ASME B16.5 F65 Flange 3 Inch 600# Supplied to Singapore | Haihao Group
Haihao Group has completed the production, non-destructive testing, and export packing for a targeted batch of high-pressure weld neck flanges bound for a offshore energy project in Singapore. Built to handle heavy mechanical loads and elevated pressure requirements, this delivery underscores our precision forging and custom machining capabilities for high-yield line pipe systems.
Order Specifications & Technical Profile
Manufactured in strict adherence to international piping standards, the delivered flanges met the following exact specifications:
Product Type: Weld Neck Flange with Raised Face (WN RF)
Nominal Size: 3″ (DN80)
Pressure Rating & Schedule: Class 600 / STD Wall Thickness
Material Grade: ASTM A694 Grade F65 (High-Yield Carbon Steel)
Design Standard: ASME B16.5
Surface Protection: High-Grade Anti-Rust Oil Coating
Engineering Focus: High-Yield Performance of ASTM A694 F65
ASME B16.5 F65 flange 3 inch Class 600 RF weld neck flange for Singapore pipeline project
In high-pressure tie-ins, standard carbon steel flanges often lack the required yield strength without excessively increasing wall thickness. Utilizing an ASTM A694 F65 weld neck flange provides a minimum yield strength of 65,000 psi (450 MPa). This high strength-to-weight ratio allows designers to match high-grade line pipes (such as API 5L X65) while keeping the piping assembly compact and manageable.
Every ASME B16.5 F65 flange in this shipment underwent controlled normalizing heat treatment to ensure grain refinement and uniform mechanical properties throughout the forged hub.
Flange Facing & Weld Prep Precision
To guarantee a leak-proof seal under Class 600 operating conditions, special attention was given to the flange face finish and hub end prep:
Serrated Raised Face (RF): The raised face was turned to a precise spiral serrated finish (Ra 3.2–6.3 µm / 125–250 µin), optimizing gasket seating stress for high-pressure service.
Match-Bore Weld Prep: The hub bore was machined to match standard (STD) pipe wall thickness, ensuring a smooth internal transition that minimizes flow turbulence and erosion-corrosion at the welded joint.
As a leading raised face flange supplier, Haihao Group ensures every 3 inch 600# WN flange undergoes strict dimensional check and flange facing inspection before entering the coating stage.
Quality Assurance & Shipping Preparation
To prevent marine atmosphere oxidation during ocean freight to Southeast Asia, each ASME B16.5 F65 flange was treated with a transparent anti-rust oil coating. Flange faces were fitted with heavy-duty plastic protective caps, and the batch was secured in steel-strapped wooden cases designed for safe container loading.
Looking for certified high yield strength weld neck flange solutions or customized Class 600 RF flange for Singapore projects? Contact the Haihao Group engineering sales team today for fast-turnaround technical support and competitive factory quotes.