The release dates of drawing revisions show when the new drawing version is official. Question: What is the release date for the Asme Standards?Īnswer: A release date is a date you officially release or publish the drawing. ASME revision control rules, though, forbid using revision 0 (zero) because it could be mistaken for an O (the letter). Question: Does revision designation (-) only apply to engineering drawings?Īnswer: Yes, though you can use revision "dash" for test plans and work instructions as well. Is it possible to change my engineering drawing without making a revision?Īnswer: The revision letter should change, and review the drawing for other key dimensions you're missing. Question: Suppose I have missed one dimension in the drawing but the basic design of the drawing is unchanged.
It also helps them recognize errors in the parts list or assembly instructions if those were not changed when the drawing was. The line through an item on the bill of materials with a note as to when it was eliminated actually helps when someone is reviewing an older version of the product or needs to retrofit it. Question: Is it a good practice to line through BOM items on an assembly drawing?Īnswer: Yes, it is a holdover from drawing board days. If they turn a car into a plane, it should be a new drawing number. Question: When an engineering drawing is revised to be completely different than the original by different engineers than the original drafter and checker, does that information in the title block change? Can the information in the title block ever be revised if it is unrepresentative of the revised work?Īnswer: If car name X is radically revised in revision B, they could create revision A with rev B and still call it the same car and drawing number. If changing one drawing changes everything that's associated with it, you would never stop churning out the updates. If 78901 rev A becomes rev B, the top level assembly needs to be updated to say if rev B is allowed on the parts list, but the related 23456 rev A stays rev A. Suppose the top level part is 1234567 rev A, and the child drawings are 23456 rev A and 78901 rev A. Question: If you have an assembly and need to revise a sub-component of the assembly for a typo on the drawing would that require the top assembly drawing do be revised as well? The change would not affect fit, form, or function of the top assembly.Īnswer: No. At least mention in the notes for revision D what changed so that those who see the new document know what has changed. In newer product data management systems, you can simply change the revision from C to D and note the changes that go with revision D while the system tracks all the changes associated with earlier revisions.
ANSI DRAWING AS BUILT DRAWING STANDARDS AND REVISIONS UPDATE
Question: If you have to update the drawing to a new revision, do you still leave the symbols of the old revision on the changes you made on the drawing and just add the new ones?Īnswer: You have to have a record of the changes to the document SOMEWHERE. You should include at least the last several revision letters, as far back as there may be drawings in circulation to explain what has changed over time. Question: Which short description should I use when dimensions are not modified, but just moved or relocated in a drawing?Īnswer: I've seen drawings that showed the last 10 revision letters with a short explanation of what it meant. Question: When a new revision is made, am I supposed to delete the old rev symbols? Say it’s rev C and I still have the rev a & b symbols on the drawing to show where the changes were made?Īnswer: It is fine to leave several prior revisions along with the associated changes on the drawing so that people holding an older product know what it means. Then it could be filled in as part of a later version of the BOM. You can avoid confusion for the reader by listing item 3 and having an obvious place holder dash in the BOM. You could have item 1, item 2, and item 4. Question: Do the revised standards of engineer drawings allow skipping item numbers in a bill of material?Īnswer: Yes.
Long answer: all document pages should refer to the same revision letter and version number so that people who are looking at a set of drawings know that they belong together. Question: If I have a multi-page page document and rev sheet 1 and 4, do I update rev of all?Īnswer: Short answer: yes, at least the title block.