Method for preparing as-built drawings of pressure vessels

Thread Content

This post was last edited by chun_ing on 2012-3-29 at 18:12. How is it possible to prepare the as-built drawings for pressure vessels? Neither the tolerance specifications nor 150 provide a clear method; they only give a general idea. I have a few questions: 1. According to the documents, \"as-built drawings should accurately reflect the actual condition of the product; any items that do not match the blueprints as per the inspections should be clearly marked or modified.\" If everything needs to be modified, then the amount of data involved will be quite large. For example, if the drawing indicates a pipe outlet height of 155, but the actual measurement is 154, does this also need to be corrected in the as-built drawings? 2. Our company’s as-built drawing stamp has two fields: “Revision” and “Review”. Who signs for the revisions, and who signs for the review? 3. As stated in Article 1, if all the inspection dimensions are modified on the blueprint, it will likely become quite messy; therefore, it is necessary to redraw the as-built drawings ； If it is necessary to redraw the as-built drawings, how should the title block be filled out? For example: Who should sign for design, drawing review, and approval? Also, who is supposed to draw the as-built drawings? Is it the inspector who designs the as-built drawings, or is it the design firm that creates them? If it is the inspector who draws it, then are the review and approval fields to be signed by the design institute? Another question is: how should the dates of design, review, and approval be written? Should it be the original blueprint date or the actual date? 4. If the as-built drawings are redrawn, how should the as-built stamp be filled in on the drawings? “Are the signatures on \"Modify\" and the \"Design\" in the redrawn blueprint from the same person?