A333 Grade 6 Carbon Steel Pipe description
ASME SA333GR.6 seamless steel pipe is a type of American standard seamless steel pipe for cryogenic pipelines, used for cryogenic pressure vessel pipelines and cryogenic heat exchanger pipelines. The main requirement is that the finished steel pipe possesses good impact toughness in cryogenic environments (typically below -45°C) to ensure that it does not experience cryogenic brittle fracture during use.
A333 Grade 6 Carbon Steel Pipe specification
Chemical composition
| Grade | C | Si | Mn | P | S |
| Grade 6 | ≤0.30 | ≥0.10 | 0.29~1.06 | ≤0.025 | ≤0.025 |
Mechanical Property
| Grade | Tensile Strength (MPa) | Yield Point (MPa) | Elongation (%) | ||
| Y | X | ||||
| Grade 6 | ≥415 | ≥240 | ≥30 | ≥16.5 | |
A333 Gr 6 seamless pipe Equivalent Grades
| Former | New | |||
|---|---|---|---|---|
| Execution | Standard | Material | Standard | Material |
| Seamless | ASTM A333 | GRADE 6 | EN 10216-4 | P265NL |
A333 GR.6 steel pipe (i.e., SA-333 Gr.6) is a carbon steel pipe material specifically designed for cryogenic environments, widely used in scenarios requiring extremely low temperatures while maintaining stable performance. Its core application areas and characteristics are as follows:
1. Cryogenic Energy Transmission
Liquefied Natural Gas (LNG) Industry: Used for LNG transmission pipelines, storage tanks, and terminal facilities, with service temperatures down to -196°C (liquid nitrogen temperature) (actual standard test temperatures are typically -50°F/-45°C, but the material itself has the potential for even lower temperatures).
Cryogenic Liquid Transmission: Pipeline systems for industrial gases such as liquid nitrogen, liquid oxygen, and liquid helium.
2. Polar and Cold Region Engineering
Arctic/Antarctic Exploration: Oil and gas extraction and oil/gas pipelines need to operate long-term in extremely cold environments; the cryogenic toughness of A333 GR.6 prevents brittle fracture.
3. Chemical and Refrigeration Industries:
Cold-climate building heating/cooling systems: such as district heating/cooling networks in Northern Europe and Canada.
4. Chemical and Refrigeration Industries:
Cryogenic chemical processes: Some chemical reactions require cryogenic temperatures (e.g., ethylene cracking units), and this material ensures pipeline safety.
Industrial Refrigeration Systems: Ammonia or Freon refrigeration pipelines in large cold storage facilities and food processing plants.
5. Shipbuilding and Marine Engineering:
LNG carriers: Cargo holds and pipelines must withstand the extremely low temperatures of liquefied natural gas.
Offshore Platform Cryogenic Systems: Such as connecting pipelines for cryogenic separation equipment in subsea oil and gas fields.
Test and inspection
Packaging and shipping
