To solve the problem of structuring ship pipe piece processing family, the paper pointed a clustering method based on coding and ART2 neural network. In the pipe fittings coding and comprehensive consideration of pipe pallet setting time and the structure technology characteristics, we achieved the automatic clustering of the pipe through ART2 neural network and reasonable pipe piece processing family. The result of experiment indicates that ART2 network has good adaptability and stable classification to deal with structuring ship pipe piece processing family.