EN 10204 3.1 Certified Flanges
- EN 10204 3.1 Certification: Each flange is delivered with a 3.1 material test certificate for full chemical and mechanical traceability.
- High Surface Quality: Smooth, carefully machined surfaces without scratches support reliable sealing and professional appearance.
- Precision Tolerances: Dimensional tolerance controlled within 0.05 mm to ensure accurate fit-up and consistent assembly.
- Optimized Size & Weight Range: Diameter ranges from 50 mm to 1200 mm, with single flange weight no more than 80 kg.
Technical Specifications
| Item | Specification |
| Product Name | EN 10204 3.1 Certified Flanges |
| Certification Standard | EN 10204 Type 3.1 Material Test Certificate |
| Diameter | 50 mm – 1200 mm |
| Maximum Unit Weight | ≤ 80 kg per flange |
| Dimensional Tolerance | Within 0.05 mm (according to the approved drawing) |
| Surface Condition | Smooth machined surface, no visible scratches |
| Main Materials | Stainless steel, super duplex steel, F55, F60, 904L |
| Sample Policy | 2 pcs free samples available for EN 10204 3.1 Certified Flanges |
| Production Basis | Manufactured strictly according to customer drawings and technical requirements |
| Typical Use | Critical piping and equipment connections requiring certified and traceable flange materials |
Customization Options
- Custom flange diameters, thicknesses, and bore sizes according to project drawings.
- Various flange types: welding neck, slip-on, blind, lap joint, and others on request.
- Different sealing faces: RF, FF, RTJ, tongue & groove, and male–female, as per specification.
- Drilling patterns are customized to match bolt circles, hole diameters, and bolt quantities.
- Pressure classes and standards (e.g., ASME/ANSI, DIN, EN) are defined by customer requirements.
Applications
- Oil & gas pipelines and process manifolds
- Petrochemical and chemical processing plants
- Offshore and marine piping systems
- Power generation and high-temperature service lines
- Desalination and water treatment facilities
Raw Materials
We produce and purchase raw materials strictly according to customer requirements, ensuring full compliance with project specifications, mechanical properties, and international standards.
Main steel grades we produce:
Steel Grade | Standards | Classification | Products |
1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4871 | EN 10222-5 | L | Forged flanges and Forged parts |
F304, F304L, F316, F316L, F321, F316T, F310, F904L | ASTM A182 | L | Forged flanges and Forged parts |
F51, F53, F55, F60 | ASTM A182 | L | Forged flanges and Forged parts |
LF2 | ASTM A350 | V | Forged flanges and Forged parts |
F11, F22 | ASTM A182 | V | Forged flanges and Forged parts |
A105 | ASTM A105 | N | Forged flanges and Forged parts |
CNC Machining Capabilities
We operate multiple machining lines and CNC centers engineered to deliver tight tolerances, superior surface finishes, and consistent quality for complex forged components.
Equipments and Quantities | ||
Item No. | Equipments | Quantities |
1 | Ramp CNC lathe | 6 |
2 | Normal lathe | 8 |
3 | Machining center | 4 |
4 | CNC lathe | 10 |
Inspection & Quality Control
To ensure the high quality of non-standard flanges, we are equipped with professional testing and inspection systems:
- 3D Measurement Equipment
- Ultrasonic Cleaning Machine
- Physical & Chemical Testing
- Dimensional Inspection
Packaging for Non-Standard Flanges
We provide protective packaging options according to customer needs:
- Anti-rust treatment
- Plastic film wrapping
- Wooden cases
- Wooden pallets
- Custom packaging available
Why Choose Boberry
Complete In-House Manufacturing
Integrated forging, heat treatment, machining, and inspection ensure stable quality, faster lead times, and full control over every production stage.
European-Market Proven Quality
Long-term supply to Germany, Austria, Switzerland, and Nordic countries demonstrates our ability to meet strict technical standards and customer expectations.
Custom Engineering Support
Tailor-made stainless-steel parts based on your drawings, with trial samples available to validate design, performance, and fit before full-scale production.