Manufacturer of ASTM A790 S31803 Duplex Pipes EN 10204 3.2 Certified UNS S31803

ASTM A790 S31803 Duplex Stainless Steel Pipe | UNS S31803 | High Strength Corrosion Resistant Pipes

Meta Description:

Manufacturer of ASTM A790 S31803/2205 duplex steel pipes. Certified EN 10204 3.1, 100% hydro tested, PREN >38. Ideal for offshore, chemical & oil/gas. Request specs.

Product Overview

Our ASTM A790 seamless duplex pipes (UNS S31803) combine austenitic and ferritic microstructures, delivering 2x the yield strength of 316L stainless steel with exceptional chloride stress corrosion cracking (SCC) resistance. Ideal for high-pressure, corrosive environments.

Key Advantages:

• PREN >38 (Pitting Resistance Equivalent)

• 100% Hydrostatic Testing per ASTM A790

• Low-Temperature Toughness (-50°C / -58°F)

• Certified Traceability: EN 10204 3.1 MTC

Chemical Composition (Wt. %) – Optimized for Corrosion Resistance

Table: Balanced Chemistry of S31803 Duplex Steel Pipe

Equivalent Grades – Global Compliance

Table: Cross-Standard Material Equivalents

Mechanical Properties – Engineered for Extreme Service

Table: Room-Temperature Mechanical Properties per ASTM A790

Dimensional Tolerances – Precision Manufacturing

Table: Permissible Variations per ASTM A790/ASME B36.19

Application Domains – Where S31803 Duplex Excels

Corrosion-Demanding Environments:

• Offshore Oil & Gas: Seawater injection lines, risers, umbilicals

• Chemical Processing: Acid coolers, chloride-bearing reactors

• Power Generation: FGD (Flue Gas Desulfurization) systems

• Pulp & Paper: Bleach plants, digesters

• Desalination Plants: High-salinity brine heaters

Why Choose YUHONG Duplex S31803 Pipes?

• Full Traceability

• NACE MR0175/ISO 15156 Compliant (Sour Service)

• Global Stock: Sizes 1/2" to 24" (DN15-DN600), SCH 10S to XXS

• Custom Processing: Beveling, polishing, PMI testing