30 Inch ASTM A105N ASME B16.47 Series A Weld Neck Flange Shipment to Dubai | Haihao Group
Haihao Group recently completed the production and shipment of a batch of 30 inch ASTM A105N ASME B16.47 Series A weld neck flanges for an industrial customer in Dubai. The project required large-diameter forged flanges manufactured under strict chemical composition control and fully compliant with NACE MR0103 requirements for sour service environments.
The supplied products were produced as WN RF flanges with a pressure rating of Class 150 and a wall thickness of 9.53 mm. These flanges are widely used in oil & gas pipelines, petrochemical plants, offshore projects, and industrial processing systems where reliable sealing performance and corrosion resistance are essential.
As the Middle East energy sector continues to invest in high-performance pipeline systems, demand for ASTM A105N ASME B16.47 Series A flanges remains strong due to their durability, strength, and compatibility with large-diameter piping systems.
Product Overview
| Product | Size | Pressure Class | Material | Standard |
| Weld Neck Raised Face Flange | 30″ | Class 150 | ASTM A105N | ASME B16.47 Series A |
Key Technical Requirements
The customer required the flange material to meet strict chemical element limitations for improved weldability, toughness, and resistance to sulfide stress cracking.
Controlled Chemical Composition Requirements
| Element | Requirement |
| Carbon (C) | Max 0.23% |
| Carbon Equivalent (CE) | Max 0.43% |
| Sulfur (S) | Max 0.008% |
| Vanadium (V) | Max 0.01% |
| Titanium (Ti) | Max 0.01% |
| Nickel (Ni) | Max 0.01% |
| Boron (B) | Max 0.0005% |
| V + Ti + Nb | Below 0.15% |
The flange was also supplied in a normalized condition and manufactured according to NACE MR0103 requirements for corrosion-sensitive environments.
30 inch ASTM A105N ASME B16.47 Series A weld neck flange for oil and gas project
Why ASTM A105N ASME B16.47 Series A Flanges Are Popular
Large-diameter ASME B16.47 Series A weld neck flanges are widely used in high-capacity industrial piping systems because they provide excellent structural integrity and sealing performance.
Main Advantages
- Strong mechanical strength
- Reliable welding performance
- Suitable for high-pressure systems
- Excellent sealing capability
- Stable performance in oil & gas service
- Compatible with large-diameter pipelines
Because of these characteristics, 30 inch ASTM A105N weld neck flanges are commonly selected for refinery, offshore, petrochemical, and pipeline transmission projects.
Strict Inspection and Quality Control
Haihao Group follows comprehensive inspection procedures throughout manufacturing to ensure every flange meets project specifications.
Inspection Scope
| Inspection Item | Status |
| Raw Material Inspection | Completed |
| Chemical Composition Analysis | Completed |
| Dimensional Inspection | Completed |
| Pressure Rating Verification | Completed |
| Surface Inspection | Completed |
| Packing & Export Inspection | Completed |
These inspection procedures help ensure that every ASTM A105N ASME B16.47 Series A weld neck flange delivered by Haihao Group performs reliably in demanding industrial conditions.
Applications of Large Diameter Weld Neck Flanges
The supplied flanges are commonly used in:
- Oil & gas transmission pipelines
- Refinery systems
- Offshore platforms
- Petrochemical facilities
- Water treatment plants
- Power generation projects
- Industrial pressure piping systems
For Dubai and Middle Eastern industrial projects, NACE MR0103 compliant weld neck flanges are especially important because of the challenging service environments and strict engineering standards.
Haihao Group Supports Global Pipeline Projects
Haihao Group supplies a complete range of industrial flanges, pipe fittings, seamless pipes, and custom piping components for international EPC contractors and distributors.
Our manufacturing capabilities include:
- Weld neck flanges
- Blind flanges
- Slip-on flanges
- Socket weld flanges
- Large diameter flanges
- Special alloy flanges
Products can be manufactured according to:
- ASME
- ASTM
- EN
- DIN
- GOST
- API
- NACE
With extensive export experience and strict quality management, Haihao Group continues to support industrial projects throughout the Middle East, Europe, and Asia.
If you are looking for a dependable supplier of ASTM A105N ASME B16.47 Series A weld neck flanges, Haihao Group can provide reliable manufacturing and global delivery support.
FAQ
What is ASME B16.47 Series A?
ASME B16.47 Series A is a standard covering large diameter steel flanges commonly used in industrial pipeline systems.
What is ASTM A105N material?
ASTM A105N is a normalized forged carbon steel material used for flanges and fittings in pressure piping applications.
Why is NACE MR0103 compliance important?
NACE MR0103 helps ensure the material is suitable for sour service environments where corrosion resistance is critical.
What is the advantage of weld neck flanges?
Weld neck flanges provide excellent strength, stress distribution, and leak resistance for high-pressure systems.
Can Haihao Group manufacture customized flanges?
Yes. Haihao Group can produce customized flanges according to size, pressure rating, material grade, and project specifications.