In the grand vision of industrial production and energy conversion, seamless boiler tubes have become an indispensable cornerstone of many industries with their excellent performance, unparalleled reliability and efficient application value. This is not just a choice of material, but also a practice of the dual commitment to safety and efficiency. Seamless boiler tubes are widely used in the petrochemical industry, and their material properties, manufacturing processes and application areas have unique requirements and standards.
What is seamless boiler tube?
Seamless boiler tube, as a special type of seamless steel tube, is specially used in boilers and related piping systems in high temperature and high pressure environments. Its biggest feature is that there is no weld on the tube wall. It is made of a whole piece of metal through perforation, rolling and other processes, which gives it higher strength and reliability, and can better withstand high temperature, high pressure and medium corrosion. According to the pressure level, seamless boiler tubes are mainly divided into low and medium pressure boiler tubes and high pressure boiler tubes.
Material properties of seamless boiler tubes
From the material point of view, seamless boiler tubes include high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel.
1. High endurance strength: Steel pipes need to withstand high temperature and high pressure working environments, so they are required to have high endurance strength to ensure stability in long-term operation.
2. Good anti-oxidation performance: Under the action of high-temperature flue gas and water vapor, steel pipes will oxidize and corrode, so they need to have good anti-oxidation performance.
3. Organization stability: The steel pipe should maintain good organizational stability at high temperatures to prevent material performance degradation.
4. Corrosion resistance: Seamless boiler tubes are often exposed to various chemical media in the petrochemical industry, so they need to have good corrosion resistance.
5. Good welding performance: Seamless boiler tubes need to be welded during the manufacturing process, so they are required to have good welding performance.
Manufacturing process of seamless boiler tubes
Smelting: Arc furnace, LF furnace and VD furnace are used for smelting to ensure the chemical composition and purity of molten steel.
Billet manufacturing: Billets are usually manufactured by forging or continuous casting and rolling to ensure surface quality and internal structure.
Hot rolling or cold drawing: Steel pipes can be formed by hot rolling or cold drawing as needed to obtain the required size and shape.
Heat treatment: Heat treatment is a key process and has an important impact on the intrinsic quality and surface quality of seamless steel pipes, especially alloy seamless steel pipes and high-pressure boiler pipes.
Nondestructive testing: Steel pipes need to undergo nondestructive testing such as eddy current flaw detection and ultrasonic flaw detection during the production process to ensure product quality.
Application fields of seamless boiler tubes
The application areas of seamless boiler tubes in the petrochemical industry include:
High-pressure boilers: used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam pipes, etc. for high-pressure and ultra-high-pressure boilers.
Petrochemical equipment: used to manufacture pipelines, reactors, heat exchangers, etc. in petrochemical equipment.
Oil refinery: In oil refineries, seamless boiler tubes are used to transport high temperature and high pressure petroleum and chemical products.
Fertilizer equipment: In the fertilizer production process, seamless boiler tube are used to manufacture high-pressure fertilizer pipes.
Marine engineering: In marine engineering, seamless boiler tubes are used to manufacture structural parts and piping systems of offshore platforms.
What is seamless boiler tube?
Seamless boiler tube, as a special type of seamless steel tube, is specially used in boilers and related piping systems in high temperature and high pressure environments. Its biggest feature is that there is no weld on the tube wall. It is made of a whole piece of metal through perforation, rolling and other processes, which gives it higher strength and reliability, and can better withstand high temperature, high pressure and medium corrosion. According to the pressure level, seamless boiler tubes are mainly divided into low and medium pressure boiler tubes and high pressure boiler tubes.
Material properties of seamless boiler tubes
From the material point of view, seamless boiler tubes include high-quality carbon structural steel, alloy structural steel and stainless heat-resistant steel.
1. High endurance strength: Steel pipes need to withstand high temperature and high pressure working environments, so they are required to have high endurance strength to ensure stability in long-term operation.
2. Good anti-oxidation performance: Under the action of high-temperature flue gas and water vapor, steel pipes will oxidize and corrode, so they need to have good anti-oxidation performance.
3. Organization stability: The steel pipe should maintain good organizational stability at high temperatures to prevent material performance degradation.
4. Corrosion resistance: Seamless boiler tubes are often exposed to various chemical media in the petrochemical industry, so they need to have good corrosion resistance.
5. Good welding performance: Seamless boiler tubes need to be welded during the manufacturing process, so they are required to have good welding performance.
Manufacturing process of seamless boiler tubes
Smelting: Arc furnace, LF furnace and VD furnace are used for smelting to ensure the chemical composition and purity of molten steel.
Billet manufacturing: Billets are usually manufactured by forging or continuous casting and rolling to ensure surface quality and internal structure.
Hot rolling or cold drawing: Steel pipes can be formed by hot rolling or cold drawing as needed to obtain the required size and shape.
Heat treatment: Heat treatment is a key process and has an important impact on the intrinsic quality and surface quality of seamless steel pipes, especially alloy seamless steel pipes and high-pressure boiler pipes.
Nondestructive testing: Steel pipes need to undergo nondestructive testing such as eddy current flaw detection and ultrasonic flaw detection during the production process to ensure product quality.
Application fields of seamless boiler tubes
The application areas of seamless boiler tubes in the petrochemical industry include:
High-pressure boilers: used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam pipes, etc. for high-pressure and ultra-high-pressure boilers.
Petrochemical equipment: used to manufacture pipelines, reactors, heat exchangers, etc. in petrochemical equipment.
Oil refinery: In oil refineries, seamless boiler tubes are used to transport high temperature and high pressure petroleum and chemical products.
Fertilizer equipment: In the fertilizer production process, seamless boiler tube are used to manufacture high-pressure fertilizer pipes.
Marine engineering: In marine engineering, seamless boiler tubes are used to manufacture structural parts and piping systems of offshore platforms.
