In the growth of factory conservancy business trend, PT YIN have also succeeded to do maintenance work package with duration of short and long term execution like Turn-Around factory project of Pertamina Plaju , DKM Melamine Bontang, ammonia factory of KPA Bontang and Refurbishment Hydrogen Reformer project Pertamina Balongan.

PT YIN has also done maintenance project which have a long duration like Grissik Operation Support Conoco Phillips Project and Construction Services CPI.