Argon Tank Date Stamp Question

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I thought I knew how to read these, but I guess I don't. When was this tank tested?


Reply:Looks like April 2021.DaveWelditU.comLincoln Weld-Pak 140HDHobart Handler 140
Reply:When go fill tank they tell the date. Most tanks need to be tested every 5 years. Some new tanks well 10 years. DaveFYI the marks after the date [+*] is 10 years test date and over fill by 10%https://welditmyself.com/gas-cylinder-date-stamp/#12-would-you-like-to-see-an-argon-tank-date-stamp-example

Originally Posted by Wolfman

I thought I knew how to read these, but I guess I don't. When was this tank tested?


Reply:+ sign followed by a star sign means test is good for 10 years. Most customer owned cylinders only get the +.  I did a fair amount of hydrotesting back in the mid 80'sThermal Arc 320SP ( Lorch )Cobra PythonsThermal Arc 300 AC/DC  ( Sanrex )ESAB 301i AC/DC  ( Lorch )Thermal Arc 161STL  ( WTL )Thermal Arc 190S  ( Sanrex )Cut Master 82, 42. Cut45 ( WTL )Victor Gas Apps.Boxes and boxes of welding crap.
Reply:

Originally Posted by smithdoor

FYI the marks after the date [+*] is 10 years test date and over fill by 10%
Reply:Doh! IA18 is the stamp of a specific independent tester. Confusion over!
Reply:i got one the same, but follwed by a '14 instead of '21, and i'm 1500 mi from u, so maybe tester and manufacturer, i think it was it's first stamp.
Reply:

Originally Posted by Rondo

+ sign followed by a star sign means test is good for 10 years. Most customer owned cylinders only get the +.  I did a fair amount of hydrotesting back in the mid 80's
Reply:Interesting post, thanks for the replies, Australia is probably different thoughSent from my 5007U using Tapatalk