High Pressure Seamless SS Pipe 304L 3mm Wall EN 10312 Stainless Steel Pipes
Seamless SS High Pressure Pipe 304L 3mm Wall, EN 10312, Cryogenic, LNG Transport
Seamless Stainless Steel Pipes 304L (3mm Wall Thickness) by Jiangsu China Steel Union Industrial Co., Ltd are engineered for high-pressure cryogenic applications, including liquefied natural gas (LNG) transport, aerospace fuel systems, and ultra-low-temperature storage. Compliant with EN 10312, these seamless pipes combine exceptional toughness at temperatures as low as **-196°C** with superior resistance to thermal stress and embrittlement. The 304L grade, with controlled carbon content (≤0.03%) and stabilized austenitic structure, prevents carbide precipitation during welding, ensuring leak-proof integrity in LNG tankers, cryogenic valves, and vacuum-insulated pipelines. The 3mm wall thickness optimizes strength-to-weight ratios for high-pressure (up to 150 bar) and low-temperature environments.
2. Detailed Specifications
| Parameter | Details |
|---|---|
| Material | 304L Stainless Steel (UNS S30403 / EN 10312) |
| Element Composition | Cr: 18–20%, Ni: 8–12%, C: ≤0.03%, Mn: ≤2%, Si: ≤1%, P: ≤0.045%, S: ≤0.03%, Fe: Balance |
| Dimensions | OD: 10–300mm (±0.5mm), Wall Thickness: 3mm (±0.1mm), Length: 6–12m (Custom Coiled Available) |
| Certifications | EN 10312, ASME B36.19, ISO 21028 (Cryogenic Toughness), PED 2014/68/EU, TÜV SÜD |
| Mechanical Properties | Tensile Strength: ≥485 MPa Yield Strength: ≥170 MPa Elongation: ≥40% Charpy Impact (-196°C): ≥80 J |
| Pressure Rating | 150 bar at -196°C (Hydrostatic Tested) |
| Surface Finish | Annealed & Pickled, Electropolished (Ra ≤0.4µm), or Bright Annealed (BA) |
| Applications | LNG tanker pipelines, cryogenic storage tanks, liquid helium transfer lines, vacuum-jacketed systems |
3. Advantages of Importing Our Product
- Cryogenic Expertise: Precision cold-drawn manufacturing ensures uniform grain structure for thermal shock resistance.
- Cost Efficiency: 25% lower pricing than European suppliers, leveraging Jiangsu’s integrated production from raw material to finished pipe.
- Fast Delivery: 12,000-ton annual capacity; 10-day lead time for EN 10312-certified orders from Shanghai or Rotterdam hubs.
- Zero-Defect Guarantee: 100% ultrasonic testing (UT), PMI verification, and full material traceability (EN 10204 3.1).
- Custom Solutions: Vacuum-insulated pipe (VIP) assemblies, orbital welding, and cryogenic flange connections.
4. Key Applications
- LNG Transport: High-pressure transfer lines for LNG carriers and bunkering systems.
- Energy Infrastructure: Cryogenic piping for liquid nitrogen, oxygen, and argon storage/transport.
- Aerospace: Fuel lines for liquid hydrogen rockets and satellite cooling systems.
- Pharmaceutical Cold Chains: Ultra-low-temperature (-150°C) biorepository piping for vaccines and biologics.
Jiangsu China Steel Union Industrial Co., Ltd delivers EN 10312-certified 304L stainless steel pipes that redefine safety and efficiency in cryogenic engineering, offering unmatched performance for global energy, aerospace, and healthcare industries.
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.