Alloy steel pipe fittings

What are Alloy Steel Pipe Fittings?

Alloy Steel Pipe Fittings are components used to connect, control, change direction, or adapt the flow within piping systems made from alloy steels like ASTM A234 WP5, WP11, WP22, WP91, etc.

These fittings are engineered to handle high pressures, elevated temperatures, and corrosive media — offering significantly enhanced performance compared to carbon steel fittings. They are commonly used in power plants, boilers, oil refineries, chemical plants, and heat exchangers.

Most Common Chrome-Moly Grades

P5 / WP5 (5Cr)

High-temperature service with good oxidation resistance.

P9 / WP9 (9Cr)

Excellent creep strength for superheater and refinery use.

P11 / WP11 (1.25Cr)

Balanced strength & toughness for moderate high-temp applications.

P22 / WP22 (2.25Cr)

Industry standard for boiler, superheater, and heat exchanger piping.

P91 / WP91 (9Cr-1Mo-V)

Advanced modified 9Cr for ultra-supercritical power plants – highest creep strength.

Key Features of Alloy Steel Pipe Fittings

Designed for extreme temperature, pressure, and corrosive environments in power generation, petrochemical, and refining industries.

High Temperature Strength

Maintains mechanical integrity at elevated temperatures — ideal for boilers, superheaters, heat exchangers, and high-temperature steam lines.

Excellent Tensile & Yield Strength

Engineered to withstand extreme internal pressures and mechanical loads in high-stress piping systems and pressure vessels.

Creep & Fatigue Resistance

Outstanding long-term performance under cyclic thermal and mechanical loading — critical for turbine piping and process plants with frequent temperature cycles.

Superior Machinability & Weldability

Easy to forge, machine, and weld — supports complex custom fabrication and field modifications without compromising integrity.

Corrosion & Oxidation Resistance

Chromium, molybdenum, and other alloying elements provide excellent protection against oxidizing gases, steam, and acidic media.

Extensive Grades & Customization

Available in P5, P9, P11, P22, P91, P92, etc. — seamless & welded, from ½″ to 48″, fully compliant with ASME B16.9, ASTM A234, and international standards.