Convert the provided 2D piping drawing into a detailed 3D model. Model a steel pipeline composed of two straight sections connected by a central square flange with visible bolts. The pipe is 6-inch nominal diameter (NPS 6). Include two 90-degree elbows: one at the left end and one at the right end transitioning into a vertical drop. Preserve the proportions and layout shown in the 2D image: long horizontal run, central flange, and end elbow connected to a base flange. Model characteristics: - Pipe diameter: 6" (168 mm outside diameter) - Two straight segments aligned horizontally - One square flange in the middle with 4 bolts - Two 90° elbows (smooth radius) - Final vertical segment ending in a circular flange mounted on a base - Steel material, dark matte grey finish - Realistic shadows, soft lighting - Industrial style, accurate scale, smooth weld transitions Generate a full 3D perspective render that matches the geometry of the 2D drawing.