My first Tanks

Hi All.

Just purchased my first set of tanks (Worthington X7-120)'s Steels, rated at 230bar/3442psi
as part of my new RAS setup (also purchased an AL30 Pony). They came from the LDS
charged at 3500 PSI. But upon filling at Dutch, the gas blender indicated he would fill them
to 4000 PSI and they'd cool down to 3500 PSI or thereabouts (actually, there down to 3100 PSI
now so perhaps I got rooked for a high pressure fill).

Question being, for a steel 120 rated at 230bar/3442 PSI, is there any margin for "overfilling"
and what would be the max to which it could be filled without any danger to the tank or the
1st stage (which in the case of my 2 regs, are rated to 3500PSI each as well)?

2nd Question - The LDS recommended converting the regs to DIN for these tanks but I hear from
other shops that it is not necessary. Thoughts?


BTW, doing much better on buoyancy. THe steel 120's actually help.



____________________________________________
Regards,

Arnold