An Account for Pigging the Aershan—Saihantala 0il Pipeline

It is the first pigging work after completion of the Aershan—Saihantala Oil Pipeline Project. The paper includes an account of the whole pigging process. It keeps a detail record of different problems appeared before and after the pigging work and of various measures adopted thereupon. It also concludes the experiences and the lessons in pipeline construetion and pigging work, thus has some reference for the future work.