ±12.5% | |
GB5310 | <3.5 | +15%,-10% |
3.5-20 | +15%,-10% | |
>20 | ±10% |
Chemical composition and mechanical properties | |||||||||
Standard | Grade | Chemical composition(%) | Mechanical properties | ||||||
C | Si | Mn | P | S | Tensile Strength | Yield Strength | Elongation | ||
DIN17175 | St35.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.030 | ≤0.030 | 360-480 | ≥235 | ≥25 |
St45.8 | ≤0.21 | 0.10-0.35 | 0.40-1.20 | ≤0.030 | ≤0.030 | 410-530 | ≥255 | ≥21 |
Standard of boiler tube
Outer Diameter Tolerances | ||
Standard | Outer Diameter | Tolerance |
GB3087 | ≤180 | ±1.0% |
GB5310 | ≤50 | ±0.5mm |
>50 | ±1.0% |
Wall Thickness Tolerances | ||
Standard | Wall Thickness(mm) | Tolerance |
GB3087 | 3-20 | +15%,12.5% |
>20 | ±12.5% | |
GB5310 | <3.5 | +15%,-10% |
3.5-20 | +15%,-10% | |
>20 | ±10% |
Chemical composition and mechanical properties | |||||||||
Standard | Grade | Chemical composition(%) | Mechanical properties | ||||||
C | Si | Mn | P | S | Tensile Strength | Yield Strength | Elongation | ||
DIN17175 | St35.8 | ≤0.17 | 0.10-0.35 | 0.40-0.80 | ≤0.030 | ≤0.030 | 360-480 | ≥235 | ≥25 |
St45.8 | ≤0.21 | 0.10-0.35 | 0.40-1.20 | ≤0.030 | ≤0.030 | 410-530 | ≥255 | ≥21 |
Application of boiler tube
Steam Boilers
Power Generation
Fossil Fuel Plants
Electric Power Plants
Industrial Process Plants
Co generation Facilities
Application of boiler tube
Steam Boilers
Power Generation
Fossil Fuel Plants
Electric Power Plants
Industrial Process Plants
Co generation Facilities
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