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Forged Fittings

ARK Stainless Inc. is a leading Manufacturer and Exporter of premium-quality Forged Fittings based in Mumbai, India. We are dedicated to producing high-performance Forged Fittings crafted from superior-grade raw materials, carefully inspected and processed by skilled professionals to ensure strength, precision, and reliability.

Our Forged Fittings are manufactured in full compliance with National and International Standards, offering excellent durability and performance under high-pressure and high-temperature conditions. With a focus on innovation and quality, ARK Stainless Inc. has earned the trust of customers across diverse industries worldwide.

Available Grades of Forged Fittings

Material Standard Available Grades
1 2 3 4 5 6 7 8 9 10
Stainless Steel ASTM A403 WP 304 304H 309 310 316 316L 317L 321 347 904L
ASTM A815 / ASME SA 815 Duplex 2205 - UNS S31803, S32205 Duplex 2304 - UNS S32304 Duplex 2507
Alloy Steel ASTM / ASME A/SA 234 WP 1 WP 11 WP 12 WP 22 WP 91 WP 5 WP 9
Alloy 1100 2011 2014 2024 3003 5052 6061 6063 7075
Carbon Steel ASTM A 234 WPB WPBW WPHY 42 WPHY 46 WPHY 52 WPHY 60 WPHY 65 WPHY 70
ASTM / ASME SB 336 Inconel 600 MONEL 400 ALLOY 20 Inconel 825 Inconel 601 Inconel 625 Nickel 200 Hastelloy C 276 Nickel 201

Forged Fittings Specifications Table

Type Connection Size Range (NPS) Pressure Rating (Class) Standard Application
Elbow (90°/45°) Socket Weld 1/8” - 4” 2000 / 3000 / 6000 ASME B16.11 Direction change in pipe systems
Forged Tee Socket Weld / Threaded 1/8” - 4” 2000 / 3000 / 6000 ASME B16.11 3-way fluid distribution
Forged Cross Socket Weld / Threaded 1/8” - 4” 2000 / 3000 / 6000 ASME B16.11 4-way flow intersection
Coupling (Full/Half/Reducing) Socket Weld / Threaded 1/8” - 4” 2000 / 3000 / 6000 ASME B16.11 Pipe joining or reduction
Forged Pipe Cap Socket Weld / Threaded 1/8” - 4” 2000 / 3000 / 6000 ASME B16.11 End closure for pipe run
Forged Union Threaded 1/8” - 4” 2000 / 3000 ASME B16.11 / MSS-SP-83 Easy disassembly and reconnection
Forged Bushing Threaded 1/8” - 4” 2000 / 3000 ASME B16.11 Reducing pipe size
Forged Nipple Threaded 1/8” - 4” 2000 / 3000 ASME B16.11 / MSS-SP-95 Pipe extensions and connections

Dimensional Standards Table (Forged Fittings)

Fitting Type Size (Inch) Dimensions (mm) Wall Thickness Standard
Outer Diameter (OD) Center-to-End / Length
Elbow 90° 1/2" 21.3 33 3.75 ASME B16.11
3/4" 26.7 38 3.90
1" 33.4 44 4.55
Forged Tee 1/2" 21.3 33 3.75 ASME B16.11
3/4" 26.7 38 3.90
1" 33.4 44 4.55
Forged Cross 1/2" 21.3 33 3.75 ASME B16.11
3/4" 26.7 38 3.90
1" 33.4 44 4.55
Coupling 1/2" 21.3 32 3.75 ASME B16.11
3/4" 26.7 35 3.90
1" 33.4 41 4.55
Forged Pipe Cap 1/2" 21.3 25 3.75 ASME B16.11
3/4" 26.7 28 3.90
1" 33.4 32 4.55
Forged Union 1/2" 21.3 48 3.75 MSS SP-83
3/4" 26.7 53 3.90
1" 33.4 60 4.55
Forged Bushing 1/2" x 1/4" 21.3 x 13.7 22 3.75 ASME B16.11
3/4" x 1/2" 26.7 x 21.3 25 3.90
1" x 3/4" 33.4 x 26.7 28 4.55
Forged Nipple 1/2" 21.3 90 (length) 3.75 ASME B16.11
3/4" 26.7 100 (length) 3.90
1" 33.4 110 (length) 4.55

Pressure-Temperature Ratings Table

Material Grade Pressure-Temperature Ratings (PSI) Standard
-20°F to 100°F 200°F 400°F 600°F 800°F
Stainless Steel ASTM A403 WP304 150 125 110 95 80 ASME B16.5
ASTM A403 WP316 160 135 120 100 85
ASTM A403 WP321 155 130 115 98 82
ASTM A403 WP347 158 132 118 99 83
Carbon Steel ASTM A234 WPB 140 120 100 85 70 ASME B16.9
ASTM A234 WPC 145 123 103 87 72
ASTM A420 WPL6 150 127 107 90 75
ASTM A860 WPHY52 170 140 120 100 85
Duplex Steel ASTM A815 UNS S31803 180 150 130 110 95 ASME B16.9
ASTM A815 UNS S32205 190 160 140 115 100
ASTM A815 UNS S32750 200 170 150 125 110
Nickel Alloy ASTM B366 UNS N06600 210 180 160 140 120 ASME B16.9
ASTM B366 UNS N08825 220 190 170 150 130
ASTM B366 UNS N10276 230 200 180 160 140

Tolerances Table

Material Grade Dimensional Tolerances (mm) Wall Thickness Tolerances (%) Standard
OD (Outer Diameter) ID (Inner Diameter) Length Min Max Average
Stainless Steel ASTM A403 WP304 ±0.5 ±0.4 ±1.0 -12.5% +12.5% ±10% ASME B16.9
ASTM A403 WP316 ±0.6 ±0.5 ±1.2 -12.5% +12.5% ±10%
ASTM A403 WP321 ±0.7 ±0.6 ±1.5 -10% +10% ±8%
ASTM A403 WP347 ±0.8 ±0.7 ±1.8 -10% +10% ±8%
Carbon Steel ASTM A234 WPB ±0.5 ±0.3 ±1.0 -12.5% +12.5% ±10% ASME B16.9
ASTM A234 WPC ±0.6 ±0.4 ±1.2 -12.5% +12.5% ±10%
ASTM A420 WPL6 ±0.7 ±0.5 ±1.4 -12.5% +12.5% ±10%
Duplex Steel ASTM A815 UNS S31803 ±0.6 ±0.4 ±1.2 -10% +10% ±8% ASME B16.9
ASTM A815 UNS S32205 ±0.7 ±0.5 ±1.5 -10% +10% ±8%
ASTM A815 UNS S32750 ±0.8 ±0.6 ±1.8 -8% +8% ±7%
Nickel Alloy ASTM B366 UNS N06600 ±0.5 ±0.3 ±1.0 -12.5% +12.5% ±10% ASME B16.9
ASTM B366 UNS N08825 ±0.6 ±0.4 ±1.2 -10% +10% ±8%
ASTM B366 UNS N10276 ±0.7 ±0.5 ±1.4 -8% +8% ±7%

Applications of Forged Fittings

Forged pipe fittings are essential in high-pressure and high-temperature applications, offering superior strength, durability, and leak-proof connections. They are used in numerous critical industrial systems due to their compact structure and resistance to stress and corrosion.

Industrial Applications:
  • Oil & Gas Industry:

    Used in high-pressure pipelines and process lines for safe transportation of crude oil, gas, and fuels.

  • Petrochemical & Refineries:

    Ideal for systems handling aggressive chemicals, hydrocarbons, and steam under extreme conditions.

  • Power Generation:

    Used in boiler lines, superheaters, and turbine piping where high strength and heat resistance are essential.

  • Chemical & Fertilizer Plants:

    Supports pipelines carrying corrosive chemicals and ensures reliable sealing in high-pressure applications.

  • Marine & Shipbuilding:

    Used in offshore and onshore marine systems, including ballast and bilge piping, due to corrosion resistance.

  • Hydraulic & Pneumatic Systems:

    Integral in pressure-regulated systems for fluid transmission and control in machinery and automation.

  • Construction & Infrastructure:

    Forged fittings ensure secure and compact piping connections in urban development and industrial projects.

  • Aerospace & Defense:

    Preferred for precision and reliability in mission-critical applications involving fuel and fluid systems.

Manufacturing Process of Forged Fittings

The manufacturing process of forged fittings involves precision engineering, high-quality raw materials, and rigorous testing. This process ensures that the fittings deliver superior mechanical strength, pressure handling capability, and dimensional accuracy required for critical applications.

Step-by-Step Manufacturing Process:
  • 1. Raw Material Selection:

    High-quality bars or billets of stainless steel, carbon steel, duplex, or special alloys are chosen based on the required chemical and mechanical properties.

  • 2. Heating & Forging:

    The raw material is heated in a furnace to forging temperature and then forged under high pressure to shape into elbows, tees, unions, or other forged fitting forms.

  • 3. Trimming & Rough Machining:

    Flash or excess material is trimmed, and rough machining is performed to bring the fittings close to their final dimensions.

  • 4. Heat Treatment:

    Heat treatment such as annealing or normalizing is carried out to enhance strength, ductility, and corrosion resistance of the fittings.

  • 5. Precision Machining:

    CNC machines are used to finish the fittings to exact tolerances and surface finishes, ensuring proper thread cutting or socket depths.

  • 6. Inspection & Testing:

    Each forged fitting undergoes dimensional inspection, hydrostatic pressure testing, and non-destructive tests like ultrasonic or radiographic testing.

  • 7. Surface Finishing:

    Fittings are cleaned, descaled, or coated with rust-preventive treatments such as pickling, passivation, or galvanization.

  • 8. Marking, Packaging & Dispatch:

    Final fittings are marked with size, material grade, and heat number, packed securely, and dispatched to ensure safe delivery.

Types of Forged Fittings

Forged Elbow (90° & 45°)

A Forged Elbow is a high-pressure fitting used to change the direction of flow in piping systems. Available in 90-degree and 45-degree angles, these elbows are manufactured in socket weld and threaded end connections, ensuring leak-free operation under extreme pressure and temperature conditions. They are widely used in oil & gas, chemical processing, and power generation industries for compact, durable, and corrosion-resistant piping systems.

Forged Elbow
Key Features:
  • 1. Available in 90° and 45° angles for direction change in piping layouts.
  • 2. Designed in Socket Weld and Threaded end types.
  • 3. Manufactured in pressure classes 2000#, 3000#, 6000#.
  • 4. Made from Stainless Steel, Carbon Steel, Alloy Steel, Duplex & Super Duplex, and more.
  • 5. Ideal for high-pressure and corrosive applications.

Dimensions & Specifications Table (ASME B16.11 Standard):

Nominal Pipe Size (NPS) OD (mm) Center-to-End (90° Elbow) Center-to-End (45° Elbow) Socket Depth (mm) Pressure Class
1/2" 21.3 33 25 10 3000#
3/4" 26.7 38 28 13 3000#
1" 33.4 44 32 13 3000#
1 1/2" 48.3 57 38 16 3000#
2" 60.3 64 44 19 3000#
3" 88.9 86 70 25 3000#


Forged Tee (Equal & Reducing)

A Forged Tee is a type of high-pressure pipe fitting used to combine or divide fluid flow. Available in both Equal Tee and Reducing Tee types, it is designed for socket weld and threaded end connections. Forged tees are used in a variety of applications where compact piping and high strength are required—especially in oil & gas, petrochemical, and power generation industries.

Forged Tee
Key Features:
  • 1. Available in Equal Tee and Reducing Tee configurations.
  • 2. Socket weld and threaded end types for leak-proof installations.
  • 3. Suitable for pressure ratings: 2000#, 3000#, 6000#.
  • 4. Manufactured from Stainless Steel, Carbon Steel, Alloy Steel, and Special Alloys.
  • 5. Ideal for distributing or collecting fluid flow in various pipeline systems.

Dimensions & Specifications Table (ASME B16.11 Standard):

Nominal Pipe Size (NPS) OD (mm) Center-to-End (Run) (A) Center-to-End (Branch) (B) Socket Depth (mm) Pressure Class
1/2" 21.3 33 25 10 3000#
3/4" 26.7 38 28 13 3000#
1" 33.4 44 32 13 3000#
1 1/2" 48.3 57 38 16 3000#
2" 60.3 64 44 19 3000#
3" 88.9 86 70 25 3000#


Forged Cross (Equal & Reducing)

A Forged Cross is a four-way pipe fitting used to divide or combine flow in a piping system. It has one inlet and three outlets (or vice versa), all positioned at 90-degree angles. Available in both Equal Cross and Reducing Cross configurations, forged crosses are widely used in high-pressure and high-temperature applications. They are typically socket weld or threaded and are vital for process piping in refineries, petrochemical plants, and power stations.

Forged Cross
Key Features:
  • 1. Available in Equal and Reducing configurations for various piping needs.
  • 2. Socket weld and threaded ends for secure, high-pressure connections.
  • 3. Common pressure ratings: 2000#, 3000#, 6000#.
  • 4. Made from durable materials like Stainless Steel, Carbon Steel, and High-Alloy Steels.
  • 5. Used in critical flow distribution or collection systems in industrial plants.

Dimensions & Specifications Table (ASME B16.11 Standard):

Nominal Pipe Size (NPS) OD (mm) Center-to-End (Run) (A) Center-to-End (Branch) (B) Socket Depth (mm) Pressure Class
1/2" 21.3 33 25 10 3000#
3/4" 26.7 38 28 13 3000#
1" 33.4 44 32 13 3000#
1 1/2" 48.3 57 38 16 3000#
2" 60.3 64 44 19 3000#


Forged Union (Threaded & Socket Weld)

A Forged Union is a type of forged pipe fitting used to join two pipes while allowing easy future disconnection without cutting the pipe. It consists of three parts — a male end, a female end, and a nut — which securely compress and seal the connection. Unions are available in Socket Weld and Threaded forms and are widely used in applications requiring quick installation and removal, such as instrumentation, gas lines, and process piping.

Forged Union
Key Features:
  • 1. Allows disconnection and re-connection without disturbing the piping system.
  • 2. Available in threaded (NPT/BSP) and socket weld ends for various connection types.
  • 3. Common pressure classes: 2000#, 3000#, and 6000#.
  • 4. Precision machined to ensure leak-proof sealing under pressure.
  • 5. Widely used in oil & gas, chemical, and power industries.

Dimensions & Specifications Table (MSS SP-83 / ASME B16.11):

Nominal Pipe Size (NPS) End Type Outside Diameter (OD) Length (Face to Face) Pressure Rating
1/2" Socket Weld 21.3 mm 48 mm 3000#
3/4" Threaded 26.7 mm 53 mm 3000#
1" Socket Weld 33.4 mm 60 mm 3000#
1 1/2" Threaded 48.3 mm 70 mm 3000#
2" Socket Weld 60.3 mm 82 mm 3000#


Swage Nipple (Concentric & Eccentric)

A Swage Nipple is a type of forged fitting used to connect pipes of different diameters. It comes in two configurations: Concentric (aligned centerlines) and Eccentric (offset centerlines), allowing smooth transitions between different pipe sizes. Swage nipples are available with Plain Ends (PE), Beveled Ends (BE), or Threaded Ends (NPT/BSP), making them versatile for high-pressure and high-temperature piping systems.

Swage Nipple
Key Features:
  • 1. Connects pipes of unequal diameters for a smooth transition.
  • 2. Available in Concentric and Eccentric types.
  • 3. End types: Beveled End, Plain End, or Threaded (NPT/BSP).
  • 4. Designed for high-pressure, high-temperature, and corrosive environments.
  • 5. Widely used in oil & gas, power, chemical, and industrial piping systems.

Dimensions & Specifications Table (ASME B16.11 / MSS SP-95):

Size (Large End × Small End) Type Length (mm) End Connection Pressure Rating
2" × 1" Concentric 120 mm BE × NPT 3000#
3" × 1 1/2" Eccentric 150 mm BE × NPT 3000#
4" × 2" Concentric 180 mm PE × PE 3000#
6" × 3" Eccentric 200 mm PE × NPT 6000#
8" × 4" Concentric 250 mm BE × BE 6000#


Adaptor (Threaded / Socket Weld)

A Forged Adaptor is a fitting used to connect pipes of different types or sizes, often transitioning between threaded and socket weld connections or male-to-female thread forms. These fittings allow for easy disassembly and reconnection of pipelines during maintenance. Adaptors are commonly used in systems where versatility, ease of installation, and reusability are crucial, such as in oil & gas, petrochemical, and instrumentation piping networks.

Adaptor
Key Features:
  • 1. Used for transitioning between different pipe end types or sizes.
  • 2. Available in Male × Female, Male × Male, or Threaded × Socket Weld configurations.
  • 3. Suitable for quick assembly/disassembly of piping systems.
  • 4. Precision-machined to ensure tight and leak-proof connections.
  • 5. Widely used in oil & gas, chemical, power, and instrumentation pipelines.

Dimensions & Specifications Table (ASME B16.11 / MSS SP-95):

Adaptor Type Size (Inch) Length (mm) End Connection Pressure Rating
Male × Female 1/2" 45 mm NPT × NPT 3000#
Male × Socket Weld 3/4" 50 mm NPT × SW 3000#
Threaded × Threaded 1" 58 mm BSPT × BSPT 6000#
Female × Socket Weld 1 1/2" 65 mm NPT × SW 3000#
Male × Male 2" 72 mm NPT × NPT 6000#


Coupling (Full & Half)

A Forged Coupling is a short length of pipe used to connect two pipes or fittings in a straight line. Available in Full Coupling (connects two pipes) and Half Coupling (connects a pipe to a fitting or branch), these fittings are vital for assembling and disassembling piping systems. Couplings are manufactured in both Threaded and Socket Weld forms and are widely used in industries where high-pressure and leak-proof connections are required.

Coupling
Key Features:
  • 1. Available in Full and Half configurations for different connection needs.
  • 2. Designed for both Threaded and Socket Weld end types.
  • 3. Ensures leak-proof, high-strength connections in critical piping systems.
  • 4. Manufactured using materials like stainless steel, carbon steel, and alloy steel.
  • 5. Commonly used in oil & gas, chemical, power, and hydraulic applications.

Dimensions & Specifications Table (ASME B16.11):

Coupling Type Size (Inch) Length (mm) End Connection Pressure Rating
Full Coupling 1/2" 32 mm Socket Weld 3000#
Half Coupling 3/4" 26 mm Threaded (NPT) 3000#
Full Coupling 1" 41 mm Socket Weld 6000#
Half Coupling 1 1/2" 38 mm Threaded (BSPT) 6000#
Full Coupling 2" 51 mm Socket Weld 3000#


Forged Pipe Cap

A Forged Pipe Cap is a type of forged fitting used to terminate the end of a pipe. It provides a secure closure to piping systems and prevents leakage, debris ingress, or damage to open pipe ends. These caps are typically installed using socket weld or threaded connections and are widely used in high-pressure, high-temperature applications across industries such as oil & gas, chemical, power generation, and petrochemical plants.

Forged Pipe Cap
Key Features:
  • 1. Used to permanently or temporarily seal the end of a pipe or fitting.
  • 2. Available in socket weld and threaded end connections.
  • 3. Suitable for high-pressure and high-temperature environments.
  • 4. Manufactured in stainless steel, carbon steel, alloy steel, and exotic materials.
  • 5. Commonly used in oil & gas, petrochemical, and industrial piping systems.

Dimensions & Specifications Table (ASME B16.11):

Size (Inch) Outer Diameter (OD) Height (mm) End Connection Pressure Rating
1/2" 21.3 mm 25 mm Socket Weld 3000#
3/4" 26.7 mm 28 mm Threaded (NPT) 3000#
1" 33.4 mm 32 mm Socket Weld 6000#
1 1/2" 48.3 mm 38 mm Threaded 6000#
2" 60.3 mm 44 mm Socket Weld 3000#