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Molybdenum Pipes Grade P5, P9, P11, P22 & P91 Pipes Wholesaler & Supplier in UAE

At Mcneil Alloys, we supply molybdenum grade P-series pipes as part of our regular work with power, refinery, and industrial projects across the UAE. These grades are usually specified when operating temperatures are high, pressure is constant, and the piping system is expected to run for years without interruption.

We manufacture and supply Molybdenum Grade P5, P9, P11, P22, and P91 pipes for clients who need material that meets project specifications, inspection requirements, and local site expectations. In many UAE projects, these pipes are used in steam lines, boilers, refinery units, and high-temperature process systems where material performance cannot be compromised.

Our role as a UAE-based manufacturer and supplier goes beyond just delivering pipes. We coordinate grade selection, heat treatment condition, testing, and documentation so the material arrives ready for inspection and installation. Whether the requirement is for a local shutdown job or a larger project supply, we focus on consistency, traceability, and timely delivery.

What Molybdenum Grade P-Series Pipes Mean to Us at Mcneil Alloys

At Mcneil Alloys, when a client asks about molybdenum grade P-series pipes, we don’t jump straight to a grade number. For us, it simply means the piping system is expected to run hot, stay pressurised, and operate for long hours without failure.

Molybdenum is added to these pipes to help them hold strength when temperatures rise and systems stay under load. The “P” grades are used for pressure piping, and each number reflects how demanding the service conditions are going to be in real operation.

In day-to-day UAE projects, we usually explain it like this:

  • Lower grades are chosen when heat is present but conditions are steady

  • Mid-range grades are used when pressure and temperature work together over time

  • Higher grades are specified only when operating limits are pushed and downtime is not acceptable

Some Of Our Graded Molybdenum Pipes

P5 Molybdenum Grade Pipes

P5 molybdenum grade pipes are commonly used in elevated temperature environments where material stability is important over long operating hours. They are regularly applied in refinery piping, heat exchangers, and process systems that require dependable performance under continuous heat exposure.

P9 Molybdenum Grade Pipes

P9 molybdenum grade pipes are selected for services where temperatures remain high and oxidation control becomes critical. These pipes are widely used in hot process lines, power-related systems, and refinery units where prolonged heat can affect lower-grade materials.

P11 Molybdenum Grade Pipes

P11 molybdenum grade pipes are designed for applications involving both high temperature and pressure. They are commonly used in boilers, steam lines, and power plant piping systems where pipes operate under constant load and require improved long-term strength.

P22 Molybdenum Grade Pipes

P22 molybdenum grade pipes are used in demanding service conditions that involve thermal cycling and higher stress levels. These pipes are typically applied in main steam lines, reheaters, and refinery systems where durability and resistance to deformation are essential.

P91 Molybdenum Grade Pipes

P91 molybdenum grade pipes are developed for extreme operating conditions where both temperature and pressure are very high. They are mainly used in advanced power generation systems and critical applications that require excellent long-term creep resistance and structural stability.

Molybdenum Grade P5 Pipes

At Mcneil Alloys, we manufacture and supply Molybdenum Grade P5 pipes for applications where operating temperatures are elevated but service conditions remain consistent. As a UAE-based manufacturer and supplier, we see P5 used frequently in refinery piping and heat transfer systems that run continuously without heavy pressure variation. This grade offers a reliable balance between performance and practicality, making it a common choice for long-running industrial units.

Highlights:

  • Suitable for steady high-temperature service

  • Commonly used in refineries and heat exchangers

  • Good oxidation resistance for continuous operation

  • Supplied by us in the UAE for local and export projects

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

Molybdenum Grade P9 Pipes

Molybdenum Grade P9 pipes are typically supplied when systems operate at higher temperatures for extended periods and material degradation needs to be controlled. As a manufacturer and exporter in the UAE, we often supply this grade for hot process lines in refineries and power-related installations. P9 is usually selected when a step up from P5 is required without moving to heavier alloy grades.

Highlights:

  • Better heat resistance compared to lower grades

  • Suitable for continuously hot process piping

  • Widely used in refinery and power plant systems

  • Manufactured and exported from the UAE with full documentation

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

Molybdenum Grade P11 Pipes

We supply Molybdenum Grade P11 pipes mainly for steam and boiler-related applications where pressure and temperature work together over long operating cycles. As an experienced supplier in the UAE, we see this grade specified across power plants and industrial steam systems. P11 is chosen when long-term strength and stable performance under load are critical.

Highlights:

  • Designed for combined high pressure and temperature

  • Commonly used in boilers and steam lines

  • Reliable for continuous-duty power applications

  • Supplied in the UAE with inspection-ready condition

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

Molybdenum Grade P22 Pipes

Molybdenum Grade P22 pipes are supplied for demanding service conditions involving high stress, temperature fluctuations, and long service life expectations. At Mcneil Alloys, we manufacture and export this grade for main steam lines, reheaters, and critical refinery piping. P22 is selected when thermal cycling and material durability are key concerns.

Highlights:

  • Strong resistance to thermal stress and deformation

  • Suitable for high-load steam and power systems

  • Common in main steam and reheater applications

  • Manufactured and supplied from the UAE for global projects

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

Molybdenum Grade P91 Pipes

P91 is a grade we supply only when operating conditions are severe and performance margins are tight. As a UAE-based manufacturer and exporter, we provide Molybdenum Grade P91 pipes for advanced power generation systems where extreme temperature, pressure, and long-term creep resistance are required. Material preparation and documentation are especially critical at this level.

Highlights:

  • Designed for extreme temperature and pressure service

  • Used in supercritical and high-efficiency power plants

  • Excellent long-term strength and creep resistance

  • Exported from the UAE for critical industrial projects

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

Applications of Molybdenum Grade P-Series Pipes

When you’re working with molybdenum grade P5, P9, P11, P22, or P91 pipes, the application usually decides everything. We don’t see these grades used in general piping. They come into play only when operating conditions demand it.

From our day-to-day supply experience in the UAE, these pipes are commonly used in:

  • Steam lines and boiler systems where heat and pressure are continuous

  • Power plants handling long operating cycles without frequent shutdowns

  • Refineries where process lines stay hot for most of their service life

  • Superheaters and reheaters exposed to thermal stress

  • High-temperature industrial units where material failure is not an option

Why Choose Us for Molybdenum Grade Pipes

When you work with us, you’re not just buying pipes   you’re trying to avoid problems later. That’s how we see it.

Our molybdenum grade P-series pipes in the UAE with one clear objective: make sure the material works the way you expect once it’s installed.

Here’s what you’ll notice when you work with us:

  • We ask how your system actually operates before confirming the grade

  • We help you avoid over-specifying or under-specifying material

  • Pipes are supplied with the right heat treatment and clear traceability

  • Documentation is prepared to match inspection and site requirements

  • We support UAE projects as well as export orders from the same supply base

  • Communication stays direct — no unnecessary back and forth

We understand that delays usually don’t happen because of price   they happen because of material issues, inspections, or mismatched specifications. Our job is to reduce those risks for you.

Let’s Discuss Your Requirement

If you’re planning to use Molybdenum Grade P5, P9, P11, P22, or P91 pipes, talk to us early. Share your operating temperature, pressure, and application details, and we’ll help you confirm the right approach before material is finalised.

You don’t need a long explanation just the right pipe, supplied correctly.

Contact Mcneil Alloys today to discuss your requirement or request a quotation.

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

Frequently Asked Questions – Molybdenum Grade P-Series Pipes

When should I consider using molybdenum grade P-series pipes? +
Molybdenum grade P-series pipes are typically specified when a system operates at elevated temperatures for long periods and standard materials are no longer reliable. They are commonly used in power plants, refineries, and process systems exposed to continuous heat and pressure.
How do I know which molybdenum grade is right for my project? +
Grade selection usually starts with operating temperature, pressure, and service duration. Once these details are reviewed, it becomes clearer whether a lower grade such as P5 is sufficient or if higher grades like P22 or P91 are required.
Do you manufacture and supply these molybdenum grade pipes in the UAE? +
Yes. Mcneil Alloys manufactures and supplies molybdenum grade P5, P9, P11, P22, and P91 pipes from the UAE. We support both local and export projects with testing, inspection coordination, and full documentation.
What kind of documentation comes with molybdenum grade pipes? +
Pipes are supplied with material test certificates, chemical and mechanical test results, and full traceability. Where required, additional inspection reports or supplementary testing can be arranged prior to dispatch.
Are these pipes suitable for long-term, continuous operation? +
Yes. Molybdenum grade P-series pipes are specifically selected for long-term continuous service. When properly manufactured and installed, they perform reliably in systems that remain under heat and pressure for extended operating cycles.