Duplex Steel 31803 Pipes & Tubes | Duplex Steel Seamless Tubes

KVN is a trusted provider and stockholder of Duplex Steel Pipes & Tubes, serving clients across diverse industrial sectors with premium-grade stainless steel solutions. These duplex pipes and tubes are offered in a wide variety of sizes, thicknesses, and custom lengths to meet precise application needs. Known for their dual-phase microstructure, combining austenitic and ferritic stainless steel, these products deliver exceptional mechanical reliability. Manufactured using advanced processes and stringent quality protocols, each unit reflects consistent dimensional accuracy, excellent surface finish, and long-term operational performance.

Technical Overview

Duplex Steel, particularly grades like UNS S31803, S32205, S32760 and S32750 Pipes & Tubes is engineered for strength and corrosion resistance. The alloy composition includes a balanced mix of chromium, molybdenum, and nitrogen, providing high tensile strength and remarkable resistance to localized corrosion such as pitting, crevice corrosion, and stress corrosion cracking. These pipes and tubes maintain excellent performance in both oxidizing and reducing environments, even under elevated temperatures. Whether fabricated, seamless, or welded, they are designed to deliver durability, leak-proof operation, and extended service life. The addition of silver plating on nuts or fittings often enhances resistance to galling, ensuring smooth operation in fluctuating thermal conditions.

Applications & Industry Use

Due to their high strength-to-weight ratio and corrosion resistance, Duplex Steel Pipes & Tubes are widely used in demanding sectors such as petrochemicals, oil and gas, offshore drilling, chemical processing, pulp and paper, desalination plants, and food processing. These are well-suited for both offshore and onshore use due to their exceptional performance under corrosive chemicals, elevated pressure, and harsh marine conditions. These products are engineered to meet the rigorous standards of hydraulic systems, power generation plants, and structural applications in harsh conditions. We proudly supply to key regions including India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, the Sultanate of Oman, Iran, and Iraq.

2205 Duplex Stainless Steel Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.
Duplex Steel 2205	S31803 / S32205	1.4462

Duplex Steel Seamless Pipes

ASME SA 790 Duplex Steel S31803 Seamless Pipes, Duplex Steel UNS S32205 Seamless Pipes, DIN 1.4462 Seamless Pipes, Duplex Steel 2205 Seamless Piping

Duplex Steel Seamless Tubes

ASME SA789 Duplex Steel S31803 Seamless Tube, ASTM A789 Duplex Steel S32205 Seamless Tubing, DIN 1.4462 Seamless Tubes, Duplex 2205 Seamless Tubing

Duplex Steel Welded Pipes

ASTM A790 / SA790 Duplex Steel S31803 Welded Pipes Supplier, Duplex Steel 2205 Welded Pipe, UNS S32205 Welded Pipes, DIN 1.4462 Welded Pipe

Duplex Steel Welded Tubes

DIN 1.4462 Welded Tubing, ASTM A789 / ASME SA 789 Duplex Steel S32205 Welded Tubes, Duplex 2205 Welded Tubes

Duplex Steel EFW Pipes

2205 Duplex Steel EFW Pipes Manufacturers, Duplex UNS S31803 / S32205 EFW Pipe, Duplex Steel DIN 1.4462 EFW Pipe Exporter

Duplex Steel ERW Pipes & Tubes

UNS S31803 ERW Pipes, DIN 1.4462 ERW Tubing, ASTM A789 Duplex S32205 ERW Tubes, ASME SA 790 Duplex Steel S32205 ERW Pipe

Specifications :

ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789

Grade :

UNS S31803, S32205

Size :

½”NB – 24”NB

Thickness Range :

0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS

Outer Diameter :

6.0-630mm

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Delivery Condition :

Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Duplex Steel Pipes and Tubes