Instruction Markings on Stainless Steel
Instruction Markings on Stainless Steel
(OP)
One of our construction vendors on-site was observed using plastic tapes on stainless steel vessels as instruction markings. Our site-inspection group stopped this practice due to fear of stress corrosion cracking. Now, the vendor is using cryons for making instruction markings. Are cryons good alternate or also posses risk of scc to stainless steel. Will appreciate inputs from colleagues.





RE: Instruction Markings on Stainless Steel
RE: Instruction Markings on Stainless Steel
We always used white chalk or black Sharpie.
Black Sharpie markers from Sanford are low in chlorides and other possible detrimental elements, but only black. Do not use colors.
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Rust never sleeps
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RE: Instruction Markings on Stainless Steel
RE: Instruction Markings on Stainless Steel
Thanks for your post and valuable feedback. A crevice corrosion taking place at the edge of paint is really something that would worth noticing while inspecting vessels and tanks. Could you kindly elaborate if it is a common observation or just a couple of isolated cases in your experience.
RE: Instruction Markings on Stainless Steel
The other case was on the exterior of a 304 unit near the coast. Ironically in this case the marking was related to the exterior coating that was going to be applied in order to protect it. In the couple of weeks before they go it coated they had pitting along some paint marks.
While paint markers usually go on very thin and stick well that is not always how it works. I suspect that these were related to locations where the paint went on thick and did not stick very well. After all you use special surface prep just to mark stuff.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm