ASME SB 165 UNS N04400 WELDED PIPES

ASME SB 165 UNS N04400 Welded Pipes

ASME SB 165 UNS N04400 Welded Pipes are premium-quality nickel-copper alloy piping solutions designed for outstanding resistance to corrosion, particularly in marine and chemical environments. Manufactured from Nickel Alloy 400 (UNS N04400), these welded pipes provide excellent mechanical strength, toughness, and durability across a wide range of temperatures.

Produced in accordance with ASME SB 165 specifications, UNS N04400 Welded Pipes offer superior resistance to seawater, hydrofluoric acid, sulfuric acid, and alkaline solutions. With advanced welding processes and strict dimensional tolerances, these pipes ensure structural integrity and long-term performance in demanding industrial applications.

Specifications of ASME SB 165 UNS N04400 Welded Pipes

Product Type	ASME SB 165 UNS N04400 Welded Pipes
Material Grade	Nickel Alloy 400 (UNS N04400)
Standard	ASME SB 165 / ASTM B165
Manufacturing Process	Welded (ERW / TIG / Laser Welded)
Size Range	1/8" NB to 48" NB (Custom Sizes Available)
Wall Thickness	SCH 5 to SCH XXS
Length	Single Random / Double Random / Cut Length
Surface Finish	Pickled / Annealed / Polished / As Welded

Key Benefits

• Excellent Seawater Resistance: Highly resistant to marine corrosion and saltwater environments.
• Strong Mechanical Properties: Maintains strength and toughness from sub-zero to elevated temperatures.
• Resistance to Acids & Alkalis: Performs well in hydrofluoric, sulfuric acids, and alkaline solutions.
• Stress Corrosion Cracking Resistance: Suitable for harsh chemical processing systems.
• Strong Weld Integrity: Precision welding ensures durable and leak-proof seams.
• Good Fabricability: Easily formed, machined, and welded for custom industrial applications.
• Long Service Life: Reduces maintenance costs and downtime.

Applications of ASME SB 165 UNS N04400 Welded Pipes

• Marine Industry: Seawater piping, shipbuilding, and offshore platforms.
• Chemical Processing: Handling corrosive acids and alkalis.
• Oil & Gas Industry: Refinery and process piping systems.
• Power Generation: Heat exchangers and condenser tubes.
• Desalination Plants: Brine heaters and evaporators.

Quality Assurance

ASME SB 165 UNS N04400 Welded Pipes undergo strict inspection and testing procedures to ensure compliance with ASME and ASTM standards.

• Chemical Composition Testing: Verification of nickel and copper content.
• Mechanical Testing: Tensile strength, hardness, and flattening tests.
• Non-Destructive Testing (NDT): Radiographic and ultrasonic inspection.
• Hydrostatic Testing: Pressure testing for leak-proof performance.
• Certification: Mill Test Certificates (MTC) as per EN 10204 3.1.

Conclusion

ASME SB 165 UNS N04400 Welded Pipes deliver exceptional corrosion resistance, mechanical strength, and reliable welded construction for demanding industrial environments. Manufactured to stringent international standards, these pipes ensure durability, safety, and long-term operational efficiency.