EN 1092-1 P355GH and P250GH Flanges Supplied to Bulgaria by Haihao Group
Haihao Group recently completed the production and shipment of several EN standard flange products for a customer in Bulgaria. The order included EN 1092-1 P355GH weld neck flanges, blind flanges, and plate flanges manufactured for industrial pipeline systems requiring reliable sealing performance and low-temperature impact resistance.
All flange products were produced according to customer specifications, including RF serrated sealing faces and -20°C impact testing requirements, ensuring dependable performance in demanding operating conditions.
Shipment Details
EN 1092-1 Flange Products
| Product | Size / Thickness | Pressure Rating | Material Grade | Standard |
| Weld Neck Flange B1 | DN500 × 25 mm | PN25 | Grade P355GH | EN 1092-1 |
| Blind Flange B1 | DN500 | PN25 | Grade P355GH | EN 1092-1 |
| Plate Flange B1 | DN600 | PN10 | Grade P250GH | EN 1092-1 |
Customized Technical Requirements
For this Bulgaria project, the customer requested several additional technical specifications to ensure long-term pipeline safety and sealing reliability.
Key Technical Features
- RF (Raised Face) sealing surface
- Serrated flange facing finish
- -20°C impact testing requirement
- European standard EN 1092-1 compliance
The EN 1092-1 P355GH weld neck flange products supplied by Haihao Group were carefully machined to achieve accurate sealing face dimensions and surface finish quality.
EN 1092-1 P355GH weld neck flanges blind flanges and plate flanges ready for shipment
Advantages of EN 1092-1 P355GH Weld Neck Flanges
The EN 1092-1 P355GH weld neck flange is widely used in pressure piping and industrial process systems because of its excellent mechanical performance and weldability.
Key advantages include:
- Good strength under pressure conditions
- Excellent welding performance
- Reliable sealing capability
- Suitable for low-temperature service
- Stable performance in industrial environments
Because of these properties, the EN 1092-1 P355GH weld neck flange is commonly applied in petrochemical plants, energy systems, water treatment facilities, and industrial construction projects.
The EN 1092-1 P355GH weld neck flange supplied in this order also met low-temperature impact testing requirements, helping improve operational safety in cold environments.
Importance of RF Serrated Sealing Faces
The RF serrated sealing face is designed to improve gasket grip and sealing efficiency.
Benefits include:
- Better sealing performance
- Reduced leakage risk
- Improved gasket stability
- Suitable for pressure pipeline systems
Haihao Group uses precision machining equipment to ensure the serrated finish quality of each EN 1092-1 P355GH weld neck flange product.
Strict Quality Inspection Before Shipment
Before delivery, all flange products underwent comprehensive inspection procedures, including:
- Material verification
- Dimensional inspection
- Surface finish inspection
- Impact testing at -20°C
- Marking and packaging verification
Each EN 1092-1 P355GH weld neck flange was carefully packed to ensure safe transportation to Bulgaria.
Haihao Group Supports International Pipeline Projects
Haihao Group supplies industrial flanges, fittings, and piping components to customers around the world.
The company provides:
- EN standard flanges
- ASME and ASTM flange products
- Customized flange machining
- Low-temperature tested products
- Professional export support
With strong manufacturing capability and strict quality control, Haihao Group continues to support industrial projects throughout Europe, Asia, the Middle East, and other international markets.
FAQ
What is EN 1092-1?
EN 1092-1 is a European standard covering flanges and their dimensions for industrial piping systems.
What is P355GH material used for?
P355GH is a pressure vessel steel grade widely used in boilers, pressure equipment, and pipeline systems.
Why is -20°C impact testing important?
Impact testing at low temperature helps verify the toughness and safety performance of flange materials in cold environments.
What is an RF serrated sealing face?
An RF serrated face is a raised flange sealing surface with grooves designed to improve gasket sealing performance.
Can Haihao Group manufacture customized EN standard flanges?
Yes. Haihao Group can provide customized flange products based on EN, ASME, ASTM, and project-specific requirements.