ARK Stainless Inc. is a manufacturer, supplier and exporter of Stainless Steel Forged Fittings in India, offering a complete range of socket-weld and threaded forged fittings for high-pressure piping systems. We supply stainless steel forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, adapters and swage nipples in various sizes and pressure classes for industrial applications.
Our stainless steel forged fittings are available in ASTM A182 F304, F304L, F316, F316L, F316Ti, F321, F347, F347H and F904L grades and are manufactured in accordance with ASME B16.11, MSS SP-79, MSS SP-83, MSS SP-95 and BS 3799 standards. These fittings are produced from forged bar stock, resulting in improved strength, dimensional accuracy and pressure-handling capability compared to fabricated fittings.
We supply stainless steel socket weld forged fittings and threaded forged fittings in pressure classes 2000#, 3000#, 6000# and 9000# for process piping systems, steam lines, utility networks and high-pressure fluid handling applications. Threaded connections are available in NPT, BSP and BSPT standards to suit different project and piping requirements.
Stainless steel forged fittings are widely used in oil refineries, petrochemical plants, chemical processing units, offshore platforms, power generation projects, water treatment facilities and marine piping systems. Grades such as SS 316 and SS 316L are commonly selected for corrosive environments, while SS 304 and SS 304L forged fittings are used in general industrial and process applications.
All forged fittings are supplied with material test certificates, heat number traceability and inspection reports as per project requirements. Custom sizes, special material grades and export packaging can also be provided for domestic and international orders.
Stainless steel forged fittings are manufactured in different configurations to suit various piping layouts and connection requirements. The most commonly used fittings include forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, adapters and swage nipples. Each type of forged fitting is selected based on the flow requirement, connection type and piping layout. Each fitting serves a specific purpose within a piping system.
Forged elbows change the direction of flow within a piping system, while forged tees create branch connections from the main pipeline. Forged couplings and unions connect pipe sections and make maintenance and replacement work easier. Forged caps seal the ends of pipelines to prevent leakage or contamination. Bushings and adapters connect pipes and fittings with different thread sizes, while swage nipples provide a smooth transition between different pipe diameters in high-pressure process piping systems.
ARK Stainless Inc. is a manufacturer, supplier and exporter of stainless steel forged pipe fittings, offering socket weld and threaded fittings in ASTM A182 grades for oil & gas, petrochemical, power generation and process piping applications.
Stainless steel forged fittings are widely used in oil & gas plants, refineries, petrochemical facilities, chemical processing units, power generation projects and marine piping systems. These fittings are commonly installed in high-pressure process piping, steam lines, utility networks and instrumentation systems where corrosion resistance and dependable connections are required.
These fittings are commonly installed in oil refineries, petrochemical plants, offshore platforms, chemical processing units, power generation facilities, fertiliser plants, marine systems, water treatment plants, pharmaceutical manufacturing units and food processing industries. They are also used in steam distribution networks, compressed air systems, instrumentation lines, hydraulic systems and industrial fluid handling applications.
Grades such as ASTM A182 F316 and F316L are often selected for corrosive service conditions, while F304 and F304L forged fittings are widely used in general industrial piping systems.
Stainless steel forged fittings are manufactured in different pressure classes depending on the service conditions and operating requirements of the piping system. The selection of the pressure class generally depends on factors such as working pressure, operating temperature and process media.
Threaded forged fittings are commonly available in Class 2000, Class 3000 and Class 6000 pressure ratings. Socket-weld forged fittings are generally supplied in Class 3000, Class 6000 and Class 9000 pressure ratings.
These pressure classes are widely specified for high-pressure piping systems used in refineries, chemical plants, power stations, offshore installations and process industries where reliable leak-tight connections are required.
Socket-weld forged fittings are generally preferred for high-pressure services, while threaded forged fittings are commonly used where easy installation and maintenance are important.
Socket-weld forged fittings are designed for welding connections and are generally preferred in high-pressure and high-temperature services. The pipe is inserted into the socket portion of the fitting and welded externally, providing a strong and permanent connection. Socket weld fittings are widely used in steam lines, process piping and critical industrial applications where leakage must be minimised.
Threaded forged fittings are manufactured with NPT, BSP or BSPT threads and do not require welding during installation. They are commonly used in small-bore piping systems, utility lines, compressed air systems and applications where periodic dismantling or maintenance may be required. Threaded fittings offer easier installation and replacement, making them suitable for non-critical and moderate-pressure piping systems.
ARK Stainless Inc. manufactures socket weld and threaded forged fittings in ASTM A182 F304, F304L, F316, F316L, F321, F347 and F904L grades for high-pressure industrial piping applications. All fittings are produced in accordance with ASME B16.11 requirements.
| C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|
| 304 | 0.07max | 2.0max | 0.75max | 0.045max | 0.03max | min: 18.0 max: 20.0 | - | min: 8.0 max: 10.5 | — |
| 304L | 0.03max | 2.0max | 0.75max | 0.045max | 0.03max | min: 18.0 max: 20.0 | - | min: 8.0 max: 12.0 | 0.10 max |
| 304H | min: 18.0 max:20.0 |
min: 8.0 max: 10.5 |
min: 0.04 max:0.10 |
0.75 max |
2.0 max |
0.045 max |
- | 0.03 max |
0.10 max |
| 309 | 0.20 max | 2 max | 1 max | 0.045 max | 0.030 max | 23 max | - | 14 max | – |
| 310 | 0.25 max | 2 max | 1.50 max | 0.045 max | 0.03 max | 24 – 26 | - | 19 – 22 | – |
| 310S | 0.08 max | 2 max | 1.50 max | 0.045 max | 0.03 max | 24 – 26 | - | 19 – 22 | – |
| 316 | 0.08 max |
2.0 max |
0.75 max |
0.045 max |
0.03 max |
min: 16.0 max: 18.0 |
min: 2.0 max: 3.0 |
min: 10.0 max: 14.0 |
0.10 max |
| 316L | 0.03 max |
2.0 max |
0.75 max |
0.045 max |
0.03 max |
min: 16.0 max: 18.0 |
min: 2.0 max: 3.0 |
min: 10.0 max: 14.0 |
0.10 max |
| 316TI | - | - | - | - | - | 16.0 | 2.00 | 10.0 | - |
| 0.08 | 2 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.1 | |
| 317 | 0.08 max | 2 max | 1 max | 0.040 max | 0.03 max | 18 – 20 | 3 – 4 | 11 – 14 | - |
| 317L | 0.035 max | 2 max | 1 max | 0.040 max | 0.03 max | 18 – 20 | 3 – 4 | 11 – 15 | - |
| 321 | max:0.08 | max:2.0 | max:0.75 | max:0.045 | max:0.03 | min:17.0 max:19.0 |
– | min: 9.0 max:12.0 |
max:0.10 |
| 321H | min:0.04 max:0.10 |
max:2.0 | max:0.75 | max:0.045 | max:0.03 | min:17.0 max:19.0 |
– | min: 9.0 max:12.0 |
max:0.10 |
| 347 | 0.08 max | 2.0 max | 0.75 max | 0.04 max | 0.03 max | min: 17.0 max: 20.0 |
min:10x C max: 1.0 |
min: 9.0 max: 13.0 |
– |
| 347H | min: 0.04 max: 0.10 |
2.0 max | 0.75 max | 0.03 max | 0.03 max | min: 17.0 max: 20.0 |
min:10x C max: 1.0 |
min: 9.0 max: 13.0 |
– |
| 904L | 0.02 max | 4.0 – 5.0 | – | 0.045 max | 0.035 max | 19.0 – 23.0 | 23.0 – 28.0 | 2.0 max | – |
| Grade | Tensile Strength (ksi / MPa) | Yield Strength 0.2% (ksi / MPa) | Elongation (%) | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 304 | 75 / 515 | 30 / 205 | 40 | 201 | 92 |
| 304L | 70 / 485 | 25 / 170 | 40 | 201 | 92 |
| 304H | 75 / 515 | 30 / 205 | 40 | 201 | 92 |
| 309 | 89.9 / 620 | 45 / 310 | 45 | – | – |
| 310 | 75 / 515 | 30 / 205 | 35 | – | – |
| 310S | 75 / 515 | 30 / 205 | 35 | – | – |
| 316 | 75 / 515 | 30 / 205 | 40 | 217 | 95 |
| 316L | 70 / 485 | 25 / 170 | 40 | 217 | 95 |
| 316Ti | 515 MPa | 205 MPa | 35 | 205 | 75 |
| 317 | 75 / 515 | 30 / 205 | 35 | – | – |
| 317L | 75 / 515 | 30 / 205 | 35 | – | – |
| 321 / 321H | 75 / 515 | 30 / 205 | 40 | 217 | – |
| 347 / 347H | 75 / 515 | 30 / 205 | 40 | 201 | 95 |
| 904L | 490 MPa | 220 MPa | 36 | 150 | 70–90 (typical) |
ARK Stainless Inc. manufactures, supplies and exports SS 304, SS 304L and SS 304H Forged Fittings for industrial piping applications. Our product range includes forged elbows, forged tees, forged couplings, forged unions, forged caps, forged plugs, forged bushings, forged crosses and swage nipples in socket weld and threaded configurations. All fittings are manufactured to ASTM A182 and ASME B16.11 specifications.
SS 304 forged fittings are widely used in general process piping applications due to their good corrosion resistance, strength and fabrication properties. SS 304L forged fittings are preferred for welded piping systems where lower carbon content helps minimise the risk of carbide precipitation after welding. SS 304H forged fittings are commonly specified for elevated temperature service, where higher carbon content provides improved strength at higher operating temperatures.
Refineries, petrochemical plants, chemical processing units, power generation projects, pharmaceutical facilities, paper and pulp mills, textile plants, fertiliser units and bulk liquid handling systems regularly use these stainless steel forged fittings in their piping networks. Common applications include steam lines, utility piping, compressed air systems, instrumentation networks, heat exchangers and process equipment requiring threaded or socket weld connections.
We manufacture and supply ASTM A182 F304, F304L and F304H forged fittings in pressure classes 2000#, 3000#, 6000# and 9000#. Threaded connections are available in NPT, BSP and BSPT standards for refinery, petrochemical, power generation and industrial piping applications.
Many process plants, utility systems and water treatment facilities use ASTM A182 F304 Forged Fittings for stainless steel piping applications. F304 forged fittings provide good corrosion resistance, strength and fabrication properties for threaded and socket-weld connections operating under moderate pressure and temperature conditions.
ASTM A182 F304L Forged Fittings contain lower carbon content compared to F304, making them suitable for welded piping systems where resistance to sensitisation is important. F304L socket weld and threaded forged fittings are commonly used in pharmaceutical plants, chemical processing units, food processing facilities and stainless steel process piping networks.
ASTM A182 F304H Forged Fittings are commonly selected for elevated temperature applications requiring improved strength at higher operating temperatures. These forged fittings are frequently used in refineries, power generation facilities, steam systems and process plants processing high-temperature fluids and gases.
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| SS 304 | S30400 | 1.4301 | Z7CN18-09 | X5CrNi18-10 | SUS 304 | 304S31 | 08?18?10 |
| SS 304L | S30403 | 1.4306/1.4307 | Z3CN18-10 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 304S11 | 03?18?11 |
| SS 304H | S30409 | 1.4301 | - | - | - | - | - |
We manufacture and supply SS 304, SS 304L and SS 304H forged fittings in accordance with ASTM A182 / ASME SA182 specifications. Our stainless steel socket weld and threaded forged fittings are available in multiple pressure classes and dimensional standards for refinery, petrochemical, power generation and industrial piping applications.
SS 304 forged fittings offer a good combination of strength, toughness and corrosion resistance, making them suitable for a wide range of industrial piping applications. The material performs well in moderately corrosive environments and provides resistance to oxidation, pitting and crevice corrosion under normal operating conditions.
SS 304L forged fittings contain lower carbon content, which helps minimise carbide precipitation during welding. Many fabricators and contractors use SS 304L forged fittings in welded piping systems for chemical processing, pharmaceutical manufacturing and food processing applications.
SS 304H forged fittings contain higher carbon content than standard 304 grades, providing improved strength at elevated temperatures. These forged fittings are commonly used in steam systems, refineries, power generation facilities and process plants operating at higher temperatures.
ARK Stainless Inc. is a manufacturer, supplier and exporter of SS 309, SS 310 and SS 310S Forged Fittings in India, offering socket-weld and threaded forged fittings for high-temperature and corrosion-resistant piping applications. Our product range includes forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses and swage nipples manufactured in accordance with ASTM A182 and ASME B16.11 standards.
SS 309 forged fittings are commonly used in applications exposed to elevated temperatures and intermittent heating cycles. SS 310 and SS 310S forged fittings offer higher chromium and nickel content, making them suitable for furnace systems, heat treatment equipment, thermal processing units, boilers, heat exchangers and high-temperature process piping systems. These grades provide good oxidation resistance and maintain their strength at elevated operating temperatures.
The combination of strength, fabrication properties and resistance to scaling at high temperatures makes SS 309, 310 and 310S forged fittings suitable for refineries, petrochemical plants, power generation facilities, chemical processing units and industrial heating systems. These forged fittings are available in threaded and socket weld configurations for high-pressure piping networks.
To verify material quality and compliance with project specifications, we carry out PMI (Positive Material Identification), chemical analysis, mechanical testing, tensile testing and dimensional inspection. We also provide material test certificates, heat number traceability records and inspection reports for domestic and export orders as required by the project specification.
ASTM A182 F309 Forged Fittings are suitable for piping systems operating under elevated temperatures and intermittent heating cycles. The higher chromium and nickel content compared to SS 304 grades provides improved resistance to oxidation and scaling at high temperatures. Industries use F309 forged fittings in furnace equipment, thermal processing plants, heat recovery systems and industrial heating applications where piping systems experience continuous temperature fluctuations.
ASTM A182 F310 Forged Fittings are widely used in high-temperature process piping systems where resistance to oxidation and heat is important. The alloy maintains good mechanical strength at elevated temperatures and is commonly selected for heat treatment plants, boilers, kilns, combustion chambers and petrochemical processing equipment. F310 forged fittings are suitable for applications involving hot gases, thermal cycling and high-temperature fluid service.
ASTM A182 F310S Forged Fittings are the low-carbon version of F310 stainless steel and are often selected for applications involving welding and elevated temperatures. The reduced carbon content helps minimise carbide precipitation during fabrication and welding operations. F310S forged fittings are frequently used in refinery piping, furnace components, heat exchangers, thermal oxidisers and process plants operating at high temperatures.
SS 309, SS 310 and SS 310S forged fittings offer a combination of strength, toughness and oxidation resistance at elevated temperatures. The higher chromium and nickel content helps these grades perform reliably in high-temperature service. SS 310 and SS 310S forged fittings are commonly selected for thermal processing equipment, furnace piping, heat treatment systems and industrial heating applications where resistance to scaling and temperature-related deformation is important.
We manufacture SS 309, SS 310 and SS 310S forged fittings in pressure classes 2000#, 3000#, 6000# and 9000# in accordance with ASME B16.11 requirements. Our threaded forged fittings are offered in Class 2000#, 3000# and 6000#, while socket weld forged fittings are manufactured in Class 3000#, 6000# and 9000#. The required pressure class depends on the operating pressure, temperature and service conditions of the piping system.
We manufacture and supply SS 309, SS 310 and SS 310S forged fittings in socket weld and threaded types for industrial piping systems. Socket-weld forged fittings are commonly used where welding forms part of the piping installation, while threaded forged fittings are often selected for smaller pipe sizes and applications that require easier assembly or future maintenance. NPT, BSP and BSPT threaded connections are available to match different piping standards and project specifications.
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| SS 309 | S30900 | 1.4828 | - | - | SUS 309 | - | - |
| SS 310 | S31000 | 1.4841 / 1.4307 | - | X15CrNi25-20 | SUS 310 | 310S24 | 20Ch25N20S2 |
| SS 310S | S31008 | 1.4845 | - | - | SUS 310S | - | 20Ch23N18 |
ARK Stainless Inc. is a manufacturer, supplier and exporter of SS 316, SS 316L and SS 316Ti Forged Fittings in India. We manufacture socket-weld and threaded forged fittings for process piping systems, utility lines, instrumentation networks and industrial fluid handling applications.
SS 316 forged fittings contain molybdenum, which improves resistance to chlorides and corrosive process fluids. Fabricators and piping contractors often select SS 316L forged fittings for welded piping systems because the lower carbon content helps reduce carbide precipitation after welding. Engineers frequently choose SS 316Ti forged fittings for piping systems operating at higher temperatures for extended periods due to the titanium-stabilised composition.
SS 316, SS 316L and SS 316Ti forged fittings are commonly used in process piping systems, utility lines, instrumentation networks and industrial fluid transfer applications. These forged fittings are supplied for chemical plants, refineries, offshore platforms, pharmaceutical facilities, pulp and paper mills, water treatment projects and power generation units. We carry out PMI testing, chemical analysis, mechanical testing and dimensional inspection, according to project requirements. Material test certificates, heat number traceability records and inspection reports can be provided with the supply.
ASTM A182 F316 Forged Fittings contain molybdenum, which improves resistance to chlorides and corrosive process fluids when compared to standard SS 304 grades. These forged fittings are commonly used in chemical processing plants, marine installations, offshore projects, water treatment facilities and industrial process piping systems. F316 forged fittings are often selected for applications where corrosion resistance is a key requirement.
ASTM A182 F316L Forged Fittings contain lower carbon content than F316, helping reduce carbide precipitation during welding. Fabricators and piping contractors often use F316L forged fittings in welded process piping systems for pharmaceutical manufacturing, food processing facilities, chemical plants and stainless steel fabrication projects. The lower carbon content helps maintain corrosion resistance in welded areas and heat-affected zones.
ASTM A182 F316Ti Forged Fittings contain titanium, which helps stabilise the material during prolonged exposure to elevated temperatures. F316Ti forged fittings are commonly used in refinery piping, thermal processing equipment, heat exchangers and industrial systems operating under continuous high-temperature conditions. The titanium-stabilised composition helps maintain material integrity during long-term service at elevated temperatures.
Our range of SS 316, SS 316L and SS 316Ti forged fittings includes forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, adapters and swage nipples for threaded and socket weld piping systems. Each fitting serves a specific function within the piping network, whether it is changing the direction of flow, creating branch connections, connecting different pipe sizes or closing the end of a pipeline.
SS 316, SS 316L and SS 316Ti forged fittings offer good tensile strength, ductility and toughness across a wide range of operating conditions. The forging process produces a dense grain structure that helps withstand pressure and operating stresses in industrial piping systems. These grades also provide good resistance to corrosion, oxidation and temperature fluctuations encountered in process industries.
We manufacture SS 316, SS 316L and SS 316Ti forged fittings in pressure classes 2000#, 3000#, 6000# and 9000# in accordance with ASME B16.11 requirements. Threaded forged fittings are typically supplied in Class 2000#, 3000# and 6000#, while socket weld forged fittings are available in Class 3000#, 6000# and 9000#. The required pressure class is usually determined by the design pressure, operating temperature and service conditions of the piping system.
We manufacture SS 316, SS 316L and SS 316Ti forged fittings in both socket-weld and threaded configurations for process piping systems. Socket-weld forged fittings are often used in permanently welded pipework, while threaded forged fittings are more common in smaller pipe sizes where future inspection, dismantling or replacement may be required. We can supply threaded connections in NPT, BSP and BSPT standards to suit different piping specifications.
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| SS 316 | S31600 | 1.4401 / 1.4436 | Z7CND17-11-02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 | SUS 316 | 316S31 / 316S33 | - |
| SS 316L | S31603 | 1.4404 / 1.4435 | Z3CND17-11-02 / Z3CND18-14-03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 |
| SS 316Ti | S31635 | 1.4571 | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 | SUS 316Ti | 904S13 | - |
ARK Stainless Inc. is a manufacturer, supplier and exporter of SS 317 and SS 317L Forged Fittings in India. We manufacture socket-weld and threaded forged fittings, including elbows, tees, couplings, unions, caps, plugs, bushings, crosses and swage nipples in accordance with ASTM A182 and ASME B16.11 standards.
SS 317 forged fittings contain higher molybdenum content than SS 316 grades, providing improved resistance to pitting and crevice corrosion in chloride-bearing environments. SS 317L forged fittings contain lower carbon content, which helps reduce carbide precipitation during welding and supports corrosion resistance in welded piping systems.
These forged fittings are commonly used in chemical processing plants, fertiliser units, pulp and paper mills, petrochemical facilities, offshore installations and industrial process piping systems handling corrosive fluids. The combination of corrosion resistance and weldability makes SS 317 and SS 317L forged fittings suitable for applications where standard stainless steel grades may not provide adequate performance.
We manufacture SS 317 and SS 317L forged fittings in pressure classes 2000#, 3000#, 6000# and 9000#, with NPT, BSP and BSPT threaded connections available as required. We can supply material test certificates, heat number traceability records and inspection reports according to project specifications.
ASTM A182 F317 Forged Fittings contain higher molybdenum content than standard SS 316 grades, providing improved resistance to pitting and crevice corrosion in chloride-containing environments. These forged fittings are commonly used in chemical processing plants, pulp and paper mills, fertiliser units and industrial piping systems carrying corrosive process fluids. Many process plants use F317 forged fittings in services where SS 316 may not provide sufficient resistance to aggressive chemical media.
ASTM A182 F317L Forged Fittings contain lower carbon content than F317, helping reduce carbide precipitation during welding. The lower carbon content supports corrosion resistance in welded areas, making F317L forged fittings suitable for fabricated process piping systems used in chemical plants, pharmaceutical facilities and industrial processing units. Fabricated piping systems with a high amount of welding frequently use F317L forged fittings because the lower carbon content helps maintain corrosion resistance after welding.
The primary difference between SS 317 and SS 317L forged fittings lies in their carbon content. SS 317 contains a higher carbon level, while SS 317L is a low-carbon version developed for welded piping applications. The lower carbon content in SS 317L helps reduce sensitisation and carbide precipitation during welding, whereas SS 317 may be used where welding requirements are less critical. Both grades offer higher molybdenum content than SS 316 and provide improved resistance to corrosive process environments.
We manufacture SS 317 and SS 317L forged fittings in pressure classes 2000#, 3000#, 6000# and 9000# in accordance with ASME B16.11 requirements. Threaded forged fittings are generally supplied in Class 2000#, 3000# and 6000#, while socket-weld forged fittings are available in Class 3000#, 6000# and 9000#. The required pressure class is determined by the operating pressure, temperature and process requirements of the piping system.
We manufacture SS 317 and SS 317L forged fittings in both socket weld and threaded configurations for industrial piping systems. Socket-weld forged fittings are commonly used in permanently welded pipework, while threaded forged fittings are often preferred for smaller bore piping systems that may require future inspection or maintenance. NPT, BSP and BSPT threaded connections can be supplied to suit different piping standards and project specifications.
| STANDARD | UNS | WNR. | JIS | EN |
|---|---|---|---|---|
| SS 317 | S31700 | 1.4449 | SUS 317 | - |
| SS 317L | S31703 | 1.4438 | SUS 317L | X2CrNiMo18-15-4 |
ARK Stainless Inc. is a manufacturer, supplier and exporter of SS 321 and SS 321H Forged Fittings in India. We manufacture socket-weld and threaded forged fittings for piping systems operating under elevated temperature conditions.
SS 321 and SS 321H are titanium-stabilised austenitic stainless steel grades developed for applications involving prolonged exposure to heat. The titanium addition helps reduce carbide precipitation during welding and improves resistance to intergranular corrosion. These grades also offer good strength, toughness and oxidation resistance at elevated temperatures.
SS 321 and SS 321H forged fittings are commonly used in refinery piping, petrochemical plants, power generation facilities, thermal processing equipment, heat exchangers and industrial process piping systems operating at higher temperatures.
ASTM A182 F321 Forged Fittings are manufactured from titanium-stabilised stainless steel developed for applications involving elevated temperatures and welded piping systems. The titanium addition helps reduce carbide precipitation during welding, allowing the material to maintain corrosion resistance in heat-affected zones. F321 forged fittings are commonly used in refinery piping, petrochemical facilities, heat exchangers, thermal processing equipment and industrial process piping systems.
ASTM A182 F321H Forged Fittings are the higher carbon version of F321 stainless steel. The increased carbon content helps improve strength at elevated temperatures and supports long-term service under continuous heat exposure. F321H forged fittings are commonly installed in power generation facilities, refinery piping, furnace systems, heat treatment equipment and other high-temperature process systems.
The main difference between SS 321 and SS 321H forged fittings is the carbon content. SS 321H contains a higher carbon level, which helps improve strength during long-term exposure to elevated temperatures. SS 321 forged fittings are commonly used in welded piping systems where resistance to intergranular corrosion after welding is important. SS 321H forged fittings are more frequently used in refinery piping, furnace systems, thermal processing equipment and other services operating at elevated temperatures. Both grades contain titanium, which helps stabilise the material during welding and prolonged heat exposure.
We manufacture SS 321 and SS 321H forged fittings in pressure classes 2000#, 3000#, 6000# and 9000# according to ASME B16.11 requirements. Threaded forged fittings are generally supplied in Class 2000#, 3000# and 6000#, while socket-weld forged fittings are available in Class 3000#, 6000# and 9000#. Project specifications and operating conditions determine the pressure class required for the application.
We manufacture SS 321 and SS 321H forged fittings in both socket weld and threaded configurations for process piping applications. Socket-weld forged fittings are commonly used in permanently welded pipework, while threaded forged fittings are often preferred for smaller bore piping systems that may require future maintenance or inspection. NPT, BSP and BSPT threaded connections can be supplied to suit different piping standards and project specifications.
| STANDARD | UNS | WNR. | JIS | EN |
|---|---|---|---|---|
| SS 321 | S32100 | 1.4541 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | S32109 | 1.4878 | SUS 321H | X12CrNiTi18-9 |
ARK Stainless Inc. manufactures and supplies SS 347 and SS 347H forged fittings for high-temperature process piping systems. These grades are often used in refinery units, petrochemical plants, power generation facilities, heat exchangers and thermal processing equipment where prolonged exposure to heat is part of normal operation.
The niobium content in SS 347 and SS 347H helps stabilise the material during welding and reduces the risk of intergranular corrosion. This makes the grades suitable for piping systems that operate at elevated temperatures for extended periods.
SS 347 forged fittings are commonly used in process piping, chemical handling systems and heat transfer equipment. SS 347H forged fittings contain higher carbon content, which helps improve creep strength and stress rupture resistance in long-term high-temperature service.
We manufacture forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses and swage nipples in accordance with ASTM A182 and ASME B16.11 standards.
ASTM A182 F347 Forged Fittings are manufactured from niobium-stabilised stainless steel developed for elevated temperature service. The addition of niobium helps reduce carbide precipitation and supports resistance to intergranular corrosion after welding. F347 forged fittings are commonly used in refinery piping, chemical processing equipment, heat exchangers and process systems exposed to elevated temperatures and corrosive operating conditions.
ASTM A182 F347H Forged Fittings are the higher carbon version of F347 stainless steel. The increased carbon content helps improve creep strength and stress rupture resistance during long-term exposure to elevated temperatures. F347H forged fittings are commonly installed in power generation facilities, furnace systems, thermal processing equipment and high-temperature process piping where operating temperatures remain consistently high.
The main difference between SS 347 and SS 347H lies in the carbon content. SS 347H contains a higher carbon level, which helps improve creep strength and stress rupture resistance during long-term exposure to elevated temperatures. SS 347 is commonly used in welded process piping where resistance to intergranular corrosion is important, whereas SS 347H is more frequently specified for high-temperature equipment, refinery piping and thermal processing systems operating under continuous heat exposure. Both grades are stabilised with niobium, which helps minimise carbide precipitation and maintain corrosion resistance after welding.
SS 347 and SS 347H forged fittings are manufactured in pressure classes 2000#, 3000#, 6000# and 9000# to meet ASME B16.11 requirements. Threaded fittings are commonly supplied in Class 2000#, 3000# and 6000#, while socket weld fittings are available in Class 3000#, 6000# and 9000#. The selected pressure class depends on both the pressure rating and the operating temperature of the process system, particularly in high-temperature service applications.
We supply SS 347 and SS 347H forged fittings in both socket weld and threaded types for refinery piping, chemical processing systems and high-temperature process lines. Socket weld fittings are widely used in permanently welded installations, while threaded fittings provide a practical option for smaller bore piping and instrument connections. NPT, BSP and BSPT thread forms are available to match project specifications.
| STANDARD | UNS | WNR. | JIS | EN |
|---|---|---|---|---|
| SS 347 | S34700 | 1.4550 | SUS 347 | X6CrNiNb18-10 |
| SS 347H | S34709 | 1.4961 | SUS 347H | X6CrNiNb18-12 |
ARK Stainless Inc. is a manufacturer, supplier and exporter of SS 904L Forged Fittings in India. We manufacture socket-weld and threaded forged fittings for process piping systems operating in corrosive chemical environments where conventional stainless steel grades may not provide sufficient corrosion resistance.
SS 904L is a high-alloy austenitic stainless steel containing chromium, nickel, molybdenum and copper. The combination of these alloying elements improves resistance to pitting, crevice corrosion and stress corrosion cracking in chloride-containing environments. The copper content also enhances resistance to sulphuric acid and several other aggressive chemical media.
ASTM A182 F904L Forged Fittings are widely used in piping systems exposed to acidic solutions, chloride-bearing fluids and other aggressive process media. The alloy is frequently selected for chemical processing equipment, acid transfer lines, offshore installations, seawater handling systems and gas scrubbing units where corrosion resistance is a primary consideration.
We manufacture SS 904L forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, adapters and swage nipples to ASTM A182 and ASME B16.11 requirements. Socket weld and threaded fittings are available in pressure classes 2000#, 3000#, 6000# and 9000# for use in high-pressure process piping and corrosive service applications.
ASTM A182 F904L Forged Fittings are manufactured from a high-alloy austenitic stainless steel containing chromium, nickel, molybdenum and copper. The alloy was developed for corrosive process environments where standard stainless steel grades may not provide adequate resistance. The addition of copper improves resistance to sulphuric acid, while molybdenum helps improve resistance to pitting and crevice corrosion in chloride-containing media. F904L forged fittings are commonly used in chemical processing equipment, acid handling systems, offshore installations and seawater service applications.
SS 904L forged fittings are frequently used in systems handling acidic solutions, chloride-bearing fluids and other corrosive process media. Chemical processing plants, fertiliser units, offshore facilities, desalination projects, pulp and paper mills, pharmaceutical plants and gas scrubbing systems often use 904L fittings where corrosion resistance is critical for long-term service.
Our range of SS 904L forged fittings includes forged elbows, tees, couplings, unions, caps, plugs, bushings, crosses, adapters and swage nipples. We manufacture these fittings in threaded and socket weld configurations for piping systems that require changes in flow direction, branch outlets, pipe size reductions or end connections in high-pressure process applications.
| STANDARD | UNS | WNR. | JIS | BS | KS | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SS 904L | N08904 | 1.4539 | SUS 904L | 904S13 | STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
