Yea, I know....this is going to be one hell of a debate.
If you read carefully, flow shouldn't be mistaken for actual PSI. That PSI spec you read is for resistance within the pump and rack cylinders....not base system pressure (about 150psi). There are "check valves"....but that's beside the point. PSI would be a stuck valve or counter reaction of the rack cylinders (resistance).
Honestly, you had my mouth shut for a minute....but I searched around and found that astonishing article. 1000+ psi is possible, but 1000+ psi flow is something else. Pressure is caused when there is no other possible method of "flow"...thus resulting in resistance (PSI). You're saying that your P/S line is constantly "pressurized", at 1300+ psi? Possible. But wouldn't a 1300+ psi "flow rate" seem more rational? Just means that the fluid should hypothetically flow at the rate of what an open ended 1300+ PSI system would produce...when one side of the sealed system was abruptly "cut" open....even though at no point that hose had 1300+ psi internally present.
Threadcounter, even if those specs were based off of the check valve closed....does it state on which side of the check valve those numbers were taken off of? 1000+ psi in a P/S pump....that's probable. 1000+psi in a rubber hose no, but 1000+psi fluid flow I can accept.
SRK, the tank system on the scuba gear may be capable of 4500psi, 3000 psi tank and 1500 psi hose...right? 3000psi tank I can believe, I mean those things are heavy as hell. 1500 psi Within the hose? Not to cause an arguement or anything but I honestly don't think that it's possible. To be reasonable....I'd say 3000psi in the tank and 1500psi Flow within the lines. 1500psi would blow your lungs out...not a good feeling huh? That's where the check valve would come into play.
If I'm wrong then I'm wrong. But I'm going put up a fight until then. I'm not going for a win or loss. We obviously have different opinions. I'm not saying that you're right or neither am I. I'm just here to understand the things that neither you nor I am aware of.
BTW, I love whiskey on the rocks.