High Pressure S335, A335, P91, P22, and P36 Alloy Seamless Steel Pipes for Boiler Heat Exchange.
We are proud to offer exceptional quality at competitive prices, making us one of the most reliable suppliers in the market. Our commitment to honesty, transparency, and professionalism drives every interaction with our clients. We warmly welcome visitors from around the world to visit, collaborate, and explore opportunities with us. As a pragmatic and innovative company, we continuously develop new products, improve quality, enhance durability, and deliver high-quality, cost-effective solutions to meet your needs. A335 P9 Alloy Steel Pipe – ASTM A335/ASME SA335 Gr. P5, P9, P11, P22, P91 Standards: ASTM A335 The A335 P9 Alloy Steel Pipe is a type of seamless pipe made from "chrome-moly" steel, known for its excellent resistance to corrosion and superior tensile strength at high temperatures. These pipes are widely used in power generation and the downstream oil and gas industry. Specifically, ASTM A335 P11, P22, and P91 are commonly found in power plants, while P5 and P9 grades are more suitable for refinery applications. What defines an alloy pipe?
Alloy pipes contain higher percentages of alloying elements compared to standard carbon steel pipes. Common elements include Molybdenum (Mo), Chromium (Cr), and Nickel. The ASTM A335 standard covers low-alloy steel pipes, which typically have less than 5% total alloy content. When the percentage of alloying elements increases, the material becomes a higher alloy, such as stainless steel, duplex, or even superalloys like Inconel, Hastelloy, and Monel. Alloy steel pipes are essential in the energy sector for use in high-temperature environments, cryogenic conditions, and high-pressure systems. Their unique properties make them ideal for critical industrial applications where performance and reliability are crucial. Key Alloying Elements and Their Roles: 1. Molybdenum (Moly): Enhances strength, elastic limit, wear resistance, impact qualities, and hardenability. It also improves resistance to softening and reduces embrittlement in chromium steels. 2. Chromium (Cr): Prevents oxidation at high temperatures and boosts corrosion resistance. It also improves tensile, yield, and hardness properties at room temperature. 3. Aluminum: Helps remove oxygen during the steelmaking process. 4. Boron: Promotes fine grain structure and increases hardness. 5. Cobalt: Enhances heat and wear resistance. 6. Manganese: Improves hardenability of the steel. 7. Nickel: Increases toughness, hardenability, and impact strength at low temperatures. 8. Silicon: Reduces oxygen content and enhances hardenability and toughness. 9. Titanium: Prevents the formation of chromium carbides. 10. Tungsten: Refines grain size and increases hardness, especially at high temperatures. 11. Vanadium: Enhances fatigue resistance of the steel. In summary, low-alloy steels contain less than 5% total alloying elements, while high-alloy steels have a much higher concentration. This distinction determines their suitability for various industrial applications, from boiler systems to extreme environments in the energy and manufacturing sectors. Steel Roller,Carbon Steel Cooling Roller,Vacuum Adsorption Roller,Alloy Steel Conductive Roller Jiangyin Mingda Rubber Roller Co,Ltd , https://www.mingdaroller.com
Grades: P1, P2, P5, P9, P11, P91, P92
Outer Diameter (OD): 10.3–660 mm
Wall Thickness (WT): 1.6–60 mm
Length: 5.8 m – 12 m or random length
Heat Treatment: Quenching & Tempering
Applications: Gas and coal power plants, headers, steam lines, feedwater pipes, superheaters, and reheaters.