Manufacturer, Supplier & Exporter of Duplex Steel Pipe Nipple

Duplex Steel Pipe Nipples are highly durable and corrosion-resistant fittings used to connect two pipes in piping systems while maintaining a smooth flow of liquids or gases. Manufactured with high-quality duplex stainless steel, these pipe nipples combine the properties of austenitic and ferritic stainless steels, offering superior strength, toughness, and excellent resistance against chloride stress corrosion cracking. Riddhi Siddhi Impex is a reputed manufacturer and domestic supplier of these pipe nipples, delivering premium quality products across India...

Riddhi Siddhi Impex ensures that each Duplex Steel Pipe Nipple is produced using precision forging and seamless fabrication methods to meet stringent industrial standards such as ASTM A182, ASME SA182, and EN 1.4462 / 1.4410. The nipples are available in various sizes and pressure ratings to suit applications in chemical, petrochemical, oil and gas, marine, power, and water treatment industries. Their robustness and long service life make them ideal for both high-temperature and high-pressure environments..

The company supplies Duplex Steel Pipe Nipples in multiple domestic cities including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, and Nagpur. Additionally, Riddhi Siddhi Impex ensures distribution to emerging industrial hubs such as Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, and Mangalore. This widespread network guarantees timely delivery and local support for clients nationwide...

Duplex Steel Pipe Nipples from Riddhi Siddhi Impex are manufactured in grades like Duplex 2205 and Super Duplex 2507, which provide excellent pitting, crevice corrosion, and stress corrosion resistance. These grades are especially suitable for chloride-rich environments such as seawater applications and chemical processing plants. The material selection ensures a long lifespan, reduced maintenance, and a high return on investment for industries using these fittings..

The range of pipe nipples includes both threaded and socket weld ends, catering to different installation requirements. Threaded nipples are ideal for low-pressure applications where easy assembly and disassembly are required, whereas socket weld nipples are suitable for high-pressure pipelines where secure, leak-proof connections are essential. Riddhi Siddhi Impex manufactures these fittings with precise threading and smooth internal finishes to ensure minimal pressure drop and turbulence in pipelines..

Duplex Steel Pipe Nipple

Specification

Grade	Duplex 2205 / Super Duplex 2507
Standard	ASTM A182 / ASME SA182 / EN 1.4462 / 1.4410
Size	1/2" – 12" (Custom Sizes Available)
Pressure Rating	150 – 2500 lbs
End Connection	Threaded / Socket Weld
Finish	Polished, Pickled, or Customized

Chemical Composition (%)

Element	Duplex 2205	Super Duplex 2507
Chromium (Cr)	21-23	24-26
Nickel (Ni)	4.5-6.5	6-8
Molybdenum (Mo)	2.5-3.5	3-5
Nitrogen (N)	0.14-0.20	0.24-0.32
Iron (Fe)	Balance	Balance

Mechanical Properties

Property	Duplex 2205	Super Duplex 2507
Tensile Strength	620 MPa Min	750 MPa Min
Yield Strength (0.2% offset)	450 MPa Min	550 MPa Min
Elongation	25% Min	25% Min
Hardness	≤ 320 HB	≤ 350 HB

Dimension Chart

Nominal Pipe Size (inch)	Thread Type	Length (mm)
1/2"	BSP / NPT	50-100
1"	BSP / NPT	60-120
2"	BSP / NPT	80-150
4"	BSP / NPT	100-200
6"	BSP / NPT	150-250

Equivalent Grades

Standard	Grade
ASTM	Duplex 2205 / Super Duplex 2507
EN	1.4462 / 1.4410
JIS	SUS 329 / SUS 32750
GB	06Cr22Ni5Mo3N / 00Cr25Ni7Mo4N

Equivalent Standards

Standard	Description
ASTM A182	Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forgings, and Fittings
ASME SA182	Standard Specification for Stainless Steel Pipe Fittings
EN 10222-5	Steel Forgings for Pressure Purposes

Other Types of Duplex / Stainless Steel Pipe Fittings

Type	Description
Socket Weld Nipple	Seamless connection for high-pressure pipelines
Threaded Union	Easy to assemble/disassemble low-pressure connections
Socket Weld Cap	Used to close pipe ends securely
Reducer Insert	Connects pipes of different diameters
Duplex Steel Bushing	Reduces the diameter of the pipe in the system

The chemical composition of Duplex Steel Pipe Nipples ensures excellent corrosion performance. With chromium content around 22–23%, nickel 4.5–6.5%, molybdenum 3–3.5%, and nitrogen 0.14–0.20%, these fittings provide outstanding protection against pitting, crevice corrosion, and intergranular attack. Riddhi Siddhi Impex maintains strict quality checks during production to ensure consistency and compliance with international standards..

Frequently Asked Questions (FAQs)

Q1: What are the main applications of Duplex Steel Pipe Nipples?

A1: They are widely used in oil and gas, chemical processing, water treatment, marine, and power industries where corrosion resistance and high strength are required.

Q2: Can Riddhi Siddhi Impex supply custom sizes and threads?

A2: Yes, custom sizes, thread types, and pressure ratings are available to meet specific industrial requirements.

Q3: What is the corrosion resistance of Duplex Steel Pipe Nipples?

A3: They offer excellent resistance to pitting, crevice, and stress corrosion, making them suitable for chloride-rich environments and chemical processing.

Q4: Which Indian cities are covered by Riddhi Siddhi Impex for supply?

A4: Domestic supply is available across Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Jaipur, and many other cities nationwide.