P91 Alloy Steel Seamless Pipe ASTM A335 For Column Reboiler Heater
Brand Name:YUHONG GROUP
Certification:ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:P91
Minimum Order Quantity:1PC
Delivery Time:Depends on quantity
Payment Terms:T/T, L/C at sight
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P91 Alloy Steel Seamless Pipe ASTM A335 for Column Reboiler Heater
Overview
Yuhong Group, a global leader in alloy steel pipes and heat exchanger solutions, proudly presents its P91 Alloy Steel Seamless Pipes manufactured to ASTM A335 standards. With over 20 years of export experience and clients in 80+ countries, Yuhong Group is trusted worldwide for delivering high-performance materials for demanding applications like column reboiler heaters and other high-temperature systems.
The P91 Alloy Steel Seamless Pipe is specifically designed for high-pressure, high-temperature environments, offering exceptional strength, thermal stability, and corrosion resistance. These features make it the ideal choice for column reboiler heaters used in petrochemical, refinery, and power generation industries.
Advantages of P91 Alloy Steel
P91 Alloy Steel is a high-grade chromium-molybdenum alloy, enhanced with small amounts of vanadium and nitrogen to deliver superior properties for high-temperature and high-pressure applications. Key advantages include:
| Property | Benefits |
|---|---|
| High-Temperature Strength | Exceptional creep resistance and mechanical strength at elevated temperatures. |
| Corrosion Resistance | Excellent resistance to oxidation and scaling in aggressive environments. |
| Thermal Stability | Ensures long-term reliability in thermal cycling and high-pressure systems. |
| Enhanced Weldability | Suitable for fabricating and assembling complex piping systems. |
| Prolonged Lifespan | Reduced maintenance and downtime in critical applications. |
These advantages make P91 a preferred material for column reboiler heaters and other industrial heating applications.
ASTM A335 Tolerance Range
The ASTM A335 specification governs the manufacturing and dimensional tolerances for seamless ferritic alloy steel pipes, ensuring their reliability in high-temperature applications. Below is a summary of the key tolerances:
| Parameter | Tolerance |
|---|---|
| Outer Diameter (OD) | ±1% of specified OD or ±0.5mm (whichever is greater). |
| Wall Thickness (WT) | ±12.5% of nominal wall thickness. |
| Length | Varies by order; typically ±5mm for specified lengths. |
| Straightness | Maximum deviation of 0.2% of total pipe length. |
| Weight | ±10% of specified weight per unit length. |
These strict tolerances ensure that every pipe meets the precise requirements for critical applications in column reboiler heaters and other high-temperature systems.
Other Grades of ASTM A335 Alloy Steel
In addition to P91, ASTM A335 includes a range of alloy steel grades, each designed for specific applications:
| Grade | Composition | Applications |
|---|---|---|
| P1 | Chromium-Molybdenum (low Cr) | Low-temperature and moderate-pressure applications. |
| P5 | 5% Chromium, 0.5% Molybdenum | High-temperature steam piping and chemical processing. |
| P11 | 1% Chromium, 1% Molybdenum | Boilers, superheaters, and heat exchangers. |
| P22 | 2.25% Chromium, 1% Molybdenum | Power plants, pressure vessels, and refineries. |
| P91 | 9% Chromium, 1% Molybdenum | Ultra-supercritical boilers and advanced heaters. |
P91 stands out due to its high chromium and molybdenum content, combined with vanadium and nitrogen, providing unmatched performance in extreme conditions.
Introduction to Column Reboiler Heaters
Column reboiler heaters are critical components in the petrochemical and refinery industries. They are used to heat process fluids in distillation columns, ensuring efficient separation of chemical compounds.
Function:
Reboilers transfer heat to the bottom liquid of a distillation column, converting it into vapor to maintain the distillation process.Operating Conditions:
- High Temperatures: Operating at temperatures up to 650°C (1200°F).
- High Pressures: Often handling pressures of 10-50 bar or more.
- Corrosive Environments: Exposed to aggressive chemicals and high-temperature flue gases.
The P91 Alloy Steel Seamless Pipe is perfectly suited for these demanding environments, offering superior thermal and mechanical properties to ensure reliable performance and extended service life.
Available Sizes of P91 Alloy Steel Seamless Pipes
Yuhong Group provides a wide range of sizes for P91 Seamless Pipes to cater to diverse project requirements. Below are the standard dimensions:
| Outer Diameter (OD) | Wall Thickness (WT) | Length | Type |
|---|---|---|---|
| 21.3mm (1/2") | Sch 40 / Sch 80 | Up to 12 meters (customizable) | Seamless |
| 33.4mm (1") | Sch 40 / Sch 80 | Standard or custom lengths | Seamless |
| 60.3mm (2") | Sch 40 / Sch 80 / Sch 120 | Straight lengths or U-bends | Seamless |
| 114.3mm (4") | Sch 40 / Sch 80 | Cut-to-length as needed | Seamless |
| 219.1mm (8") | Sch 40 / Sch 80 / Sch XXS | Customizable | Seamless |
Custom sizes and schedules can be provided upon request to meet specific application needs.
Conclusion
Yuhong Group’s P91 Alloy Steel Seamless Pipes are the ultimate solution for high-temperature, high-pressure applications in column reboiler heaters and other industrial systems. With exceptional strength, reliability, and adherence to ASTM A335 standards, our pipes ensure optimal performance and extended service life in the most demanding environments.
Contact us today to learn more about our P91 Alloy Steel Seamless Pipes or request a free quote. Let Yuhong Group be your trusted partner for all your alloy steel piping needs!
P91 Alloy Steel Seamless Pipe ASTM A335 For Column Reboiler Heater
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