ASTM A213 T91 boiler tube 5698

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Loading Port:: Shanghai

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Supply Capability:: 30000 kg/month

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T91 alloy pipe is America national tree like ridge and America combustion new martensitic heat-resistant steel engineering company metallurgical materials laboratory research work. It is to reduce the carbon content of 9Cr1MoV steel on the basis of the content of sulphur, phosphorus, strictly limit the vanadium, niobium, adding small amount of alloying elements.

The number of K90901 T91 alloy tube

T91 alloy tube

T91 alloy pipe specifications: 8-1240 x 1-200mm

Overview of T91 alloy tube:

T91 alloy tubes for ferrite and Olympic alloy steel seamless steel tube boiler, overheating and heat exchanger belongs to (ASTM A213 / A213M-07a)

Use:

For low and medium pressure boiler (work pressure is generally not more than 5.88Mpa, the operating temperature at 450 DEG C) of the heating surface tube; used for high pressure boiler (work pressure is generally above 9.8Mpa, operate at a temperature of 450 DEG to 650 DEG C between) the heating surface tubes, economizer, superheater, reheater, petrochemical industrial pipe.

Heat treatment of T91 alloy tube:

The final heat of T91 treatment for normalizing and high temperature tempering, normalizing temperature 1040 C, the holding time of not less than 10 min, the tempering temperature is 730 to 780 DEG C, the heat preservation time is not less than 1h, the final heat treatment on Microstructure of tempered martensite

Q: What is the role of steel pipes in the mining and extraction of minerals?: The mining and extraction of minerals heavily rely on steel pipes, which have a vital role to play. These pipes are extensively utilized in diverse mining operations for the transportation of fluids like water and slurry. Moreover, they are employed to offer structural reinforcement and ventilation within underground mines. A fundamental application of steel pipes in mining is the transportation of water and slurry. Water is an essential component in the mining process, serving purposes such as dust suppression, ore processing, and site rehabilitation. The creation of a pipeline network using steel pipes enables the efficient transfer of water from its source, such as a reservoir or dam, to various areas within the mine. Similarly, slurry, a mixture of crushed minerals and water, is frequently conveyed through steel pipes to processing plants or tailings dams. Structural support is another critical function fulfilled by steel pipes in underground mines. The extraction of valuable mineral deposits necessitates the construction of tunnels and shafts. To endure the immense pressure exerted by the surrounding rock and prevent collapses, these underground excavations require reinforcement. Steel pipes, acting as support structures like roof bolts and rock bolts, strengthen the walls and roofs of these tunnels and shafts, thereby ensuring miner safety and maintaining the stability of the mine structure. Furthermore, steel pipes are employed in ventilation systems within underground mines. Proper ventilation is vital for mining operations, ensuring a continuous supply of fresh air, removal of harmful gases, and control of temperature and humidity levels. Steel pipes are utilized to create ventilation shafts and ducts, facilitating the smooth flow of air throughout the mine. This aids in preventing the accumulation of toxic gases, dust, and excessive heat, thereby maintaining a safe and healthy working environment for miners. To summarize, steel pipes are indispensable for the mining and extraction of minerals. They facilitate the transportation of fluids, offer structural reinforcement in underground mines, and contribute to efficient ventilation systems. The absence of steel pipes would significantly impede the efficient and safe extraction of minerals from mines.

Q: How are steel pipes used in the construction of telecommunications towers?: Steel pipes are commonly used in the construction of telecommunications towers as they provide a strong and durable framework for supporting the tower structure. These pipes are used to create the main mast or tower structure, providing stability and strength to withstand various weather conditions. Additionally, steel pipes are often used for mounting antennas and other equipment on the tower, ensuring secure installation and efficient signal transmission.

Q: ASME seamless tube how to express, what is the form, I did not find on the ASME, thank God!: You can refer to the ASME B31.10, such as the requirements for the SA106GRB seamless steel tube outer diameter of 168.3 x 7.11, specifications can be marked as NPS6 SCH40 SMLS, the real mark should include pressure steel pipe factory name or trademark, and the material level, specifications, standards, wall number, batch number, pressure test (if any), NDE detection (if any)

Q: What is the pressure rating of steel pipes?: The pressure rating of steel pipes can vary depending on factors such as the size, wall thickness, and specific grade of the steel used. However, steel pipes are commonly available in pressure ratings ranging from a few hundred PSI (pounds per square inch) to several thousand PSI, making them suitable for a wide range of applications.

Q: How are steel pipes cleaned and maintained?: Steel pipes are cleaned and maintained through a combination of mechanical and chemical methods. Mechanical cleaning involves removing any loose debris or scale using tools like wire brushes or high-pressure water jets. Chemical cleaning may be used to dissolve any stubborn deposits or corrosion using suitable solvents or acids. Regular inspection and maintenance are essential to identify and address any potential issues such as leaks, rust, or structural damage. Coatings, such as paint or anti-corrosion materials, are often applied to protect steel pipes from environmental factors and extend their lifespan.

Q: What are the alternatives to steel pipes for various applications?: There are several alternatives to steel pipes for various applications. Some common alternatives include pipes made from materials such as plastic (polyvinyl chloride or PVC), copper, cast iron, and ductile iron. Each alternative offers different benefits and drawbacks depending on the specific application, cost, durability, and environmental considerations.

Q: What are the different sizes of steel pipes available?: Steel pipes are available in a wide range of sizes, varying from small diameter pipes used for plumbing applications to large diameter pipes used for industrial purposes. The sizes typically range from 1/8 inch to 72 inches in diameter, with various wall thickness options.

Q: What is the thermal expansion coefficient of steel pipes?: The thermal expansion coefficient of steel pipes varies depending on the specific type of steel used, as well as the temperature range in which the expansion is being measured. However, on average, the thermal expansion coefficient of steel pipes ranges from 10-14 x 10^-6 per degree Celsius (10-14 μm/m°C). This means that for every degree Celsius increase in temperature, the length of a steel pipe will expand by approximately 10-14 μm per meter of length. It is important to note that this value is an average and can vary slightly depending on the specific composition and treatment of the steel used in the pipe.

Q: Can steel pipes be used for aboveground applications?: Steel pipes have the capability to be utilized in aboveground applications. Their strength, durability, and resistance to corrosion are well-known attributes, making them suitable for a variety of aboveground uses. Industries such as construction, oil and gas, water transportation, and infrastructure development often rely on steel pipes. Aboveground applications for steel pipes include structural supports, handrails, fencing, scaffolding, outdoor pipelines, and various other outdoor structures. Furthermore, steel pipes can undergo coating or painting processes to provide additional protection against weather conditions and enhance their aesthetic appearance. All in all, steel pipes offer versatility for aboveground applications due to their dependable nature and long-lasting performance.

Q: How are steel pipes used in the manufacturing of boilers?: Steel pipes are an integral component in the manufacturing of boilers due to their strength, durability, and heat-resistant properties. Boilers are used to generate steam or heat water for various industrial and commercial applications. Steel pipes are primarily used in the construction of boiler tubes, which serve as the main heat transfer medium. These tubes are subjected to high temperatures and pressure, making it crucial to use a material that can withstand these extreme conditions. Steel, with its excellent mechanical properties and resistance to corrosion, is the ideal material for this purpose. The manufacturing process of boilers involves forming the steel pipes into specific shapes and sizes to create the boiler tubes. These tubes are then connected to form a network of channels through which hot gases or water flow. The steel pipes used in this process are often seamless or welded, depending on the requirements of the boiler design. The steel pipes used in boilers must meet stringent quality standards to ensure the safety and efficiency of the system. They are tested for their ability to withstand high pressure, temperature, and corrosion. Additionally, they undergo various inspections and tests, such as ultrasonic testing and radiographic examination, to detect any defects or flaws that could compromise the boiler's performance. In summary, steel pipes play a crucial role in the manufacturing of boilers by serving as the primary material for boiler tubes. Their strength, durability, and heat-resistant properties make them suitable for withstanding high temperatures and pressure. These pipes undergo rigorous testing to ensure their quality and reliability in creating efficient and safe boiler systems.

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