###### Editorial Note on [Part 148](/current/title-46/part-148?toc=1)

#### Editorial Note:

Nomenclature changes to part 148 appear by USCG-2012-0832, [77 FR 59783](https://www.federalregister.gov/citation/77-FR-59783), Oct. 1, 2012.

#### § 148.155 Stowage and segregation for potentially dangerous materials.

(a) A PDM must be stowed and segregated according to the requirements of this section and Table [148.155](/on/2024-09-23/title-46/section-148.155) of this section.

(b) When transporting coal—

(1) Coal must be stowed separate from materials of Class/division 1.4 and Classes 2, 3, 4, and 5 in packaged form; and separated from bulk solid materials of Classes 4 and 5.1;

(2) No material of Class 5.1, in either packaged or bulk solid form, may be stowed above or below a cargo of coal; and

(3) Coal must be separated longitudinally by an intervening complete cargo compartment or hold from materials of Class 1 other than Class/division 1.4.

(c) When transporting direct reduced iron (DRI)—

(1) DRI lumps, pellets, or cold-molded briquettes, and DRI hot-molded briquettes, must be separated from materials of Class/division 1.4, Classes 2, 3, 4, 5, Class 8 acids in packaged form, and bulk solid materials of Classes 4 and 5.1; and

(2) No material of Class 1, other than Class/division 1.4, may be transported on the same vessel with DRI.

(d) Petroleum coke, calcined or uncalcined, must be—

(1) Separated longitudinally by an intervening complete cargo compartment or hold from materials of Class/divisions 1.1 and 1.5; and

(2) Separated by a complete cargo compartment or hold from all hazardous materials and other potentially dangerous materials in packaged and bulk solid form.

Table [148.155](/on/2024-09-23/title-46/section-148.155)—Stowage and Segregation Requirements for Potentially Dangerous Material

| Potentially dangerous material | Segregate as for class listed1 | “Separate from” foodstuffs | Load only under dry weather conditions | Keep dry | Mechanical ventilation required | “Separate from” material listed | Special provisions |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Aluminum Smelting By-products or Aluminum Re-melting Byproducts | 4.3 | X | X | X | X | Class 8 liquids | |
| Brown Coal Briquettes | | | | | | See [paragraph (b)](/on/2024-09-23/title-46/section-148.155#p-148.155(b)) of this section | See [paragraph (b)](/on/2024-09-23/title-46/section-148.155#p-148.155(b)) of this section. |
| Charcoal | 4.1 | | | X | | Oily materials | |
| Coal | | | | | | See [paragraph (b)](/on/2024-09-23/title-46/section-148.155#p-148.155(b)) of this section | See [paragraph (b)](/on/2024-09-23/title-46/section-148.155#p-148.155(b)) of this section. |
| Direct reduced iron (A) | | | | | | See [paragraph (c)](/on/2024-09-23/title-46/section-148.155#p-148.155(c)) of this section | See [paragraph (c)](/on/2024-09-23/title-46/section-148.155#p-148.155(c)) of this section. |
| Direct reduced iron (B) | | | | | | See [paragraph (c)](/on/2024-09-23/title-46/section-148.155#p-148.155(c)) of this section | See [paragraph (c)](/on/2024-09-23/title-46/section-148.155#p-148.155(c)) of this section. |
| Ferrophosphorus | 4.3 | X | X | X | X | Class 8 liquids | |
| Ferrolilicon | 4.3 | X | X | X | X | Class 8 liquids | |
| Fluorospar | | X | | | | Class 8 liquids | |
| Lime, Unslaked | | | | X | | All packaged and bulk solid hazardous materials | |
| Linted Cotton Seed | | | | X | | | |
| Magnesia, Unslaked | | | | | | All packaged and bulk solid hazardous materials | |
| Metal Sulfide Concentrates | 4.2 | X | | | | Class 8 liquids | |
| Petroleum Coke | | X | | | | | See section 148.155(d). |
| Pitch Prill | 4.1 | | | | | | |
| Pyrites, Calcined | | X | X | X | X | | |
| Sawdust | 4.1 | | | X | | All Class 5.1 and 8 liquids | |
| Silicomanganese | 4.3 | X | X | X | X | Class 8 liquids | |
| Tankage | 4.2 | X | X | | | | |
| Vanadium | 6.1 | X | | | | | |
| Wood chips | 4.1 | | | | | | |
| Wood pellets | 4.1 | | | | | | |
| Wood pulp pellets | 4.1 | | | | | | |
| | | | | | | | |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1 See Tables 148.120A and B. | | | | | | | |