Symbol 3865 from ISO 7000 - Title/Meaning: Boundary cooling Function/description: To indicate a boundary is being cooled to reduce heat transfer.
pay attention to orientation of symbolAdditional information: 
The position of flame, wall and water hose symbol may be repositioned to intuitively show the hot side and cooled side of the wall
Red colour may be used for flame symbol for more intuitive recognition
Own work using: iso.org/obp/graphics/grs/ef8694be-ae85-432f-8edf-aa033b1c9cfa 200.png
Vectorization:  Mrmw