Valves are shown with identification number and a handwheel is drawn with stem fully extended.For flanged joints a small gap between dimension lines will be shown to indicate a gasket.Flanges are shown as thick lines drawn to the scaled outsite diameter of the flange.In double line representation the actual size to scale is drawn with center line marked in chain-dotted lines. In single line representation only the center line of the pipeline is drawn using a solid line.

Pipelines on a Piping Arrangement are shown by single lines and double lines. Therefore the Piping Arrangement show parts of a process plant. Important details are often in a larger scale in the same drawing shown.Įven as a Plot Plan, a whole process plant usually can not be given on a readable drawing.

Alloy steel and other special materialsįurther (if possible) all equipment, instrument connections, with the tag numbers will be shown on a Piping Arrangement.

Order of importance of pipe lines in a Piping Arrangement. The major primary beams and secondary beams are also shown, even as Utility stations so that the most efficient route for utilities can be determined. Process equipment and piping have priority on the Piping Arrangement. In complex systems, where orthographic views do not illustrate the details of the design, pictorial view in isometric presentation is made for clarity. Orthographic drawings are views (front, side, top etc.) of an piping system, and in Piping they are called 'Piping Arrangements'.Īn orthographic view shows only one side, and therefore multiple drawings (views) are necessary to show a complete Piping Arrangement. There are two types of views in hand-drawn piping drawings.

Orthographic piping drawing