Haihao Group Supplied ASTM SA694 F65 Long Weld Neck Flanges for Indonesia Project
Haihao Group has recently completed the production and delivery of ASTM SA694 F65 flange products for an Indonesian customer, providing high-pressure piping components designed for demanding industrial applications. The order included 2-inch long weld neck flanges with different wall thicknesses and neck heights, manufactured according to ASME B16.5 requirements.
Long weld neck flanges are widely used in high-pressure piping systems because of their extended hub design, which provides a smooth stress transition between the flange and pipe. For this project, Haihao Group supplied ASTM SA694 F65 flange with 900# pressure class and raised face (RF) sealing surfaces to ensure reliable connection performance under severe operating conditions.
ASTM SA694 F65 long weld neck flange 900# RF manufactured by Haihao Group
Order Details of Long Weld Neck Flanges
The supplied products included two specifications as shown below:
| Product | Size | Wall Thickness | Neck Height | Pressure Class | Material | Standard |
| Long Weld Neck Flange RF | 2″ | XXS | 6″ | 900# | ASTM SA694 F65 | ASME B16.5 |
| Long Weld Neck Flange RF | 2″ | SCH160 | 4-1/2″ | 900# | ASTM SA694 F65 | ASME B16.5 |
Reliable Material Selection for High Pressure Applications
ASTM SA694 F65 is a high-strength carbon steel forging material commonly selected for pressure piping systems that require excellent mechanical properties and durability. The material is suitable for applications where higher yield strength and dependable performance are required.
For this Indonesian project, each ASTM SA694 F65 flange was manufactured with strict control of dimensions, pressure rating, and surface quality. The RF facing design helps achieve effective sealing with compatible gaskets, while the long neck structure improves load distribution during operation.
Manufacturing and Quality Control at Haihao Group
As an experienced manufacturer of industrial pipeline products, Haihao Group applies strict inspection procedures throughout flange production. From raw material verification and forging control to dimensional inspection and final marking, every step is completed according to customer specifications.
The ASTM SA694 F65 flange supplied for this order was produced following ASME B16.5 dimensional requirements, ensuring compatibility with international piping systems. Inspection records and material certificates can be provided according to project requirements.
Customized Flange Solutions for Global Customers
Different industries require different flange designs, pressure ratings, and material grades. Haihao Group provides customized flange solutions including long weld neck flanges, weld neck flanges, blind flanges, socket weld flanges, and other forged components.
With experience serving customers from Indonesia and other international markets, Haihao Group continues to support energy, petrochemical, and industrial pipeline projects with reliable manufacturing capabilities and professional service.
If you are looking for ASTM SA694 F65 flange solutions for high-pressure piping systems, please contact Haihao Group for technical support and quotation.