Manufacturer, Supplier & Exporter of UNS S32205 Spool

UNS S32205 Spool refers to prefabricated piping spool assemblies manufactured from Duplex Stainless Steel Grade S32205, a high-performance duplex alloy known for combining excellent strength with superior corrosion resistance. These spools typically consist of welded pipe sections, fittings, elbows, flanges, and branch connections fabricated according to engineering drawings and isometric plans. Duplex S32205 contains a balanced mixture of austenitic and ferritic microstructures, giving it exceptional mechanical properties and making it suitable for harsh industrial environments. Due to its outstanding resistance to chloride pitting, cracking, and erosion, UNS S32205 Spool is widely used in offshore, petrochemical, and marine applications where reliability and long service life are essential..

UNS S32205 offers improved corrosion resistance compared to its sister grade S31803 due to tighter composition control and higher mechanical strength. With 22% chromium, 3% molybdenum, and nitrogen-enhanced chemistry, it provides superior protection against localized corrosion such as pitting and crevice corrosion in seawater, brine, and chemical-rich environments. These properties make UNS S32205 Spool ideal for applications where traditional stainless steels like 304 and 316 fail due to chloride-induced stress corrosion cracking. In aggressive industrial environments, S32205 spools offer long-term durability, reduced maintenance, and enhanced structural integrity.

Riddhi Siddhi Impex fabricates UNS S32205 Spools using advanced welding techniques such as GTAW/TIG, SMAW, SAW, and orbital welding to maintain the duplex phase balance and ensure defect-free joints. Each spool assembly is manufactured according to customer-provided drawings, P&IDs, and project specifications. All welds are thoroughly inspected using NDT methods, hydrotesting, and PMI testing to ensure compliance with international quality standards. The spools can also be supplied with pickled, passivated, or coated surfaces depending on the application requirements..

Riddhi Siddhi Impex is a leading manufacturer and supplier of UNS S32205 Spool in India, recognized for its high-quality duplex stainless steel fabrication and timely delivery services. The company specializes in providing custom-engineered spool assemblies designed for high-pressure, high-temperature, and corrosive industrial environments. With a strong technical team and cutting-edge manufacturing facilities, Riddhi Siddhi Impex ensures that every UNS S32205 spool meets the highest standards of precision, durability, and performance. Their expertise in duplex materials makes them one of India’s most reliable sources for industrial spool fabrication..

Every UNS S32205 Spool supplied by Riddhi Siddhi Impex undergoes strict quality checks, including radiographic testing (RT), ultrasonic testing (UT), dye penetrant testing (DPT), hydrostatic pressure testing, and visual inspection. These tests ensure that each spool assembly meets project requirements and international standards like ASTM, ASME, EN, and ISO. Materials are supplied with MTCs (EN 10204 3.1/3.2), heat treatment charts, weld maps, NDT reports, and quality assurance documentation, guaranteeing complete traceability and reliability for critical operations in industries such as oil & gas and petrochemicals.

UNS S32205 Spool – Specification, Composition, Properties & Grades

Specification

Product Name	UNS S32205 Spool
Manufacturer & Supplier	Riddhi Siddhi Impex
Material Grade	Duplex Stainless Steel UNS S32205 / ASTM A182 F51
Available Forms	Pipe Spool, Welded Spool, Fabricated Spool, Custom Spools
Size Range	1/2” NB to 24” NB (Custom sizes available)
Schedule	Sch 10 to Sch XXS
End Types	Flanged, Beveled End, Threaded, Plain End
Manufacturing Standard	ASTM, ASME, EN, DIN, ISO
Applications	Offshore Platforms, Petrochemical Plants, Chemical Processing, Desalination Units, Marine Pipelines

Chemical Composition (UNS S32205)

Element	Percentage (%)
Chromium (Cr)	22.0 – 23.0
Nickel (Ni)	4.5 – 6.5
Molybdenum (Mo)	3.0 – 3.5
Manganese (Mn)	2.0 Max
Silicon (Si)	1.0 Max
Carbon (C)	0.03 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	≥ 450 MPa
Elongation	≥ 25%
Hardness	≤ 290 HB
Impact Toughness	High (Excellent at low temperatures)

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
1/2"	21.3	2.77	Custom
1"	33.4	3.38	Custom
2"	60.3	3.91	Custom
4"	114.3	6.02	Custom
6"	168.3	7.11	Custom
10"	273.1	9.27	Custom
16"	406.4	12.70	Custom

Equivalent Grades

Standard	Equivalent Grade
UNS	S32205
UNS (Alternate)	S31803
ASTM	A182 F51
EN	1.4462
DIN	X2CrNiMoN22-5-3

Equivalent Standards

Standard	Description
ASTM A182	Forged Duplex Stainless Steel Components
ASTM A789/A790	Seamless & Welded Duplex Steel Pipe
ASME SA-182	Pressure Vessel Flanges & Components
EN 10272	Stainless Steel Bars for Pressure Purposes

Other Types of Pipe Spools

Type	Description
Super Duplex Spool	Designed for extremely corrosive and high-pressure applications
Stainless Steel 316L Spool	Used in general industrial and food processing applications
Carbon Steel Spool	Used in low-pressure and structural pipe assemblies
Nickel Alloy Spool	Ideal for highly corrosive chemical environments

As a leading UNS S32205 Spool Domestic Supplier, Riddhi Siddhi Impex caters to customers across major Indian cities including Mumbai, Delhi, Bengaluru (Bangalore), 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 many more. Their strong logistics network ensures timely delivery to important industrial clusters such as Dahej, Ankleshwar, Vilayat, Somnath, Navsari, Valsad, Narmada, Rajpipla, making them an ideal partner for major EPC contractors, refineries, and process plants..

Frequently Asked Questions (FAQs)

Q1: What are the main applications of UNS S32205 Spool?

A1: It is used in desalination plants, offshore rigs, petrochemical units, pipelines, and chemical processing systems.

Q2: Do you offer customized duplex spools?

A2: Yes, Riddhi Siddhi Impex provides fully customized spool fabrication based on engineering drawings and project specifications.

Q3: Is UNS S32205 suitable for marine environments?

A3: Yes, the alloy offers exceptional resistance to seawater corrosion, pitting, and stress corrosion cracking.

Q4: Do you supply spools across India?

A4: Yes, we deliver to Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Pune, Ahmedabad, Surat, Vadodara, and all major industrial cities.