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Specialized Products

ARK Stainless Inc. is a leading Manufacturer and Exporter of high-quality Specialized Products, headquartered in Mumbai, India. Our specialized components are meticulously engineered to meet the highest industry standards, ensuring precision, durability, and superior performance.

We offer a diverse range of specialized fittings and components, including Mono Flanges, Bull Plugs, Adaptors, Refractory Anchors, Thermowells, and Couplings. These products are designed for critical applications across industries such as Oil & Gas, Petrochemicals, Power Plants, Marine, and Heavy Engineering. Manufactured with strict adherence to international quality standards, our specialized products enhance system efficiency, safety, and longevity in challenging industrial environments.

Mono Flange

A Mono Flange is a compact, lightweight, and high-performance piping component used to replace multiple connections with a single unit, minimizing leak paths. It integrates valves and fittings into one compact design, reducing installation time and maintenance costs while improving system integrity. Mono Flanges are widely used in applications requiring high-pressure, high-temperature, and corrosive resistance, particularly in Oil & Gas, Petrochemical, and Power Generation industries.

These flanges are designed with various configurations, including single block, double block & bleed (DBB), and vent options. They are available in stainless steel, duplex steel, carbon steel, and high-alloy materials, ensuring excellent corrosion resistance and mechanical strength for critical operations.

Mono Flange
Key Features:
  • 1. Compact and lightweight design reduces installation space and weight.
  • 2. Single, Double Block & Bleed (DBB), and Vent configurations available.
  • 3. Eliminates multiple connections, reducing the risk of leaks.
  • 4. Suitable for high-pressure and high-temperature applications.
  • 5. Available in Stainless Steel, Duplex Steel, Carbon Steel, and High-Alloy materials.

Standard Dimensions & Specifications (ASME B16.5)

Nominal Pipe Size (NPS) Pressure Rating Flange OD Bolt Circle Diameter Number of Bolt Holes Type
1/2" 150# 90 mm 60.3 mm 4 Single Block
1" 300# 125 mm 82.5 mm 4 Double Block & Bleed
2" 600# 165 mm 127 mm 8 Single Block
3" 900# 210 mm 168.3 mm 8 Double Block & Bleed

Material Grades & Applications

Material Type Grade Common Applications
Stainless Steel ASTM A182 F304, F316 Oil & gas, chemical processing, offshore platforms
Carbon Steel ASTM A105 High-pressure piping, petrochemical plants
Duplex Steel ASTM A182 F51, F53 Marine, desalination, aggressive environments
High-Alloy Steel ASTM A182 F44, F55 Extreme temperature and pressure applications


Bull Plug

A Bull Plug is a tubular pipe fitting used to close the end of a pipeline or casing. It is commonly used in the oil and gas industry for pressure testing, isolation, or as a temporary or permanent pipeline closure.

Bull Plugs are manufactured in various materials, including stainless steel, carbon steel, and alloy steel, to suit different operational conditions. They come in different end connections such as threaded, beveled, or grooved, ensuring compatibility with diverse piping systems.

Bull Plug
Key Features:
  • 1. Used to seal or terminate pipe ends in oil and gas applications.
  • 2. Available in threaded, beveled, and grooved end configurations.
  • 3. Manufactured from stainless steel, carbon steel, and alloy steel.
  • 4. Designed to withstand high pressure and harsh environments.
  • 5. Commonly used in oilfields, pipelines, and high-pressure systems.

Dimensions & Specifications Table:

Nominal Pipe Size (NPS) Outside Diameter (OD) End Connection Overall Length (L)
1/2"21.3 mmThreaded50 mm
3/4"26.7 mmBeveled60 mm
1"33.4 mmGrooved75 mm
2"60.3 mmThreaded100 mm
4"114.3 mmBeveled150 mm

Pressure Ratings & Material Standards:

Material Pressure Class (PSI) Temperature Rating (°C) ASTM Standard
Stainless Steel (SS 304/316)2000 PSI-20°C to 650°CASTM A182
Carbon Steel (A105)3000 PSI-29°C to 427°CASTM A105
Alloy Steel (A182 F22)5000 PSI-46°C to 593°CASTM A182
Duplex Steel (2205/2507)6000 PSI-50°C to 315°CASTM A815


Adaptors

Adaptors are essential pipe fittings used to connect different types of piping components, ensuring seamless flow across varying diameters, materials, or connection types. These fittings help in smooth transitions in piping systems used in industries like oil & gas, chemical processing, water treatment, and power plants.

Adaptors are available in threaded, welded, and flanged configurations, made from high-quality materials such as carbon steel, stainless steel, alloy steel, and copper-nickel. They comply with ASME, ANSI, and ASTM standards for durability and efficiency.

Adaptors
Key Features:
  • 1. Provides a seamless transition between different pipe sizes or materials.
  • 2. Available in threaded, welded, and flanged types.
  • 3. Manufactured following ASME, ANSI, and ASTM standards.
  • 4. Commonly used in oil & gas, chemical, and water treatment industries.
  • 5. Available in carbon steel, stainless steel, alloy steel, and copper-nickel.

Dimensions & Specifications Table (ASME Standard):

Nominal Pipe Size (NPS) Connection Type Outer Diameter (OD) Wall Thickness Length
1"Threaded33.4 mm3.38 mm50 mm
2"Welded60.3 mm3.91 mm75 mm
3"Flanged88.9 mm5.49 mm100 mm
4"Threaded114.3 mm6.02 mm125 mm
6"Welded168.3 mm7.11 mm150 mm

Pressure Ratings & Material Standards:

Material Pressure Class (PSI) Temperature Rating (°C) ASTM Standard
Carbon Steel (A105)2000 PSI-29°C to 425°CASTM A105
Stainless Steel (SS 304/316)1500 PSI-20°C to 650°CASTM A182
Alloy Steel (A182 F11/F22)2500 PSI-46°C to 593°CASTM A182
Copper-Nickel (Cu-Ni 90/10)1000 PSI-50°C to 300°CASTM B466


Refractory Anchors

Refractory Anchors are crucial components used to secure refractory linings in industrial furnaces, kilns, reactors, and other high-temperature processing units. These anchors ensure the stability and durability of refractory linings by holding them in place and preventing structural deformation due to thermal expansion and mechanical stress.

They are available in various shapes such as V-shaped, Y-shaped, U-shaped, and Corrugated Anchors. Common materials used include Stainless Steel (SS 304, SS 310, SS 316), Carbon Steel, Inconel, and other heat-resistant alloys, designed to withstand extreme temperatures and corrosive environments.

Refractory Anchors
Key Features:
  • 1. Provides structural stability to refractory linings.
  • 2. Available in various shapes: V, Y, U, and Corrugated Anchors.
  • 3. Manufactured using heat-resistant alloys for high-temperature applications.
  • 4. Used in furnaces, kilns, reactors, and incinerators.
  • 5. Resistant to thermal expansion, corrosion, and mechanical stress.

Dimensions & Specifications:

Anchor Type Material Wire Diameter (mm) Length (mm) Max Operating Temperature (°C)
V-Anchor SS 310 5 mm 50 - 300 1100°C
Y-Anchor Inconel 601 6 mm 75 - 350 1250°C
U-Anchor SS 304 4 mm 50 - 250 900°C
Corrugated Anchor Carbon Steel 5.5 mm 80 - 400 850°C

Applications & Industry Usage:

Industry Application Operating Conditions
Steel Industry Blast Furnaces & Ladle Furnaces High temperature & mechanical stress
Cement Plants Rotary Kilns & Clinker Coolers Thermal cycling & abrasion
Petrochemical Industry Reformers & Crackers Corrosive gases & extreme heat
Power Plants Boilers & Incinerators Flue gas corrosion & high-pressure conditions


Thermowell

A Thermowell is a protective barrier used to safeguard temperature sensors such as thermocouples and RTDs from high pressure, corrosive fluids, and mechanical damage in industrial applications. It extends the lifespan of sensors by providing an isolation barrier between the measuring instrument and the process fluid.

Thermowells are widely used in industries like oil & gas, chemical processing, power plants, and food & beverage. They are available in materials such as stainless steel, carbon steel, Hastelloy, and Inconel, adhering to standards like ASME PTC 19.3, ASTM A182, and DIN 43772.

Thermowell
Key Features:
  • 1. Provides protection to temperature sensors in high-pressure and corrosive environments.
  • 2. Available in threaded, flanged, and welded configurations.
  • 3. Compatible with various temperature measuring instruments.
  • 4. Designed as per ASME PTC 19.3 standards for accuracy and reliability.
  • 5. Used in industries requiring precise temperature monitoring and control.

Dimensions & Specifications Table (ASME PTC 19.3 Standard):

Nominal Bore (NB) Insertion Length (U) Shank Diameter Process Connection Material
1/2" 100 mm 12 mm Threaded SS 304
3/4" 150 mm 16 mm Flanged SS 316
1" 200 mm 22 mm Welded Hastelloy
1 1/2" 250 mm 27 mm Threaded Inconel 600

Pressure Ratings & Material Standards:

Material Pressure Class (PSI) Temperature Rating (°C) ASTM Standard
Stainless Steel 304 3000 PSI -50°C to 650°C ASTM A182
Stainless Steel 316 4000 PSI -50°C to 870°C ASTM A479
Hastelloy C276 5000 PSI -100°C to 1100°C ASTM B574
Inconel 600 6000 PSI -200°C to 1250°C ASTM B166


Couplings

A Pipe Coupling is a short length of pipe used to connect two pipes together, ensuring a secure and leak-proof joint. Couplings are essential for pipeline repair, extension, and redirection in various industries, including oil & gas, water supply, chemical processing, and power plants.

These fittings come in various types such as full coupling, half coupling, and reducing coupling. They are available in multiple materials like stainless steel, carbon steel, alloy steel, and PVC, complying with ASME, ASTM, and API standards.

Pipe Coupling
Key Features:
  • 1. Provides a secure and leak-proof connection.
  • 2. Available in full, half, and reducing variations.
  • 3. Resistant to corrosion and high pressure.
  • 4. Used in plumbing, pipelines, and industrial applications.
  • 5. Manufactured as per ASME, ASTM, and API standards.

Dimensions & Specifications:

Type Size (NPS) Length (mm) Wall Thickness Material
Full Coupling1"50 mmSch 40SS 304
Half Coupling2"40 mmSch 80CS A105
Reducing Coupling3" x 2"60 mmSch 160Duplex 2205
Full Coupling4"80 mmXXSAlloy Steel A182 F11