Complex Special Shape Flanges
- Multiple geometries: Round, oval, square, and complex non-standard flange shapes according to customer design.
- High-grade materials: Available in SS304, SS316, F51, F55, and 904L for excellent strength and corrosion resistance.
- Precision machining: CNC turning and milling ensure accurate profiles, bore sizes, and bolt-hole locations for tight, repeatable fits.
- Flexible connection design: Custom drilling patterns and sealing faces to match special nozzles, valves, manifolds, or equipment interfaces.
Technical Specifications
| Item | Specification |
| Product name | Complex Special Shape Flanges |
| Shapes available | Round, oval, square, irregular/custom profiles |
| Dimensions | According to customer drawings and project requirements |
| Materials | SS304, SS316, F51, F55, 904L |
| Manufacturing process | CNC turning, CNC milling, drilling, threading, and profiling |
| Surface finish | Machined finish; special finishes available on request |
| Dimensional accuracy | Machined according to specified tolerances on customer drawing |
| Sample policy | 2 pcs free samples (freight negotiable) |
| Standards/documentation | Manufactured to customer-specified standards; material certificates available |
| Typical order quantity | From prototypes / small batches to series production |
Customization Options
- Shape and profile (round, oval, square, multi-corner, contoured edges).
- Overall dimensions, thickness and hub length.
- Bore size, step bores and counterbores.
- Bolt-hole quantity, diameter, pitch circle diameter and special drilling patterns.
- Sealing face type (RF, flat face, groove, tongue-and-groove, RTJ, custom).
- Material grade selection: SS304, SS316, F51, F55, 904L or specified alloys.
- Surface roughness and finishing (machined, polished, coated if required).
Applications
- Special nozzles and connections on reactors, columns and pressure vessels.
- Compact manifolds, skids and modular process packages.
- Non-standard equipment interfaces for pumps, compressors and filters.
- Piping systems with space limitations or special routing requirements.
- Corrosive and high-reliability services in oil & gas, petrochemical and chemical plants.
- Custom machinery and process equipment requiring unique flange geometries.
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.