Super Duplex 2507 High Pressure Pipe 4"X12ft, NACE MR0175,
H2S-Resistant, Subsea
Super Duplex 2507 Stainless Steel Pipes (4"x12ft) by Jiangsu China Steel Union Industrial Co., Ltd are engineered for subsea oil and gas applications requiring
exceptional resistance to hydrogen sulfide (H₂S), chloride-induced
stress corrosion cracking (SCC), and high-pressure erosion.
Compliant with NACE MR0175/ISO 15156, these pipes combine the strength of duplex stainless steel with a
PREN (Pitting Resistance Equivalent Number) ≥42, ensuring
unparalleled performance in sour (H₂S-rich) and high-salinity
environments. The 4" diameter (114.3mm OD) and 12ft (3.66m) length
optimize subsea flowline and manifold systems, while seamless
construction and 25Cr-7Ni-4Mo-0.3N chemistry resist pitting,
crevice corrosion, and fatigue in deepwater operations.
2. Detailed Specifications
| Parameter | Details |
|---|
| Material | Super Duplex 2507 (UNS S32750 / EN 1.4410) |
| Element Composition | Cr: 24–26%, Ni: 6–8%, Mo: 3–4.5%, N: 0.24–0.35%, Mn: ≤1.2%, C:
≤0.03%, Si: ≤0.8%, Fe: Balance |
| Dimensions | OD: 4" (114.3mm), Wall Thickness: 6–15mm (Customizable), Length:
12ft (3.66m ±0.1m) |
| Certifications | NACE MR0175/ISO 15156, DNV-OS-F101, ASTM A928, PED 2014/68/EU, API
5LC |
| Mechanical Properties | Tensile Strength: ≥800 MPa
Yield Strength: ≥550 MPa
Elongation: ≥25%
Hardness: 32–35 HRC |
| Pressure Rating | 15,000 psi at 4°C (Hydrostatic Tested) |
| Temperature Range | -50°C to 300°C (Continuous Service) |
| Surface Finish | Pickled & Passivated (ASTM A967), 3LPE Coated, or CRA Clad for
Subsea Corrosion Protection |
| Applications | Subsea flowlines, umbilicals, Christmas trees, and seawater
injection systems |
3. Advantages of Importing Our Product
- H₂S & Chloride Resistance: PREN ≥42 ensures compliance with NACE MR0175 for sour service and
high-salinity subsea environments.
- Cost Efficiency: 25% lower pricing than European mills, leveraging Jiangsu’s
integrated VOD (Vacuum Oxygen Decarburization) refining and
precision forming.
- Rapid Delivery: 18,000-ton annual capacity; 14-day lead time for DNV-certified
orders from Qingdao or Aberdeen hubs.
- Full Traceability: EN 10204 3.2 mill certificates, PMI testing, and DNV-GL/NORSOK
M650 compliance for offshore projects.
- Custom Solutions: Anti-galling threading, clad welding (Alloy 625), and
subsea-ready connectors (Vetco Gray, Cameron).
4. Key Applications
- Subsea Oil & Gas: High-pressure flowlines, risers, and manifold piping in sour gas
fields.
- Seawater Injection: Corrosion-resistant pipes for reservoir pressure maintenance in
offshore platforms.
- Hydraulic Control Systems: Subsea umbilicals and chemical injection lines in H₂S
environments.
- Topside Processing: Sour gas separators, scrubbers, and compressor discharge lines.
- Arctic Drilling: Low-temperature tolerant pipelines for ice-class rigs and LNG
export terminals.
Jiangsu China Steel Union Industrial Co., Ltd delivers NACE MR0175-certified Super Duplex 2507 pipes that
redefine reliability in subsea and sour service applications,
offering unmatched safety, longevity, and cost efficiency for
global energy operators.
FAQ
Q1. Where is your factory ?
A1: Our company's processing center is located in Wuxi, Jiangsu,
China.
Which is well equipped with kinds of machines, such as laser
cutting machine,mirror polishing machine and so on.We can provide a
wide range of personalized services according to the customers'
needs.
Q2. What are your company's main products ?
A2: Our main products are stainless steel plate/sheet, coil,
round/square pipe, bar, channel, etc.
Q3. How do you control quality ?
A3: Mill Test Certification is supplied with shipment, Third Party
Inspection is available.
Q4. What are the advantages of your company ?
A4: We have many professionals, technical personnel, more
competitive prices and best after-dales service than other
stainless steel companies.
Q5. How many coutries you already exported ?
A5: Exported to more than 50 countries mainly from America, , UK,
Kuwait, Egypt, , Turkey, Jordan,
India, etc.
Q6. Can you provide sample ?
A6: Small samples in store and can provide the samples for free.
Customized samples will take about 5-7days.
