Duplex Stainless Steel Forged Fittings

Duplex Stainless Steel

Duplex stainless steel forged fittings represent a crucial component in many piping systems, valued for their exceptional qualities. Crafted from a blend of austenitic and ferritic stainless steels, duplex steel forged fittings offer a compelling combination of attributes including excellent corrosion resistance, high strength, and weldability. They are particularly sought after in scenarios where high pressure, elevated temperatures, and corrosive environments pose significant challenges.

Diverse in type and application, duplex stainless steel forged fittings encompass a range of options, including duplex steel forged pipe fittings, duplex steel forged elbows, duplex steel socket weld fittings, and duplex steel threaded fittings. Each variant possesses distinct features and advantages tailored to specific application requirements.

Standard Specifications of Duplex Stainless Steel ASTM A Forged Pipe Fittings

ASTM A182 is the standard specification for forged or rolled alloy-steel pipe fittings that are used in high-temperature services. This specification covers various grades of stainless steel, including duplex and super duplex steel. These materials have excellent corrosion resistance properties, which make them suitable for use in harsh environments.

Duplex Steel ASTM A182 F51

Duplex steel ASTM A182 F51 is a type of duplex stainless steel that has a high level of strength and corrosion resistance. It contains 22% chromium, 5% nickel, and 3% molybdenum, which gives it superior properties compared to other types of stainless steel. The material is commonly used in the oil and gas industry for applications such as pipelines, valves, and fittings.

ASTM A182 Specifications

The ASTM A182 specification covers several grades of alloy-steel forgings for high-temperature services. These include grades F1 through F91, which cover low-alloy steels with different chemical compositions suitable for various applications.

ASME B16 Standards

The ASME B16 standards cover various aspects of piping, including dimensions, tolerances, materials, and testing. These standards are used by engineers and designers to ensure that piping systems are safe, reliable, and efficient.

ANSI Standards

The ANSI standards cover a wide range of topics related to engineering and manufacturing. These include standards for materials, processes, equipment, and safety. The ANSI B16 standard covers pipe flanges and fittings dimensions.

Types of Duplex Stainless Steel Forged Fittings

Duplex Steel Elbows

Duplex steel elbows are one of the most commonly used types of duplex stainless steel forged fittings. These elbows have a 90-degree bend and are used to change the direction of flow in pipelines or plumbing systems. They come in different sizes and thicknesses to suit various applications.

One advantage of using duplex steel elbows is their excellent corrosion resistance properties, making them ideal for use in harsh environments such as offshore oil rigs or chemical plants.

Duplex Steel Tees

Duplex steel tees are another type of duplex stainless steel forged fitting that is widely used in various industries. These tees have a T-shaped design and are used to combine or split fluid flow in pipelines or plumbing systems.

Like duplex steel elbows, these tees also offer excellent corrosion resistance properties, making them suitable for use in harsh environments where exposure to corrosive substances is common.

Duplex Steel Couplings

Duplex steel couplings are designed to connect two pipes together without the need for welding or threading. These couplings can be easily installed and removed, making them ideal for use in temporary piping systems or situations where frequent maintenance is required.

Duplex steel couplings come in different sizes and designs to suit various applications. They offer excellent corrosion resistance properties, making them suitable for use in harsh environments.

Duplex Steel Crosses

Duplex steel crosses are similar to duplex steel tees but have four branches instead of three. These crosses are used to combine or split fluid flow in pipelines or plumbing systems that require more than two connections.

Like other types of duplex stainless steel forged fittings, these crosses offer excellent corrosion resistance properties, making them suitable for use in harsh environments.

Duplex Steel Caps

Duplex steel caps are used to seal the end of a pipe or fitting. These caps come in different sizes and designs to suit various applications. They offer excellent corrosion resistance properties, making them ideal for use in harsh environments where exposure to corrosive substances is common.

Duplex Steel Reducers

Duplex steel reducers are used to connect pipes with different diameters together. These reducers come in different sizes and designs to suit various applications. One advantage of using duplex steel reducers is their excellent mechanical properties, which make them ideal for use in high-pressure piping systems.

Benefits of Using Duplex Stainless Steel Forged Fittings

Resistance to Corrosion

One of the most significant benefits of using duplex stainless steel forged fittings is their exceptional resistance to corrosion. These fittings are designed to withstand harsh environments and corrosive media, making them ideal for use in a wide range of industrial applications.

The high level of chromium and molybdenum content in duplex stainless steel provides excellent resistance to both uniform and localized corrosion. This means that these fittings can be used in highly corrosive environments such as offshore oil rigs, chemical plants, and desalination plants.

Strength and Durability

Duplex stainless steel forged fittings are also known for their strength and durability. They are designed to withstand high pressure, extreme temperatures, and heavy loads without deforming or breaking. This makes them ideal for use in critical applications where failure is not an option.

Cost-Effective Solution

While duplex stainless steel forged fittings may cost more upfront than other materials such as carbon steel or standard stainless steel, they offer long-term cost savings due to their durability and resistance to corrosion. In addition, they require less maintenance over time, reducing overall operating costs.

Versatility

Duplex stainless steel forged fittings are versatile enough to be used in a wide range of applications across various industries such as oil & gas, chemical processing plants, marine engineering projects etc.. They come in different shapes (elbows, tees etc.) which allows them to fit into any piping system easily.

Duplex Forged Fittings Specification

Specifications	ASTM A182 / ASME SA182
Duplex Stainless Steel Forged Fitting Thickness	SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Duplex Stainless Forged Fitting Types	Seamless / Welded / ERW / Fabricated Duplex SS Forged Fitting
ASTM A182 Duplex Steel Forged Fitting Dimensions	ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799
SA182 Duplex Steel Forged Fitting Type	DN15-DN1200
Duplex Steel Forged Fittings Thread	NPT, BSPT, BSPP
Duplex Steel Forged Fittings Pressure Rating	2000lb/ 3000lb/ 6000lbs /9000lbs
Connection	Welding
Bending Radius	R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom Duplex SS Forged Fitting
Stainless Steel Duplex Forged Fitting Size Range	½" NB to 24" NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100)
Duplex Steel Elbow	"Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D. Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO"

Duplex Forged Pipe Fittings

A182 Duplex Forged Equal Cross	ASTM A182 Duplex Steel Forged Tee
ASTM A182 Duplex Steel Forged Threaded Outlet (Npt)	Forged ASTM A182 Duplex 3000 (3m) Bspp Fittings
ASTM A182 Duplex Steel Forged Coupling	Forged ASTM A182 Duplex Steel 3000 (3m) Bspt Fittings
Forged Stainless Steel Duplex Street Elbow	A182 Duplex Steel Forged Cross
Forged A182 Duplex Steel 3000 (3m) Fittings	Duplex Stainless 3000 (3m) Forged Npt Fittings
Forged ASTM A182 Duplex Steel 6000 (6m) Npt Fittings	Forged DSS Elbow
SA182 Duplex Steel 6000 (6m) Forged Fittings	Forged Stainless Steel Duplex 6000 (6m) Bspt Fittings
Stainless Steel Duplex Forged Half Coupling	Forged ASTM A182 Duplex Steel Plug
SA182 Duplex Steel 3000 (3m) Forged Fittings	Duplex Forged Socketweld Outlet
Duplex 6000 (6m) Forged Fittings	Forged Duplex Stainless Steel Round Head Plug
Duplex 6000 (6m) Forged Fittings	Forged Duplex Stainless Steel Round Head Plug
ASTM A182 Duplex Steel Forged 45° Elbow	Forged Duplex Stainless Steel 90° Elbow
ASTM A182 Duplex Forged Square Head Plug	Forged DSS Equal Tee
Duplex Forged Nipple	Duplex Stainless Forged Outlet Fitting
Duplex Stainless Steel Forged Full Coupling	ASTM A182 Duplex Steel Forged Outlet
Forged DSS Hex Head Plug	ASTM A182 Duplex Forged Union
Forged Duplex Stainless Steel Reducing Tee	Stainless Steel Duplex Forged End Cap
ASTM A182 Duplex Steel Forged Pipe Nipple	Duplex Stainless Forged Hex Nipple
DSS Forged Reducing Hex Nipple	-

Duplex Steel Forged Fittings Manufacturing Standards

ASTM A182 - ASME SA182	Standard Specification for Wrought Austenitic Duplex Steel Piping Fittings
ASME B16.11	Socket Welding and Threaded Forged Fittings
MSS SP-43	Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications
MSS SP-95	Swage(d) Nipples and Bull Plugs
BS3799	Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry

Chemical Composition of Duplex Duplex Steel High Pressure Fittings

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N	Fe
S31803	0.030 max	2.00 max	1.00 max	0.030 max	0.020 max	22.0 – 23.0	3.0 – 3.5	4.50 – 6.50	0.14 – 0.20	63.72 min
S32205	0.030 max	2.00 max	1.00 max	0.030 max	0.020 max	21.0 – 23.0	2.50 - 3.50	4.50 – 6.50	0.8 – 0.20	63.54 min

Mechanical Properties of ASTM A182 Duplex Steel Forged Pipe Fittings

Grades	Density (g/cm 3)	Density (lb/in 3)	Melting Point (°C)	Melting Point (°F)
S31803 / S32205	7.805	0.285	1420 – 1465	2588 – 2669

Industrial Application of Stainless Steel Sheet

Defence & Aerospace

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Oil/Gas

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Speciality Valves & Vacuum

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Precision Components

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FAQ

1)What is the difference between stainless steel and duplex stainless steel?

Duplex stainless steel is a type of stainless steel that contains both austenitic and ferritic microstructures.both stainless steel and duplex stainless steel offer corrosion resistance, duplex stainless steel stands out for its enhanced corrosion resistance, strength, and toughness, making it suitable for demanding applications in aggressive environments.

2)What is the most common duplex stainless steel?

The most commonly used duplex stainless steel in Maharashtra,like in many other parts of the world, is UNS S31803, also known as 2205 duplex stainless steel. This alloy is widely utilized in various industries due to its excellent combination of corrosion resistance, high strength, and good weldability.

3)What is 22 cr duplex material?

A material referred to as “22Cr duplex” typically indicates a type of duplex stainless steel with a chromium (Cr) content of approximately 22%. Duplex stainless steels are characterized by their two-phase microstructure, consisting of both austenite and ferrite phases. The balanced combination of these phases gives duplex stainless steels their desirable properties, including high corrosion resistance and good mechanical strength.

4)What are duplex standard sizes?

Duplex stainless steel, such as Duplex 2205, is available in a wide range of standard sizes for various products like pipes, tubes, sheets, and bars.
Duplex Pipe and Tubing- common sizes like 1/2″, 3/4″, 1″, 2″, 3″, 4″, 6″, 8″, 10″, and 12″ and sometimes larger.
Duplex Sheet and Plate-Standard sheet sizes may include 1000mm x 2000mm, 1219mm x 2438mm (4ft x 8ft), and larger.
Duplex Round Bars and Rods-Standard lengths for round bars are typically 12 feet (3.66 meters) or 20 feet (6.1 meters), but custom lengths can be ordered.
Duplex Fittings -Duplex fittings, such as elbows, tees, reducers, and flanges, come in various sizes, usually ranging from 1/2″ to 12″ or larger.

Duplex Stainless Steel Forged Fittings