ASME SB729 UNS 08020 WELDED PIPES

ASME SB 729 UNS N08020 Welded Pipes

ASME SB 729 UNS N08020 Welded Pipes are high-alloy nickel-iron-chromium piping solutions specifically designed for superior corrosion resistance in chemical processing environments. Manufactured from Nickel Alloy 20 (UNS N08020), these welded pipes offer excellent resistance to sulfuric acid, phosphoric acid, and chloride-induced stress corrosion cracking.

Produced in accordance with ASME SB 729 specifications, UNS N08020 Welded Pipes combine high nickel content with chromium, molybdenum, and copper to deliver enhanced protection against pitting, crevice corrosion, and intergranular attack. Stabilized with niobium, this alloy ensures improved resistance to sensitization and maintains structural integrity in aggressive chemical environments.

Specifications of ASME SB 729 UNS N08020 Welded Pipes

Product Type	ASME SB 729 UNS N08020 Welded Pipes
Material Grade	Nickel Alloy 20 (UNS N08020)
Standard	ASME SB 729 / ASTM B729
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 Sulfuric Acid Resistance: Ideal for handling strong acid environments.
• Resistance to Chloride Stress Corrosion Cracking: Performs reliably in chloride-containing media.
• Enhanced Pitting & Crevice Corrosion Resistance: Suitable for harsh chemical processing conditions.
• Stabilized Against Sensitization: Niobium addition prevents intergranular corrosion.
• Strong Weld Integrity: Advanced welding ensures durable and leak-proof seams.
• Good Mechanical Strength: Maintains performance under moderate to high temperatures.
• Long Service Life: Reduces downtime and maintenance costs.

Applications of ASME SB 729 UNS N08020 Welded Pipes

• Chemical Processing Industry: Sulfuric acid and phosphoric acid production systems.
• Petrochemical Plants: Corrosive process piping.
• Oil & Gas Industry: Offshore and sour service environments.
• Pharmaceutical Industry: Corrosion-resistant process equipment.
• Food Processing Industry: Equipment requiring high corrosion resistance.

Quality Assurance

ASME SB 729 UNS N08020 Welded Pipes undergo comprehensive inspection and testing procedures to ensure compliance with ASME and ASTM standards.

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

Conclusion

ASME SB 729 UNS N08020 Welded Pipes deliver excellent corrosion resistance, mechanical strength, and reliable welded construction for critical chemical and industrial applications. Manufactured to stringent international standards, these pipes ensure durability, safety, and long-term operational efficiency.