Drawing Standards
Drawing Standards
(OP)
What is the aerospace industry standard for drawing revisions? Rev A or Rev 1. I prefer A. If possible, please weigh in with what's used and the company name. I want to present this info to our chief engineer.
Thanks,
Roger
Thanks,
Roger





RE: Drawing Standards
If there is a standard, then it is pretty well ignored!
RE: Drawing Standards
The industry standard is "letter" revisions, IE:
basic drawing number, Rev X
NOT
basic drawing number, Rev 24 [or is that a -24 part number????]
NOTE: ASME Y14.100 is the "DOD authority" for engineering drawing standardization. This Spec references ASME Y14.35 "Revision of engineering and associated documents" ... which identifies LETTER REVISIONS as the DOD standard.
NOTE: some companies have letter Revs, combined with sub-numbers, to indicate distinct features within each revision, IE:
Rev C [contains]
Rev C1 - Finish Rev
Rev C2 - XXX fastener Rev
Rev C3 - Bearing Rev
etc...
Regards, Wil Taylor
RE: Drawing Standards
In general, if your product is supplied as a vendor item (i.e supplied under your own part number) to your final customer, you can go either way. If, on the other hand, your drawing numbering is to be based on that of your customer, you will probably be forced to follow his rules.
The main thing is that whatever form of revision control is chosen, it must be consistent enough to allow for full traceability of part usage - all aerospace regulatory bodies (and many other industries) now require this as a matter of course; so you should be able to identify what issue of part is used on what issue of assembly and what customer(s) these have been supplied to.
Rikman
RE: Drawing Standards
Pre-production drawings are normally given a "number" issue until the samples/prototypes/etc. have been cleared and accepted for manufacture.
However, most companies do not strictly adhere to this formula and may use alternative systems, especially on older drawings.
These inconsistencies should disappear, hopefully, as more manufacturers conform to international standards (e.g. ISO EN 9000, QS9000, etc.) which mandate that a formal revision control system be adopted.
In short, as long as you decide to use one method of revision control for your designs - and stick to it - you can't go far wrong.
Johnh
RE: Drawing Standards
Some association out there should have the fortitude to generate an all-inclusive standard and to make it availabe without a charge, to the benefit of the entire Engineering community. While some of the ISO mandates make sense, such as a controlled revision process, these standards themselves are convoluted as well and are only for the benefit of starting a "quality bureaucracy"
RE: Drawing Standards
Bryan Swinney
blswinney7@mac.com
[(3*4)^2]*10^3=144000