Abstract: There are many differences for the technical and inspection requirements of marine pressure vessels for different purposes. The inspection requirements of pressure vessels are scattered in many chapters of different China Classification Society（CCS）rules. It is very difficult to master these requirements and apply skillfully in practical inspection work. This article is based on the approval inspection for liquefied natural gas fuel storage tank produced by a marine product manufacture. The inspection requirements of LNG fuel storage tank are summarized. It is hoped that relevant people can understand the inspection requirements of pressure vessels and master the works approval inspection requirements for LNG fuel storage tanks.