Dipti Metal Industries is a reputed UNS K31918 manufacturer,Supplier UNS K31918 and global UNS K31918 exporter of WPL3 / UNS K31918 grade steel products including ASTM A420 Gr.3 and A350 LF3 pipe fittings and flanges. These low-temperature carbon steel (LTCS) grades are ideal for critical applications in cryogenic and sub-zero services.

What is WPL3 / UNS K31918?

WPL3 (UNS K31918) is a low-temperature carbon steel forging and pipe fitting grade, known for its notch toughness, good weldability, and dimensional stability under cold conditions. Equivalent standards include:

• ASTM A420 Gr. WPL3 – Buttweld Pipe Fittings
• ASTM A333 Gr.3 – Low-temperature seamless and welded carbon steel pipe
• ASTM A350 LF3 – Forged Flanges and Valve Components

Applications of WPL3 / K31918

• Low-temperature refinery piping systems
• Cryogenic chemical plant connections
• Gas processing, LPG plants and terminals
• Offshore platforms and subsea piping
• Cold storage and refrigeration pipelines

Product Range for WPL3 / UNS K31918

Buttweld Pipe Fittings (ASTM A420 WPL3)

Elbows, tees, reducers, crosses, caps, and stub ends for low-temperature services. Available in seamless and welded configurations.

Forged Flanges (ASTM A350 LF3)

Weld neck, slip-on, blind, threaded and socket weld flanges designed for sub-zero pressure applications. Complies with ASME B16.5 / B16.47.

LTCS Pipes (ASTM A333 Gr.3)

Seamless and ERW carbon steel pipes for cryogenic and low-temperature use, suitable for pressure vessel and heat exchanger service.