| Code | Description |
| JI | Master Control Station (MCS) |
| JP | Pneumatic and/or hydraulic Control panel, any Local Control Panel |
| JQ | I/O Remote cabinet |
| JT | Junction box |
| JW | Well head Control Panel |
| FCM | Flow Control Module |
| JE | Safety integrated System (SIS), Emergency shutdown (ESD)equipment |
| JG | Power Distribution Panel for control or safety equipment |
| JH | High Integrity Protection Pressure System (HIPPS) |
| JL | Safety (ESD /F&G) Unit Control Panel (UCP-S), Package Safety System (PLC based, or Relays based) |
| JU | Extinguishing gas panel, Deluge panel, Firefighting panel |
| JX | Flare ignition panel |
| JK | Process or Generic Unit Control Panel (UCP-C), Package Control System (PLC based, or Relays based) |
| JD | Process Control System (PCS)/ Distributed Control System equipment (DCS) |
| R* | Manual Valve |
| RB | Ball valve |
| UV | ON/OFF (NOT SAFETY) VALVE |
| RF | Butterfly valve |
| RC | Check valve |
| RD | Diaphragm valve |