On  Feb. 15, the heaviest equipment (hydrogenation reactor R-69331) of the NDA  project in Saudi Arabia was hoisted in place successfully. The reactor was heavy  in 401 tons, the diameter was about 4m, and its length was 27m. The hoisting was  mainly performed by a main crawler  crane  with capacity of 600t and supported by a crawler  crane  with capacity of 280t. After the major crane travelled about ten meters, the  reactor was installed in place and rested on the foundation which was paved with  20 bolts in a stable manner, and the whole hoisting process lasted for 3 hours.