GNEE GROUP

ASTM A333 and ASTM A335 are both standards set by the American Society for Testing and Materials (ASTM), but they cover different types of steel pipes intended for different applications. Here are the key differences between ASTM A333 and ASTM A335:

Purpose:

ASTM A333: This standard covers seamless and welded steel pipes specifically designed for low-temperature service. These pipes are used in applications where low-temperature impact toughness is critical, such as cryogenic applications and low-temperature process systems.
ASTM A335: In contrast, ASTM A335 covers seamless ferritic alloy-steel pipe for high-temperature service. These pipes are designed for applications where high-temperature resistance is required, such as power plants, boilers, and high-temperature industrial processes.

Alloying Elements:

ASTM A333: The ASTM A333 steel used in A333 pipes typically contains low levels of alloying elements, such as carbon, manganese, phosphorus, sulfur, and trace amounts of nickel and chromium. These elements are adjusted to achieve the desired low-temperature properties.
ASTM A335: A335 pipes, on the other hand, are made from alloy steels that contain higher levels of alloying elements, such as chromium, molybdenum, and sometimes vanadium. These alloying elements provide enhanced high-temperature strength and corrosion resistance.

Temperature Range:

ASTM A333: A333 pipes are suitable for temperatures as low as -50°F (-45°C) and lower. They are designed to maintain their toughness and ductility even in extremely cold environments.
ASTM A335: A335 pipes are designed to withstand high-temperature service, typically in the range of 600°F (315°C) to 1200°F (650°C) and higher, depending on the specific grade.

Applications:

ASTM A333: ASTM A333 pipes are commonly used in industries where low-temperature environments are encountered, such as liquefied natural gas (LNG) plants, petrochemical facilities, and refrigeration systems.
ASTM A335: A335 pipes are employed in industries with high-temperature processes, including power generation, chemical processing, and oil refining.

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