Duplex 2304 Spool

Manufacturer, Supplier & Exporter of Duplex 2304 Spool

Duplex 2304 Spool refers to pre-fabricated piping spool assemblies made from Duplex Stainless Steel Grade 2304. This alloy is known for its balanced dual-phase structure of austenite and ferrite, offering both high mechanical strength and superior corrosion resistance at a competitive cost. Duplex 2304 pipe spools typically consist of welded pipes, elbows, tees, reducers, and flanges assembled according to engineering drawings to ensure fast installation at industrial sites. Due to its moderate molybdenum content and optimized chromium-nitrogen composition, Duplex 2304 offers better corrosion resistance than 304/316 stainless steel, making it ideal for general industrial environments where chloride levels are moderate..

Duplex 2304 provides excellent resistance to pitting corrosion, stress corrosion cracking, and crevice corrosion, particularly in environments involving chlorides, chemicals, and lightly acidic media. Compared to austenitic stainless steels, Duplex 2304 offers nearly double the yield strength, reducing material weight and cost without compromising durability. The alloy delivers stable performance in temperatures between –50°C and 250°C, making Duplex 2304 Spools highly suitable for structural piping, cooling water systems, and industrial fluid transportation applications. Its high strength-to-cost ratio makes it a preferred material in commercial and industrial projects seeking long-lasting performance.

Riddhi Siddhi Impex manufactures Duplex 2304 Spools using precision welding methods such as TIG/GTAW, MIG/GMAW, and SMAW, ensuring proper ferrite-austenite balance during fabrication. The spool assemblies are produced based on detailed P&IDs, isometric drawings, and project specifications. All welding operations adhere to industry codes such as ASME Section IX and ISO welding qualifications. Each spool undergoes pickling, passivation, grinding, and dimensional alignment to ensure stress-free and defect-free assemblies suited for high-performance applications..

Riddhi Siddhi Impex is one of India’s most trusted manufacturers and suppliers of Duplex 2304 Spools. With years of experience in duplex stainless steel fabrication, the company has built a strong reputation for delivering superior-quality product assemblies for industries such as oil & gas, chemical processing, desalination, food processing, and water treatment. Their advanced fabrication facilities, along with rigorous quality practices, enable them to provide tailor-made Duplex 2304 spool solutions for EPC companies, mechanical contractors, and industrial maintenance firms..

To ensure that every Duplex 2304 Spool meets stringent quality requirements, Riddhi Siddhi Impex conducts extensive testing procedures such as hydrostatic testing, radiography (RT), ultrasonic inspection (UT), dye penetrant testing (DPT), and PMI (Positive Material Identification). Test certificates, including EN 10204 3.1/3.2 MTCs, weld maps, quality plans, and inspection reports, accompany each shipment. This level of documentation and quality ensures that the spools perform reliably in demanding environments and comply with global standards such as ASTM, ASME, and DIN.

Duplex 2304 Spool Specification

Product Name	Duplex 2304 Spool
Manufacturer	Riddhi Siddhi Impex
Material Grade	Duplex Stainless Steel UNS S32205 / 2304
Form	Spool, Pipe, Flanges, Elbows, Tees, Reducers
Standard	ASTM A789 / A182 / ASME B16.9
Applications	Chemical Industry, Oil & Gas, Water Treatment, Marine, Pulp & Paper, Structural Piping

Chemical Composition (Approx. %)

Element	Content (%)
Carbon (C)	0.03 max
Chromium (Cr)	22 – 23
Nickel (Ni)	4 – 6
Molybdenum (Mo)	2 – 3
Manganese (Mn)	2 max
Silicon (Si)	1 max
Nitrogen (N)	0.14 – 0.20
Phosphorus (P)	0.03 max
Sulfur (S)	0.02 max

Mechanical Properties

Property	Value
Tensile Strength	≥ 620 MPa
Yield Strength (0.2% offset)	≥ 450 MPa
Elongation	≥ 25%
Hardness	≤ 280 HB
Impact Strength	Excellent, even at low temperatures

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
10"	273.1	9.27	Up to 12 m
16"	406.4	12.70	Up to 12 m

Equivalent Grades

Standard	Grade
UNS	S32205 / 2304
EN	1.4462
AISI/ASTM	ASTM A240 / A789
DIN	1.4462

Equivalent Standards

Standard	Description
ASTM A789 / A182	Seamless and Welded Duplex Stainless Steel Pipes & Fittings
ASME B16.9	Factory-Made Wrought Buttwelding Fittings
EN 10222-5	Duplex Stainless Steel Tubes for Pressure Purposes

Other Types of Duplex Stainless Steel Spools

Type	Description
Duplex 2205 Spool	Higher corrosion resistance, widely used in chemical and marine applications
Duplex 2507 Spool	Super duplex with extreme corrosion resistance for offshore and desalination plants
Duplex 2304 Coated Spool	Enhanced surface coating for better pitting and crevice corrosion resistance
Duplex 2304 Welded Spool	Customized welded spool assemblies for piping projects

As a premier Duplex 2304 Spool Domestic Supplier, Riddhi Siddhi Impex provides timely distribution across India’s major industrial 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, and more. Their efficient logistics also cover key industrial zones like Dahej, Vilayat, Ankleshwar, Narmada, Somnath, Navsari, Valsad, and Rajpipla, ensuring smooth supply for project requirements across India’s manufacturing and processing sectors.

Frequently Asked Questions (FAQs)

Q1: What are the typical applications of Duplex 2304 Spool?

A1: It is used in chemical processing, desalination, water treatment, structural piping, and industrial fluid transfer applications.

Q2: Can Duplex 2304 Spools be supplied in customized dimensions?

A2: Yes, Riddhi Siddhi Impex provides customized spools in various diameters, wall thicknesses, lengths, and configurations as per project requirements.

Q3: What makes Duplex 2304 corrosion-resistant?

A3: Its balanced ferritic-austenitic microstructure, chromium, molybdenum, and nitrogen content provide high resistance to pitting, crevice, and stress corrosion.

Q4: Are these spools available in all major Indian cities?

A4: Yes, Riddhi Siddhi Impex supplies Duplex 2304 Spools across Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and other industrial cities nationwide.