Key points regarding GOST Flange

GOST (Gosudarstvennyy Standart) is the national standardization system in Russia, and GOST flanges are designed and manufactured based on Russian standards. Here are key points regarding GOST flanges:

1. GOST Flange Standards: GOST flanges adhere to standards set by the Russian national standardization system. Common standards for GOST flanges include GOST 12820, GOST 12821, GOST 33259, and GOST 33260.

2. Flange Types: GOST flanges come in various types, including weld neck, slip-on, threaded, socket weld, blind, and lap joint. Each type is designed for specific applications and joining methods.

3. Pressure Ratings: GOST flanges are available in different pressure ratings, such as PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The pressure rating indicates the maximum pressure the flange can withstand at a given temperature.

4. Materials: GOST flanges are manufactured from various materials, including carbon steel, stainless steel, and alloy steel. The choice of material depends on factors such as the application, temperature, and corrosion resistance requirements.

5. Facings: Flange facings are important for sealing. Common facings for GOST flanges include flat face (FF), raised face (RF), and ring-type joint (RTJ). The facing type affects the sealing performance of the flange.

6. Marking and Identification: GOST flanges are typically marked with information such as the manufacturer's name or logo, flange size, pressure rating, material specification, and the GOST standard number.

7. Dimensions: GOST flanges have specific dimensions and sizes, and they are classified based on nominal sizes and nominal pipe sizes (NPS). The flange dimensions are standardized for compatibility.

8. Applications: GOST flanges are widely used in various industries in Russia and countries that follow the GOST standards. They are employed in piping systems to connect pipes, valves, and other components.

9. Testing and Quality Control: Manufacturers follow stringent quality control measures and testing procedures to ensure that GOST flanges meet the specified standards. Common tests include hydrostatic testing, visual inspection, dimensional checks, and material testing.

10. Compatibility: GOST flanges are designed to be compatible with other flanges that adhere to the same GOST standard. This interchangeability facilitates the easy replacement or modification of components within a piping system.

It's important to refer to the specific GOST standard documentation for detailed information and specifications based on the particular GOST standard in use.