Manufacturer, Supplier & Exporter of Super Duplex Steel Coupling / Half Coupling

Super Duplex Steel Couplings and Half Couplings are essential components in industrial piping systems, designed to connect pipes securely and efficiently. Manufactured by Riddhi Siddhi Impex, these fittings are known for their precision, high-quality materials, and adherence to international standards, making them a trusted choice for industrial applications across India...

These fittings come in both coupling and half coupling configurations, with options for threaded and socket-weld connections. A full coupling joins two pipes of the same diameter, while a half coupling is used to connect one pipe to another fitting or piece of equipment. Their robust construction ensures leak-proof and secure joints in high-pressure systems.

Super Duplex Steel Couplings and Half Couplings are widely used in various industries, including oil and gas, chemical processing, marine, power generation, and petrochemical plants. They are ideal for transporting corrosive fluids, high-pressure gases, and steam, providing durability and safety in critical applications..

The dimensions and designs of these fittings are highly customizable. Riddhi Siddhi Impex offers a range of sizes, pressure ratings, threading types (BSP/NPT), and surface finishes, including polished, passivated, and electroplated options. Custom manufacturing is also available to meet specific operational requirements, ensuring compatibility with existing piping networks...

Riddhi Siddhi Impex supplies these fittings across India, covering major cities such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Jaipur, Kanpur, Lucknow, Varanasi, Amritsar, Chandigarh, Mysuru, and others. Their extensive distribution network ensures timely delivery and efficient customer support..

Super Duplex Steel Coupling / Half Coupling

Specification

Grade	Super Duplex Stainless Steel S32750 / S32760
Standard	ASTM A182 / ASME B16.11
Size Range	1/8" to 6" or Custom
Pressure Class	150#, 300#, 600#
Connection Type	Threaded / Socket Weld
Finish	Polished, Passivated, Electroplated, Customized

Chemical Composition (%)

Element	Content (%)
Chromium (Cr)	24 – 26
Nickel (Ni)	6 – 8
Molybdenum (Mo)	3 – 5
Manganese (Mn)	≤ 2
Carbon (C)	≤ 0.03
Silicon (Si)	≤ 1
Iron (Fe)	Balance
Nitrogen (N)	0.18 – 0.25

Mechanical Properties

Property	Value
Tensile Strength	≥ 750 MPa
Yield Strength (0.2% offset)	≥ 500 MPa
Elongation	≥ 25%
Hardness	≤ 320 HB

Dimension Chart

Size (inch)	Schedule / Wall Thickness	Connection Type
1/8"	Sch 40 / Sch 80	Threaded / Socket Weld
1/4"	Sch 40 / Sch 80	Threaded / Socket Weld
1/2"	Sch 40 / Sch 80	Threaded / Socket Weld
1"	Sch 40 / Sch 80	Threaded / Socket Weld
2"	Sch 40 / Sch 80	Threaded / Socket Weld
3"	Sch 40 / Sch 80	Threaded / Socket Weld

Equivalent Grades

Standard	Grade
UNS	S32750 / S32760
EN	1.4410 / 1.4501
JIS	SUS 329J4L / SUS 329J3L
GB	00Cr25Ni6Mo4N / 00Cr25Ni7Mo4N

Equivalent Standards

Standard	Description
ASTM A182	Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings
ASME B16.11	Forged Steel Fittings, Socket-Welding and Threaded

Other Types of Stainless Steel Fittings

Type	Description
Socket Weld Elbow	Used to change pipe direction with socket-weld connections
Threaded Elbow	45° / 90° elbow with threaded connections
Socket Weld Tee	Branch pipe connection with socket-weld
Threaded Tee	Branch pipe connection with threaded ends
Socket Weld Cross	Four-way pipe junction with socket-weld
Threaded Cross	Four-way pipe junction with threaded ends

The company also provides technical assistance and guidance, helping clients choose the right fittings for their systems and ensuring proper installation. This support ensures optimal performance and longevity of the piping infrastructure..

Frequently Asked Questions (FAQs)

Q1: What are the applications of Super Duplex Steel Couplings?

A1: They are used in oil & gas, chemical, power, and marine industries for connecting pipes in high-pressure and corrosive environments.

Q2: Can you supply custom sizes and threads?

A2: Yes, Riddhi Siddhi Impex offers custom dimensions, threading types, and pressure classes as per client requirements.

Q3: Are these fittings corrosion-resistant?

A3: Yes, Super Duplex Steel provides excellent resistance against chloride corrosion, acids, and harsh environments.

Q4: What connection types are available?

A4: Both **threaded** and **socket-weld** connection types are available for various applications.