Products Description
Product Specifications
| Standards |
EN 10216-5 |
| Steel Grades | 1.4410 (UNS S32750 / 2507), 1.4501 (UNS S32760),etc |
| Equivalent Standards | ASTM A789 / ASTM A790 / ASME SA789 / ASME SA790 |
| Outer Diameter (OD) |
6 mm - 250 mm |
| Wall Thickness (WT) | 0.5 mm - 30 mm |
| Length | 6/12 m, customized |
| Surface Treatment | Bright Annealed |
| Production Process | Cold Rolled / Cold Drawn |
| Condition | Solution Annealed |
Compared to 316L and 2205 grades, Super Duplex stainless steel pipe offers superior mechanical strength, capable of withstanding hydraulic pressure surges in the 10,000 PSI range, making it ideal for high-pressure hydraulic systems.
With a PREN ≥ 42, Super Duplex stainless steel resists chloride-induced corrosion, seawater exposure, and acidic environments, making it suitable for the harsh, high-temperature, and high-salinity conditions found in deep-sea downhole applications.
The piping undergoes bright annealing to achieve a surface roughness of Ra ≤ 0.8 μm; this reduces hydraulic flow resistance by 15–20% and minimizes impurity accumulation and clogging, ensuring precise and stable hydraulic signal transmission-meeting the rigorous demands of high-precision hydraulic piping in the oil and gas industry.
Customized Services
- TORICH offers customization for non-standard dimensions, with wall thickness tolerances controlled to ±0.05mm and outer diameter tolerances to ±0.1mm. Tubing is supplied in coils, with customizable coil lengths.
- We provide end-finishing services-including plain ends, chamfering, threading, grooving, and weld beveling-along with deburring to prevent hydraulic fluid leakage after assembly.
- In addition to standard BA finishes, we offer surface treatments such as BA combined with internal electropolishing (EP), pickling and passivation, and internal bore honing.
Chemical Composition
| Steel grade | C max |
Si | Mn |
P max |
S max |
N | Cr | Cu | Mo | Ni | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Steel name | number | ||||||||||
| X2CrNiMoN22-5-3 | 1.4462 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.10-0.22 | 21.0-23.0 | – | 2.50-3.5 | 4.5-6.5 |
| X2CrNiMoSi18-5-3 | 1.4424 | 0.030 | 1.40-2.00 | 1.20-2.00 | 0.035 | 0.015 | 0.05-0.10 | 18.0-19.0 | – | 2.50-3.0 | 4.5-5.2 |
| X2CrNiN23-4 | 1.4362 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.05-0.20 | 22.0-24.0 | 0.10-0.60 | 0.10-0.60 | 3.5-5.5 |
| X2CrNiMoN25-7-4 | 1.4410 | 0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 0.20-0.35 | 24.0-26.0 | – | 3.00-4.5 | 6.0-8.0 |
| X2CrNiMoCuN25-6-3 | 1.4507 | 0.030 | ≤0.70 | ≤2.00 | 0.035 | 0.015 | 0.15-0.30 | 24.0-26.0 | 1.00-2.50 | 2.70-4.0 | 5.5-7.5 |
| X2CrNiMoCuWN25-7-4 | 1.4501 | 0.030 | ≤1.00 | ≤1.00 | 0.035 | 0.015 | 0.20-0.30 | 24.0-26.0 | 0.50-1.00 | 3.00-4.0 | 6.0-8.0 |
Mechanical Properties
| Steel Grade | Steel Number | Tensile Strength | Yield Strength Rp0.2 | Elongation | Hardness |
|---|---|---|---|---|---|
| X2CrNiMoN22-5-3 | 1.4462 | 620–880 MPa | ≥450 MPa | ≥25 % | ≤290 HB |
| X2CrNiMoSi18-5-3 | 1.4424 | 600–850 MPa | ≥400 MPa | ≥25 % | ≤290 HB |
| X2CrNiN23-4 | 1.4362 | 600–830 MPa | ≥400 MPa | ≥25 % | ≤290 HB |
| X2CrNiMoN25-7-4 | 1.4410 | 795–950 MPa | ≥550 MPa | ≥25 % | ≤310 HB |
| X2CrNiMoCuN25-6-3 | 1.4507 | 800–950 MPa | ≥550 MPa | ≥25 % | ≤310 HB |
| X2CrNiMoCuWN25-7-4 | 1.4501 | 800–1000 MPa | ≥550 MPa | ≥25 % | ≤310 HB |
Possible Alternative Grades
- For onshore hydraulic pipelines operating at ambient temperatures with low chloride levels, 2205 duplex stainless steel is a cost-effective choice.
- For pipelines used in high-temperature, ultra-deepwater, and saline environments, 6Mo stainless steel (1.4547, UNS S31254) is suitable; with a PREN value of ≥43, it is appropriate for low-pressure, thick-walled components exposed to extremely high chloride levels.
- For onshore, low-pressure auxiliary hydraulic lines subject to mild corrosion, 316L stainless steel is an option; while less expensive than duplex stainless steel, it is unsuitable for the harsh conditions found in offshore and downhole environments.
application areas
EN 10216-5 Super Duplex Stainless Steel Pipe for hydraulic control lines in demanding oil and gas industry environments：
- Subsea hydraulic control systems: Hydraulic valve actuation lines, subsea umbilical hydraulic lines
- Offshore platform hydraulic systems: Safety Instrumented Systems (SIS), hydraulic actuators
- Wellhead control panels: Hydraulic supply lines, control fluid transmission systems
- Chemical injection control lines: Corrosion inhibitor injection lines, flow assurance systems
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: What are the advantages of BA (Bright Annealed) tubing over standard polished steel tubing for hydraulic lines?
A: BA tubing is annealed in a sealed nitrogen atmosphere, resulting in an oxide-free surface with an Ra roughness of ≤ 0.8 μm. This minimizes hydraulic fluid adhesion and prevents pipeline blockages, making it suitable for high-precision hydraulic systems.
Q: Is it suitable for use in acidic service environments (NACE MR0175)?
A: Yes. Our 1.4410 and 1.4501 super duplex stainless steel grades fully comply with NACE MR0175 / ISO 15156 standards, enabling them to withstand H₂S service conditions within the specified hardness and environmental limits.
Q: What inspections are performed before the products leave the factory?
A: Inspections are strictly conducted in accordance with EN 10216-5 (TC2 class) requirements, covering chemical composition analysis, mechanical testing, hydrostatic testing, ultrasonic testing, eddy current testing, and dimensional and visual inspections.
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