Haihao Group Supplies A182 F304L WN Flange to Russia | ASME B16.5 RF Flange
Haihao Group has recently completed the production and shipment of a batch of WN flange products to a customer in Russia. The order includes 2-inch Class 150 weld neck flanges, manufactured in ASTM A182 F304L stainless steel and produced in full compliance with ASME B16.5 standards.
Product Details of the WN Flange Shipment
The supplied WN flange specifications are as follows:
- Type: Weld Neck Flange (WN flange)
- Size: 2 inch
- Pressure Rating: Class 150 (CL150)
- Schedule: SCH 40S
- Facing: RF (Raised Face)
- Material: ASTM A182 F304L
- Standard: ASME B16.5
Each WN flange is clearly marked according to project requirements, including heat number and traceability codes. The flanges are coated with anti-rust oil and protected with sealing caps to ensure safe transportation and storage.
Advantages of A182 F304L WN Flange
The A182 F304L WN flange is widely used in industrial piping systems due to its excellent corrosion resistance and mechanical performance.
Key benefits include:
- Superior corrosion resistance for chemical and industrial environments
- Low carbon content, reducing the risk of intergranular corrosion
- Excellent weldability, suitable for pipeline construction
- Strong structural integrity, ideal for high-reliability piping systems
Because of these advantages, the WN flange is commonly used in oil & gas, petrochemical, and water treatment projects.
Haihao Group Project Experience in Flange Supply
Haihao Group has extensive experience supplying WN flange and other pipeline components to global engineering projects.
The company has successfully delivered flanges and fittings to regions such as:
- Russia
- Southeast Asia
- Middle East
- South America
In a recent pipeline project, Haihao Group supplied a complete package including WN flange, pipe fittings, and seamless pipes for an industrial facility. All products were manufactured according to international standards and underwent strict inspection before shipment.
This project once again demonstrates Haihao Group’s ability to provide reliable WN flange solutions for global customers.
Why Choose WN Flange for Pipeline Systems?
The WN flange (weld neck flange) is one of the most commonly used flange types in industrial piping systems.
Key features include:
- Long tapered hub for stress distribution
- Strong butt-weld connection with pipes
- Excellent performance under pressure and temperature
- Reduced risk of leakage
Due to these features, the WN flange is widely used in critical pipeline systems where safety and durability are essential.
FAQ – WN Flange
What is a WN flange used for?
A WN flange is used to connect pipes in high-performance piping systems. Its weld neck design provides strong reinforcement and reliable sealing.
What does RF mean in a flange?
RF stands for Raised Face, which improves sealing performance by concentrating pressure on the gasket area.
Why choose A182 F304L for WN flange?
A182 F304L WN flange offers excellent corrosion resistance, good weldability, and long service life, making it suitable for industrial pipelines.
What standard is used for WN flange manufacturing?
Most WN flange products are manufactured according to ASME B16.5, which defines dimensions, pressure ratings, and tolerances.


