pat360•17d ago

Old blueprint standards just cost me a redo on a commercial job

I used the 2017 ASME Y14.5 standard on a piping set like I always have, then the senior engineer flagged it because the client now requires the 2023 revision with all the new datum feature notation. The whole first floor plan got sent back for changes that took me an extra 12 hours to fix. Has anyone else's shop updated to the new standard yet, or are you still holding out?

2 comments

2 Comments

ross.william16d ago

Is it REALLY that big of a deal though? I mean, we're talking about moving some datum triangles around and changing how you call out a few features. The pipe still goes in the same hole at the end of the day. I looked at the 2023 standard and honestly half of the changes feel like the committee just needed to justify their paychecks. Your senior engineer probably just wanted to flex on the client requirement to look important.

the_amy16d ago

@ross.william I get where you're coming from with the pipe still fitting, but the datum changes and feature callouts are actually a bigger deal than they look. The 2023 standard cleaned up a lot of confusing rules that used to cause arguments between design and manufacturing, so it's not just busy work. The way datums are set up now can really change how a part is inspected, and that can save money on the floor by cutting down on misinterpretations. I've seen people fight over these details in real projects, and it's usually because the old rules left too much room for different readings. So maybe your senior engineer had a point about following the latest version, even if it seems like a flex.