Piping drawings use orthographic and pictorial views to represent piping layouts. Orthographic views like plans and elevations show piping layout in 2D, while pictorial isometric views provide clarity for complex 3D piping systems. Piping drawings follow standards for sheet sizes and include title blocks, equipment locations, piping routes dimensioned to scale with line numbers and specifications. Developing piping drawings requires considering process requirements, performance, economics and ensuring no interference between piping and other plant infrastructure.