H - Heaters and Stacks
| Stem sub | Rest | Detail | Level | UoM | Description |
|---|---|---|---|---|---|
| H | 1 | PC | Heaters & Stacks | ||
| H* | 2 | Heater & Stack Group | |||
| HB | 2 | PC | Boilers | ||
| HC | 2 | PC | Independent Stacks | ||
| HD | 2 | PC | Independent Ducts | ||
| HF | 2 | PC | Field Fabricated Heaters | ||
| HL | 2 | PC | Inline Burners | ||
| HN | 2 | PC | Incinerators | ||
| HS | 2 | PC | Shop Fabricated Heaters | ||
| HW | 2 | PC | Waste Heat Boilers | ||
| H | ****** | 3 | Equipment Number | ||
| H | ...... | 3 | PC | - any code - |