Ship Bottom Drain Plug is the water & oil drain plug of the water tank & oil tank on the ship bottom. It has two types, Type A & Type B.
Design Standard: CB/T254-1997 (not suitable for the bottom plate less than 6mm)
| Type | Name | Plug | Applicable Place | |
| Type & Code | Material | |||
| A | Bottom Drain Plug without Shoulder | Hexagonal (O) | Stainless Steel | Ship Bottom Oil Tank |
| Rectangular (W) | Ship Bottom Water Tank | |||
| B | Bottom Drain Plug with Shoulder | Hexagonal (O) | Brass | Ship Bottom Oil Tank |
| Rectangular (W) | Ship Bottom Water Tank | |||
*It should be done the seal test with the tanker after the installment.