This standard applies to cone valves and establishes the construction lengths of cast straight and three-way couplings and flanges
GOST 14187-1984 Referenced Document
GOST 12815-1980 Flanges for valves, fittings and pipelines for Pnom from 0,1 to 20 MPa (from 1 to 200kgf/sq sm). Types. Connecting dimensions and dimensions of sealing surfaces
GOST 356-1980 Valves and parts of pipe-lines. Nominal, test and operational pressures. Series
GOST 6527-1968 Female ends with pipe cylindrical thread. Dimensions