High Quality Duplex Steel Forged Pipe Fittings
S31803/S32205 • Strength • Sealing • Durability
Get a QuotePremium Duplex Steel S31803/S32205 Forged Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, and supplier of Duplex Steel S31803 / S32205 Forged Pipe Fittings. Manufactured from high-performance duplex stainless steel, these forged fittings deliver an exceptional combination of high mechanical strength, superior corrosion resistance, and long service life, making them ideal for demanding and space-restricted industrial environments.
Duplex Stainless Steel S31803 / S32205 is engineered for outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion, while offering nearly twice the strength of conventional austenitic stainless steels. This makes forged fittings in this grade highly suitable for critical applications in chemical processing, oil & gas, petrochemical plants, seawater systems, and pulp & paper industries. Our forged fittings are available in threaded and socket weld configurations, ensuring secure, leak-proof, and vibration-resistant connections under high pressure and corrosive service conditions.
Designed for compact piping layouts, precise alignment, and reliable performance, our duplex steel forged pipe fittings support efficient flow control while maintaining excellent pressure integrity. They are widely used in high-pressure pipelines, instrumentation lines, heat exchangers, hydraulic systems, and industrial process equipment. Choose Ratnadeep Steel & Engg. Co. for premium-quality Duplex Steel S31803 / S32205 forged pipe fittings that meet international standards and deliver dependable performance in aggressive operating environments.
- Duplex Steel S31803 / S32205 Socket Weld & Threaded Elbow
- UNS S31803 / S32205 Forged Elbow
- ASME SA 182 Duplex SAF 2205 45° Elbow
- DIN 1.4462 Duplex Stainless Steel Forged Elbow
- ASTM A182 Duplex Steel S31803 Forged Equal Tee
- ASME SA182 Duplex S32205 Socket Weld Tee
- DIN 1.4462 Duplex Reducing Tee
- UNS S32205 Threaded Unequal Tee
- ASME SA182 Duplex SAF 2205 Socket Weld Cross
- UNS S31803 / S32205 Threaded Equal Cross
- DIN 1.4462 Duplex Forged Cross
- Duplex Steel Reducing & Unequal Cross
- UNS S31803 Duplex Forged Full Coupling
- ASME SA182 Duplex S32205 Socket Weld Coupling
- ASTM A182 SAF 2205 Threaded Full Coupling
- DIN 1.4462 Duplex Steel Coupling
- ASTM A182 SAF 2205 Socket Weld Half Coupling
- UNS S31803 / S32205 Threaded Half Coupling
- ANSI B16.11 Duplex Steel Forged Half Coupling
- UNS S31803 Duplex Forged Pipe End Cap
- ASTM A182 SAF 2205 Socket Weld Pipe Cap
- ASME SA182 Duplex S32205 Forged Cap
- Threaded Duplex Steel Pipe Cap
- UNS S31803 Socket Weld Forged Union
- ASTM A182 SAF 2205 Threaded Union
- ASME SA182 Duplex S31803 / S32205 Union
- ANSI Duplex Steel Forged Union
- UNS S31803 Duplex Threaded Bushing
- ANSI B16.36 Duplex Hex Head Bushing
- ASTM A182 SAF 2205 Forged Bushing
- ASME SA182 Duplex S31803 / S32205 Bushing
- UNS S31803 Threaded & Socket Weld Nipple
- ASTM A182 SAF 2205 Swage & Hex Nipple
- ASME SA182 Duplex S31803 Forged Nipple
- Duplex Steel S32205 Screwed Pipe Nipple
CHEMICAL COMPOSITION OF DUPLEX STEEL FORGED PIPE FITTINGS
| Grade | Common Name | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% |
|---|---|---|---|---|---|---|---|---|---|---|
| 2205 | S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| 2205 | S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
MECHANICAL PROPERTIES OF ASME SA815 DUPLEX STEEL FORGED PIPE FITTINGS
| Tensile Strength, ksi | 0.2% Yield Strength, ksi | Elongation, % | Hardness [HRC] |
|---|---|---|---|
| 90 min | 65 min | 25 min | 293 max |
SPECIFICATION OF DUPLEX STEEL S31803/S32205 FORGED FITTINGS
| Specifications | ASTM A182 / ASME SA182 |
|---|---|
| Dimension Standard | ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97, BS3799 |
| Size | 1/8″ NB to 4″ NB |
| Type | Socketweld Fittings, Screwed-Threaded Fittings (NPT or PT Type) |
| Rating Pressure | Threaded End – 2000 / 3000/ 6000 LBS. Socket-weld End – 3000 / 6000/ 9000 LBS. |
S31803/S32205 DUPLEX STEEL ASTM A815 FORGED FITTINGS EQUIVALENT GRADES
| Common Name | UNS | WNR. |
|---|---|---|
| Duplex Steel 2205 | S31803 / S32205 | 1.4462 |
PHYSICAL PROPERTIES OF DUPLEX STEEL S31803 & S32205 FORGED FITTINGS
| Temperature | Density lbm/in³ | Electrical Resistivity mΩ·in | Thermal Conductivity (BTU/hr·ft·°F) | Heat Capacity BTU/lbm·°F | Electrical Resistivity (in × 10⁻⁶) |
|---|---|---|---|---|---|
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212°F | – | 26.1 | 9.2 | 0.119 | 35.4 |
| at 392°F | – | 25.4 | 9.8 | 0.127 | 37.4 |
| at 572°F | – | 24.9 | 10.4 | 0.134 | 39.4 |
💡 Practical Difference in Use
Use Duplex Steel S31803 / S32205 Forged Pipe Fittings when:
compact size, high mechanical strength, excellent corrosion resistance, and leak-proof performance under high pressure are required.
Forged duplex fittings are ideal for threaded and socket weld connections where space constraints, vibration resistance, and precise alignment are critical.
These grades provide outstanding resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking.
→ Example: high-pressure oil & gas lines, chemical process piping, offshore platforms, instrumentation systems, seawater handling, and compact industrial piping networks.
Applications of Duplex Steel S31803 / S32205 Forged Pipe Fittings
Duplex Steel Forged Pipe Fittings are engineered for high-pressure, corrosive, and space-restricted environments where reliability, strength, and corrosion resistance are essential.
- Chemical & Petrochemical: High-pressure process lines, acid and alkali transfer systems, instrumentation piping, and compact chemical units.
- Oil & Gas & Seawater Systems: Offshore platforms, seawater cooling lines, desalination plants, hydraulic and control systems.
- Power & Industrial Systems: High-pressure utility piping, heat exchangers, and industrial process equipment requiring compact forged connections.
When to Choose Duplex Steel S31803 / S32205?
This duplex stainless steel grade is ideal for forged pipe fittings where high strength, resistance to chloride stress corrosion cracking, and dependable performance under high pressure and corrosive environments are required.
Choose Duplex Steel S31803 / S32205 when:
- Piping systems operate under high pressure with threaded or socket weld connections
- Space constraints require compact and high-strength forged fittings
- Excellent resistance to chlorides, acids, and aggressive chemicals is essential
- Vibration resistance and leak-proof performance are critical
- Used in oil & gas, chemical processing, offshore, desalination, or industrial systems
Industries That Use Duplex Steel S31803 / S32205 Forged Pipe Fittings
Duplex steel forged fittings are widely used in industries that demand compact design, high pressure capability, and long-term corrosion resistance.
Designed for high-pressure chemical processing and corrosion-intensive environments.
Uses
Process piping, instrumentation lines, acid and alkali handling systems, and compact chemical units.
Why Duplex Steel?
Provides superior resistance to pitting, crevice corrosion, and stress corrosion cracking while maintaining high mechanical strength in forged connections.
Trusted for durability and leak-proof performance in offshore, marine, and high-pressure systems.
Uses
Offshore platforms, seawater cooling systems, desalination plants, hydraulic and control piping.
Why Duplex Steel?
Exceptional resistance to chloride-induced stress corrosion cracking ensures long service life in marine and oil & gas environments.
Used where compact size, pressure resistance, and reliability are essential.
Uses
High-pressure utility piping, heat exchangers, and industrial process equipment.
Why Duplex Steel?
Combines high strength with excellent corrosion resistance, making forged fittings ideal for demanding industrial and power applications.
Usage Guide for Duplex Steel S31803 / S32205 Forged Pipe Fittings
Compact directional change fitting for high-pressure, corrosion-resistant forged piping systems.
Choose Socket Weld Elbow when
- 45° or 90° directional change is required in forged piping
- High pressure and vibration resistance is critical
- Leak-proof welded joints are needed in compact layouts
- Used in oil & gas, chemical processing, or offshore systems
Strong branch connection for pressure-critical and corrosion-resistant forged pipelines.
Choose Forged Tee when
- Branch connections are required in high-pressure lines
- Equal or reducing flow distribution is needed
- Superior mechanical strength and corrosion resistance are essential
- Used in chemical plants, offshore platforms, or refineries
Four-way flow distribution in compact, high-strength forged piping networks.
Choose Forged Cross when
- Flow must be split in multiple directions
- Space is limited but high strength is required
- Piping operates under high pressure or corrosive conditions
- Used in chemical, offshore, or seawater applications
Allows easy disassembly of forged piping systems without disturbing alignment.
Choose Forged Union when
- Frequent maintenance or inspection is required
- Quick dismantling of pipelines is needed
- High pressure and corrosion resistance are essential
- Used in instrumentation, process piping, or offshore systems
Reduces pipe or fitting size in high-pressure forged piping layouts.
Choose Forged Bushing when
- Connection between different pipe sizes is required
- Threaded reduction is preferred over welded reducers
- Compact and high-strength reduction is needed
- Used in chemical, oil & gas, or hydraulic systems
Securely seals pipe ends in high-pressure and corrosive forged piping systems.
Choose Forged Pipe Cap when
- Pipe ends must be permanently or temporarily closed
- Pressure testing or future expansion is planned
- Leak-proof sealing under severe conditions is required
- Used in chemical, offshore, or marine environments
Compact threaded or socket weld outlet for small-bore forged piping connections.
Choose Half Coupling when
- Small branch or outlet connections are required
- Space is limited in high-pressure systems
- Instrumentation or drain connections are needed
- Used in process piping or chemical plants
Joins two pipes securely in high-strength forged piping systems.
Choose Full Coupling when
- Two pipes of the same size must be connected
- High-pressure, leak-free joint is required
- Threaded or socket weld connections are preferred
- Used in oil & gas, chemical, or offshore pipelines
Short threaded or welded connector for precise alignment in forged piping systems.
Choose Forged Nipple when
- Short extension or spacing is required between fittings
- Threaded or socket weld connections are needed
- High pressure and corrosion resistance are critical
- Used in chemical processing, oil & gas, or instrumentation lines
Our Forged Pipe Fittings are manufactured using advanced forging processes and undergo extensive quality checks to ensure flawless dimensional accuracy, durability, and long service life. Each fitting is thoroughly inspected using key NDT techniques such as radiographic testing (RT), ultrasonic testing (UT), hydrostatic testing, and visual/dimensional examination. We also perform detailed chemical composition analysis and mechanical property testing to ensure material compliance with strict industry standards.
Throughout the forging and finishing stages, every forged fitting is monitored closely to eliminate defects such as misalignment, surface irregularities, and wall-thickness variations. This ensures perfect joint integrity and high-performance reliability in pipelines carrying high temperatures, pressures, and corrosive media. All our forged fittings fully comply with ASME, ASTM, MSS-SP, and related global specifications, making them a preferred choice for critical piping systems worldwide.
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