Random Section of GOST 21.609-83
3.1. Layout drawings of gas pipelines and equipment shall be made under GOST 21.101-79 subject to this Standard.
3.2. Plans, sections and views
3.2.1. Plans, sections and views shall be drawn at the scale of 1:100 or 1:200, connections and fragments of plans, sections and views shall be drawn at the scale of 1:10-1:100 under GOST 2.302-68.
In case of small buildings or structures when drawing of fragments is not feasible, plans, sections and views may be drawn at the scale established for fragments.
3.2.2. Gas pipelines placed one upon another shall be conditionally drawn on plans as parallel lines.
3.2.3. Gas pipelines, equipment and fittings shall be shown on plans using conventional graphic symbols, and the equipment for which no graphic symbols are provided shall be drawn using simplified graphic symbols.
Gas pipelines with a diameter of 100 mm or over shall be drawn on fragments and parts as two lines.
3.2.4. Coordinate axes of a building (structure) and distances between them (for residential buildings the distance between the axes of the sections shall be indicated) shall be shown on plans, sections and views;
building structures and equipment to which gas and air are supplied and from which combustion products are removed. Building structures and equipment are shown as continuous lines;
grade level of the floor and principal sites;
dimensional adjustments of gas units and equipment, inlets (outlets) and gas pipelines supports to the coordinate axes or elements of building structures;
dimensions of operational passages;
levels or elevations of installation of the equipment (if necessary).
Name of premises (type of premises in residential buildings) and category of facilities classified according to explosion, explosion/fire and fire hazard (in the rectangular of 5×8 mm) shall also be given, and elevations of pipeline axes and the top of the discharge gas pipeline (drill pipe) shall be shown on sections and views.
The description of buildings and category of facilities classified according to explosion, explosion/fire and fire hazard may be given in the explication of the buildings in accordance with Form 2 under GOST 21.501-80.