GOST TYPE 05 flange is a threaded pipe flange specified in GOST 33259-2015. It has an internal thread that directly connects with externally threaded pipes, suitable for non-welded piping systems. It is widely used in small-diameter, low-pressure, flammable or explosion-proof pipelines. Our GOST TYPE 05 flanges are precisely machined to ensure stable thread fitting and reliable sealing.
Production Details
Each GOST TYPE 05 flange is produced under strict quality control:
Raw material inspection with mill certificates and spectral analysis
Precision forging or plate forming
CNC machining for accurate thread, bolt holes and sealing face
100% dimensional inspection using calibrated gauges
Visual inspection for surface defects
Anti-corrosion oil coating and permanent marking
Full material traceability
Product Feature and Application
Key Features
- Fully compliant with GOST 33259-2015 standard dimensions
- Internal threaded design for quick connection without welding
- High machining precision for stable thread matching
- Suitable for non-welded and maintenance-convenient systems
- Good interchangeability with GOST threaded pipes and valves
- Compact structure and easy installation
Typical Applications
- Small-diameter utility piping systems
- Explosion-proof and non-welded industrial pipelines
- Chemical, petroleum and gas auxiliary lines
- Maintenance and modification engineering
- Russian and CIS standard threaded piping
| Standard | GOST 33259-2015, TYPE 05 |
| Pressure Rating | PN 6, PN 10, PN 16, PN 25 |
| Nominal Diameter | DN 10 – DN 100 |
| Type | Threaded Flange |
| Face Type | Type A (FF), Type B (RF) |
| Materials | Carbon steel St20, St3sp; Stainless steel 12Х18Н10Т |
| Working Temperature | −20 °C – 300 °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 05 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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