A GRAPHICAL SYMBOLS FOR PIPING SYSTEMS AND PLANT
APPENDIX A GRAPHICAL SYMBOLS FOR PIPING SYSTEMS AND PLANT A 3. Upshot heater Where complex burners are employed the ''burner block'' may be detailed elsewhere on the drawing, thus Detail A Detail A Vessels and Tanks Drum or simple pressure vessel (basic symbol) Knockout drum (with demister pad) Tray column (basic symbol) Tray column Trays should be numbered from the bottom; .
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