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Does update of title block require drawing rev. level change?

Does update of title block require drawing rev. level change?

(OP)
Hello all,

My company was bought out a few years ago, and it's been our practice to update the drawing title blocks to the new company name whenever a part is changed. According to our quality system, vendors have to re-certify the parts for the new rev level. This, of course, makes since when the part is being changed. Purchasing now want any drawing they send out for quote to have the correct company name. Not unreasonable. Our drafter is saying any change to the Drawing requires a ECN and drawing rev change, including changing the company name in the title block (rev change triggering a re-certification of the part). I hold that the revision numbers are Part revision numbers (our drawing numbers are the same as our part numbers), and if the Part isn't changing, the drawing doesn't require a revision change.

I believe there are standards out there than would cover this, but I don't have them. If someone who does have them (or could recommend perhaps a free MIL spec) could comment it would be much appreciated, and, of course, all other comments welcome as well.

Thanks!

RE: Does update of title block require drawing rev. level change?

There is no free MIL spec anymore regarding this topic, they have all been moved to the ASME Y14.x series of standards which you will have to pay for.

But to answer your question, you are right but not for the reason you are stating.
There is an allowance to "REDRAWN WITHOUT CHANGE" which allows you to update your title blocks and other formatting without rolling the rev. In the revision block, you will have 2 entries for the current revision. The first will be the existing change description and the second will be "REDRAWN WITHOUT CHANGE" and the date the redraw was performed and approved.

And by WITHOUT CHANGE, while you can move views, dimensions, and text around (including updating the title block), you cannot change any values, fix any typos, or make any other changes to the design.

--Scott
www.wertel.pro

RE: Does update of title block require drawing rev. level change?

(OP)
swertel, Thanks! Can you tell me which particular standard that can be found in? I have 14.5-2009, but I don't think that's it. Y14.35 maybe?

RE: Does update of title block require drawing rev. level change?

ASME Y14.100 actually has a relevant section at 6.5.2, 6.5.2.1 includes this sentence "The design activity identification of the new assignee shall be added to the first sheet of the drawing by revision action to identify the change in design responsibility." though the terminology of the section implies that this really is for govt contractors more than private industry but it's not explicitly stated. There's a bunch of other stuff there but in summary rather than replacing the title block with new 'design activity' they put a note above the drawing block with the new activity info.

I believe what Swertel is referencing is section 4.3.2 of ASME Y14.35M-1997 but based on what 14.100 says I'm not sure if changing the title block is a 'Redrawn Drawing Without Change'.

However, you don't necessarily have to blindly follow the standards - but if you do deviate don't then have a note saying 'drawing IAW Y14.100' or similar - unless you also give reference to your companies addendum or similar.

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