GOST TYPE 02 flange is a hubbed welded flange specified in GOST 33259-2015 (replacing GOST 12821-80). It has a short hub structure for fillet welding onto pipes, offering higher rigidity and stability than TYPE 01. It is widely used in medium-pressure water, gas, oil and industrial fluid pipelines. Our GOST TYPE 02 flanges are precisely forged and CNC machined to ensure perfect interchangeability and reliable performance.
Production Details
Each GOST TYPE 02 flange is produced under strict quality control:
Raw material inspection with mill certificates and spectral analysis
Precision closed-die forging for optimized grain structure
Controlled heat treatment for stable mechanical properties
High-precision CNC machining for hub, face and bolt holes
100% dimensional inspection by calibrated gauges and CMM
Visual inspection and optional MT/UT non-destructive testing
Anti-corrosion oil coating and permanent marking
Full material traceability
Product Feature and Application
Key Features
- Fully compliant with GOST 33259-2015 standard dimensions
- Short hub design improves strength and reduces stress concentration
- High precision and full interchangeability with GOST equipment
- Good pressure resistance and fatigue resistance
- Easy welding and installation
- Suitable for medium-pressure and medium temperature systems
Typical Applications
- Industrial water, gas and oil pipelines
- Petrochemical and chemical process piping
- Heating, boiler and auxiliary systems
- Construction and utility engineering
- Russian, CIS and Eastern European standard projects
| Standard | GOST 33259-2015, TYPE 02 |
| Pressure Rating | PN 6, PN 10, PN 16, PN 25, PN 40 |
| Nominal Diameter | DN 10 – DN 1200 |
| Type | Hubbed Welded Flange |
| Face Type | Type A (FF), Type B (RF) |
| Materials | Carbon steel St20, St3sp; Stainless steel 12Х18Н10Т, 10Х17Н13М2Т |
| Working Temperature | −20 °C – 350 °C |
| Certification | EN 10204 3.1 MTC |
Production Display
Our ISO 9001 certified factory is equipped with advanced forging lines, heavy-duty CNC machining centers and professional testing laboratories. Full production process is traceable. Third-party inspection by SGS, BV, TÜV is available upon request.
Product Transport Package
- Surface treatment: Anti-corrosion oil, black paint or varnish
- Packaging: Plastic film, woven bag, export wooden case, steel pallet
- Labeling: Size, pressure, material, standard, heat number, batch
- Documents: Commercial invoice, packing list, certificate of origin, material test certificate
- Transportation: Sea, land and express delivery to global markets
After-sales Service
We provide full life-cycle technical support for GOST TYPE 02 flanges:
- Professional consultation on selection, welding and installation
- Custom sizes, materials and drilling per customer drawings
- Timely response to after-sales inquiries and quality claims
- Remote technical guidance and on-site support
- Stable long-term supply for large-scale projects
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