ASTM A335 P91 Carbon Steel Pipes Manufacturer, Supplier, Stockist & Exporter in India
ASTM A335 P91 Carbon Steel Pipes
Mcneil Instruments is a trusted ASTM A335 P91 Carbon Steel Pipes Manufacturer in India, supplying premium-quality seamless ASTM A335 Grade P91 Alloy Steel Pipes for critical high-temperature and high-pressure industrial applications. As a leading supplier, stockist, distributor, and exporter of ASTM A335 Grade P91 Pipes, we provide pipes manufactured according to applicable ASTM, ASME, ANSI, API, DIN, and EN standards, based on project requirements.
Manufactured from ASTM A335 Grade P91 chromium-molybdenum-vanadium alloy steel, these pipes contain controlled additions of chromium, molybdenum, vanadium, niobium and nitrogen, providing exceptional creep strength, high-temperature mechanical strength, thermal stability and oxidation resistance. P91 is specifically designed for demanding applications where conventional alloy steel grades may not provide the required long-term performance.
ASTM A335 P91 Pipes are widely used in supercritical and ultra-supercritical power plants, thermal power stations, petrochemical facilities, oil & gas refineries, chemical processing plants, boilers, superheaters, reheaters, heat recovery steam generators (HRSGs) and high-pressure steam piping systems.
ASTM A335 P91 Pipes in Turkey
Mcneil Instruments supplies ASTM A335 P91 Carbon Steel Pipes in Turkey for power generation, petrochemical, refinery, EPC and heavy engineering projects. Pipes can be supplied in various sizes, schedules and wall thicknesses with applicable quality documentation and export support.
ASTM A335 P91 Pipes in USA
We supply ASTM A335 P91 Alloy Steel Pipes in the USA for supercritical power plants, high-pressure steam systems, boilers, refineries, petrochemical facilities and other critical high-temperature applications. Project-specific specifications and documentation can be accommodated according to requirements.
ASTM A335 P91 Pipes in Nigeria
Mcneil Instruments supplies ASTM A335 P91 Pipes in Nigeria for power generation, oil & gas, refinery, petrochemical and industrial process applications. We provide specification-based supply with inspection documentation and international export logistics support.
Our ASTM A335 P91 Pipes are available in multiple sizes, schedules, wall thicknesses and lengths to support industrial projects across India, Turkey, USA, Nigeria and other international markets.
Technical Specification of Carbon Grade P91 Pipes
| 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 |
Chemical Composition of ASTM A335 Grade P91
| Element | Composition (%) |
| Carbon (C) | 0.08 – 0.12 |
| Chromium (Cr) | 8.00 – 9.50 |
| Molybdenum (Mo) | 0.85 – 1.05 |
| Vanadium (V) | 0.18 – 0.25 |
| Niobium (Nb) | 0.06 – 0.10 |
| Nitrogen (N) | 0.03 – 0.07 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.20 – 0.50 |
| Phosphorus (P) | 0.020 Max |
| Sulfur (S) | 0.010 Max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
| Tensile Strength | 585 MPa Min |
| Yield Strength | 415 MPa Min |
| Elongation | 20% Min |
| Hardness | 250 HB Max |
| Density | 7.75 g/cm³ |
| Melting Point | Approx. 1420–1450°C |
Equivalent Grades
| Standard | Grade |
| ASTM | A335 P91 |
| ASME | SA335 P91 |
| ASTM | A213 T91 |
| ASME | SA213 T91 |
| EN | X10CrMoVNb9-1 |
What are ASTM A335 Grade P91 Carbon Steel Pipes?
ASTM A335 Grade P91 Carbon Steel Pipes are seamless ferritic chromium-molybdenum-vanadium alloy steel pipes specifically developed for high-temperature and high-pressure service. Although commonly referred to as carbon steel pipes, P91 is technically an advanced alloy steel grade containing controlled additions of chromium, molybdenum, vanadium, niobium and nitrogen.
P91 typically contains approximately 8.00%–9.50% chromium and 0.85%–1.05% molybdenum, along with controlled quantities of vanadium, niobium and nitrogen. This alloy composition, combined with the required heat treatment, provides excellent creep strength, high-temperature mechanical strength, oxidation resistance and thermal stability for demanding service conditions.
These advanced alloy steel pipes are widely used in supercritical and ultra-supercritical power plants, high-pressure steam systems, boilers, superheaters, reheaters, HRSG systems, refineries and petrochemical facilities where long-term performance at elevated temperatures is essential.
ASTM A335 P91 Pipes in Turkey
Mcneil Instruments supplies ASTM A335 P91 Pipes in Turkey for thermal power generation, EPC, refinery, petrochemical and heavy engineering projects. We provide specification-based supply with applicable quality documentation and export support.
ASTM A335 P91 Pipes in USA
We supply ASTM A335 P91 Alloy Steel Pipes in the USA for supercritical and ultra-supercritical power plants, high-pressure steam pipelines, boilers, superheaters and other high-temperature applications. Various sizes, schedules and wall thicknesses can be supplied according to project requirements.
ASTM A335 P91 Pipes in Nigeria
Mcneil Instruments supplies ASTM A335 P91 Pipes in Nigeria for power generation, oil & gas, refinery, petrochemical and industrial process applications. Quality documentation, inspection support and international export logistics are available.
With their combination of exceptional creep resistance, oxidation resistance, thermal stability and high-temperature strength, ASTM A335 Grade P91 Pipes are well suited to demanding energy and industrial infrastructure projects across India, Turkey, USA, Nigeria and other international markets.
Types of ASTM A335 P91 Carbon Steel Pipes We Supply
Mcneil Instrument manufactures and supplies:
- ASTM A335 P91 Seamless Pipes
- ASTM A335 P91 Welded Pipes
- ASTM A335 P91 ERW Pipes
- ASTM A335 P91 EFW Pipes
- ASTM A335 P91 Round Pipes
- ASTM A335 P91 Boiler Pipes
- ASTM A335 P91 Heat Exchanger Pipes
- ASTM A335 P91 High Pressure Pipes
- ASTM A335 P91 Alloy Steel Pipes
- ASTM A335 P91 Chrome Moly Pipes
Features of ASTM A335 P91 Carbon Steel Pipes
- Exceptional creep strength at elevated temperatures
- Superior oxidation and corrosion resistance
- Excellent thermal fatigue resistance
- Outstanding high-pressure performance
- High tensile and yield strength
- Excellent resistance to steam oxidation
- Good weldability with proper heat treatment
- Superior dimensional accuracy
- Long operational service life
- Reduced maintenance and downtime
Applications of ASTM A335 Grade P91 Carbon Steel Pipes
Our ASTM A335 P91 Carbon Steel Pipes are extensively used in:
- Ultra Supercritical Power Plants
- Thermal Power Plants
- Nuclear Power Plants
- Petrochemical Plants
- Petroleum Refineries
- Oil & Gas Processing Facilities
- Chemical Processing Industries
- Boiler Systems
- Superheaters
- Heat Exchangers
- High Pressure Steam Pipelines
- Pressure Vessels
- Industrial Furnace Systems
- Process Piping Systems
- Offshore Energy Projects
Countries We Export To
Mcneil Instrument exports ASTM A335 Grade P91 Carbon Steel Pipes to:
- United States
- Canada
- United Kingdom
- Germany
- France
- Italy
- Netherlands
- UAE
- Saudi Arabia
- Qatar
- Kuwait
- Oman
- Bahrain
- South Africa
- Nigeria
- Australia
- Singapore
- Malaysia
- Indonesia
- Thailand
- Vietnam
- Brazil
Why Choose Mcneil Instruments?
Mcneil Instruments is a trusted ASTM A335 P91 Carbon Steel Pipes Manufacturer, Supplier, Stockist & Exporter in India, supplying high-performance P91 chromium-molybdenum-vanadium alloy steel pipes for critical high-temperature and high-pressure applications. We use certified raw materials and stringent quality control procedures to ensure excellent creep strength, dimensional accuracy, oxidation resistance and dependable long-term performance.
Our ASTM A335 P91 Pipes are supplied to customers across India, Turkey, USA, Nigeria and other international markets, supporting power generation, oil & gas, refinery, petrochemical, EPC and heavy engineering projects.
Our Advantages
- ISO-certified manufacturing
- ASTM A335 / ASME SA335 compliant supply
- Certified raw material sourcing
- Precision production processes
- Hydrostatic Testing
- Ultrasonic Testing (UT)
- Eddy Current Testing, where applicable
- Positive Material Identification (PMI)
- Chemical composition analysis
- Mechanical testing
- Dimensional inspection
- EN 10204 3.1 Mill Test Certificates
- Third-party inspection available
- Large ready stock
- Custom sizes and lengths
- Worldwide export support
- Dedicated technical support
Global Supply & Export Support
Mcneil Instruments supplies ASTM A335 P91 Alloy Steel Pipes in India, Turkey, USA and Nigeria, with quality documentation, inspection support and international logistics assistance for critical industrial and EPC projects.
Need ASTM A335 P91 Pipes for critical industrial applications?
Contact us today for a tailored solution, competitive pricing, technical guidance, quality documentation and worldwide delivery support.
Frequently Asked Questions – Carbon Grade P91 Pipes
What are Carbon Grade P91 Pipes used for?
Carbon Grade P91 Pipes are used in high-temperature and high-pressure industrial systems including boilers, power plants, refineries, and steam pipelines.
How does P91 differ from P22 Carbon Pipes?
P91 contains higher chromium, molybdenum, vanadium, and niobium content compared to P22, offering superior creep resistance, thermal stability, and mechanical strength.
Can Mcneil Instrument supply P91 pipes internationally?
Yes, we export Carbon Grade P91 Pipes worldwide, including UAE, Saudi Arabia, Qatar, Oman, Africa, USA, and Canada.
Are custom sizes and wall thicknesses available?
Absolutely. Mcneil Instrument manufactures P91 pipes in various diameters, lengths, and wall thicknesses to meet specific project requirements.
Are Carbon Grade P91 Pipes suitable for high-pressure and high-temperature applications?
Yes, P91 pipes are engineered for extreme service conditions, providing reliable performance in boilers, power generation, and refinery piping systems.