Chrome Moly Pipes Grades P5/P9/P11/P22/P91 Manufacturer, Supplier & Exporter in India – Mcneil Instruments
Mcneil Instruments is a reputed manufacturer, supplier, and exporter of Chrome Moly Pipes in India, delivering robust and high-performance piping solutions built for high-temperature and high-pressure environments. Our range includes ASME SA335 / ASTM A335 P5, P9, P11, P22, and P91 Chrome Moly Pipes, trusted across power plants, refineries, petrochemical units, and energy sectors.
Manufactured to meet international standards with precise dimensional accuracy, these pipes combine strength, thermal stability, and corrosion resistance, ensuring safe and efficient performance under the most demanding industrial conditions.
Grades We Offer
We are recognized as a leading manufacturer and supplier of P5, P9, P11, P22, and P91 grade chrome moly pipes designed to perform in demanding environments. We supply seamless alloy steel pipes in the following ASTM A335 grades:
P5 Pipes
P9 Pipes
P11 Pipes
P22 Pipes
P91 Pipes
ASME SA335 Grade P5 Chrome Moly Pipes
P5 Chrome Moly Pipes are designed for elevated temperature applications, offering excellent oxidation resistance and mechanical strength. They’re ideal for heat exchangers, superheaters, and boilers used in refineries and power plants.
✅ 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:
- Excellent resistance to scaling and oxidation
- High strength for elevated temperature service
- Commonly used in boilers, heat exchangers, and pressure vessels
ASME SA335 Grade P9 Chrome Moly Pipes
P9 Chrome Moly Pipes are known for their outstanding creep strength and stability under high pressure. Their composition makes them suitable for industrial furnaces, refineries, and steam systems where durability and temperature tolerance are critical.
✅ 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 performance under prolonged high-temperature exposure
- Resistant to thermal fatigue and oxidation
- Used in superheater tubes, furnaces, and refinery piping
ASME SA335 Grade P11 Chrome Moly Pipes
P11 Chrome Moly Pipes offer a balanced mix of strength, ductility, and weldability, making them a reliable choice for steam lines, pressure vessels, and heat exchangers. They maintain dimensional stability even under fluctuating thermal conditions.
✅ 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:
- Excellent weldability and high oxidation resistance
- Ideal for steam and hot water piping systems
- Widely used in refineries, chemical plants, and power generation units
ASME SA335 Grade P22 Chrome Moly Pipes
P22 Chrome Moly Pipes deliver exceptional strength and fatigue resistance for high-pressure and high-temperature applications. With superior creep strength, they are ideal for boilers, reheaters, and petrochemical piping systems.
✅ 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:
- High resistance to thermal fatigue and creep
- Long-lasting performance in extreme temperature environments
- Commonly used in refinery heaters, power plant piping, and pressure vessels
ASME SA335 Grade P91 Chrome Moly Pipes
P91 Chrome Moly Pipes are the strongest and most heat-resistant grade in the series. With a combination of chromium, molybdenum, vanadium, and niobium, they provide superior mechanical strength, oxidation resistance, and creep rupture properties. Perfect for high-pressure steam systems and turbines.
✅ 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:
- Exceptional strength and long-term creep resistance
- Excellent oxidation and corrosion protection
- Ideal for turbines, boilers, and ultra-high-pressure steam pipelines
Why Choose Mcneil Instruments?
✔ ISO/CE-certified manufacturing ensuring superior quality and compliance
✔ CNC-machined precision for leak-proof performance
✔ Custom pipe sizes, pressure ratings, and wall thicknesses available
✔ 100% material traceability and MTC certification
✔ Secure export packaging with on-time global delivery
Applications Across Industries
🔹 Power Generation: Steam and heat transfer systems
🔹 Oil & Gas: High-pressure pipelines and refinery equipment
🔹 Petrochemical Plants: Process heaters and catalytic reactors
🔹 Boiler Systems: Superheater and reheater tubes
🔹 Energy & Thermal Plants: High-temperature piping networks
🔹 Industrial Furnaces: Excellent oxidation resistance at high heat
Contact Us
Looking for premium Chrome Moly Pipes in India?
Mcneil Instruments offers P5, P9, P11, P22, and P91 Chrome Moly Pipes engineered for strength, stability, and high-temperature reliability across industrial sectors.
📞 Get in touch today for custom specifications, expert guidance, and competitive pricing for your projects.
FAQs
What are Chrome Moly Pipes used for?
Chrome Moly Pipes are primarily used in high-temperature and high-pressure applications, such as power plants, refineries, boilers, and petrochemical units. Their combination of chromium and molybdenum enhances strength, oxidation resistance, and performance in harsh industrial environments.
What is the difference between P5, P9, P11, P22, and P91 Chrome Moly Pipes?
Each grade offers different mechanical properties and temperature capabilities.
P5 & P9 are ideal for high-pressure and high-temperature environments.
P11 & P22 balance weldability, strength, and thermal resistance.
P91 offers superior creep strength and is used in ultra-high-pressure steam systems.
Are Mcneil Instruments’ Chrome Moly Pipes compliant with international standards?
Yes. All our Chrome Moly Pipes comply with ASTM A335 / ASME SA335 standards and are manufactured under strict ISO/CE-certified processes to ensure quality, precision, and durability.
Can I order custom sizes and wall thicknesses?
Absolutely. Mcneil Instruments offers customized Chrome Moly Pipes in different sizes, wall thicknesses, and pressure ratings to match specific project requirements across industries.
What makes Mcneil Instruments a trusted manufacturer of Chrome Moly Pipes in India?
Our products are known for precision engineering, certified quality, and global reliability. With CNC machining, 100% material traceability, and on-time worldwide delivery, Mcneil Instruments is one of India’s most reliable suppliers and exporters of Chrome Moly Pipes.
How do Chrome Moly Pipes perform under extreme conditions?
Thanks to their chromium and molybdenum content, these pipes provide excellent resistance to thermal fatigue, scaling, and corrosion, ensuring long-term performance even in temperatures up to 700°C.
Do you provide material test certificates (MTC) with every order?
Yes. Every shipment from Mcneil Instruments includes MTC certification, verifying material composition, mechanical properties, and compliance with relevant standards.