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Surface Finish examples

Surface Finish examples

Surface Finish examples

(OP)
A fab shop questioned the surface finish callout on a drawing one of our other engineers sent them before vanishing into thin air.  No body else is around so I tried to field the estimator questions.  Where can I find examples of what different stainless finishes actually look like?  What are the standards organizations for such?

I don't need flatness or such,   just something better then "shiny" or "less shiny"

Thanks
Eric

RE: Surface Finish examples

You can go to a supplier of surface roughness devices and they have ref. standards.
Or, if you any old time stainless salesmen they may still have a collection of surface finish samples.

The real question is what is being required?  It needs to be a measurable such as Ra.  Anything else is bogus and should be rejected unless they are also defining how to measure it.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: Surface Finish examples

(OP)
The part is 304 plate with tubing welded to it.  It's a chase for plumbing to pass through a bulkhead.

What I want is no color distortion from the welds, and the weld area to look semi flat, with a grain that is uniform around the part.  A finish similar to stainless steel hinges or large Stainless bolts.

These are polished finishes, not end milled, if it matters to the nomenclature.

RE: Surface Finish examples

You can find weld color and surface info in AWS documents.  This is a big deal for sanitary service applications.
There are limits on weld concavity and roughness (wavyness) too.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

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