Premium Stainless Steel 304/304L/304H Forged Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a leading manufacturer, exporter, and supplier of premium-quality Stainless Steel 304 / 304L / 304H Forged Pipe Fittings. These fittings are manufactured from high-grade austenitic stainless steel using advanced forging and machining techniques to ensure superior mechanical strength, precise dimensional accuracy, and long-term service reliability. Our forged fittings are widely used in industries that require excellent corrosion resistance, heat resistance, and dependable pressure-handling performance.
Stainless Steel 304, 304L, and 304H are among the most widely used grades in the austenitic stainless-steel family. Their forged pipe fittings are designed for high-pressure and high-temperature applications, offering strong, dense grain structures that enhance durability and resistance to mechanical stress. The low-carbon 304L grade provides improved weldability and resistance to intergranular corrosion, while 304H offers higher carbon content for enhanced strength at elevated temperatures.
These forged fittings provide a smooth and uniform internal flow path within piping systems, minimizing turbulence, reducing pressure loss, and improving resistance to corrosion and erosion. As a result, SS 304 / 304L / 304H forged pipe fittings are ideal for use in chemical processing, petrochemical plants, power generation, oil & gas, and general industrial piping systems.
- SS 304 / 304L / 304H Socket Weld & Threaded Elbow
- UNS S30400 / S30403 / S30409 Forged Elbow
- ASME SA182 F304H 45° & 90° Elbow
- DIN 1.4301 Stainless Steel Forged Elbow
- ASTM A182 SS 304 Forged Equal Tee
- ASME SA182 SS 304L / 304H Socket Weld Tee
- DIN 1.4301 / 1.4307 Reducing Tee
- SS 304 / 304L / 304H Threaded Tee
- ASTM A182 F304 Threaded Equal Cross
- ASME SA182 SS 304L Socket Weld Cross
- SS 304H Reducing & Unequal Cross
- DIN 1.4301 Forged Cross
- ASTM A182 SS 304 / 304L / 304H Full Coupling
- Threaded & Socket Weld Forged Coupling
- DIN 1.4301 Stainless Steel Coupling
- ASTM A182 F304H Socket Weld Half Coupling
- ANSI B16.11 SS 304 Threaded Half Coupling
- UNS S30400 / S30403 / S30409 Half Coupling
- ASTM A182 F304 / F304L / F304H Pipe Cap
- Threaded & Socket Weld Forged End Cap
- DIN 1.4301 Stainless Steel Cap
- ASTM A182 F304L Threaded Union
- ASME SA182 SS 304H Forged Union
- ANSI B16.11 Stainless Steel Union
- B16.36 Stainless Steel Hex Head Bushing
- ASTM A182 F304L Threaded Bushing
- ASME SA182 SS 304H Forged Bushing
- ASTM A182 F304L Threaded & Socket Weld Nipple
- ASME SA182 SS 304H Hex & Swage Nipple
- SS 304 / 304L / 304H Screwed Pipe Nipple
CHEMICAL COMPOSITION OF SS 304/304L/304H FORGED PIPE FITTINGS
| C | Mn | Si | P | S | Cr | 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: 0.04 max: 0.10 |
2.0 max | 0.75 max | 0.045 max | 0.03 max | min: 18.0 max: 20.0 |
min: 8.0 max: 10.5 |
0.10 max |
MECHANICAL PROPERTIES OF ASME SA403 SS WP304 / 304L/ 304H FORGED PIPE FITTINGS
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 304 | 75 | 30 | 40 | 201 | 92 |
| 304L | 70 | 25 | 40 | 201 | 92 |
| 304H | 75 | 30 | 40 | 201 | 92 |
SPECIFICATION OF STAINLESS STEEL 304/304L/304H 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. |
304/304L/304H STAINLESS STEEL ASTM A403 FORGED FITTINGS EQUIVALENT GRADES
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| SS 304 | S30400 | 1.4301 | Z7CN18-09 | X5CrNi18-10 | SUS 304 | 304S31 | 08X18H10 |
| SS 304L | S30403 | 1.4306/1.4307 | Z3CN18-10 | X2CrNi18-9/X2CrNi19-11 | SUS 304L | 304S11 | 03X18H11 |
| SS 304H | S30409 | 1.4301 | – | – | – | – | – |
PHYSICAL PROPERTIES OF ASTM A403 STAINLESS STEEL 304/304L/304H PIPE FITTINGS
SS 304/304L
| Density lbm/in³ | Thermal Conductivity (BTU/h ft. °F) | Electrical Resistivity (in x 10⁶) | Modulus of Elasticity (psi x 10⁶) | Coefficient of Thermal Expansion (in/in)/ °F x 10⁶ | Specific Heat (BTU/lb/ °F) | Melting Range (°F) |
|---|---|---|---|---|---|---|
| at 68°F: 0.285 | 9.4 at 212°F 12.4 at 932°F |
28.3 at 68°F 39.4 at 752°F 49.6 at 1652°F |
28 | 9.4 at 32 – 212°F 10.2 at 32 – 1000°F 10.4 at 32 – 1500°F |
0.1200 at 68°F to 212°F | 2500 to 2590 |
SS 304H
| Density lbm/in³ | Coefficient of Thermal Expansion (min/in)-°F | Thermal Conductivity BTU/hr-ft.-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)-²-psi |
|---|---|---|---|---|
| at 68 °F: 0.285 | at 68 – 212°F: 9.2 at 68 – 1600°F: 11.0 |
at 212°F: 9.4 at 932°F: 12.4 |
at 32 – 212°F: 0.12 | in tension (E): 29 x 10⁶ |
💡 Practical Difference in Use
Use Stainless Steel 304 / 304L / 304H Forged Pipe Fittings when: excellent corrosion resistance, high pressure-handling capability, strong threaded or socket connections, and long-term reliability are required in industrial piping systems. → Example: chemical processing lines, food & beverage plants, heat exchangers, pressure pipelines, and water treatment facilities.
Applications of SS 304 / 304L / 304H Forged Pipe Fittings
Stainless Steel 304, 304L, and 304H Forged Pipe Fittings provide high mechanical strength, compact design, and superior corrosion resistance, making them suitable for high-pressure and moderate-to-high temperature service.
- Chemical & Petrochemical: High-pressure process piping, instrumentation lines, and reactor connections.
- Food & Beverage: Hygienic piping systems for liquid, steam, and cleaning applications.
- Power & Utilities: Boiler feed lines, heat exchanger connections, and utility piping.
When to Choose SS 304 / 304L / 304H?
These grades are selected for applications requiring excellent corrosion resistance, good weldability, high pressure strength, and dependable performance under moderate and elevated temperatures.
Choose SS 304 / 304L / 304H when:
- Corrosion resistance in general industrial environments is essential
- Compact forged fittings are preferred for high-pressure systems
- Reliable threaded or socket-weld connections are required
- Elevated temperature strength is needed (304H)
- Used in pipelines, heat exchangers, and processing plants
Industries That Use SS 304 / 304L / 304H Forged Pipe Fittings
These forged fittings are widely used in industries that demand corrosion resistance, pressure integrity, and long service life.
Used in corrosive and pressurized process systems.
Uses
Instrumentation piping, chemical transfer lines, and reactor connections.
Why SS 304 / 304L / 304H?
Excellent corrosion resistance, mechanical strength, and weldability.
Ideal for hygienic and sanitary piping systems.
Uses
Steam lines, dairy processing lines, and cleaning systems.
Why SS 304 / 304L / 304H?
Non-reactive surface, corrosion resistance, and easy cleaning.
Suitable for pressure-bearing utility pipelines.
Uses
Boiler feed water lines and heat exchanger connections.
Why SS 304 / 304L / 304H?
Reliable performance under pressure and temperature variations.
Usage Guide for SS 304 / 304L / 304H Forged Pipe Fittings
Directional flow change with high joint strength.
Choose Socket Weld Elbow when
- 90° or 45° direction change is required
- High-pressure piping systems are used
- Leak-proof welded joints are critical
- Compact and durable connections are needed
Creates equal or reduced branch connections.
Choose Tee when
- Flow needs to be split into branch lines
- Equal or reduced outlet sizes are required
- Threaded or socket connections are used
- Compact piping layouts are preferred
Four-way threaded flow distribution fitting.
Choose Cross when
- Flow needs to be divided in four directions
- Compact piping layouts are required
- Used in instrumentation and utility lines
- Strong threaded connections are essential
Joins two pipes of the same size with threaded ends.
Choose Full Coupling when
- Pipe extension is required
- Inline threaded connections are needed
- High mechanical strength is important
- Leak-tight joints are essential
Single-ended threaded connection welded or fixed to equipment.
Choose Half Coupling when
- Branch connections are required on vessels
- Instrumentation ports are needed
- High-pressure service conditions exist
- Strong, compact connections are required
Closes the end of a threaded pipeline securely.
Choose Cap when
- Pipe ends need to be sealed
- Used for isolation or pressure testing
- Leak-proof termination is required
- Corrosive environments are involved
Allows easy disconnection of pipeline sections.
Choose Union when
- Frequent dismantling is required
- Maintenance access is important
- Leak-tight threaded joints are needed
- Used in low to medium pressure systems
Reduces pipe size within a threaded connection.
Choose Bushing when
- Pipe size reduction is required
- Space-efficient transitions are needed
- Threaded piping systems are used
- Corrosion resistance is critical
Short threaded connection between two fittings or pipes.
Choose Nipple when
- Joining two female-threaded components
- Space-saving compact connections are needed
- High-pressure threaded systems are used
- Corrosion-resistant threaded joints are required
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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