Welcome to the Cave Diver's Forum - Cave Diving Resource.
Quoting from PST Technical Bulletin D-100E, "PST high-pressure (3442 psi) cylinders must be retested in accordance with DOT –E9791 or TC-SU4349-230 and have special test requirements based on their design and the DOT/TC requirements. This bulletin provides the necessary information."
Originally Posted by Slüdge
Those are PST's exact words, specifially for the 3442 cylinders, "high-pressure." It's also their words for 3500 cylinders as below.
Also, quoting from PST Technical Bulletin D-100, "PST high pressure (3,500 psi.) cylinders must be retested in accordance with DOT-E9791 or TC-SU4349 and have special test requirements based on their design and the DOT/TC requirements. This bulletin provides the necessary information."
Are you arguing that PST's use of "HP" and "high-pressure" are different things altogether? PST seems to think they're the same thing in both documents for both cylinders.
The old PST Spec sheet also shows 3442 cylinders as E-Series with the corresponding old part "HP" numbers. As you correctly pointed out earlier, the marking 3442 instead of 3500 had to do with yolk valves.
Last edited by diveongas; 05-21-2012 at 05:42 PM.
In the interests of continuing exactness, it pays to know that 3500 cylinders use the "smaller" 7/8 thread while the 3442 cylinders (called E Series just to highlight this difference) use the "larger" 3/4 thread, as implied above with yolk valves discussion.
By AB8CD in forum Main Forum
Last Post: 05-30-2010, 08:38 PM
By stairman in forum Sidemount Forum
Last Post: 11-08-2009, 05:40 AM
By stairman in forum Main Forum
Last Post: 08-16-2009, 07:07 PM
By aainslie in forum Main Forum
Last Post: 04-29-2008, 11:45 PM