Dipti Metal Industries founded in 2009 is a leading global NS K21590 exporter, NS K21590 Supplier and NS K21590 manufacturer of UNS K21590 / ASTM A335 Grade P22 / ASTM A213 Grade T22 alloy steel seamless pipes, tubes, flanges, and pipe fittings. Known for its high temperature and high-pressure strength, UNS K21590 is widely used in critical boiler and power plant applications.

What is UNS K21590?

UNS K21590 is the unified number for a chrome-molybdenum alloy steel grade equivalent to:

• ASTM A335 P22 – Seamless pipe for high-temperature service
• ASTM A213 T22 – Seamless tube for boilers, heat exchangers
• ASTM A182 F22 – Forged fittings and flanges
• ASTM A234 WP22 – Buttweld pipe fittings
• ASTM A387 Gr.22 – Pressure vessel plates
• ASTM A217 WC9 – Alloy steel castings for pressure service

Applications of UNS K21590

• High-pressure steam piping systems
• Superheater and reheater tubes in boilers
• Petrochemical plant piping
• Refinery reactors and columns
• Heat exchangers and pressure vessels

UNS K21590 Product Range

Seamless Pipes & Tubes

We supply ASTM A335 P22 and A213 T22 pipes and tubes in various wall thicknesses, sizes, and lengths for high-temperature services.

Forged Flanges & Fittings

Our forged range includes ASTM A182 F22 flanges and high-pressure forged fittings (ASME B16.11) like elbows, tees, couplings, unions.

Buttweld Pipe Fittings

We manufacture and stock A234 WP22 elbows, reducers, caps, and custom bends for power plant and petrochemical piping projects.

Alloy Plates & Castings

We offer alloy steel plates (A387 Gr.22) and valve body castings in A217 WC9 for critical components used under high stress and temperature.