NJ Scuba Divers Message Board
[ Post a Response | NJ Scuba Divers Message Board ]
Re: Questions for the all knowing
Posted by njdiver on 10/12/2015, 10:19 pm, in reply to "Questions for the all knowing"
Surplus Air with A Plus
Each 3AA steel cylinder receives an initial hydrostatic test to 5/3 service pressure. That test is documented on the cylinder crown by imprinting the month, year and tester's mark. New cylinder testers use a brand mark, while North American retester's must have a registered mark consisting of a letter and 3 numbers. When a new original test brand mark on a 3AA cylinder is followed by a plus mark (+), the cylinder is eligible for an additional pressure 10% in excess of the marked service pressure. A 2250 psig cylinder with plus (+) may be filled for the valid period of that test to 2475 psig.
Hydrostatic retester's are also authorized to retest a plus marked cylinder to determine whether the wall elastic expansion is low enough to retain the 110% fill. Most retester's choose not to get involved. Some facilities are unwilling to expend the extra effort or don't understand the process, so the steel cylinder owners seldom see a plus (+) after the original test. Since the plus mark is only valid for the duration of the hydro test, unless renewed along with the next retest, the cylinder must not be surplus filled. A hydro retest may, at any time, re-certify an eligible cylinder if he follows the prescribed protocol. http://atlanticwreckdivers.net/Cylinders.htm
Disclaimer of Liability: The materials on the NJ Scuba Divers Message Board web site are provided to you free of charge, "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL NJ SCUBA DIVERS MESSAGE BOARD OR BOARDHOST.COM BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING SPECIAL, INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES OR DAMAGES FOR LOSS OF PROFITS, REVENUE, USE, OR DATA WHETHER BROUGHT IN CONTRACT OR TORT, ARISING OUT OF OR CONNECTED WITH ANY NJ SCUBA DIVERS MESSAGE BOARD POST OR BOARDHOST.COM WEB SITE OR THE USE, RELIANCE UPON OR PERFORMANCE OF ANY MATERIAL CONTAINED IN OR ACCESSED FROM ANY NJ SCUBA DIVERS MESSAGE BOARD POST OR BOARDHOST.COM WEB SITE.
-------------------------------------------------------Link Disclaimer: We provide links to web sites operated by other parties. The links are provided for your convenience only. The presence of a link does not imply any endorsement of the material on the web sites or any association with the web site's operators. We do not operate, control or endorse any information, products or services provided by third parties through the Internet. We are not responsible for the content and performance of these sites. Use of linked sites is strictly at your own risk including any risks associated with destructive viruses.
If you like this website, and would like to give something in return, you can make a donation
Your donation will be used to pay for domain & maintenance costs ONLY!
Click the PayPal Donate button below....THANK YOU!