Premium Stainless Steel 317/317L Forged Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a leading manufacturer, exporter, and supplier of premium-quality Stainless Steel 317 / 317L Forged Pipe Fittings. These fittings are manufactured from high-molybdenum austenitic stainless steels using advanced forging and machining techniques to deliver excellent mechanical strength, precise dimensional accuracy, and long-term service reliability. Our SS 317 and 317L forged fittings are widely used in highly corrosive and chemically aggressive environments where superior resistance to pitting and crevice corrosion is essential.
Stainless Steel 317 and 317L grades contain higher molybdenum content compared to SS 316, providing enhanced resistance to chlorides, acids, and harsh chemical media. The low-carbon 317L grade offers improved weldability and excellent resistance to intergranular corrosion after welding. These forged pipe fittings are available in socket weld and threaded forms, ensuring strong, leak-tight, and durable connections suitable for severe service conditions.
SS 317 / 317L forged pipe fittings offer compact design, high pressure-handling capability, and excellent resistance to corrosion, erosion, and thermal stresses. As a result, they are ideal for applications in chemical processing plants, petrochemical units, pulp and paper industries, pharmaceutical manufacturing, marine environments, and other systems handling aggressive corrosive fluids under elevated pressure and temperature conditions.
- SS 317/317L Socket Weld Elbow
- UNS S31700 / S31703 Threaded Forged Elbow
- DIN 1.4438 Stainless Steel Forged Elbow
- ASME SA 182 SS F317L 45° & 90° Elbow
- ASME SA182 SS 317L Socket Weld Tee
- ASTM A182 SS 317 Forged Equal Tee
- DIN 1.4449 Reducing Tee
- UNS S31703 Unequal & Threaded Tee
- ASTM A182 F317 Threaded Equal Cross
- UNS S31700 / DIN 1.4449 Forged Cross
- ASME SA182 SS 317L Socket Weld Cross
- SS 317 Threaded, Reducing & Unequal Cross
- DIN 1.4449 Threaded Full Coupling
- UNS S31700 Forged Full Coupling
- ASME SA182 SS 317L Socket Weld Full Coupling
- ASTM A182 SS 317 Full Coupling
- ASTM A182 F317 SS Socket Weld Half Coupling
- UNS S31700 / S31703 Half Coupling
- ANSI B16.11 SS 317 Threaded Half Coupling
- UNS S31700 Forged Pipe End Cap
- ASTM A182 F317 SS Socket Weld Pipe Cap
- ASME SA182 SS 317L Forged Pipe End Cap
- SS 317 Threaded Pipe Cap
- UNS S31700 Socket Weld Union
- ANSI B16.5 SS 317 Union
- ASTM A182 F317 Threaded Union
- ASME SA182 SS 317/317L Forged Union
- UNS S31700 Threaded Bushing
- ANSI B16.36 SS 317 Hex Head Bushing
- ASTM A182 F317 Stainless Steel Threaded Bushing
- ASME SA182 SS 317/317L Forged Bushing
- UNS S31700 Threaded & Socket Weld Nipple
- ASTM A182 F317 Swage & Pipe Nipple
- ASME SA182 SS 317 Hex Nipple
- SS 317/317L Screwed Pipe Nipple
CHEMICAL COMPOSITION OF STAINLESS STEEL 317/317L FORGED PIPE FITTINGS
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| 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 | – |
MECHANICAL PROPERTIES OF ASME SA403 SS WP317 / 317L FORGED PIPE FITTINGS
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1454 °C (2650 °F) |
| Tensile Strength | Psi – 75000, MPa – 515 |
| Yield Strength (0.2% Offset) | Psi – 30000, MPa – 205 |
| Elongation | 35 % |
SPECIFICATION OF STAINLESS STEEL 317/317L 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. |
317/317L STAINLESS STEEL ASTM A403 FORGED FITTINGS EQUIVALENT GRADES
| STANDARD | UNS | WNR. | EN | JIS |
|---|---|---|---|---|
| SS 317 | S31700 | 1.4449 | – | SUS 317 |
| SS 317L | S31703 | 1.4438 | X2CrNiMo18-15-4 | SUS 317L |
PHYSICAL PROPERTIES OF ASTM A403 STAINLESS STEEL 317/317L PIPE FITTINGS
| Property | Value | Unit |
|---|---|---|
| Specific Heat (0-100°C) | 500 | J·kg⁻¹·°K⁻¹ |
| Thermal Conductivity | 14.6 | W·m⁻¹·°K⁻¹ |
| Thermal Expansion | 16.5 | mm/m/°C |
| Modulus Elasticity | 193 | GPa |
| Electrical Resistivity | 7.4 | μΩ·cm |
| Density | 7.99 | g/cm³ |
💡 Practical Difference in Use
Use Stainless Steel 317 / 317L Forged Pipe Fittings when: exceptionally high resistance to pitting, crevice corrosion, and chemical attack is required in compact, high-pressure piping systems operating in severely corrosive environments with high chloride concentration and aggressive acidic media. → Example: chemical processing plants, pulp & paper mills, petrochemical units, pollution control equipment, and corrosive process piping.
Applications of SS 317 / 317L Forged Pipe Fittings
Stainless Steel 317 and 317L Forged Pipe Fittings are manufactured with higher molybdenum content to deliver superior corrosion resistance, strength, and long-term reliability in aggressive chemical service conditions.
- Chemical & Process Industries: Acid handling lines, reactors, valves, and compact chemical piping systems.
- Pulp & Paper Industry: Bleaching plants, digesters, and chemical recovery piping.
- Petrochemical & Refining: High-pressure corrosive process fluid lines.
When to Choose SS 317 / 317L?
These grades are selected for forged piping systems that require corrosion resistance beyond SS 316, especially in aggressive chemical and high-chloride environments.
Choose SS 317 / 317L when:
- Service conditions are too aggressive for SS 316 / 316L
- Higher molybdenum content is required for superior pitting resistance
- Low-carbon 317L is needed to avoid intergranular corrosion after welding
- Compact forged fittings are required for high-pressure service
- Long-term corrosion resistance and reliability are critical
Usage Guide for SS 317 / 317L Forged Pipe Fittings
Directional flow change with strong welded joints.
Choose Socket Weld Elbow when
- 45° or 90° direction change is required
- High-pressure or corrosive service is involved
- Leak-proof socket weld joints are critical
- Compact and durable connections are needed
Creates branch connections in corrosion-resistant piping systems.
Choose Tee when
- Flow must be split into branch lines
- Equal or reduced outlet sizes are required
- Threaded or socket-weld connections are used
- Used in chemical, marine, or hygienic systems
Four-way flow distribution in corrosive service piping.
Choose Cross when
- Flow must be split in multiple directions
- Compact threaded piping layouts are used
- Used in chemical or marine applications
- Strong, corrosion-resistant threaded joints are required
Joins two pipes of the same size in corrosive environments.
Choose Full Coupling when
- Pipe extension or repair is required
- Inline threaded connections are used
- High mechanical strength is needed
- Corrosion-resistant, leak-tight joints are essential
Single-end connection welded to equipment or piping.
Choose Half Coupling when
- Branch or instrument connections are required
- Used in chemical, pharma, or marine systems
- Strong and compact welded joints are needed
- Excellent corrosion resistance is critical
Seals the end of corrosion-resistant threaded pipelines.
Choose Cap when
- Pipe ends must be closed or isolated
- Used for pressure testing or future expansion
- Leak-proof termination is required
- Exposure to corrosive fluids or environments exists
Allows easy disconnection in high corrosion-resistant piping systems.
Choose Union when
- Frequent maintenance or dismantling is required
- Leak-tight threaded joints are important
- Used in chemical, pharma, or marine services
- Corrosion resistance at joints is critical
Threaded size reduction in corrosive piping systems.
Choose Bushing when
- Pipe size reduction is required
- Space-saving threaded transitions are needed
- Used in chemical or marine pipelines
- Resistance to corrosion and crevice attack is essential
Short threaded connection for high corrosion-resistant piping systems.
Choose Nipple when
- Joining two female-threaded components
- Compact pipe extensions are required
- Used in chemical, marine, or process lines
- High resistance to pitting and corrosion is essential
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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