Description
Product Description
ASTM A335 seamless pipe, commonly referred to as Chrome Moly pipes, are high-quality ferritic alloy steel pipes designed specifically for high-temperature and high-pressure service applications. These pipes are ideal for use in industries such as power generation, petrochemical plants, oil refineries, and other sectors requiring durable and high-performance piping solutions. Their seamless construction ensures exceptional reliability, structural integrity, and resistance to harsh environmental conditions. Manufactured under stringent quality control measures, ASTM A335 pipes comply with global standards and provide excellent performance even under extreme conditions. Manufactured to stringent ASTM standards, these pipes offer exceptional durability, high strength, and excellent resistance to corrosion and oxidation. Available in various grades such as P5, P9, P11, P22, and P91, our seamless pipes ensure reliable performance in extreme environments.
ASTM A335 seamless pipe Types
ASTM A335 seamless pipes are available in various grades, each designed for specific industrial applications:
- P5: Contains 4.00–6.00% chromium and 0.45–0.65% molybdenum. This grade is ideal for refineries and petrochemical plants due to its high-temperature strength and oxidation resistance.
- P9: Comprises 8.00–10.00% chromium and 0.90–1.10% molybdenum. Suitable for high-temperature applications in the chemical and petroleum industries.
- P11: Features 1.00–1.50% chromium and 0.44–0.65% molybdenum. Commonly used in power plants and boiler systems, balancing strength and cost-effectiveness.
- P22: Contains 1.90–2.60% chromium and 0.87–1.13% molybdenum. Preferred for high-pressure and high-temperature applications, such as steam pipelines.
- P91: Comprises 8.00–9.50% chromium and 0.85–1.05% molybdenum, with additional elements for enhanced creep strength. Commonly used in advanced power plant systems and critical applications requiring superior strength.
ASTM A335 seamless pipe Key Features
- High-Temperature Resistance:
- The chromium and molybdenum content provides exceptional resistance to oxidation, deformation, and creep under elevated temperatures.
- Corrosion Resistance:
- Chromium improves the pipe’s ability to resist oxidation, pitting, and stress corrosion cracking, making it ideal for harsh industrial environments.
- Excellent Strength & Toughness:
- High tensile and yield strength ensure durability and performance under extreme pressure conditions.
- Good Fabrication Properties:
- These pipes can be easily formed, bent, welded, and machined, allowing for flexibility in various applications.
- Longevity & Reliability:
- The combination of chemical and mechanical properties ensures a longer service life, reducing replacement and maintenance costs.
- Low Thermal Expansion:
- Reduces stress and deformation under temperature fluctuations, ensuring dimensional stability.
- Uniform Wall Thickness:
- Ensures consistent performance, high strength, and resistance to deformation throughout the pipe length.
- Seamless Construction:
- Eliminates weak points and weld seams, improving pressure resistance and overall reliability.
- High Wear & Abrasion Resistance:
- Ensures durability in environments with high mechanical stress and corrosive exposure.
ASTM A335 seamless pipe Technical Specification
ASTM A335 pipes are seamless, meaning they do not have welded joints, making them stronger and more reliable under high-pressure and high-temperature conditions. These pipes are primarily composed of chromium and molybdenum, which enhance their strength, oxidation resistance, and mechanical properties.
- Standard: ASTM A335 / ASME SA335
- Manufacturing Process: Hot-rolled or cold-drawn
- Surface Treatment: Black, bare, varnish coated, galvanized, anti-rust oil, epoxy coating, pickled and oiled
- End Types: Plain end, beveled end, threaded end, grooved end, socket weld end
- Heat Treatment: Normalizing, tempering, quenching, annealing, stress relieving, induction hardening
- Testing: Hydrostatic testing, ultrasonic testing, radiographic testing, mechanical testing, non-destructive testing (NDT), eddy current testing
- Certification: Mill Test Certificate (MTC) as per EN 10204 3.1/3.2, third-party inspection.
ASTM A335 seamless pipe Chemical Composite
| Element | Grade P5 | Grade P9 | Grade P11 | Grade P22 | Grade P91 |
|---|---|---|---|---|---|
| Carbon (C) | 0.15 max | 0.15 max | 0.05-0.15 | 0.05-0.15 | 0.08-0.12 |
| Manganese (Mn) | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| Phosphorus (P) | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.020 max |
| Sulfur (S) | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.010 max |
| Silicon (Si) | 0.50 max | 0.25-1.00 | 0.50-1.00 | 0.50 max | 0.20-0.50 |
| Chromium (Cr) | 4.00-6.00 | 8.00-10.00 | 1.00-1.50 | 1.90-2.60 | 8.00-9.50 |
| Molybdenum (Mo) | 0.45-0.65 | 0.90-1.10 | 0.44-0.65 | 0.87-1.13 | 0.85-1.05 |
| Vanadium (V) | - | - | - | - | 0.18-0.25 |
| Nickel (Ni) | - | - | - | - | 0.85-1.05 |
| Nitrogen (N) | - | - | - | - | 0.030-0.070 |
ASTM A335 seamless pipe Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRC) |
|---|---|---|---|---|
| P5 | 415 min | 205 min | 30 min | 60 max |
| P9 | 415 min | 205 min | 30 min | 60 max |
| P11 | 415 min | 205 min | 30 min | 85 max |
| P22 | 415 min | 205 min | 30 min | 85 max |
| P91 | 585 min | 415 min | 20 min | 85 max |
ASTM A335 seamless pipe Dimensional Range
- Outer Diameter: 1/8″ to 24″ (6mm to 610mm)
- Wall Thickness: SCH 20, SCH 40, SCH 80, SCH 160, XXS
- Length: Single random, double random, or custom-cut lengths
- End Types: Plain end, beveled end, threaded end, grooved end, socket weld end
- Tolerances: As per ASTM A999/A999M
Additional Benefits of ASTM A335 seamless pipe
- High Resistance to Wear & Tear:
- Ensures extended service life in demanding environments.
- Excellent Weldability:
- Allows for easy fabrication and joining in various industrial applications.
- Low Maintenance Requirements:
- Reduces operational costs by requiring minimal upkeep.
- High Fatigue Strength:
- Capable of withstanding cyclic loading and fluctuating stress conditions.
- Superior Heat Dissipation:
- Maintains structural stability and mechanical integrity under thermal stress.
- Adaptability to Various Environmental Conditions:
- Performs well in extreme temperatures, corrosive media, and high-pressure environments.
- Efficient Fluid Transportation:
- Smooth inner surface minimizes pressure drops and enhances flow efficiency.
- Resistant to Hydrogen Embrittlement & Sulfidation:
- Ideal for harsh industrial processing applications.
- Enhanced Safety:
- These pipes provide high tensile strength, which ensures safety in high-pressure systems and environments where failure could result in significant risks.
- Versatility:
- They are suitable for various industries, including power generation, petrochemical plants, oil refineries, and more.
- Cost Efficiency:
- Due to their long service life and reduced maintenance requirements, these pipes are a cost-effective solution in the long run.
- Durability:
- The high wear and abrasion resistance ensure that the pipes maintain their structural integrity in demanding conditions.
Application of ASTM A335 seamless pipe
- Power Generation Plants: Used in steam turbines, superheaters, reheaters, and boiler components to handle high temperatures and pressures.
- Petrochemical Industry: Suitable for high-temperature fluid transportation, catalytic cracking, and refinery processes.
- Oil & Gas Industry: Utilized in catalytic reforming units, gas processing plants, hydrocrackers, and high-pressure drilling systems.
- Industrial Boilers & Heat Exchangers: Designed for use in heat exchanger tubes, superheater tubes, and economizers.
- Aerospace & Mechanical Engineering: Used in high-performance mechanical systems requiring excellent heat resistance and strength.
- Chemical Processing Plants: Ideal for transporting corrosive substances at high temperatures and pressure.
- Automotive Industry: Used in exhaust systems, high-pressure fuel lines, and performance engine components.
- Nuclear Power Plants: Withstands extreme temperature conditions in nuclear reactor cooling systems.
Conclusion
In conclusion, ASTM A335 seamless pipes (Chrome Moly pipes) are robust and reliable solutions for high-temperature, high-pressure, and corrosive environments. Their superior strength, corrosion resistance, and durability make them an ideal choice for critical industrial applications. With a seamless construction that eliminates weak points and improves pressure resistance, these pipes provide exceptional performance in demanding applications. Whether for power generation, petrochemical plants, or oil refineries, ASTM A335 pipes deliver longevity, strength, and high reliability.
Key Takeaways:
- Versatile & Customizable: Available in various grades and dimensions for different applications.
- High Performance: Designed to perform under high-pressure, high-temperature, and corrosive conditions.
- Durable & Cost-Effective: Excellent wear resistance and longevity reduce maintenance and replacement costs.
ASTM A335 pipes are a dependable and high-performing choice across industries, offering a durable and efficient piping solution.
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