ASTM A312 UNS S31254 254SMO Duplex Stainless Steel Offshore Pipe
ASTM A312 UNS S31254 254SMO Duplex Stainless Steel Offshore Pipe
Overview:
S31254 seamless pipe is a high-performance stainless steel alloy designed for critical applications, especially in environments with corrosive elements. This material is characterized by its excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, making it suitable for use in chloride-containing environments.
The alloy composition typically includes high levels of chromium (around 20%) and nickel (around 18%), along with significant additions of molybdenum (around 6%) and nitrogen. This combination not only enhances its corrosion resistance but also contributes to its strength and durability even at elevated temperatures.
In terms of mechanical properties, S31254 exhibits good tensile strength, yield strength, and ductility, allowing it to withstand high pressures and temperatures without compromising performance. Its formability in the seamless pipe manufacturing process ensures a smooth, uniform structure that minimizes weak points.
Industries utilizing S31254 seamless pipes include petrochemical, oil and gas, marine, and energy sectors, where the demand for
Specification:
| Specification | ASTM A312 & Its equivalent ASME, DIN & EN Standard |
| Grades | 254SMO, UNS S31254, DIN 1.4529 |
| Type | Straight seamless/welded pipe |
| Outer Diameter | 1/2'' to 48'' or custom size |
| Wall Thickness | SCH 5S to SCH XXS |
| Length | Upto 6 meters or custom cut lengths |
| Delivery Condition | Solution Annealed & Pickled |
| Ends | Plain End, Beveled End |
| Other Testing | Product Analysis, Eddy Current Test, Hydrostatic Test, Ultrasonic Test, Flattening Test, Hardness Test, Tensile Test etc. |
| Dimension | All Pipe & Tube Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Packing | Plywood case/Woven bag in bundle |
Chemical Composition:
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
| UNS S31254 | 0.02 max | 1.00 max | 0.03 max | 0.01 max | 0.08 max | 19.5-20.5 | 17.5-18.5 | 6.0-6.5 | 0.19-0.25 | 0.5-1.0 |
Mechanical Properties:
| Grade | t |
Tensile Strength min, ksi (MPa) |
Yield Strength min, ksi (MPa) |
Elongation in 2 in. or 50mm, min (%) |
Heat Treating Temperature, min, °F(°C) |
| UNS S31254 |
·t ≤ 0.187in.(5.00mm) ·t＞0.187in.(5.00mm) |
·98(675) ·95(655) |
·45(310) ·45(310) |
35 | 2100(1150) |
1. Chemical processing: S31254 seamless pipes are used in chemical processing plants for handling corrosive chemicals such as sulfuric acid, hydrochloric acid, and phosphoric acid.
2. Oil and gas: S31254 seamless pipes are used in offshore oil and gas platforms, refineries, and pipelines for transporting corrosive fluids such as crude oil, natural gas, and brine.
3. Pulp and paper: S31254 seamless pipes are used in the pulp and paper industry for handling corrosive chemicals such as bleach, chlorine dioxide, and caustic soda.
4. Desalination: S31254 seamless pipes are used in desalination plants for handling seawater and brine.
5. Food and beverage: S31254 seamless pipes are used in the food and beverage industry for handling corrosive fluids such as fruit juices, dairy products, and beer.
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