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T91 Tube for Superheater Components
ASTM A213 T91 round tube is specially developed for high temperature boiler components such as superheaters and reheaters. With advanced chromium molybdenum alloy technology, it provides excellent strength, oxidation resistance, and durability for modern power generation equipment.
What Is Alloy Steel Pipe？
Product Definition：
Alloy steel pipe is a seamless tube manufactured from steel containing one or more alloying elements – primarily chromium (Cr) and molybdenum (Mo) – to enhance mechanical properties at elevated temperatures. Unlike carbon steel pipes, alloy steel pipes offer superior creep resistance, oxidation resistance, and thermal strength, making them the preferred choice for high-temperature and high-pressure applications in power generation, petrochemical, and boiler industries-.
Why Choose Alloy Steel Pipe Over Carbon Steel Pipe？
| Factor | Alloy Steel Pipe | Carbon Steel Pipe |
|---|---|---|
| Temperature Resistance | Up to 580°C+ | ≤350°C |
| Creep Resistance | Excellent (Cr-Mo alloying) | Poor |
| Oxidation Resistance | Good | Poor |
| Strength at High Temp | Maintains strength | Significant strength loss |
| Cost | Higher | Lower |
| Applications | Boilers, superheaters, refineries | General fluid transport, structural |
Key Characteristics：
| Feature | Description |
|---|---|
| High Temperature Strength | Chromium and molybdenum provide excellent creep resistance at elevated temperatures |
| Oxidation & Corrosion Resistance | Chromium content (1-9%) improves resistance to oxidation and high-temperature corrosion |
| Excellent Weldability | Suitable for welding with proper preheating and post-weld heat treatment (PWHT) |
| Pressure Resistance | Designed for high-pressure steam and fluid service (up to 9.8MPa+)- |
| Dimensional Stability | Maintains structural integrity under thermal cycling |
| 100% Recyclable | Environmentally friendly with no loss of properties |
Typical Applications by Industry：
| Industry | Applications | Recommended Grades |
|---|---|---|
| Power Generation | Boilers, superheaters, reheaters, steam headers, main steam pipes | 12Cr1MoVG, P22, P91, T91 |
| Pressure Vessels | Heat exchangers, reactors, separators, accumulators | P11, P22, 13CrMo4-5 |
| Petrochemical | High-temperature piping, reactors, synthesis towers, furnace tubes | P5, P9, P11, P22 |
| Oil & Gas | High-pressure pipelines, refinery equipment, cracking tubes | P5, P9, P11 |
| Nuclear Power | Reactor coolant piping, steam generators | P22, P91 |
| Chemical Processing | High-temperature process piping, heat exchanger tubes | P11, 10CrMo9-10 |
Each batch includes EN 10204 3.1 mill test certificate with full chemical and mechanical data. Third-party inspection (SGS, BV, TÜV) supported. MOQ: 5 tons, trial orders welcome.
Key Specifications – Alloy Steel Pipe / Tube
| Parameter | Specification / Range | Remarks |
|---|---|---|
| Standards | ASTM A335/ASME SA335 (pipe), ASTM A213/ASME SA213 (tube), GB/T 5310, EN 10216-2, DIN 17175 | Others on request |
| ASTM A335 (Pipe) | P1, P2, P5, P9, P11, P12, P22, P91 | Seamless ferritic alloy steel pipe for high temperature service- |
| ASTM A213 (Tube) | T1, T2, T5, T9, T11, T12, T22, T91 | Seamless ferritic alloy steel boiler & superheater tubes- |
| GB/T 5310 (China) | 15MoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 20G, 25MnG | High pressure boiler tubes- |
| EN 10216-2 | 13CrMo4-5, 10CrMo9-10, X10CrMoVNb9-1 | European pressure equipment directive- |
| DIN 17175 | 15Mo3, 13CrMo44, 10CrMo910 | German standard- |
| Outer Diameter (OD) | 10 mm – 1016 mm | Custom on request- |
| Wall Thickness | 1 mm – 120 mm | - |
| Length | 3 m, 4 m, 6 m, 9 m, 12 m, or custom cut | SRL/DRL available |
| Surface Treatment | Black, pickled, coated, painted | See Screen 8 |
| Density | 7.85 g/cm³ | – |
| Testing | Chemical analysis, tensile, hardness, impact (Charpy), flattening, hydrostatic, UT (optional) | Mill cert EN 10204 3.1 |
| Packaging | Bundled with end caps, steel straps, wooden pallet / wooden case | Seaworthy, ISPM 15 |
Wuxi Yansheng Technology Co., Ltd. – Company Profile
Wuxi Yansheng Technology Co., Ltd. is a comprehensive technology enterprise specializing in high-quality metal raw material supply and precision processing services. Located in Wuxi City, a major steel distribution center in China, the company leverages the mature industrial chain advantages of the Yangtze River Delta region to provide professional material solutions to global customers.
As a technology-driven enterprise, Yansheng Tech maintains strategic cooperation with several well-known steel mills (such as TISCO, Baosteel, JISCO, Dongfang Special Steel, etc.) and is an authorized distributor of these mills. Our main products include stainless steel (304/316/BA/EP pipe), carbon steel, silicon steel, copper, aluminum and other materials in the form of sheets, pipes, coils, as well as custom-processed parts.
Core Business Highlights:
Material Supply: We maintain sufficient stock inventory, offering 304/316 stainless steel sheets, pipes, coils, API 5L casing, electrical steel, and more. We also accept orders for special steel grades and non-standard specifications.
Precision Processing: Equipped with imported mirror polishing machines, water jet cutting machines, high-precision slitting/leveling lines, large CNC milling machines, boring machines, and more. We provide customized services including BA/EP pipe finishing, medium plate polishing, matte finishing, embossing, plasma cutting, etc.
Main Applications: Our products are widely used in industries such as solar energy, pressure vessels, boilers, electric heating equipment, petrochemicals, environmental protection machinery, pharmaceutical and food processing, and new energy vehicles.
Our processing center is located in Xishan District, Wuxi City, covering nearly 10,000 square meters, with an experienced technical and service team. We adhere to the business philosophy of "Technology First, Quality Oriented, Service Supreme" , providing 24/7 warehousing and logistics support as well as comprehensive after-sales service. Yansheng Tech is committed to being your trusted long-term partner.
Frequently Asked Questions (FAQ)
Q1. What products do you mainly supply?
We mainly supply stainless steel (304/316/BA/EP pipes), carbon steel, silicon steel, copper, aluminum, and other materials in sheets, pipes, and coils. Customized processing services are also available.
Q2. Do you have stock available?
Yes, we maintain sufficient stock for most standard specifications. For non-standard sizes, we can accept orders with reasonable lead time.
Q3. Can you provide MTC (Mill Test Certificate)?
Yes, we provide MTC for every shipment. Third-party inspection (SGS, TÜV, BV, etc.) is also available upon request.
Q4. Do you support video inspection before shipment?
Yes, we fully support video inspection. You can also arrange an agent or third party to visit our factory for on-site inspection before shipment.
Q5. What are your main export markets?
We export to Southeast Asia, the Middle East, Europe, Africa, and South America. We have rich experience in international trade and export documentation.
Q6. What payment terms do you accept?
We accept T/T (wire transfer), L/C at sight (irrevocable), and sometimes a combination of T/T deposit + L/C balance. Payment terms are negotiable based on order size and customer history.
Q7. Can you provide samples?
Yes, samples are available for most standard products. For custom sizes, we may need to produce small batch samples. Sample cost and shipping are usually borne by the customer, but can be discussed.
Q8. What is your typical lead time?
For stock items: 7–10 days after order confirmation. For custom production: 20–30 days, depending on the specification and quantity.
Q9. What quality certifications do you have?
We provide MTC with every shipment. Our partner mills are ISO9001 certified. We can also assist with third-party inspections (SGS, TÜV, BV) upon request.
Q10. How can I get a quotation?
Please send us your material grade, specification (size, thickness, length), quantity, and preferred trade term (FOB, CIF, DAP, etc.). We will reply with a detailed quotation within 24 hours.
Send Inquiry to This Supplier
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