Premium Stainless Steel 316/316L/316Ti Buttweld Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a leading manufacturer, exporter, and supplier of premium-quality Stainless Steel 316 / 316L / 316Ti Buttweld Pipe Fittings. These fittings are manufactured from molybdenum-bearing austenitic stainless steels using advanced production techniques to ensure excellent mechanical strength, precise dimensional accuracy, and long service life. Our SS 316, 316L, and 316Ti buttweld fittings are extensively used in corrosive and demanding service environments where superior resistance to pitting, crevice corrosion, and chemical attack is essential.
Stainless Steel 316, 316L, and 316Ti grades are well known for their enhanced corrosion resistance, particularly in chloride-rich and acidic environments. The low-carbon 316L grade offers improved weldability and resistance to intergranular corrosion, while 316Ti is stabilized with titanium to maintain strength and corrosion resistance at elevated temperatures. Their buttweld pipe fittings are supplied with precision-beveled ends, enabling full-penetration welding that produces strong, leak-free, and permanent joints.
These fittings ensure a smooth and continuous internal flow path throughout the piping system, minimizing turbulence and pressure loss while improving resistance to corrosion, erosion, and thermal stress. As a result, SS 316 / 316L / 316Ti buttweld pipe fittings are ideal for applications in chemical processing, petrochemicals, pharmaceuticals, marine systems, food processing, and heat exchangers operating under aggressive and high-temperature conditions.
- Stainless Steel 316 90° Elbow
- ASTM A403 SS 316L 45° Elbow
- UNS S31600 / S31603 180° Elbow
- UNS S31635 LR Elbow
- DIN 1.4401 SR Elbow
- ANSI B16.9 SS 316Ti 90° Short Radius Elbow
- 316Ti SS 45° Long Radius Elbow
- SS ASTM A403 WP316 Equal Tee
- ASME B16.9 Stainless Steel 316Ti Pipe Tee
- DIN 1.4401 Butt weld Tee
- ASME SA403 Stainless Steel 316L Reducing Tee
- DIN 1.4401 Unequal Tee
- UNS S31600 / S31603 / S31635 Tees
- A403 WP 316L SS Straight Tee
- B16.9 Stainless Steel 316 Eccentric Reducer Supplier
- ASTM A403 Stainless Steel WP316L Eccentric Reducer
- ASTM A403 WP316Ti SS Eccentric Reducer
- UNS S31600 / S31603 Eccentric Reducers
- DIN 1.4571 Eccentric Reducer
- ANSI B16.9 Stainless Steel 316 Concentric Reducer Supplier
- SS ASME SA 403 WP316L Concentric Reducer
- Stainless Steel 316Ti Concentric Reducer
- UNS S31600 / S31603 Concentric Reducers
- SS DIN 1.4401 / 1.4404 Concentric Reducer
- ASTM A403 WP316 SS Long Stub End Supplier
- ASME B16.9 Stainless Steel 316L Long Stub Ends
- UNS S31600 / S31603 / S31635 Long Stub End
- SS 316Ti Long Stub End
- SS 316 / 316L Lap Joint Stub End
- DIN 1.4401 / 1.4404 Long Stub End
- ASTM A403 SS 316 Short Stub End Supplier
- ASME B16.9 Stainless Steel A403 WP316Ti Short Stub Ends
- ASME SA403 Stainless Steel 316Ti Short Stub End
- SS UNS S31600 Short Stub Ends
- DIN 1.4404 Short Stub End
- ASTM A403 / SA403 Stainless Steel WP316 Pipe Cap Supplier
- ASME B16.9 SS 316L End Pipe Cap
- SS UNS S31600 Pipe End Cap
- UNS S31603 Buttweld Cap
- DIN 1.4571 Cap
- A403 WP316Ti Buttweld Pipe Cap
- UNS S31635 End Cap
- ASTM A403 Stainless Steel 316 Equal Cross
- ASME B16.9 SS 316L Buttweld Cross
- ASTM A403 WP316Ti Cross
- SS UNS S31600 / S31603 Unequal Cross
- SS S31635 Cross
- DIN 1.4401 Reducing Cross
- ASME SA403 SS 316 Pipe Bend Exporter
- B16.9 Stainless Steel 316L Piggable Bend
- UNS S31600 / S31603 / S31635 U Bend
- SS DIN 1.4404 Long Radius Bend
- ASTM A403 Stainless Steel 316Ti Buttweld Bend
CHEMICAL COMPOSITION OF SS 316/316L/316TI SEAMLESS AND WELDED PIPE FITTINGS
| Element | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| 316 (S31600) | 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 (S31603) | 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 (S31635) | 0.08 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 16.0 – 18.0 | 2.00 – 3.00 | 10.0 – 14.0 | 0.1 max |
MECHANICAL PROPERTIES OF ASME SA403 SS WP316 / 316L/ 316TI BUTTWELD PIPE FITTINGS
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 316 | 75 | 30 | 40 | 217 | 95 |
| 316L | 70 | 25 | 40 | 217 | 95 |
| 316Ti | 515 MPa | 205 MPa | 35 | 205 | 75 |
SPECIFICATION OF SS 316/316L/316TI BUTTWELD FITTINGS
| Specifications | ASTM A403 / ASME SA403 |
|---|---|
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | Seamless Butt Weld Fittings: ½” to 10″ | Welded Butt Weld Fittings: ½” to 48″ |
| Schedule | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Type | Seamless / ERW / Welded / Fabricated |
| Thickness | 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc. |
316/316L/316Ti STAINLESS STEEL ASTM A403 BUTTWELD FITTINGS EQUIVALENT GRADES
| 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 | Z6CNDT17-123 | X6CrNiMoTi17-12-2 | SUS 316Ti | 320S31 | 08Ch17N13M2T |
PHYSICAL PROPERTIES OF ASTM A403 STAINLESS STEEL 316/316L/316TI PIPE FITTINGS
| 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) |
|---|---|---|---|---|---|---|
| 0.29 at 68°F | 100.8 at 212°F | 29.1 at 68°F | 29 | 8.9 at 32 – 212°F 9.7 at 32 – 1000°F 11.1 at 32 – 1500°F |
0.108 at 68°F 0.116 at 200°F |
2500 to 2550 |
💡 Practical Difference in Use
Use Stainless Steel 316 / 316L / 316Ti Buttweld Pipe Fittings when: superior corrosion resistance, excellent performance in chloride-rich and acidic environments, and reliable strength at moderate to elevated temperatures are required for critical piping systems. → Example: chemical processing lines, marine piping, pharmaceutical plants, food & beverage systems, and offshore installations.
Applications of SS 316 / 316L / 316Ti Buttweld Pipe Fittings
Stainless Steel 316, 316L, and 316Ti Buttweld Pipe Fittings are designed for enhanced corrosion resistance and long-term durability, making them ideal for aggressive chemical and marine service conditions.
- Chemical & Process Industries: Acid handling lines, reactors, and corrosive fluid transport systems.
- Marine & Offshore: Seawater piping, desalination plants, and offshore platform systems.
- Pharmaceutical & Food Processing: Hygienic piping, clean-in-place (CIP) systems, and sanitary process lines.
When to Choose SS 316 / 316L / 316Ti?
These grades are preferred for applications demanding high resistance to pitting, crevice corrosion, and intergranular corrosion, along with excellent weldability and long-term reliability.
Choose SS 316 / 316L / 316Ti when:
- Exposure to chlorides, acids, or marine environments is expected
- Enhanced resistance to pitting and crevice corrosion is required
- Low-carbon 316L is needed to prevent intergranular corrosion after welding
- Titanium-stabilized 316Ti is required for improved high-temperature stability
- Used in chemical plants, offshore structures, and hygienic piping systems
Industries That Use SS 316 / 316L / 316Ti Buttweld Pipe Fittings
These fittings are widely used across industries where corrosion resistance, cleanliness, and durability are critical to safe and efficient operations.
Engineered for aggressive chemical and corrosive operating environments.
Uses
Acid transfer lines, reactors, and chemical processing piping.
Why SS 316 / 316L / 316Ti?
Molybdenum-enhanced composition provides excellent resistance to corrosion and chemical attack.
Ideal for continuous exposure to seawater and harsh marine conditions.
Uses
Seawater intake lines, desalination units, and offshore piping systems.
Why SS 316 / 316L / 316Ti?
Outstanding resistance to chlorides, pitting, and crevice corrosion ensures long service life.
Used where hygiene, purity, and cleanability are essential.
Uses
Sanitary process lines, CIP systems, and sterile fluid transfer piping.
Why SS 316 / 316L / 316Ti?
Excellent surface finish, weldability, and corrosion resistance meet strict hygienic standards.
Usage guide for SS 316 / 316L / 316Ti Buttweld Pipe Fittings
Smooth directional change in corrosion-resistant piping systems.
Choose Elbow when
- 45°, 90°, or 180° direction change is required
- Chloride, acidic, or marine environments are involved
- Used in chemical, pharmaceutical, or marine pipelines
- High corrosion and pitting resistance is essential
Creates reliable branch connections in corrosive service lines.
Choose Tee when
- Equal or unequal flow branching is required
- Uniform distribution of corrosive fluids is needed
- Used in chemical processing or hygienic systems
- Strong, leak-proof welded joints are critical
Maintains alignment while reducing pipe size in corrosive pipelines.
Choose Eccentric Reducer when
- Avoiding air or vapor pockets is important
- Pump suction or horizontal pipelines are used
- Handling corrosive or chloride-rich fluids
- Flow efficiency must be maintained
Uniform diameter transition for corrosion-resistant piping.
Choose Concentric Reducer when
- Centered alignment is required
- Vertical piping systems are installed
- Smooth flow transition is necessary
- Used in chemical, water treatment, or process lines
Facilitates dismantling using lap joint flanges in corrosive systems.
Choose Long Stub End when
- Frequent inspection or dismantling is required
- Corrosion resistance is critical at flange joints
- Cost-effective flange solutions are preferred
- Used in chemical or marine service lines
Compact lap joint connection for limited-space corrosive applications.
Choose Short Stub End when
- Space constraints exist
- Economical lap joint connections are required
- Used in chemical or hygienic pipelines
- Good corrosion resistance and clean finish are needed
Securely seals the end of corrosion-resistant piping systems.
Choose Pipe Cap when
- Pipe ends must be permanently or temporarily closed
- Used for pressure testing or future expansion
- Leak-proof sealing is essential
- Exposure to corrosive fluids or environments exists
Four-way branching for complex corrosive piping networks.
Choose Cross when
- Flow must be divided into multiple directions
- Used in chemical, marine, or process systems
- High-strength and leak-proof welds are required
- Long-term resistance to corrosion and pitting is needed
Large-radius directional change for smooth corrosive fluid flow.
Choose Pipe Bend when
- Gradual change in direction is required
- Used in chemical plants, marine lines, or offshore systems
- Low turbulence and pressure drop are important
- High corrosion-resistant and durable flow paths are needed
Our Buttweld Pipe Fittings are manufactured using advanced processes and undergo extensive quality checks to ensure flawless weldability, 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 forming and welding stages, every buttweld 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 buttweld 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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