ASTM A350 LF2 CL1 Welding Neck Flanges Shipped to Kazakhstan – ASME B16.5 Class 150 RF
Haihao Group recently completed the production and shipment of ASTM A350 LF2 CL1 welding neck flanges to a valued customer in Kazakhstan. These flanges were manufactured in accordance with ASME B16.5 and designed for low-temperature and sour service applications.
The order included multiple sizes of Class 150 raised face (RF) welding neck flanges, fully certified and inspected before dispatch.
Project Overview
Product: Welding Neck Flange (WN RF)
Standard: ASME B16.5
Material: ASTM A350 LF2 Class 1
Pressure Rating: Class 150
Facing Type: Raised Face (RF)
Service: Sour service (NACE MR0175 compliant)
Certification: EN 10204 Type 3.1
Supplied Items
- 2″ WN RF, Class 150, STD hub – Quantity: 13 pcs
- 4″ WN RF, Class 150, SCH40 hub – Quantity: 6 pcs
All flanges were produced from low temperature carbon steel ASTM A350 LF2 CL1, ensuring excellent notch toughness and mechanical stability in sub-zero operating environments.
ASTM A350 LF2 CL1 welding neck flange Class 150 RF ASME B16.5 shipment to Kazakhstan
Why ASTM A350 LF2 CL1 for Low Temperature Applications?
ASTM A350 LF2 Class 1 is widely used in piping systems where impact resistance at low temperatures is critical. Compared with standard carbon steel grades, LF2 offers:
- Improved toughness at low temperatures
- Reliable performance in cold climates
- Compatibility with sour service conditions
- Strong weldability and structural integrity
For projects in regions such as Central Asia, including Kazakhstan, selecting the correct low temperature carbon steel welding neck flange is essential to ensure operational safety.
Compliance with ASME B16.5 and NACE Requirements
All flanges were manufactured strictly according to ASME B16.5 Class 150 specifications, including:
- Raised face finish: 125–250 µin Ra
- Dimensional accuracy
- Hub thickness per STD and SCH40 requirements
- Pressure designation CL 150
Additionally, these flanges meet NACE MR0175 (MR 01-75) requirements, making them suitable for sour service environments commonly found in oil and gas projects.
Each flange was supplied with EN 10204 Type 3.1 certification, providing full material traceability and mechanical test documentation.
Quality Control and Inspection
At Haihao Group, every ASTM A350 LF2 welding neck flange undergoes:
- Raw material verification
- Chemical composition analysis
- Mechanical testing
- Dimensional inspection
- Surface roughness check
- Marking and traceability control
Before shipment, final inspection ensures compliance with international standards and customer specifications.
Application Areas
These ASME B16.5 Class 150 RF flanges are commonly used in:
- Oil & gas pipelines
- Refinery units
- Petrochemical plants
- Low temperature piping systems
- Sour service installations
The combination of ASTM A350 LF2 CL1 material and welding neck design provides enhanced stress distribution and reduced leakage risk in high-integrity piping systems.
Reliable Flange Manufacturer for International Projects
Haihao Group continues to supply ASME B16.5 welding neck flanges, carbon steel flanges, stainless steel flanges, and special material flanges to global energy and industrial projects.
If you are sourcing ASTM A350 LF2 CL1 Class 150 welding neck flanges for low temperature or sour service applications, our team is ready to support your project with certified products and reliable delivery.
Contact Haihao Group for technical support and quotations.