ASTM A213 T91 boiler tube 2321

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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 are the common applications of steel pipes in the oil and gas industry?: Steel pipes are commonly used in the oil and gas industry for various applications such as drilling, transportation of crude oil and natural gas, and for constructing pipelines and storage tanks. They provide strength, durability, and resistance to corrosion, making them ideal for these critical operations.

Q: What is the difference between seamless and ERW steel pipes?: Seamless steel pipes are manufactured without any welding or seams, resulting in a uniform and continuous structure. On the other hand, ERW (Electric Resistance Welded) steel pipes are created by welding the edges of the steel strip or plate together to form a tube. This welding process can cause a visible seam along the length of the pipe. While seamless pipes are generally considered stronger and more reliable due to their uninterrupted structure, ERW pipes are more cost-effective and readily available.

Q: Can steel pipes be used for transporting sewage?: Yes, steel pipes can be used for transporting sewage. They are commonly used in sewage systems due to their durability, strength, and resistance to corrosion.

Q: What are the different types of steel pipe coatings for marine applications?: There are several types of steel pipe coatings commonly used for marine applications, including epoxy coatings, polyurethane coatings, zinc coatings, and fusion-bonded epoxy coatings. Each coating offers different benefits such as corrosion resistance, abrasion resistance, and protection against marine organisms. The choice of coating depends on factors such as the specific marine environment, the level of corrosion protection required, and the budget.

Q: What is the average lifespan of steel pipes?: The average lifespan of steel pipes varies depending on various factors such as their quality, usage, and maintenance. However, under normal conditions, well-maintained steel pipes can last for several decades or even longer.

Q: How do you calculate the flow rate of water in steel pipes?: To calculate the flow rate of water in steel pipes, you need to know the pipe diameter, length, and the pressure difference between the inlet and outlet. By using the Darcy-Weisbach equation or other relevant hydraulic formulas, you can determine the flow rate based on these parameters.

Q: Can steel pipes be coated for aesthetic purposes?: Indeed, steel pipes have the potential to be coated solely for aesthetic reasons. By applying coatings to steel pipes, not only can one achieve an attractive appearance, but also safeguard them against corrosion and other environmental influences. Numerous coating choices are at one's disposal when it comes to steel pipes, including powder coating, epoxy coating, and vinyl coating, among others. These coatings can be employed in various colors and textures to enrich the pipes' visual appeal and harmonize with their surroundings. Whether utilized in industrial settings, architectural endeavors, or for decorative purposes, the act of coating steel pipes has the power to metamorphose them into visually captivating components, all while preserving their structural integrity.

Q: What are the different methods of joining steel pipes without welding?: There are multiple ways to connect steel pipes without welding. These include: 1. Mechanical Couplings: These couplings consist of two separate pieces that attach to the pipe ends and then tighten together. They provide a secure and leak-proof connection, eliminating the need for welding. 2. Threaded Connections: This method involves threading the ends of the steel pipes to create a male and female connection. The pipes are then screwed together using pipe threads, creating a strong and dependable joint. 3. Flanged Connections: Flanges are utilized to connect steel pipes by bolting them together. The flanges have a flat surface with holes that align with corresponding holes in the opposing flange. Bolts are inserted and tightened to establish a tight seal. 4. Grooved Connections: This technique involves grooving the pipe ends and using grooved couplings to join them. The couplings have teeth that interlock with the grooves, resulting in a secure and rigid connection. 5. Compression Fittings: Compression fittings are employed to connect steel pipes by compressing a metal or plastic ring onto the outer surface of the pipe. This creates a tight seal and a reliable connection without welding. 6. Adhesive Bonding: Special adhesives designed for bonding metals can be used to connect steel pipes. The adhesive is applied to the pipe surfaces, which are then pressed together and left to cure, forming a strong and durable bond. 7. Clamping: Clamps can be used to hold steel pipes together, creating a temporary connection. This method is commonly used for testing purposes or in situations where the pipes need to be easily dismantled. Each of these methods has its own benefits and limitations, and the choice depends on various factors such as the specific application, pipe material, and required joint strength.

Q: How are steel pipes classified based on their diameter?: Steel pipes can be classified based on their diameter into various categories. The most common classification system for steel pipes is based on the nominal pipe size (NPS). NPS is a North American set of standard sizes that are used to designate the diameter of a pipe. It is expressed in inches and represents the approximate inside diameter (ID) of the pipe. Steel pipes are typically classified into three main categories based on their diameter: small bore, medium bore, and large bore. Small bore pipes typically have NPS of 2 inches and below, medium bore pipes have NPS between 2 and 24 inches, and large bore pipes have NPS greater than 24 inches. In addition to the NPS classification, steel pipes can also be classified based on their actual outside diameter (OD). This classification is used to determine the compatibility of pipes with fittings and other components. The OD classification is usually expressed in inches or millimeters. Overall, the classification of steel pipes based on their diameter provides a standardized system for easy identification and selection of pipes for various applications. It helps in ensuring compatibility, efficient installation, and effective functioning of piping systems in different industries such as construction, oil and gas, plumbing, and more.

Q: How do steel pipes handle seismic activities?: Steel pipes are highly durable and resistant to seismic activities. Their strong and flexible nature allows them to withstand the ground shaking during earthquakes without compromising their structural integrity. Steel pipes are designed to absorb and distribute the energy generated by seismic waves, minimizing the potential damage caused by earthquakes. Additionally, their high strength-to-weight ratio makes them ideal for withstanding the lateral forces and ground movements associated with seismic activities.

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