Tank Identification

[jdcpa]

I have been given an aluminum tank that reads OTO DOT-3AL 3000W with S(5?)6210 and 9/88 as the date.

Is this one of the old 6351 alloy tanks or is it something else.

Thanks in advance.

 

[mike_s]

If your tank original hydro was in 9/88, you're ok. see below


from http://www.luxfercylinders.com/news/releases/20021209.shtml

To determine whether your Luxfer scuba tank is made from 6351 aluminum alloy, check the original hydrostatic test date (the earliest date) stamped on the crown. (Look for a month/year combination, such as 3/75.) If the stamped year is 1972 through 1987, the tank is made from 6351 alloy. A limited number of Luxfer scuba tanks were also made from 6351 alloy during the first half of 1988. If you have a 1988 tank with an original hydrostatic test date of 6/88 or earlier, Luxfer will assume that it is a 6351-alloy tank and issue an RG number. Tanks with an original hydrostatic test date of 7/88 or later are made from 6061 alloy and are not eligible for the trade-in program (Note the trade in program has ended)


also see Sustained-load Cracking FAQ http://www.luxfercylinders.com/support/faq/sustainedloadcracking.shtml