Finished Machined Flanges
- Non-Standard Forging Basis: Flanges are produced from non-standard forgings to meet special size, load and connection requirements.
- Large Size & Weight Capacity: Product range covers 5kg to 60000kg, up to 6.5m outside diameter and 13m length.
- Flexible Machining Capability: Flanges can be machined with grooves, holes, threads, and special profiles by turning, milling and CNC machining.
- Heavy-Industry Oriented: Designed for demanding applications in oil & gas, metallurgy, power generation, nuclear and marine industries.
Technical Specifications
| Item | Specification |
| Product Name | Finished Machined Flanges |
| Manufacturing Basis | Non-standard forgings and finished machining according to customer drawings |
| Machining Processes | Turning, milling, CNC machining, drilling, threading, and groove machining |
| Main Functions | Bolt holes, grooves, threads and precision sealing/bearing surfaces |
| Main Applications | Marine, Oil & Gas, Metallurgy, Power Generation, Nuclear, General industrial use |
| Production Size Basis | Fully according to the customer’s drawing |
| Weight Range | Approx. 5kg – 60000kg per flange |
| Maximum Dimensions | Up to 6.5m maximum outside diameter; up to 13m length (for shaft or ring-type components) |
| Material – Carbon Steel | Carbon steel grades as specified in drawings (e.g. typical structural and pressure steel grades) |
| Material – Stainless Steel | Austenitic and special stainless steels according to project requirement |
| Material – Alloys | Corrosion-resistant alloys, super alloys, die steel, structural alloy steel |
| Machining Accuracy | According to customer tolerance requirements and project standards |
Customization Options
- Custom flange dimensions: outer diameter, inner diameter, thickness, and hub dimensions according to drawings.
- Special drilling patterns: bolt circle diameters, number of bolts, hole diameters, and slot shapes.
- Groove and thread machining: sealing grooves, keyways, O-ring grooves, and internal and external threads.
- Design for specific standards or projects: matching ASME/ANSI, DIN/EN, GB, or customer-specific specifications.
- Optional machining combinations: turning + milling + drilling + boring + threading in one process flow.
Applications
- Oil & Gas industry: wellhead equipment, manifolds, gathering pipelines, and high-pressure process lines.
- Metallurgy: steel plant pipelines, high-temperature and high-pressure process connections.
- Power Generation: steam and gas turbine systems, boiler connections, cooling water, and auxiliary piping.
- Nuclear: safety-related and auxiliary piping systems that require high reliability and traceable materials.
- Marine & Offshore: ship pipelines, offshore platform process lines, and subsea-related equipment connections.
- General Industry: heavy machinery, process equipment, and pressure vessels that need custom, non-standard flange connections.
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.