Haihao Group Supplies EN 1092-1 ASTM A105 Large Diameter Flanges to India
Haihao Group recently completed the production and shipment of a batch of EN 1092-1 ASTM A105 flanges for a customer in India. The order included large-diameter DN1800 slip-on flanges and DN1800 blind flanges with PN10 pressure rating, manufactured strictly according to customer drawings and technical specifications.
The project required precision machining, third-party witnessed testing, comprehensive inspection documentation, and enhanced surface protection during transportation. With extensive experience in custom flange manufacturing, Haihao Group successfully delivered products that fully complied with the client’s engineering requirements.
Shipment Details
| Product | Size | Pressure Rating | Material | Standard | Surface Protection |
| Slip-On Flange RF | DN1800 | PN10 | ASTM A105 | EN 1092-1 | Anti-rust Oil |
| Blind Flange RF | DN1800 | PN10 | ASTM A105 | EN 1092-1 | Anti-rust Oil |
Precision Manufacturing According to Customer Drawings
This India project required all products to be manufactured strictly according to customer-provided engineering drawings. Haihao Group’s technical team carefully reviewed every dimensional requirement before production.
The flanges featured:
- Precision serrated facing
- RF sealing surface
- Surface roughness of 125 AARH (Ra 3.2)
- Tight machining tolerances
- Large-diameter fabrication capability
The serrated finish helps improve gasket sealing performance in industrial pipeline systems operating under demanding conditions.
Large diameter EN 1092-1 ASTM A105 DN1800 flanges shipment
Strict Quality Inspection and Third-Party Witness Testing
For this order, the customer required complete inspection documentation issued by a CNAS-certified laboratory and witnessed by a third-party inspection agency.
Inspection Documents Included:
- Chemical composition test report
- Mechanical property test report
- Hardness test report
- Impact test report
- Non-destructive testing (NDT) report
- Heat treatment report
- Original mill test certificate (MTC)
Haihao Group strictly followed all inspection procedures to ensure every EN 1092-1 ASTM A105 flange met project requirements before shipment.
Enhanced Protection for Large-Diameter Flanges
Because of the large flange dimensions and precision-machined sealing surfaces, additional protective measures were required during packing and transportation.
Protective Measures Included:
- Protective caps for flange faces
- Edge protection against impact damage
- Anti-rust oil coating
- Reinforced export packing
- Careful handling during loading
These measures help maintain sealing surface integrity and reduce the risk of transportation damage.
Why ASTM A105 EN 1092-1 Flanges Are Widely Used
The combination of ASTM A105 forged carbon steel and EN 1092-1 flange standard provides excellent strength, machinability, and sealing reliability.
Key Advantages:
- Good mechanical properties
- Excellent weldability
- Reliable pressure resistance
- Suitable for industrial pipeline systems
- Easy integration into European-standard piping networks
Large-diameter EN 1092-1 ASTM A105 flanges are commonly used in:
- Water treatment plants
- Petrochemical facilities
- Power generation projects
- Oil & gas systems
- Marine engineering
- Industrial infrastructure projects
Haihao Group’s Manufacturing Strength
Haihao Group has extensive experience producing:
- Slip-on flanges
- Blind flanges
- Weld neck flanges
- Large-diameter forged flanges
- Special custom flanges
- EN, ASME, DIN, and GOST standard flanges
Our production advantages include:
- Advanced CNC machining equipment
- Large forging capability
- Experienced engineering team
- Strict dimensional inspection
- International export experience
- Fast technical support
We continue to provide reliable flange solutions for customers across Europe, Asia, the Middle East, and other global markets.
Technical Features of the Shipment
| Technical Item | Specification |
| Product Type | Slip-On Flange RF / Blind Flange RF |
| Size | DN1800 |
| Pressure Rating | PN10 |
| Material | ASTM A105 |
| Standard | EN 1092-1 |
| Facing Finish | 125 AARH (Ra 3.2) |
| Inspection | CNAS Laboratory + Third-Party Witness |
| Surface Protection | Anti-rust Oil + Protective Caps |
| Destination | India |
Partner with Haihao Group for Custom Flange Projects
If you are searching for a reliable manufacturer of:
- EN 1092-1 ASTM A105 flanges
- Large-diameter forged flanges
- Custom RF flanges
- DN1800 industrial flanges
- EN standard flange suppliers
Haihao Group can provide complete production, testing, and export support for your project.
Our engineering team is ready to assist with drawings, material selection, technical documentation, and international inspection requirements.