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Gost 9399 - Flanges

This standard applies to steel threaded flanges used in the chemical and petrochemical industries for fittings, fittings and pipelines with a lens seal.

Pressure
Ru St. from 20 to 100 MPa (200-1,000 kgf/cm²)
Diameters
DN 6 to 200 mm
Temperature
from minus 50 to plus 510 °С
materials
Art. 35, 40, 45, 30H, 40H, 38HL, 35HM, 30HMA, 25H1MF, 25H2M1F, 20H3MWF