The ASTM A350 LF2 ball valve is an American standard low-temperature forged steel ball valve with a forged steel body that controls fluid flow by rotating the ball. It maintains excellent mechanical and sealing performance in extremely low-temperature environments, ensuring reliable operation in cryogenic systems.
Key Features:
Low-Temperature Adaptability
Made from specially treated forged steel, it maintains mechanical and sealing performance in ultra-low temperatures (-196°C to -150°C or other specified ranges).
High Strength & Hardness
The valve body and internal components are forged from materials like stainless steel (304, 316), ensuring sufficient strength, hardness, and corrosion resistance.
Excellent Sealing Performance
Typically uses PEEK or other low-temperature-resistant sealing materials, offering superior pressure and cryogenic resistance for reliable sealing.
Extended Stem Design
Features an extended stem to prevent freezing of the stem packing in low temperatures, ensuring smooth operation.
This valve is ideal for cryogenic applications in industries such as oil & gas, LNG, and chemical processing, where safety and durability are critical.
Order specification
BODY: Low Temperature Carbon Steel ASTM A350 LF2.
Ball and Stem: Stainless Steel SS 316.
Seat: RPTFE.
Class Rating: 300#.
Connection Ends: Flanged Ends RF.
Type: Reduced Bore.
Size: 12 Inch x 10 Inch.
Operator: Gear Box operator with SOLDO Position Indicator, Limit Switch Box.
A350 LF2 Ball Valve Test Pressure
| Test Type | Test Fluid | Test Pressure (bar) | |||||
| Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 | ||
| Shell Test | Water | 29.4 | 77.7 | 153.2 | 229.8 | 383.0 | 638.3 |
| High Pressure Seat Test | Water | 21.6 | 56.3 | 112.3 | 168.5 | 280.9 | 468.1 |
| Low Pressure Seat Test | Air | 6 | 6 | 6 | 6 | 6 | 6 |
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What is ASTM A350 grade LF2 material?
ASTM A350 LF2 is a low-temperature forged steel material under American standards, falling under the category of carbon and low-alloy steel forgings. It is primarily used for connections in low-temperature piping systems, pressure vessels, and equipment.
Material Characteristics
Low-Temperature Performance: Suitable for environments ranging from -46°C to -101°C, with LF2 typically used for -46°C and LF3 for more extreme low temperatures (-101°C).
Applications: Used in low-temperature piping systems across industries such as oil & gas, petrochemical, shipbuilding, and aerospace.
What is the difference between ASTM A350 LF2 and A105?
A105 is a U.S. standard carbon steel forging, adhering to ASTM A105/A105M-2010 (Carbon Steel Forgings for Piping Components). As this standard covers only one type of carbon steel forging, A105 is effectively a single grade of forged carbon steel.
LF2 is a U.S. standard low-temperature steel forging, complying with ASTM A350/A350M-2018. It belongs to the category of carbon and low-alloy steel forgings for piping components requiring notch toughness testing.
Key Notes:
A105 is a general-purpose carbon steel forging for standard-temperature applications.
LF2 is a low-temperature variant (with LF3 for even lower temperatures) designed to maintain toughness in cryogenic environments.
Both are widely used in piping systems, but LF2 is specifically chosen for low-temperature service (e.g., LNG, refrigeration).