In　order　to　understand　the　heat　transfer　characteristics　of　molten　salt　and　testify　the　validity　of　the　well　known　empirical　convective　heat　transfer　correlations,　an　experimental　study　on　forced　convective　heat　transfer　with　molten　salt　in　a　circular　tube　was　conducted.　Molten　salt　circulations　were　realized　and　operated　in　a　specially　designed　system　over　1000　h.　The　average　forced　convective　heat　transfer　coefficients　of　molten　salt　were　determined　by　least-squares　method　based　on　the　measured　data　of　flow　rates　and　temperatures.　Finally,　heat　transfer　correlations　of　transition　flow　and　turbulent　flow　with　molten　salt　in　a　circular　tube　were　obtained　and　good　agreement　was　observed　between　the　experimental　data　of　molten　salt　and　the　well-known　correlations　presented　by　Sieder-Tate,　Hausen　and　Gnielinski,　respectively.