ASME B16.5 A350 LF2 Flange
ASME B16.5 A350 Flange refers to a flange manufactured from ASTM A350 material in compliance with the ASME B16.5 standard, specifically designed for low-temperature applications requiring high toughness and impact resistance.
High Quality ASME B16.5 A350 LF2 Flange
- Size Range: NPS ½” to 24″ (aligned with ASME B16.5).
- Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500.
- Temperature Range: -46°C to 343°C (varies by material grade and heat treatment).
ASME B16.5 ASME B16.5 A350 LF2 Flange
The ASME B16.5 standard covers various flange designs, including:
- Weld Neck Flange: Preferred for high-pressure systems, connected via welding.
- Slip-On Flange: Easy installation, suitable for low-pressure applications.
- Blind Flange: Used to seal pipe ends.
- Threaded Flange: Connected via threads, eliminating the need for welding.
- Lap Joint Flange: Paired with stub ends for easy disassembly.
Material Properties:
- LF2 (typical grade): ≤ 0.30% carbon, ≤ 1.35% manganese, with nickel (≤ 0.40%) to enhance low-temperature toughness.
- Mechanical Performance: Tensile strength ≥ 485 MPa, yield strength ≥ 250 MPa, Charpy impact value ≥ 20 J @ -46°C.
Typical Applications
- Liquefied Natural Gas (LNG): LNG terminals, cryogenic transfer pipelines.
- Petrochemical Industry: Equipment handling ethylene, liquid nitrogen, and other cryogenic media.
- Polar Engineering: Oil and gas pipelines in Arctic/Antarctic regions.
- Air Separation Units: Connections for liquid oxygen/nitrogen storage tanks.
Selection Considerations
- Certification: Ensure material has ASTM A350 LF2 certification and Charpy impact test reports.
- Welding Process: Use low-hydrogen electrodes to avoid weld embrittlement.
- Alternative Materials: For extreme low temperatures (e.g., -196°C), consider stainless steel (A182 F304L) or nickel alloys (Inconel).
One-Stop ASME B16.5 A350 LF2 Flange Provider for All Your Needs
SSM has significant product advantages in manufacturing ASME B16.5 A350 LF2 Flange. Whether it’s quality or price, we will meet your needs.
More Information about ASME B16.5 A350 LF2 Flange
ASTM A350 LF2 Material Properties
| Property | Specification |
| Chemical Composition | |
| – Carbon (C) | 0.20% max |
| – Manganese (Mn) | 0.60% – 0.90% |
| – Phosphorus (P) | 0.035% max |
| – Sulfur (S) | 0.035% max |
| – Silicon (Si) | 0.15% – 0.40% |
| – Additional Elements | Minor amounts of Chromium (Cr) and Molybdenum (Mo) allowed |
| Mechanical Properties | |
| – Yield Strength | Minimum 42 ksi (290 MPa) |
| – Ultimate Tensile Strength | Minimum 60 ksi (415 MPa) |
| – Elongation | Minimum 20% (in 8 inches sample) |
| – Impact Toughness | Minimum 27 ft-lb (37 J) @ -50°F (-46°C) |
| Physical Properties | |
| – Density | Approximately 7.85 g/cm³ (0.284 lb/in³) |
| – Hardness | Typically 130 – 170 HB (Brinell hardness) |
| Temperature Range | |
| – Service Temperature | Designed for use down to -50°F (-46°C), and sometimes lower |
| Heat Treatment | |
| – Normalizing | Generally performed to achieve desired mechanical properties |
| – Quenching and Tempering | May be used to further enhance mechanical properties and toughness |
| Testing and Quality Assurance | |
| – Testing | Includes chemical analysis, mechanical testing (tensile and impact tests) |
| – Certification | Products are usually supplied with a test certificate confirming compliance with ASTM A350 LF2 standards |
Pressure–Temperature Ratings for A350 LF2
Differences from A105 Flanges
| Feature | A350 (LF2) Flange | A105 Flange |
| Temperature Range | -46°C to 343°C | -29°C to 425°C |
| Low-Temperature Toughness | Mandatory Charpy impact testing | No low-temperature testing (ambient use) |
| Material Composition | Contains nickel (enhanced cryogenic performance) | Plain carbon steel (no nickel requirement) |
| Typical Applications | LNG systems, Arctic pipelines, cryogenic tanks | Oil, chemical, general industrial piping |
FAQ
Yes in ambient conditions, but at higher cost. A350 is mandatory for low-temperature applications.
Yes, use cryogenic bolts (e.g., ASTM A320 L7) to match flange toughness.
Check impact test data in the Material Test Certificate (MTC) to confirm compliance with ASTM A350.
More Resources:
For specific ASME B16.5 A350 flange dimension tables or supplier recommendations, please provide application details (e.g., media, temperature, pressure)!
Related Products
Hastelloy C276 Bolts Supplier
Reliability in the Most Severe Environments Long Service Life and Low Maintenance Costs Stable Performance in Weld‑Affected Zones Hastelloy C276
Hastelloy C22 Bolts Supplier
Reliability in the Most Severe Environments Long Service Life and Low Maintenance Costs Stable Performance in Weld‑Affected Zones Hastelloy C22
Nickel 201 Bolts Supplier
Reliability in High-Temperature Environments Long Service Life in Harsh Corrosive Environments High Purity and Cleanliness Good Sealing and Electrical Conductivity
EN 
DE 
RU 
FA 
ID 
ES 
FR 
NL