Premium Alloy Steel Pipe Manufacturer in India | ASTM A335 P5, P9, P11, P22, P91

Strength. Precision. Performance – Mcneil Alloy Steel Pipes Strength. Precision. Performance – Mcneil Alloy Steel Pipes When reliability matters, Mcneil Instrument delivers excellence built on engineering expertise and decades of experience. Our ASTM A335 Alloy Steel Pipes are designed to perform under the most demanding industrial conditions — where strength, precision, and temperature resistance are non-negotiable. Manufactured with advanced technology and superior metallurgical practices, each pipe reflects our commitment to unmatched durability and quality. At Mcneil, we supply a comprehensive range of ASTM A335 Alloy Steel Pipes, including P5, P9, P11, P22, and P91 grades. These pipes are developed to meet diverse operational requirements across power generation, energy, petrochemical, oil & gas, and process industries. Whether for boiler tubes, heat exchangers, or refinery lines, our products are engineered to deliver reliability in every application. Understanding ASTM A335 Alloy Steel Pipes

ASTM A335 Alloy Steel Pipes are designed for high-temperature service, making them ideal for industries such as:

• Power Generation Plants (Boilers & Heat Exchangers)
• Petrochemical & Refinery Units
• Oil & Gas Transmission
• Fertilizer & Chemical Processing Plants
• Steam & Pressure Systems

These pipes are made from chromium and molybdenum alloy steel, which enhances creep strength, corrosion resistance, and temperature endurance. The addition of chromium improves oxidation resistance, while molybdenum increases tensile strength and hardenability. Together, they create a robust alloy capable of maintaining structural integrity even in prolonged high-temperature service

Our Product Range – ASTM A335 Grades We Offer 1. ASTM A335 P5 Alloy Steel Pipe

• Excellent oxidation and scaling resistance
• Ideal for refineries and high-temperature steam lines
• High tensile and yield strength

2. ASTM A335 P9 Alloy Steel Pipe

• Superior corrosion resistance
• Used extensively in oil refineries and power plants
• Withstands high pressure and thermal expansion

3. ASTM A335 P11 Alloy Steel Pipe

• Balanced mechanical strength and weldability
• Commonly used in boiler tubing and superheaters
• Cost-effective solution for thermal power projects

4. ASTM A335 P22 Alloy Steel Pipe

• High creep strength and oxidation resistance
• Performs efficiently under constant high temperature
• Perfect for steam pipelines and heat exchanger systems

5. ASTM A335 P91 Alloy Steel Pipe

• Advanced grade with excellent creep rupture strength
• Used in ultra-supercritical power plants
• Exceptional resistance to thermal fatigue and corrosion

Built for Endurance – Quality You Can Trust

At Mcneil Instrument, quality isn’t an afterthought — it’s embedded in our process.

Each Alloy Steel Pipe undergoes stringent quality control, from raw material selection to final inspection. With our advanced manufacturing setup, we deliver pipes that meet international codes and exceed expectations in durability and performance.

• 100% Radiographic & Hydrostatic Testing
• Chemical & Mechanical Property Verification
• Dimensional & Surface Finish Inspection
• NACE MR-0175 Compliance for sour service applications

Our pipes are designed to withstand pressure up to 6000 PSI and temperatures exceeding 700°F, making them suitable for the toughest industrial environments.

Technical Specifications & Standards

Specification

Details

Standard

ASTM A335 / ASME SA335

Grades Available

P5, P9, P11, P22, P91

Size Range

1/2" NB – 24" NB

Thickness

SCH 20 to SCH XXS

Type

Seamless, Welded, ERW

End Connections

Plain End, Bevel End, Threaded

Form

Round, Hydraulic, Rectangular

Testing

Hydrostatic, Eddy Current, Ultrasonic

Temperature Rating

Up to 600°C (1112°F)

Each pipe is manufactured, heat-treated, and tested according to strict international standards, ensuring uniform quality and metallurgical integrity.

Mcneil Instruments Inc. is a trusted global manufacturer and exporter of instrumentation, fittings, and Astm A335 Alloy Steel Pipes (P5–P91), delivering precision and reliability for high-pressure industrial applications.