1. Q: What material is ASTM A333 Grade 10 steel pipe made of?
A:
It is a low-temperature seamless/welded steel pipe designed for low-temperature environments (down to -60°C).
It is made of carbon steel with a small amount of alloying elements (such as nickel) to enhance its low-temperature toughness.
It complies with the ASTM A333 standard and is suitable for pressure piping systems.
2. Q: What are its main applications?
A:
Oil and gas: liquefied natural gas (LNG) pipelines and cryogenic transmission pipelines.
Chemical equipment: Refrigeration systems and cryogenic storage tanks.
Energy industry: Cryogenic cooling piping in power plants.
3. Q: What is the difference between Grade 10 and other grades (such as Grade 6)?
A:
Temperature range: Grade 10 is suitable for temperatures up to -60°C, while Grade 6 is only suitable for temperatures down to -45°C. Chemical Composition: Grade 10 contains nickel (0.40-1.06%) to enhance low-temperature brittleness resistance.
Mechanical Properties: Grade 10 has more stringent impact toughness requirements.
4. Q: What are its mechanical properties?
A (Typical values):
Tensile strength: ≥415 MPa
Yield strength: ≥240 MPa
Elongation: ≥30% (50mm gauge length)
Impact test: Charpy V-notch impact value must meet low-temperature requirements.
5. Q: What standards must be met for production and inspection?
A:
Manufacturing standard: ASTM A333 (seamless/welded process).
Inspection requirements:
Hydraulic pressure test, nondestructive testing (UT or RT).
Low-temperature impact test (-60°C environmental verification).
