Duplex Stainless Steel Buttweld fittings

About Duplex Stainless Steel Buttweld fittings

Specification

• Specifications  : ASTM A815 / ASME SA815
• Size  : Seamless Butt Weld Fittings: 1/2-10, Welded Butt Weld Fittings: 1/2-48
• Standards  : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
• Thickness  : 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75
• Types  : Seamless / Welded / Fabricated 

Corrosion Resistance

Duplex Stainless Steel Buttweld fittings provide exceptional resistance to pitting, crevice, and stress corrosion. Their dual-phase microstructure enables superior protection against aggressive chemicals, making them suitable for environments exposed to corrosive liquids and gases. This level of resistance extends the service life and reduces the need for frequent replacements in critical piping systems.


Testing and Compliance

Each fitting undergoes comprehensive testing, including 100% radiography, hydrostatic, and PMI testing. Additionally, non-destructive tests such as ultrasonic, dye penetrant, and eddy current methods are performed where applicable. Products comply with global standards like NACE MR0175, ISO 15156, and are PED approved, ensuring safe integration into oil & gas, chemical, and other high-demand industries.


Manufacturing and Quality Assurance

Fittings are produced using hot forming, cold forming, seamless, or welded techniques. The edge preparation follows ASME B16.25 specifications and the tolerance is 0.5 mm. Surface treatments such as pickling and passivation enhance protection and cleanliness, while export-worthy wooden cases or pallets are used for secure packaging during transit to maintain product integrity.