A Coal Tar Pitch (CTP) tanker is a specialized chemical tanker developed from conventional petroleum asphalt tankers. This vessel type undergoes significant modifications to meet enhanced damage stability requirements. In recent years, the widespread application of dual-fuel systems, particularly methanol, has presented significant challenges for damage stability design in such vessels. Taking an 8000 DWT petroleum asphalt tanker as a case study, this study analyzes its tank subdivision arrangements, loading characteristics, and damage stability performance. The study compares design requirements and damage stability criteria between petroleum and coal tar pitch asphalt tankers, and analyzes the impact of deck-mounted methanol fuel tanks on damage stability. Optimization measures including tank subdivision redesign, loading pattern adjustments, and flooding point reconfiguration are implemented to enhance vessel performance. These modifications ensure that the converted vessel complies with damage stability criteria when converting to a coal tar pitch asphalt tanker configuration.