This part of ISO 6412 specifies simplified represen-tations used in technical drawings for terminal fea-tures of ventilation and drains in pipeline systems.
BS EN ISO 6412-3:1996 history
2018BS EN ISO 6412-3:2018 Technical product documentation. Simplified representation of pipelines. Terminal features of ventilation and drainage systems
1996BS EN ISO 6412-3:1996 Technical drawings - Simplified representation of pipelines - Terminal features of ventilation and drainage systems