Manufacturer, Supplier & Exporter of Duplex 2101 Spool

Duplex 2101 (also known as LDX 2101, UNS S32101) is a lean duplex stainless steel grade that delivers a well-balanced mix of strength and corrosion resistance while being more cost‑effective than conventional duplex grades. A “spool” in this context refers to a prefabricated piping assembly — made up of welded pipe segments, elbows, tees, reducers, and flanges — which is ready to install on site. By choosing Duplex 2101 spools, industries benefit from reduced welding on site, faster assembly, and reliable performance under moderate corrosive and pressure conditions..

Duplex 2101 Spool, also known as UNS S32101 or LDX 2101, is a lean duplex stainless steel designed to combine strength, durability, and moderate corrosion resistance at a cost-effective price. A spool is a prefabricated assembly of pipes, flanges, elbows, tees, and other components welded together in a controlled environment, making it ready for installation. By using spools instead of individual pipes, industries reduce on-site welding, minimize installation time, and improve system integrity..

Riddhi Siddhi Impex is a trusted manufacturer and supplier of Duplex 2101 Spools in India. The company specializes in fabricating precision spools according to client specifications, ensuring each spool maintains the ideal duplex microstructure. Using advanced welding, forming, and finishing techniques, they deliver high-quality spools that meet both domestic and international standards. Their focus on quality, traceability, and timely delivery has made them a preferred supplier across major Indian industrial hubs..

Duplex 2101 is a dual-phase stainless steel with roughly equal proportions of ferrite and austenite. This microstructure provides excellent mechanical strength and good corrosion resistance, making it ideal for applications where moderate chemical exposure occurs. Compared to conventional austenitic stainless steels, Duplex 2101 allows thinner pipe walls without compromising strength, which reduces material costs and overall system weight..

Duplex 2101 spools offer superior mechanical performance. The yield strength typically ranges around 450–500 MPa, tensile strength approximately 650–880 MPa, and elongation around 30%. The grade also demonstrates excellent impact toughness and fatigue resistance. These mechanical advantages allow engineers to design piping systems that handle higher pressures and dynamic loads with reduced material thickness..

Duplex 2101 Spool

Specification

Product Name	Duplex 2101 Spool
Manufacturer	Riddhi Siddhi Impex
Material	Duplex Stainless Steel (UNS S32101 / LDX 2101)
Form	Spool (Pipe + Fittings Welded)
Application	Chemical Industry, Water Treatment, Oil & Gas, Pulp & Paper, Seawater Systems
Finish	Pickled & Passivated, Polished
Standard	ASTM A789 / A182 / ASME B16.9

Chemical Composition (Typical)

Element	Content (%)
Chromium (Cr)	19–21
Nickel (Ni)	1.35–1.70
Manganese (Mn)	4–6
Nitrogen (N)	0.20–0.25
Molybdenum (Mo)	0.10–0.80
Carbon (C)	0.03 Max
Phosphorus (P)	0.03 Max
Sulfur (S)	0.02 Max

Mechanical Properties

Property	Value
Tensile Strength	650–880 MPa
Yield Strength (0.2% offset)	450–500 MPa
Elongation	30% Min
Hardness	≤ 250 HB
Impact Toughness	Excellent at room temperature

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
1/2"	21.3	2.77	Up to 12 m
1"	33.4	3.38	Up to 12 m
2"	60.3	3.91	Up to 12 m
4"	114.3	6.02	Up to 12 m
6"	168.3	7.11	Up to 12 m
8"	219.1	8.18	Up to 12 m

Equivalent Grades

Standard	Grade
ASTM	A789 S32101
EN	1.4162
UNS	S32101
DIN	X2CrMnN 21-2

Equivalent Standards

Standard	Description
ASTM A789	Standard Specification for Seamless and Welded Duplex Stainless Steel Pipe
ASTM A182	Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Fittings, and Valves
ASME B16.9	Factory-Made Wrought Buttwelding Fittings

Other Types of Duplex Stainless Steel Spools

Type	Description
Duplex 2205 Spool	Higher corrosion resistance and strength; used in chemical and offshore industries
Duplex 2304 Spool	Lean duplex steel suitable for water treatment and general corrosion resistance
Duplex 2101 Spool	Cost-effective lean duplex with moderate corrosion resistance
UNS S31803 Spool	Equivalent to Duplex 2205; widely used in marine and chemical industries

As a reliable Duplex 2101 Spool Domestic Supplier, Riddhi Siddhi Impex caters to a wide range of Indian cities including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, and Rajpipla. This extensive network ensures timely delivery and support for industrial projects nationwide..

Frequently Asked Questions (FAQs)

Q1: What are the typical applications of Duplex 2101 Spool?

A1: It is used in chemical processing, water treatment, oil and gas pipelines, and seawater handling systems.

Q2: Can Riddhi Siddhi Impex provide custom spool sizes?

A2: Yes, they provide customized spools in different pipe diameters, wall thicknesses, and lengths based on project requirements.

Q3: How corrosion-resistant is Duplex 2101?

A3: It has moderate corrosion resistance, suitable for mildly corrosive environments including brackish water and mild acids.

Q4: Which Indian cities are served by Riddhi Siddhi Impex for Duplex 2101 spools?

A4: They supply across major cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and many more industrial hubs nationwide.