GOST 9399-1981
Threaded steel flanges for Pn 20-100 MPa (200-1000 kgf/sq sm). Specifications

Standard No.

GOST 9399-1981

Release Date

1981

Published By

RU-GOST R

Latest

GOST 9399-1981

Replace

GOST 9399-1975

Scope

This standard applies to steel threaded flanges used in the chemical and petrochemical industries for valves

GOST 9399-1981 Referenced Document

• GOST 1050-1988 Carbon structural quality steel gauged bars with special surface finish. General specifications*， 1988-04-19 Update
• GOST 12816-1980 Flanges for valves, fittings and pipelines for Pnom from 0,1 to 20 MPa (from 1 to 200 kgf/sq sm). General technical requirements
• GOST 1497-1984 Metals. Methods of tension test*， 1984-04-19 Update
• GOST 16093-1981 Basic norms of interchangebility. Metric screw thread. Tolerances. Clearance fits
• GOST 20072-1974 Heat-resistant steel. Specifications
• GOST 24643-1981 Basic norms of interchangeability. Tolerances of form and position of surfaces. Numerical values
• GOST 24705-1981 Basic norms of interchangeability. Metric screw thread. Basic dimensions
• GOST 28338-1989 Tube connections and fitting. Nominal diameters. Series*， 1989-04-19 Update
• GOST 356-1980 Valves and parts of pipe-lines. Nominal, test and operational pressures. Series
• GOST 4543-1971 Structural alloy steel bars. Specifications
• GOST 7564-1997 Rolled products. General rules of sampling, rough specimens and test pieces selection for mechanical and technological testing*， 1997-04-19 Update
• GOST 8479-1970 Construction carbon and alloy steel forgings. General specification
• GOST 9012-1959 Metals. Method of Brinell hardness measurement*， 2024-04-19 Update
• GOST 9454-1978 Metals. Method for testing the impact strength at low, room and high temperature

GOST 9399-1981 history

• 1981 GOST 9399-1981 Threaded steel flanges for Pn 20-100 MPa (200-1000 kgf/sq sm). Specifications
• 0000 GOST 9399-1975