Home > Super Duplex Steel > Super Duplex Steel Tube Fittings
Curtis Tube Fittings, located in Manila, Philippines, stands out as a leading manufacturer and supplier of top-notch Super Duplex Steel Tube Fittings. Known for their precision engineering and remarkable durability, Curtis Tube Fittings provides components that can handle the tough demands of industries that require excellent corrosion resistance and mechanical strength. Their Super Duplex Steel tube fittings meet international standards, ensuring safe and dependable connections in critical piping systems. With a strong commitment to quality, timely delivery, and customer satisfaction, Curtis Tube Fittings has become a trusted partner for sectors like oil and gas, chemical, marine, and industrial applications where long-lasting performance and reliability are crucial.
Super Duplex Steel Tube Fittings are crafted from a well-balanced blend of austenite and ferrite phases, featuring high levels of chromium, nickel, and molybdenum, along with trace amounts of nitrogen. This unique composition offers exceptional resistance to pitting, crevice, and stress corrosion cracking, while also maintaining impressive tensile strength (around 830–860 MPa), yield strength (approximately 550–600 MPa), and excellent toughness and ductility. The duplex microstructure guarantees durability even in extreme temperatures and harsh chemical environments, making these fittings perfect for demanding industrial applications that require both strength and corrosion resistance.
| Specifications | ASTM A276 ASME SA 479 |
| Size | 6mm to 38mm to 1/4″ to 1 1/2″ |
| Thread | NPT, BSP, BSPT, UNF, ISO, SAE etc. |
| Standards | ASTM B16 ASTM B 453 |
|
OD |
OD Actual |
Thread Designation – Nominal Size |
Thread per inch |
|
|
(fraction inch) |
(inches) |
(inches) |
NPT |
BSP |
|
5/16 |
0.3125 |
1/16 |
27 |
28 |
|
13/32 |
0.405 |
1/8 |
27 |
28 |
|
35/64 |
0.540 |
1/4 |
18 |
19 |
|
43/64 |
0.675 |
3/8 |
18 |
19 |
|
27/32 |
0.840 |
1/2 |
14 |
14 |
|
1-3/64 |
1.050 |
3/4 |
14 |
14 |
|
1-5/16 |
1.315 |
1 |
11-1/2 |
11 |
|
1-21/32 |
1.660 |
1-1/4 |
11-1/2 |
11 |
|
1-29/32 |
1.900 |
1-1/2 |
11-1/2 |
11 |
|
2-3/8 |
2.375 |
2 |
8 |
11 |
|
2-7/8 |
2.875 |
2-1/2 |
8 |
11 |
|
3-1/2 |
3.5 |
3 |
8 |
11 |
|
4 |
4.0 |
3-1/2 |
8 |
11 |
|
4-1/2 |
4.5 |
4 |
8 |
11 |
|
5-5/8 |
5.563 |
5 |
8 |
11 |
|
6-5/8 |
6.625 |
6 |
8 |
11 |
Contact us to get a quick quote for your requirement.
These Super Duplex Steel Tube Fittings find extensive use in oil and gas platforms, chemical and petrochemical plants, desalination facilities, and marine applications where pipelines transport corrosive substances like seawater, acids, and chlorides. They’re also utilized in heat exchangers, pressure vessels, and high-pressure piping systems. Their outstanding performance in challenging conditions ensures long-term reliability, lower maintenance needs, and improved operational safety, making them an ideal choice for critical industrial and marine infrastructure projects.
Super Duplex Steel Tube Fittings find extensive applications in industries demanding high strength and superior corrosion resistance. They are best suited for offshore oil and gas platforms, chemical processing plants, marine, and desalination plants as they are resistant to tough conditions and can work under high pressures. These fittings find application in power generation and pulp and paper plants also, with exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking for sure and long performance in critical applications.
Please feel free to contact us if you need any further information or for enquiry.
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