In which episode of One Piece did the Merry ship burn down?

The Merry was burned down in episode 312 of the TV version of One Piece.

The Straw Hats went to Judiciary Island to rescue Robin. When the Straw Hat Pirates were trapped on Judiciary Island, Merry (the ship spirit) begged Uncle Iceberg to let him sail one last time to save Luffy and his party. Man, the "Ship Spirit" transformed from the Merry successfully rescued Luffy and the others at the critical moment, but because the deadline had come and his lifespan was exhausted on the way, the "Ship Spirit" said a sentimental farewell to the Straw Hat Pirates. .

Luffy sent the Golden Merry off on its last journey with a cremation ceremony, thus ending the great and glorious mission of the Golden Merry. At that time, there was heavy snow all over the sky, like a farewell to the Merry.

Extended information:

The Golden Merry (Going Merry) is the original pirate ship of the Straw Hat Pirates. The Golden Merli is the first pirate ship of the Straw Hat Pirates. It is a "Caravel" with a skeleton structure and a triangular sail that uses the stern center steering method. The bow is a sheep's head and has a cute shape. He is one of the important partners of the Straw Hat Pirates.

Reference: One Piece_Baidu Encyclopedia