Haihao Group Supplied ASTM A182 F51 Long Weld Neck Flange for Indonesia Project with ASME B16.5 Compliance
Haihao Group recently completed the production and delivery of a long weld neck flange for an industrial project in Indonesia. The supplied flange was manufactured according to ASME B16.5 requirements and made from ASTM A182 Grade F51 duplex stainless steel, providing excellent strength, corrosion resistance, and reliable performance under demanding operating conditions.
The order included a 2-inch RF long weld neck flange with Class 600 pressure rating and XXS wall thickness. This type of flange is commonly selected for applications requiring a longer welding neck design, improved connection stability, and enhanced stress distribution.
Project Details of ASTM A182 F51 Long Weld Neck Flange
The Indonesia customer required a high-pressure flange solution with specific dimensions and material performance. Haihao Group manufactured the flange based on international standards and customer specifications.
The product details are listed below:
| Product | Size | Thickness | Pressure Rating | Material | Standard |
| Long Weld Neck Flange, RF | 2″ | XXS (11.50 mm) | 600# | ASTM A182 Gr. F51 | ASME B16.5 |
Manufacturing Features of Duplex Stainless Steel Long Weld Neck Flange
A long weld neck flange provides a longer hub compared with conventional flange designs. The extended neck improves the transition between the pipe and flange, helping reduce stress concentration during operation.
The supplied ASTM A182 F51 long weld neck flange offers several advantages:
- High mechanical strength:Duplex stainless steel F51 combines high tensile strength with good toughness.
- Excellent corrosion resistance:Suitable for environments exposed to chloride and corrosive media.
- Stable welding performance:The long neck design provides better welding transition and connection reliability.
- High-pressure capability:The Class 600 rating supports demanding industrial applications.
During manufacturing, Haihao Group performs strict quality control, including material verification, dimensional inspection, surface examination, and final product checking to ensure compliance with project requirements.
ASTM A182 F51 long weld neck flange RF Class 600 manufactured by Haihao Group
Application of ASME B16.5 Long Weld Neck Flanges
The supplied flange is designed for industrial piping systems where safe and durable connections are required. Typical applications include:
- Oil and gas processing facilities
- Chemical and petrochemical plants
- Offshore and marine systems
- Power generation projects
- Corrosive fluid transportation pipelines
The combination of ASTM A182 F51 material and ASME B16.5 dimensional requirements makes this flange suitable for projects requiring both strength and corrosion resistance.
Why Choose Haihao Group for Long Weld Neck Flanges?
Haihao Group has extensive experience manufacturing flanges, pipe fittings, and pipeline components according to international standards. We provide customized solutions based on customer requirements, including special materials, pressure classes, dimensions, and inspection requirements.
For customers searching for an ASTM A182 F51 long weld neck flange, Haihao Group can provide:
- Flanges in carbon steel, stainless steel, and duplex stainless steel materials
- Manufacturing according to ASME, ASTM, EN, DIN, and other standards
- Complete quality documentation
- Export packaging and global delivery support
The successful shipment to Indonesia reflects Haihao Group’s capability to supply reliable flange products for international industrial projects.
Contact Haihao Group for your next flange and piping project.