Boiler tubes refer to steel products with openings at both ends and a hollow section, with a large ratio of length to circumference. According to the production method, they can be divided into seamless steel tubes and welded steel tubes. The specifications of steel tubes are expressed by external dimensions (such as outer diameter or side length) and wall thickness. The size range is very wide, from capillaries with very small diameters to large-diameter tubes with diameters of several meters. Boiler tubes are key components in industrial boiler systems, and their pressure-bearing capacity is directly related to the safety and efficiency of the system. So, how much pressure can boiler tubes withstand?
Boiler tubes pressure capacity range
1. High-pressure boiler tubes can usually withstand pressures above 6.4MPa.
2. The specific value needs to be determined based on factors such as material, specification, and use environment.
3. The manufacturer's technical specifications and safety pressure range must be strictly followed.
Key factors affecting pressure bearing capacity
Material properties:
1. Yield strength and tensile strength directly determine the pressure limit
2. Different materials (such as carbon steel and alloy steel) have significantly different performances
Specifications:
1. Wall thickness: The thicker the pipe wall, the stronger the pressure bearing capacity
2. Outer diameter: affects the stability of the pipeline structure
Use conditions
1. Temperature: High temperature will reduce the strength of the material
2. Pressure fluctuations: Frequent fluctuations can easily cause fatigue damage
Pressure level classification and safety requirements
1. Low pressure: Suitable for small boilers or low-temperature hot water systems. The safety requirements are lower, but regular inspection and maintenance are still required to ensure safe operation.
2. Medium pressure: Commonly used in industrial boilers and thermal systems. The material selection, design, installation, and maintenance of this level of pipes and valves must strictly comply with relevant specifications to prevent safety accidents such as leakage and explosion.
3. High pressure: commonly used in high-pressure thermal systems such as large power station boilers. This level has high requirements on the pressure resistance and sealing performance of the equipment, and also needs to be equipped with a complete safety valve and control system.
4. Ultra-high pressure: Mainly used in special industrial fields such as petrochemicals. This level must adopt special design, manufacturing processes, and more stringent safety management measures.
Key measures for safe use
1. Material selection and specifications
Select suitable materials according to actual working conditions (such as GB5310 high-pressure boiler tubes)
Wall thickness calculation must comply with standards such as ASME BPVC
2. Installation specifications
Follow regulatory requirements such as TSG G0001
Welding processes must be tested by flaw detection (such as radiographic testing)
3. Operation and maintenance management
Regular inspection: wall thickness measurement (ultrasonic thickness gauge), corrosion inspection
Defect handling: timely replacement of cracked and severely thinned pipes
Safety accessories: equipped with safety valve (starting pressure ≤ 1.05 times of design pressure)
4. Operation specifications
Overpressure operation is strictly prohibited (working pressure ≤ 80% of design pressure)
Starting and stopping the furnace must comply with the pressure increase/depressurization rate requirements (≤ 0.5MPa/min)
Conclusion
In conclusion, understanding the pressure bearing capacity of boiler tubes and how to ensure their safe use is essential to maintaining the stability and safety of industrial boiler systems. In practical applications, we need to consider a variety of factors to ensure that boiler tubes maintain optimal working conditions while bearing appropriate pressures.
Read more: How to Clean Boiler Tubes?
Boiler tubes pressure capacity range
1. High-pressure boiler tubes can usually withstand pressures above 6.4MPa.
2. The specific value needs to be determined based on factors such as material, specification, and use environment.
3. The manufacturer's technical specifications and safety pressure range must be strictly followed.
Key factors affecting pressure bearing capacity
Material properties:
1. Yield strength and tensile strength directly determine the pressure limit
2. Different materials (such as carbon steel and alloy steel) have significantly different performances
Specifications:
1. Wall thickness: The thicker the pipe wall, the stronger the pressure bearing capacity
2. Outer diameter: affects the stability of the pipeline structure
Use conditions
1. Temperature: High temperature will reduce the strength of the material
2. Pressure fluctuations: Frequent fluctuations can easily cause fatigue damage
Pressure level classification and safety requirements
1. Low pressure: Suitable for small boilers or low-temperature hot water systems. The safety requirements are lower, but regular inspection and maintenance are still required to ensure safe operation.
2. Medium pressure: Commonly used in industrial boilers and thermal systems. The material selection, design, installation, and maintenance of this level of pipes and valves must strictly comply with relevant specifications to prevent safety accidents such as leakage and explosion.
3. High pressure: commonly used in high-pressure thermal systems such as large power station boilers. This level has high requirements on the pressure resistance and sealing performance of the equipment, and also needs to be equipped with a complete safety valve and control system.
4. Ultra-high pressure: Mainly used in special industrial fields such as petrochemicals. This level must adopt special design, manufacturing processes, and more stringent safety management measures.
Key measures for safe use
1. Material selection and specifications
Select suitable materials according to actual working conditions (such as GB5310 high-pressure boiler tubes)
Wall thickness calculation must comply with standards such as ASME BPVC
2. Installation specifications
Follow regulatory requirements such as TSG G0001
Welding processes must be tested by flaw detection (such as radiographic testing)
3. Operation and maintenance management
Regular inspection: wall thickness measurement (ultrasonic thickness gauge), corrosion inspection
Defect handling: timely replacement of cracked and severely thinned pipes
Safety accessories: equipped with safety valve (starting pressure ≤ 1.05 times of design pressure)
4. Operation specifications
Overpressure operation is strictly prohibited (working pressure ≤ 80% of design pressure)
Starting and stopping the furnace must comply with the pressure increase/depressurization rate requirements (≤ 0.5MPa/min)
Conclusion
In conclusion, understanding the pressure bearing capacity of boiler tubes and how to ensure their safe use is essential to maintaining the stability and safety of industrial boiler systems. In practical applications, we need to consider a variety of factors to ensure that boiler tubes maintain optimal working conditions while bearing appropriate pressures.
Read more: How to Clean Boiler Tubes?
