Stainless Steel Seamless Pipes 6mm, ASTM A358, Cryogenic, LNG
Storage Tanks
Stainless Steel Seamless Pipes (6mm OD) are precision-manufactured for cryogenic applications, including
liquefied natural gas (LNG) storage, aerospace fuel systems, and
ultra-low-temperature processing. Compliant with ASTM A358, these pipes excel in environments as cold as **-196°C** due to
their superior impact resistance, ductility, and resistance to
thermal contraction. The seamless design eliminates weak points,
ensuring leak-proof performance under extreme pressure (up to 220
bar). Grade 304/316L variants are optimized with controlled carbon
content (≤0.03% for 316L) and stabilized austenitic structure to
prevent carbide precipitation and brittleness. Electropolished
surfaces and argon-purged welding further enhance purity for LNG
containment and oxygen-sensitive industrial processes.
2. Detailed Specifications
| Parameter | Details |
|---|
| Material | 304/316L Stainless Steel (ASTM A358 TP304/TP316L) |
| Element Composition | 304: Cr: 18–20%, Ni: 8–10.5%, C: ≤0.08%, Mn: ≤2%, Si: ≤1%
316L: Cr: 16–18%, Ni: 10–14%, Mo: 2–3%, C: ≤0.03% |
| Dimensions | OD: 6mm (±0.1mm), Wall Thickness: 0.5–1.5mm (Customizable), Length:
1–6m (Fixed/Coiled) |
| Certifications | ASTM A358, ASME B36.19, ISO 21028 (Cryogenic Toughness), PED
2014/68/EU, NORSOK M-650 |
| Mechanical Properties | Tensile Strength: ≥515 MPa (304), ≥485 MPa (316L)
Yield Strength: ≥205 MPa (304), ≥170 MPa (316L)
Elongation: ≥40%
Charpy Impact (-196°C): ≥100 J |
| Pressure Rating | 220 bar at -196°C (Hydrostatic Tested) |
| Surface Finish | Electropolished (Ra ≤0.4µm), Annealed, Pickled, or Bright Annealed
(BA) |
| Applications | LNG storage inner/outer tanks, liquid nitrogen transport lines,
cryogenic valves, helium cooling |
3. Advantages of Importing Our Product
- Cryogenic Expertise: Seamless cold-drawn manufacturing ensures uniform grain structure
for thermal shock resistance.
- Leak-Free Guarantee: 100% eddy current testing and helium mass spectrometry for
defect-free performance.
- Custom Solutions: Thin-wall to thick-wall designs, orbital welding, and
vacuum-insulated pipe (VIP) configurations.
- Rapid Global Supply: Pre-certified stock in Dubai, Houston, and Rotterdam; 12-day lead
time for cryogenic-grade orders.
- Full Traceability: Mill test reports (MTRs), cryogenic impact test data, and
compliance with LNG industry codes (BS 7777).
4. Key Applications
- LNG Infrastructure: Inner containment piping, vaporizers, and submerged combustion
vaporization (SCV) systems.
- Aerospace: Liquid hydrogen/oxygen transfer lines for rocket propulsion and
satellite cooling systems.
- Pharma Cryogenics: Ultra-cold storage for mRNA vaccines, biologics, and cell
therapies (-80°C to -150°C).
- Industrial Gas Plants: Piping for argon, nitrogen, and CO2 liquefaction and
distribution.
Engineered to withstand the most demanding cryogenic challenges,
ASTM A358-certified stainless steel seamless pipes deliver
unmatched safety, precision, and longevity for industries where
ultra-low temperatures define operational success.
4. Key Applications
- Offshore Oil & Gas: High-pressure flowlines, risers, and umbilicals in sour (H₂S)
reservoirs and deepwater fields.
- Subsea Systems: Corrosion-resistant piping for seawater cooling, chemical
injection, and hydraulic control lines.
- Petrochemical Plants: Handling acidic crude, chlorinated solvents, and high-temperature
process fluids.
- Desalination Units: Brine recirculation pipelines resistant to saltwater pitting and
crevice corrosion.
Designed to endure the harshest operational demands, EN
10216-5-certified Duplex 2205 steel pipes deliver unparalleled
safety, longevity, and cost efficiency in offshore energy, marine
engineering, and heavy industrial sectors.JIANGSU CHINA STEEL UNION
INDUSTRIAL CO.,LTD
Q1. What are your company's main products ?
A1: Our main products are stainless steel, carbon steel, galvanized steel, aluminium steel,
ppgi steel products, including sheets, pipes, coils, strips, bars
and channels.
Q2. What are the advantages of your company ?
A2: We guarantee that the quantity and specification of products are in
full compliance with the standards of customer orders. We support
any kinds of test. In addition, We also have more professional service and competitive price.
Q3. How do you control quality ?
A3: We provide Factory Test Report, also support Third Party
Inspection.
Q4. How many coutries you already exported ?
A4: Exported to more than 50 countries mainly from Middle East,
Russia, United States, Canada, Italy, Germany, Australia, Egypt,
Chile, Mexico, Venezuela, Argentina, Kuwait, Saudi Arabia, UAE, Sri
Lanka, Indonesia, Bangladesh, Turkey, India, etc.
Q5. Can you provide sample ? Do you support OEM ?
A5: Yes. Small samples in store can be provided for free.
Customized samples will take about 2-3days.
Q6: What's your payment terms ?
A6: By T/T, L/C (30% deposit in advance, balance 70% before
shipment), Western Union, Paypal, or Trade Online.
