|
| ブランド名: | YUHONG |
| MOQ: | 200-500kgs |
| 価格: | 交渉可能 |
| 支払条件: | L/C,T/T,AT ビジョン |
| 供給能力: | クライアントの要件に応じて |
ASTM A335 P9 11Cr serrated finned tube is essentially a high-efficiency heat transfer tube specifically engineered for extremely hot and high-pressure operating environments.
Its base material is ASTM A335 P9 grade chromium-molybdenum alloy steel, which contains 9% chromium (Cr) and 1% molybdenum (Mo). These two alloying elements act like a reliable protective layer for the tube, preventing it from rusting or oxidizing under high temperatures, and avoiding cracks caused by repeated heating and cooling cycles. This gives the tube exceptional durability in harsh conditions.
The most distinctive feature of this tube lies in the serrated fins attached to its outer surface. These fins, which look like small, jagged "wings", dramatically increase the tube’s surface area that comes into contact with heat. Compared to smooth tubes of the same size, this design can boost heat transfer efficiency by up to 30%, helping industrial equipment save a significant amount of energy during operation.
This tube can withstand temperatures as high as 650°C . It performs stably even in corrosive and high-stress settings, making it an ideal choice for key heat transfer equipment in oil refineries, power plants, steel mills and other heavy industries. Common applications include heat exchangers, reformers and industrial boilers.
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Mo |
|
Range |
0.15 max |
0.30–0.60 |
0.025 |
0.025 |
0.25–1.00 |
8.00–10.00 |
0.90–1.10 |
Mechanical Properties (Base Tube):
|
Tensile Strength |
Yield Strength |
Elongation |
|
≥ 415 MPa (60 ksi) |
≥ 205 MPa (30 ksi) |
≥ 30% |
1.ASTM A335 P9 vs. ASME SA209 T1A:
Temperature Capability: ASTM A335 P9 (9Cr-1Mo) has a higher temperature resistance, capable of withstanding up to 650°C, while ASME SA209 T1a (C-0.5Mo) is suitable for temperatures up to 480°C.
Application: P9 is preferred for high-temperature corrosive gas services such as cracking furnaces, while SA209 T1a is more suited for medium-temperature heat recovery in less aggressive environments.
2.11CR Serrated Fins vs. Aluminum Embedded Fins:
Performance in High-Temperature Environments: 11CR serrated fins are designed to withstand higher temperatures (up to 650°C), offering superior durability in high-temperature, corrosive environments. In contrast, aluminum fins (typically used in systems with temperatures below 260°C) are prone to corrosion and melting in extreme conditions.
Corrosion Resistance: 11CR serrated fins are more resistant to oxidation and sulfidation, making them ideal for high-temperature, corrosive applications.
· Petrochemical Cracking Furnaces: Used in the convection sections of ethylene and steam cracking furnaces, where hot, corrosive gases require efficient heat recovery.
· Refinery Fired Heaters: Common in crude heaters, vacuum heaters, and coker heaters, especially when processing high-sulfur feedstocks.
· Syngas & Coal Gasification Waste Heat Boilers: Applied in heat recovery surfaces handling hot, particulate-laden synthesis gas containing corrosive components.
· High-Temperature Waste Heat Recovery: Utilized in metallurgical, glass, and cement plants, where exhaust gases are both high-temperature and dirty.
· Power Generation: Specific applications in advanced power cycles, where efficient heat recovery from challenging fuel sources is crucial.
Q1: What industries use ASTM A335 P9 11CR Serrated Fin Tubes?
ASTM A335 P9 11CR Serrated Fin Tubes are widely used in industries like petrochemical, power generation, and metallurgy, particularly in applications involving high temperatures and corrosive gases.
Q2: How do serrated fin tubes compare to smooth tubes?
Serrated fin tubes provide up to 30% more surface area compared to smooth tubes, enhancing heat transfer efficiency and making them ideal for high-performance heat exchangers and systems in extreme environments.
Q3: What is the maximum temperature that ASTM A335 P9 tubes can handle?
These tubes are designed to withstand temperatures up to 650°C, making them suitable for the most demanding high-temperature applications.
Q4: Can ASTM A335 P9 tubes be used in corrosive environments?
Yes, ASTM A335 P9 tubes offer excellent corrosion resistance, particularly against oxidation and sulfidation, making them ideal for use in high-temperature, corrosive environments.
