2021GOST 21.710-2021 System of design documents for construction. Rules for execution of the working documentation of external gas pipelines
1985GOST 21.610-1985 System of building design documents. Gas supply. Outside gas pipe-lines. Working drawings
GOST 21.710-2021 System of design documents for construction. Rules for execution of the working documentation of external gas pipelines was changed to GOST 21.610-1985 System of building design documents. Gas supply. Outside gas pipe-lines. Working drawings.