Products Description
Our Advantages
1. Weld Quality
- The Super Duplex Stainless Steel Pipe is manufactured using high-precision argon arc welding. The inner surface is polished, resulting in smooth, clean, and fully penetrated welds.
- Each pipe undergoes ultrasonic and eddy current testing to ensure a defect-free surface and intact welds.
2. High Corrosion Resistance
- Our pipes are made of superior super duplex stainless steel with a PREN value ≥40–50, exhibiting excellent resistance to pitting corrosion and chloride stress corrosion cracking, making them suitable for corrosive substances such as seawater, acidic substances, and brine.
- TORICH pipes undergo chemical composition testing, intergranular corrosion (IGC) testing, and salt spray testing to ensure stable operation in seawater systems, offshore platforms, and chemical processing applications.
3. Dimensions and Surface Quality
- Our pipes undergo pickling, passivation, and bright annealing, resulting in high cleanliness and purity, making them suitable for instrumentation, chemical injection lines, and pharmaceutical applications.
- The Super Duplex Stainless Steel Pipe is manufactured using precision forming and welding techniques to ensure tight dimensional tolerances. Each pipe undergoes rigorous dimensional inspection to ensure compliance with ASTM A789 standards.
4. High Strength
- Our pipes undergo stringent mechanical property testing, exhibiting high strength and pressure resistance, twice that of ordinary austenitic stainless steel.
- Hydrostatic pressure testing ensures that the pipes will not leak even at pressures exceeding operating requirements, making them suitable for high-pressure piping systems.
application areas
- Offshore and Submarine Systems: Chemical injection lines, hydraulic control lines, etc.
- Oil and Gas: High-pressure instrument lines, chemical injection lines, and corrosion-resistant lines, etc.
- Chemical and Petrochemical Processing: Piping for heat exchangers and condensers, as well as for conveying acids, brine, and corrosive chemicals.
- Instrumentation: Small-diameter piping for analyzers, sensors, and control systems.
steel grades
- UNS S32750 (2507): High strength and excellent pitting resistance, suitable for seawater systems, offshore platforms, and desalination.
- UNS S32520: With added copper and tungsten, its corrosion resistance is enhanced, making it ideal for chemical processing and brine systems.
- UNS S39274: Premium super duplex steel with extremely high PREN values and excellent resistance to stress corrosion cracking.
Chemical Composition
| Element | Cr | Ni | Mo | W | N | Mn | Si | C | P | S |
|---|---|---|---|---|---|---|---|---|---|---|
| S32750 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | - | 0.24–0.32 | ≤1.2 | ≤0.8 | ≤0.03 | ≤0.035 | ≤0.02 |
| S32520 | 24.0–27.0 | 4.5–7.0 | 3.0–4.5 | 1.5–2.0 | 0.20–0.30 | ≤2.0 | ≤1.0 | ≤0.03 | ≤0.04 | ≤0.03 |
| S39274 | 24.0–27.0 | 6.5–8.5 | 3.0–4.0 | 0.5–1.0 | 0.24–0.32 | ≤1.2 | ≤0.8 | ≤0.03 | ≤0.035 | ≤0.02 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| S32750 | ≥795 | ≥550 | ≥25 | ≤290 |
| S32520 | ≥760 | ≥550 | ≥25 | ≤300 |
| S39274 | ≥760 | ≥550 | ≥25 | ≤300 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| Duplex 2205 | Lower cost, but also lower corrosion resistance and strength. |
| 254 SMO | Austenitic stainless steel has excellent wear resistance but lower strength. |
| Inconel 625 | It has superior corrosion resistance at high temperatures, but is more expensive. |
Products Show
Testing Equipment
Eddy Current Flaw Detector
Hydraulic Universal Testing Machine
Intergranular Corrosion Tester
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
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