Special type flange refers to non-standard, customized, complex and special-purpose flanges beyond standard dimensions. We design and manufacture special flanges for oil & gas, petrochemical, power, marine, metallurgy and engineering projects.Our special flanges include large-size, high-pressure, unusual bore, multi-branch, integrated, welded, special-facing and drawing-based custom flanges, meeting complex working conditions and special connection requirements.
Production Details
1.Drawing review and technical clarification
2.Material selection and mill certificate verification
3.Forging / ring rolling / blank forming
4.Heat treatment to improve mechanical properties
5.CNC precision machining (turning, milling, drilling, grinding)
6.100% dimensional inspection
7.NDT and pressure test as required
8.Surface treatment: anti-rust oil, passivation, painting
9.Permanent marking: size, material, heat No., drawing No.
10.Packaging and delivery
Product Feature and Application
Key Features
- Fully customized according to customer drawings
- High strength for heavy-duty and extreme conditions
- High precision CNC machining for perfect fit
- Special structure for complex installation space
- Excellent sealing and long service life
- Wide material selection for corrosion resistance
- Full material traceability and strict quality control
Typical Applications
- Non standard piping and equipment connections
- Oil & gas wellhead and manifold systems
- Offshore platform and marine engineering
- Petrochemical and refinery special pipelines
- Power plant boiler and high-temperature systems
- Metallurgy, mining and heavy machinery
- Large scale engineering and special pipeline projects
| Product Name | Special Type Flange |
| Standard | Non-standard, custom to drawings |
| Pressure Rating | PN6 – PN420, 150LB – 2500LB, 5K – 350K, API 10000–20000PSI |
| Nominal Diameter | DN10 – DN2000, 1/2″ – 78″ |
| Type | Special weld neck, slip-on, blind, threaded, lap joint, large-diameter, multi-hole, reducer, integrated, branch, etc. |
| Face Type | RF, FF, RTJ (BX/RX/R), TG, V, raised face, flat face, special facing |
| Materials | Carbon steel, alloy steel, stainless steel, duplex steel, MONEL, INCONEL, HASTELLOY |
| Certification | EN 10204 3.1, MTC, ISO 9001, API 6A, ABS, DNV |
| Testing | Dimensional, UT, MT, RT, hardness, hydrostatic test |
Production Display
Our factory is equipped with large forging presses, heavy-duty CNC machines, large diameter machining equipment and professional testing labs. We support third party inspection by SGS, BV, TÜV, DNV, ABS.
Product Transport Package
- Surface: Anti corrosion oil, varnish, black paint, passivation
- Packaging: Wooden case, steel pallet, reinforced packaging
- Label: Drawing No., part name, material, heat No., quantity
- Documents: Packing list, MTC, test report, certificate
- Transportation: Sea, land, air and global delivery
After-sales Service
- Professional drawing review and design optimization
- Customized solution for special working conditions
- Timely production and progress feedback
- Fast after-sales response and technical support
- Quality re-inspection and correction guarantee
- Stable long-term supply for special projects
Why Choose Us
- 19 years of special flange manufacturing experience
- Strong custom forging and machining capacity
- Flexible small batch & mass production
- Strict quality control and full testing
- Competitive factory direct price
- Professional service for global special projects
Contact us with your drawings for special type flange quotation and solution.
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