Abstract: The corrosion factors of gas transmission pipeline are very complicated. Some of these factors are often changeable under different circumstances. What’s more, confirmation of these factors has its own uncertainty and mistiness. We used Array Grey Prediction method found a new model to predict pipeline' s
corrosion trend and introduce three typical data processing mode. Applying this model to predict one of Sichuan Gas Field's gas pipeline' s corrosion rate and corrosion depth, the counting result indicated this model’s prediction had little error to the fact,could be used to the locale exercise. This model oilers a
new method of gas transmission pipeline' s corrosion prediction.

Key words: pipeline corrosion, corrosion rate, corrosiondepth, GM(1, 1), Array Grey Prediction, model