$59 Petroleum Refinery 3D model by hewstehbens. Available on CGTrader with 806985 polys and 852751 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 26.7 MB), OBJ (OBJ, filesize: 23.2 MB), FBX (Autodesk FBX, filesize: 29.8 MB), DWG (AutoCAD, filesize: 30.5 MB), DXF (DXF, filesize: 38.7 MB), STL (Stereolithography, filesize: 23.5 MB)