Home > Pipe Fittings > Super Duplex Steel Pipe Fittings
Super Duplex Steel Pipe Fittings Manufacturer, Supplier & Stockist
Kalpataru Piping Solution is a reputable producer and distributor of high-performance Super Duplex Steel Pipe Fittings, designed to provide the highest strength, durability and also corrosion resistance in a harsh industrial condition. Super duplex stainless steel is characterised by an equal ratio of austenitic and ferritic phases, which offers almost twice the strength of traditional stainless steels in mechanical strength with excellent resistance to stress corrosion cracking, pitting, and crevice corrosion.
Our Super Duplex fittings are manufactured with a high grade of raw material and using high technology to maintain similar dimensions, the best finish, and high durability. These fittings are enhanced with chromium, molybdenum and nitrogen and are thus perfect in severe conditions that incorporate chlorides, seawater and hot chemical processing environments.
Super Duplex Stainless Steel Pipe Fittings, Super Duplex Pipe Elbows, Seamless Super Duplex Fittings, ASTM A815 Super Duplex Buttweld Fittings, SDSS Buttweld Components, High-Strength Super Duplex Steel Buttweld Fittings, Leading Manufacturer and Supplier of Super Duplex Pipe Fittings in Mumbai, India.
Super Duplex Steel Pipe Fittings are designed with reliability and are commonly used in offshore platforms, oil and gas processing, petrochemical plants, desalination, in the sea and in heat exchanger systems. These fittings facilitate a safe fluid transfer process and structural integrity even in the case of high pressure and corrosive environments.
At Kalpaturu Piping Solution, the processes of quality control are carried out at all levels of production. Every fitting is extensively inspected, tested and certified in accordance with global standards, giving it flawless performance. Our skilled technical staff deals with accuracy in production, adequate handling of material and project-specific solutions.
Coupled with a commitment to quality, prompt delivery and customer satisfaction, we are offering customers reliable duplex piping systems that optimise the performance of operations and minimise the cost of maintenance in the long run in key sectors.
- What is Super Duplex Pipe Fittings?
- Material Grades of Super Duplex pipe fittings
- Super Duplex Pipe Fittings Specifications
- Super Duplex Pipe Fittings Types
- Chemical Composition of Super Duplex Steel Fittings
- Mechanical Properties of Super Duplex Steel Buttweld Fittings
- Physical Properties of Super Duplex Stainless Steel Pipe Fittings
- Equivalent Material Grades of Super Duplex Pipe Fittings
- Super Duplex Pipe Fittings – Dimensional Tolerances
- SDSS Elbow Dimensions (Approximate Values)
- Weight Chart of Super Duplex Stainless Steel Pipe Fittings
- Standards of Super Duplex Stainless Steel Pipe Fittings
- Dimensions Available for Super Duplex Pipe Fittings
- Applications of Super Duplex Pipe Fittings
- Faqs About Super Duplex Pipe Fittings
What is Super Duplex Pipe Fittings?
The Super Duplex pipe fittings (usually UNS S32750/S32760) are high-alloy, corrosion-resistant materials intended to be used in extreme, chloride-rich, and high-pressure conditions, such as offshore oil and gas and chemical processing. These fittings also have excellent strength and are more resistant to pitting and crevice corrosion than those of standard duplex functioning between -50°C and +300°C.
Super Duplex Buttweld Caps, ASME SA815 Pipe Cross Fittings, SDSS 1.4501 Buttweld Components, ANSI B16.9 Super Duplex Steel Tees, Super Duplex Buttweld Reducers, Premium Super Duplex Pipe Fittings, Reliable Supplier of Super Duplex Butt Weld Fittings in India.
Material Grades of Super Duplex pipe fittings
Super Duplex Pipe Fittings Specifications
| Parameter | Details |
|---|---|
| Available Stock Sizes | Seamless Fittings: 1/2″ – 10″ Welded Fittings: 1/2″ – 48″ |
| Wall Thickness (Schedule) | SCH 10 to SCH 160 |
| Applicable Standards | MSS-SP-43, ASME B16.28, ANSI B16.9, ASTM A815, ASME SA815 |
| Surface Finish Options | Polished, Mill Finish, Pickled |
| Manufacturing Methods | Seamless, Fabricated, Welded |
| Bending Radius Options | 1D, 2D, 3D, 5D |
| Key Advantages | High Mechanical Strength, Good Thermal Conductivity, Excellent Weldability |
| Material Origin | Japanese, Indian, Korean, European, American |
| Suitable Media / Fluids | Steam, Water, Air |
| Inspection & Testing | Ultrasonic Testing, HIC Testing, PMI (Positive Material Identification) |
| Bending Techniques Used | Rotary Draw Bending, Ram-Type Bending, Mandrel Bending, Roll Bending |
| Product Forms Available | Elbow, Tee, Cap, Reducer |
| Documentation Provided | 100% Radiography Test Report, Third-Party Inspection Certificate |
| Manufacturing Process | Hot Forming, Mandrel Forming |
| Typical Applications | Marine Systems, Power Generation, Flue Gas Desulfurization Units |
| Packaging Method | Bubble Wrap Protection, Wooden Box Packing, Custom Packaging on Request |
Super Duplex Pipe Fittings Types
Chemical Composition of Super Duplex Steel Fittings
Grade | C (Max) | Mn (Max) | P (Max) | S (Max) | Si (Max) | Cr (%) | Ni (%) | Mo (%) | N (%) | Cu (%) |
S32750 | 0.03 | 1.20 | 0.035 | 0.020 | 0.80 | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 5.0 | 0.24 – 0.32 | 0.50 |
S32760 | 0.03 | 1.00 | 0.030 | 0.010 | 1.00 | 24.0 – 26.0 | 6.0 – 8.0 | 3.0 – 4.0 | 0.20 – 0.30 | 0.50 – 1.00 |
Mechanical Properties of Super Duplex Steel Buttweld Fittings
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| S32750 | 800 | 550 | 15 | 310 |
| S32760 | 750 | 550 | 25 | 300 |
Physical Properties of Super Duplex Stainless Steel Pipe Fittings
| Property | Value |
| Density | 0.28 lb/in³ |
| Modulus of Elasticity | 29 × 10⁶ psi |
| Coefficient of Thermal Expansion (68–212°F) | 7.2 × 10⁻⁶ /°F |
| Thermal Conductivity | 8.7 Btu/h·ft·°F |
| Heat Capacity | 0.12 Btu/lb·°F |
| Electrical Resistivity | 31.5 µΩ·in (×10⁻⁶) |
Equivalent Material Grades of Super Duplex Pipe Fittings
| Material Grade | Standard Specification | Werkstoff No. | Common Designation |
|---|---|---|---|
| SDSS 2507 (S32760) | ASTM A815 UNS S32760 | 1.4410 / F55 | Super Duplex F55 |
| SDSS 2507 (S32750) | ASTM A815 UNS S32750 | 1.4410 / F53 | Super Duplex F53 |
Super Duplex Pipe Fittings – Dimensional Tolerances
| Nominal Pipe Size (NPS) | O.D Tolerance (mm) | Overall Length (F) Tolerance (mm) | Lap O.D (G) Tolerance (mm) | Lap Thickness (T) Tolerance (mm) | Fillet Radius (R) Tolerance (mm) |
|---|---|---|---|---|---|
| 1/2″ to 2½” | ±0.8 | ±1.6 | +0 / −0.76 | +1.52 / −0 | +0 / −0.76 |
| 3″ to 3½” | ±0.8 | ±1.6 | +0 / −0.76 | +1.52 / −0 | +0 / −0.76 |
| 4″ | ±0.8 | ±1.6 | +0 / −0.76 | +1.52 / −0 | +0 / −1.6 |
| 5″ to 8″ | +1.6 / −0.8 | ±1.6 | +0 / −0.76 | +1.52 / −0 | +0 / −1.6 |
| 10″ to 18″ | +2.29 / −0.76 | ±2.0 | +0 / −1.6 | +1.52 / −0 | +0 / −1.6 |
| 20″ to 24″ | +3.05 / −0.76 | ±2.0 | +0 / −1.6 | +1.52 / −0 | +0 / −1.6 |
SDSS Elbow Dimensions (Approximate Values)
| NPS | Center to End – 90° (mm) | Outside Diameter (mm) | Center to End – 45° (mm) |
|---|---|---|---|
| 1/2″ | 38 | 21.3 | 16 |
| 3/4″ | 38 | 26.7 | 19 |
| 1″ | 38 | 33.4 | 22 |
| 1½” | 57 | 48.3 | 29 |
| 2″ | 76 | 60.3 | 35 |
| 6″ | 229 | 168.3 | 95 |
| 8″ | 305 | 219.1 | 127 |
| 10″ | 381 | 273 | 159 |
| 12″ | 457 | 323.8 | 190 |
| 16″ | 610 | 406.4 | 254 |
| 18″ | 686 | 457 | 286 |
| 20″ | 762 | 508 | 318 |
| 22″ | 838 | 559 | 343 |
| 24″ | 914 | 610 | 381 |
| 28″ | 1067 | 711 | 438 |
| 30″ | 1143 | 762 | 470 |
| 32″ | 1219 | 813 | 502 |
| 34″ | 1295 | 864 | 533 |
| 36″ | 1372 | 914 | 565 |
Dimensions are aligned with international standards for accuracy, strength, and smooth flow characteristics.
Weight Chart of Super Duplex Stainless Steel Pipe Fittings
| NPS | Approx. Weight (kg) |
| 1/2″ | 0.16 |
| 3/4″ | 0.20 |
| 1″ | 0.34 |
| 1¼” | 0.59 |
| 1½” | 0.91 |
| 2″ | 1.59 |
| 2½” | 2.72 |
| 3″ | 3.18 |
| 3½” | 4.08 |
| 4″ | 5.44 |
| 5″ | 9.53 |
| 6″ | 15.42 |
| 8″ | 24.95 |
Standards of Super Duplex Stainless Steel Pipe Fittings
Region | Standard | Specification / Description |
Japan (JIS) | JIS B2313 | Buttweld Pipe Fittings |
JIS B2312 | Steel Pipe Fittings for Pressure Service | |
Germany (DIN) | DIN 2618 | Saddle Fittings |
DIN 2615-1/2 | Tee Fittings | |
DIN 28011 | Torispherical Heads | |
DIN 2617 | End Caps | |
DIN 2605-1 | Elbows | |
DIN 2605-2 | Elbows (Heavy Duty) | |
DIN 2616-2 | Concentric Reducers | |
DIN 2616-1 | Eccentric Reducers | |
Europe (EN) | EN 10253-4 | Wrought Stainless Steel Buttweld Fittings |
EN 10253-2 | Non-Alloy and Ferritic Steel Fittings |
Dimensions Available for Super Duplex Pipe Fittings
Nominal Size (Inch) | Wall Thickness (Schedule) |
1″ × 1/2″ | SCH 10S |
4″ × 2″ | SCH 10S |
3″ × 2″ | SCH 40S |
4″ × 2″ | SCH 80S |
2″ × 1″ | SCH 10S |
3″ × 2″ | SCH 10S |
Applications of Super Duplex Pipe Fittings
- .Oil & Gas Industry : Used in offshore platforms, subsea systems, and process piping where exposure to seawater and harsh chemicals is frequent.
- Petrochemical Plants :
Ideal for handling corrosive fluids, acids, and hydrocarbons under high pressure and temperature.
- Desalination Plants : Widely used in seawater intake, brine handling, and reverse osmosis systems due to superior resistance to chloride attack.
- Marine & Shipbuilding : Suitable for seawater piping, ballast systems, and heat exchangers exposed to saline environments.
- Chemical Processing Industry :
Used in reactors, storage tanks, and pipelines where aggressive chemicals are processed.
- Power Generation :
Applied in flue gas desulfurization (FGD) units, cooling water systems, and condenser tubing.
- Pulp & Paper Industry :
Performs reliably in bleaching environments and chemical recovery systems.
- Heat Exchangers & Pressure Vessels :
Preferred for high-strength applications requiring durability and long service life.
- Water Treatment Plants :
Used in high-chloride and contaminated water handling systems.
- Fire Fighting Systems (Offshore/Industrial) :
Ideal for corrosion-resistant piping networks exposed to marine atmospheres.
Faqs About Super Duplex Pipe Fittings
Super Duplex Pipe Fittings are high-performance stainless steel fittings manufactured with a mixed austenitic–ferritic structure, offering a combination of superior mechanical strength and outstanding corrosion resistance.
The most widely used grades include UNS S32750 and UNS S32760, known for their high chromium, molybdenum, and nitrogen content.
They provide nearly twice the strength of conventional austenitic stainless steels along with enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.
Yes, they are specifically designed for seawater and marine applications due to their excellent resistance to salt-induced corrosion and erosion.