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Mail Us: sales@mcneilalloys.ae

Chrome Moly Pipes P5, P9, P11, P22 & P91 Supplier and Manufacturer in UAE

When you’re dealing with Chrome Moly pipes, the grade alone is never the full story. What really matters is how the pipe will behave once it’s installed and operating under heat and pressure. We look at Chrome Moly grades from a practical point of view  where they’re being used, how long they’re expected to run, and what kind of operating conditions they’ll face on site.

We supply Chrome Moly Pipes in P5, P9, P11, P22, and P91 grades for power plants, refineries, steam systems, and high-temperature industrial piping. Some customers approach us with detailed specifications, while others are still comparing grades. In both situations, we work closely with you to make sure the selected material actually suits your application, not just the drawing.

If you’re sourcing Chrome Moly Pipes in the UAE for a new project or replacement work, we’re here to help you select the right grade and move forward with confidence. Share your operating conditions with us, and we’ll take it from there.

With coordinated supply capabilities from the UAE, we support both local project timelines and export requirements, delivering alloy steel pipes that integrate seamlessly into demanding operating systems and long-term industrial installations.

Types of Our Graded Chrome Moly Pipes

P5 Chrome Moly Pipe

P5 Chrome Moly pipes are commonly used where temperatures are high but operating conditions remain fairly steady. We often see this grade specified for heat exchangers, boilers, and refinery piping where oxidation resistance and stable strength are needed without moving to higher alloy grades.

P9 Chrome Moly Pipe

P9 Chrome Moly pipes are usually selected when systems run hotter and need better resistance to scaling and surface degradation. This grade is widely used in refinery process lines and power plant piping that stays under heat for long periods without frequent shutdowns.

P11 Chrome Moly Pipe

P11 Chrome Moly pipes come into use when both pressure and temperature increase. We supply this grade mainly for boiler systems, steam lines, and superheaters where pipes operate continuously and need to maintain strength over long service cycles.

P22 Chrome Moly Pipe

P22 Chrome Moly pipes are chosen for more demanding services, especially in main steam and reheater lines. This grade handles thermal cycling well and is often used in power plants and refineries where long-term performance under stress is a priority.

P91 Chrome Moly Pipe

P91 Chrome Moly pipes are used in the most severe operating conditions. We typically supply this grade for supercritical power plants and high-efficiency systems where temperatures and pressures are extreme and long-term creep resistance is critical.

P5 Chrome Moly Pipe for Stable High-Temperature Service

P5 Chrome Moly pipes are usually chosen when systems operate at elevated temperatures but under relatively steady conditions. We often supply this grade for refinery piping and heat transfer equipment where oxidation resistance and consistent strength are more important than extreme creep performance. It’s a reliable option for long-running systems that don’t face frequent thermal shocks.

Highlights:

  • Suitable for moderate high-temperature service

  • Good oxidation resistance under continuous heat

  • Commonly used in heat exchangers and boilers

  • Practical balance between performance and cost

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

P9 Chrome Moly Pipe for Hot Process and Refinery Lines

P9 Chrome Moly pipes are typically used when operating temperatures increase and surface scaling becomes a concern. We see this grade specified in refinery and process piping that remains hot for long periods. The added chromium content helps maintain material stability where lower grades may start to degrade over time.

Highlights:

  • Higher chromium than P5 for improved heat resistance

  • Performs well in continuously hot environments

  • Used in refinery and high-temperature process lines

  • Better resistance to oxidation and scaling

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

P11 Chrome Moly Pipe for Boiler and Steam Applications

P11 Chrome Moly pipes come into play when pressure and temperature both start to rise. We regularly supply this grade for boilers, superheaters, and steam lines where pipes operate under constant load. It offers improved creep resistance, making it suitable for systems expected to run for long cycles without shutdown.

Highlights:

  • Designed for high-pressure steam service

  • Improved creep resistance over lower grades

  • Common in boilers and power plant piping

  • Reliable for continuous-duty operation

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

P22 Chrome Moly Pipe for Main Steam and Reheater Systems

P22 Chrome Moly pipes are selected for more demanding applications where thermal cycling and long service life are key concerns. We usually see this grade used in main steam and reheater lines in power plants and refineries. It handles stress well and maintains strength under fluctuating temperatures.

Highlights:

  • High creep strength for severe service

  • Handles thermal cycling effectively

  • Used in main steam and reheater lines

  • Long service life in critical 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

P91 Chrome Moly Pipe for Extreme Temperature and Pressure Conditions

P91 Chrome Moly pipes are used when operating conditions are at the highest level. We typically supply this grade for supercritical power plants and high-efficiency systems where both temperature and pressure are extreme. Material selection, heat treatment, and inspection are especially critical at this level.

Highlights:

  • Excellent creep resistance at very high temperatures

  • Designed for extreme pressure applications

  • Used in supercritical and advanced power systems

  • Supports long-term operational stability

Technical Specification
Parameter Specification
Composition Chromium 8–9.5%, Molybdenum 0.85–1.05%, with Vanadium and Niobium
Temperature Range Up to 700°C
Tensile Strength ≥ 620 MPa
Yield Strength ≥ 440 MPa
Hardness ≤ 100 HRB
Standards ASTM A335 / ASME SA335

Why Choose Mcneil Alloys for Chrome Moly Pipes

When you source Chrome Moly pipes, you’re usually dealing with tight timelines, inspections, and systems that can’t afford material issues later. We understand that. At Mcneil Alloys, we don’t just quote grades — we look at how and where the pipe will actually be used, and whether it makes sense for your operating conditions.

We spend time upfront so you don’t lose time on site. That means confirming the right grade, heat treatment condition, and documentation before material is dispatched. If you’ve dealt with rejections or last-minute clarifications before, you know how important that is.

What You’ll Notice When You Work With Us

  • We ask practical questions about temperature, pressure, and service life

  • You get material that’s prepared for inspection, not back-and-forth approvals

  • Documentation is clear, traceable, and aligned with your project needs

  • We understand refinery and power plant expectations in the UAE

  • Communication stays straightforward from enquiry to delivery

Let’s Talk About Your Chrome Moly Pipe Requirement

If you’re planning to use P5, P9, P11, P22, or P91 Chrome Moly pipes, Contact Us and share a few details about your application and operating conditions. We’ll help you confirm the right grade and supply approach so you can move forward without unnecessary delays.

Talk to Mcneil Alloys today and let’s get it right from the start.  

Frequently Asked Questions – Chrome Moly Pipes

What are Chrome Moly pipes used for? +
Chrome Moly pipes are primarily used in high-temperature and high-pressure systems such as boilers, steam lines, refineries, and power plants. When carbon steel is not suitable for the required heat resistance or service life, Chrome Moly grades such as P11, P22, or P91 are commonly selected.
How do I know which Chrome Moly grade I should use? +
Grade selection depends on operating temperature, pressure, and expected service duration. Once operating conditions are reviewed, it becomes clearer whether grades like P5, P9, P11, P22, or P91 are most appropriate for the application.
Are Chrome Moly pipes suitable for continuous high-temperature service? +
Yes. Chrome Moly pipes are specifically designed for continuous operation at elevated temperatures. Grades such as P11, P22, and P91 are widely used in systems that operate under sustained heat and pressure over long operating cycles.
Which standards are Chrome Moly pipes supplied to? +
Chrome Moly pipes are typically supplied in accordance with ASME SA335 / ASTM standards. Heat treatment, testing, and inspection requirements can also be aligned with specific project specifications or EPC documentation.
What documents will I receive with Chrome Moly pipes? +
Pipes are supplied with material test certificates including chemical and mechanical test results. Where required, additional testing such as PMI, NDT, or supplementary inspection documentation can be arranged before dispatch.