All as-built drawings must be clearly stamped as As-built.However, bigger projects can use software, typed documents, etc. For small projects, as-built drawings are usually done by hand-marking with pens. The changes shall be marked in red ink over the original drawings.As-built drawings must be prepared during or immediately after the construction of the facility.They usually have the following features: Characteristic Features of As-Built DrawingsĮven though the creation of as-built drawings can vary a bit from one organization to another. The document is stamped as As-Built and the dates on which the changes are mentioned are clearly depicted. 1, for the as-built piping isometric, the pipe route change with proper dimension and component description is mentioned clearly in red ink.

Unanticipated obstacles confronted and solutions decided.Īs you can see in Fig.

Changes made as a result of the final inspection.Changes in materials, dimensions, installations, fabrications, locations, etc.In general, a typical as-built drawing should include the following details: As-built drawings record construction changes to produce sufficient information. 1 below shows a sample as-built drawing of a piping isometric.Īs-built documentation shall comprise the data that is critical for the safe and efficient operation of the plant or facility after commissioning and handover. As-built drawings are also known as record drawings. In a single sentence, an as-built drawing can be defined as an engineering drawing that informs any design change/deviation from the original design document. An as-built drawing is an engineering document that depicts each and every modification, field change, shop drawing change, pipe routing change, extra work, etc.

Preparing as-built drawings is one of the main processes of every construction project.

In this article, we will learn the importance of piping as-built drawings. Because of these red hand marks over the original design drawing sheet, as-built drawings are also known as red-line drawings. Those changes or modifications are marked on the original drawing with red colors to prepare as-built drawings. During actual plant construction, there may be many deviations from the original design drawings. As-built drawings are engineering drawings that depict the actual physical characteristics of a plant, building, or structure as it exists once the construction is complete.

Piping isometric drawing reading pdf