| Specifications | Astm, Asme, Din, Nfa, Jis |
|---|---|
| Thickness | 4.0mm, 100mm |
| Pipes Size | 1/8” Nb, 24” Nb, 1/4” Od, 24” Od Sizes |
| Tubes Size | 1/2″ Od, 8″ Od |
| Length: | Single Random, Double Random, Required Length, Cut Length, Fix Length |
| End | Plain End, Beveled End, Threaded |
Duplex Seamless Pipe Manufacturer in India
Sagar Steel Corporation is a leading duplex seamless pipes manufacturer, which has high-performance pipes that can be used in harsh environments where strength and resistance to corrosion are of paramount importance. These are pipes that have the dual phase structure of ferritic and austenitic properties, so that they are more durable and resistant to chloride stress corrosion. These pipes are common in offshore rigs, chemical plants, heat exchangers, and marine infrastructure when it is needed to reliably operate under pressure and also withstand chemical attack. We also provide stainless steel seamless pipes in order to serve more industrial requirements.
Duplex Stainless Steel Seamless Pipes - Information Table
Category | Details |
Material family | Duplex Stainless Steel (DSS) |
Microstructure | Ferrite + Austenite (typically balanced after solution anneal) |
Common seamless pipe standards | ASTM A790 / ASME SA790 (Duplex stainless seamless & welded pipe) |
Common seamless tube standards (if required) | ASTM A789 / ASME SA789 (Duplex seamless & welded tubes) |
Most common grades | 2205 (UNS S31803 / S32205, EN 1.4462) ; 2304 (UNS S32304, EN 1.4362) ; Lean Duplex 2101 (UNS S32101, EN 1.4162) |
Typical chemical composition (2205) wt% | C ≤ 0.03, Cr 21–23, Ni 4.5–6.5, Mo 2.5–3.5, N 0.14–0.20, Mn ≤ 2.0, Si ≤ 1.0(confirm exact limits on MTC / spec) |
Typical chemical composition (2304) wt% | C ≤ 0.03, Cr 22–24, Ni 3–5, Mo ≤ 0.6, N ~0.10–0.20(varies by spec) |
Typical chemical composition (Lean Duplex 2101) wt% | C ≤ 0.03, Cr ~21–22, Ni ~1.5, Mo low/none, N ~0.20–0.25, Mn higher(varies by producer/spec) |
Corrosion resistance (summary) | Better than 316/316L in many chloride environments; 2205 offers strong pitting/crevice resistance and good chloride SCC resistance; 2304/lean duplex are mid-range options |
PREN (typical guide) | Lean duplex: ~26–30 ; 2304: ~30–35 ; 2205: ~34–38(approx., chemistry-dependent) |
Mechanical properties (typical, annealed) | Higher strength than austenitic SS: Yield commonly ~450 MPa min (often higher by grade/standard), Tensile ~620–800 MPa (varies by grade, thickness, and standard) |
Supply condition | Typically solution annealed + water quenched, pickled/passivated |
Size range (typical supply) | Seamless commonly NPS 1/8" to 24" (availability depends on mill and wall thickness) |
Common finishes / ends | Pickled & passivated; plain end / bevel end (threaded/grooved on request) |
Typical applications | Oil & gas, chemical processing, pulp & paper, marine/seawater systems, heat exchangers, pressure piping |
Fabrication / welding notes | Use qualified WPS; control heat input & interpass temperature to maintain phase balance; use matching duplex filler; clean and pickle/passivate after welding |
Heat exposure caution | Avoid prolonged exposure in approx. 600–1000°C range (risk of brittle intermetallic phases) |
QA / documentation | EN 10204 3.1/3.2 MTC, PMI on request, hydrotest/NDT per ASTM/ASME and project ITP |
Our duplex seamless pipes are engineered with high accuracy in dimensions, consistency, and long life span, which features in the top B2B portal industry, thereby allowing a smooth process of bulk procurement and integration. These pipes come in all types of diameters and wall thicknesses and are ideal in applications that require high structural strength and pitting, crevice, and stress corrosion resistance. Having smooth internal finishes, good weldability, and an emphasis on durability, they are helpful in keeping the long-term operational and minimizing the maintenance cost of the chemical, oil, and gas plants, as well as desalination plants.
Type of Sub-products
S31803 Duplex Seamless Pipe S31803 Duplex Seamless Pipe
Known for high strength and superior resistance to pitting and chloride environments.
S32205 Duplex Seamless Pipe S32205 Duplex Seamless Pipe
Designed for offshore platforms, pipelines, and chemical handling systems with enhanced stress corrosion resistance.