1983GOST 22802-1983 Assembly units and pipeline parts. Flanged and armed open T-branches for Pnom 9,81-98,1 MPa (100-1000 kgf/sm sq). Construction and dimensions
1981GOST 24802-1981 Level meters for liquid and solids. Terms and definitions
1974GOST 2.802-1974 Unified system of design documentation. Mock-up method of desing. Technical information on operating model