Carbon Steel Pipes Grades P5/P9/P11/P22/P91 Manufacturer, Supplier & Exporter in India – Mcneil Instruments
Mcneil Instruments is a leading manufacturer, supplier, and exporter of Carbon Steel Pipes in India, offering dependable piping solutions for high-pressure and high-temperature industrial applications. Our product range includes ASTM A335 / ASME SA335 Carbon Grade P5, P9, P11, P22, and P91 Pipes, engineered for durability, toughness, and consistent performance in power generation, refineries, petrochemical, and thermal industries.
Manufactured with precise dimensional control and tested under rigorous quality standards, our Carbon Steel Pipes are known for strength, weldability, and corrosion resistance, ensuring reliable performance in challenging operating environments.
Grades We Offer
We are recognized as a leading manufacturer and supplier of P5, P9, P11, P22, and P91 grade Carbon Steel Pipes designed to perform in demanding environments.
P5 Pipes
P9 Pipes
P11 Pipes
P22 Pipes
P91 Pipes
ASME SA335 Grade P5 Carbon Steel Pipes
P5 Carbon Steel Pipes are built for elevated temperature and high-pressure applications, offering superior mechanical strength and thermal stability. They are widely used in refineries, chemical plants, and power stations.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 4–6%, Molybdenum 0.45–0.65% |
| Temperature Range | Up to 600°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 85 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Strong resistance to oxidation and corrosion
- Reliable for steam lines and pressure systems
- Ideal for boilers, heaters, and high-pressure piping
ASME SA335 Grade P9 Carbon Steel Pipes
P9 Carbon Steel Pipes provide excellent strength, creep resistance, and dimensional stability at elevated temperatures. They are ideal for steam systems, refinery heaters, and power plants.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 8–10%, Molybdenum 0.9–1.1% |
| Temperature Range | Up to 650°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 90 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Excellent mechanical stability under high heat
- Superior oxidation and scaling resistance
- Used in heat exchangers, superheaters, and pipelines
ASME SA335 Grade P11 Carbon Steel Pipes
P11 Carbon Steel Pipes are known for their balance of ductility, strength, and corrosion resistance, making them ideal for steam lines, chemical plants, and power generation units.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 1–1.5%, Molybdenum 0.44–0.65% |
| Temperature Range | Up to 600°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 85 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- High weldability and structural integrity
- Resistant to oxidation and scaling
- Suitable for heat exchangers and pressure vessels
ASME SA335 Grade P22 Carbon Steel Pipes
P22 Carbon Steel Pipes combine toughness with superior fatigue resistance, making them a go-to choice for boiler systems, refineries, and high-pressure piping.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 1.9–2.6%, Molybdenum 0.87–1.13% |
| Temperature Range | Up to 650°C |
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 205 MPa |
| Hardness | ≤ 90 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Excellent creep and fatigue resistance
- Long life under cyclic temperature exposure
- Perfect for reheaters, boilers, and heat exchangers
ASME SA335 Grade P91 Carbon Steel Pipes
P91 Carbon Steel Pipes are high-performance pipes designed for extreme temperature and pressure. The addition of chromium, molybdenum, vanadium, and niobium provides exceptional strength, creep resistance, and oxidation stability.
✅ Technical Specification
| Parameter | Specification |
| Composition | Chromium 8–9.5%, Molybdenum 0.85–1.05%, Vanadium & Niobium |
| Temperature Range | Up to 700°C |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength | ≥ 440 MPa |
| Hardness | ≤ 100 HRB |
| Standards | ASTM A335 / ASME SA335 |
Key Highlights:
- Outstanding mechanical strength and long-term stability
- Resistant to oxidation and high-temperature fatigue
- Used in turbines, boilers, and ultra-high-pressure systems
Why Choose Mcneil Instruments?
✔ ISO/CE-certified production with strict quality assurance
✔ Precision manufacturing ensuring perfect dimensional accuracy
✔ Custom wall thicknesses and pressure ratings available
✔ 100% material traceability with MTC certification
✔ Global export-ready packaging and timely delivery
Applications Across Industries
🔹 Power Generation: Steam lines and turbine systems
🔹 Oil & Gas: High-pressure pipelines and refinery setups
🔹 Petrochemical: Process heaters and reactors
🔹 Boilers: Superheater and reheater tubing
🔹 Thermal Power Plants: High-temperature applications
🔹 Industrial Furnaces: Resistance to oxidation at high heat
Contact Us
Looking for premium Carbon Steel Pipes in India?
Mcneil Instruments supplies P5, P9, P11, P22, and P91 Carbon Steel Pipes that guarantee strength, reliability, and high-temperature performance.
📞 Contact us today for expert consultation, project-based specifications, and competitive quotes tailored to your industry needs.
FAQs
What are Carbon Steel Pipes used for?
Carbon Steel Pipes are primarily used in high-temperature and high-pressure applications like power plants, refineries, petrochemical plants, and boilers due to their strength, corrosion resistance, and durability.
What standards do Mcneil Instruments’ Carbon Steel Pipes follow?
All our pipes comply with ASTM A335 / ASME SA335 standards, ensuring consistency, high performance, and suitability for industrial-grade applications.
What makes Grade P5 Carbon Steel Pipes unique?
P5 pipes have excellent oxidation and corrosion resistance and maintain stability under temperatures up to 600°C, making them ideal for steam lines, pressure systems, and heaters.
How is Grade P9 Carbon Steel different from P5?
P9 pipes contain higher chromium and molybdenum content, offering better creep resistance and scaling protection at temperatures up to 650°C, perfect for superheaters and power generation units.
Why is Grade P11 Carbon Steel preferred in power generation?
P11 pipes provide a balance between ductility, strength, and weldability, ensuring dependable performance in heat exchangers, chemical plants, and pressure vessels.
What are the benefits of using Grade P22 Carbon Steel Pipes?
P22 pipes are known for creep and fatigue resistance, enabling long service life under cyclic temperature conditions common in boiler systems and reheaters.
What makes Grade P91 Carbon Steel Pipes suitable for extreme environments?
P91 pipes combine chromium, molybdenum, vanadium, and niobium to deliver superior strength, high-temperature fatigue resistance, and oxidation stability, making them ideal for ultra-high-pressure systems and turbines.