When I had my PST HP100 hydro'd I picked it up from the hydrotester empty with the valve finger-tight. There was a bit of flash rust in there (was actually there before hydro) but otherwise the tank was clean. I don't think you have to be a rocket scientist to check if your tank is clean inside and rinse it out if it is not. When I brought the tank for a vip and fill the shop employee popped the valve off, looked inside and stated " it's got a bit of flash rust but that's fine", spun the valve back on and stickered it. If that was the way the vip was done with the customer (me) standing right there, I'm pretty sure the vip's they do when getting the tanks back they send out for hydro aren't any more thorough.
I suspect that the answer to this question from the OP is "No". That being the case, I can't think of any reason why a tank that is less that 12 months past it's last hydro should need another vip. I see some comments about another vip being necessary to check for cleanliness but AFAIK checking a tank for cleanliness doesn't require a PSI or similarly certified inspector. Is having a dirty tank even grounds for failing a vip? I thought the whole reason for a vip is to inspect the tank for defects that would compromise it's structural integrity and the hydrotester just did that.
Is this inspection any less comprehensive than the one the shop requires to slap on a vip sticker?
I suspect that the answer to this question from the OP is "No". That being the case, I can't think of any reason why a tank that is less that 12 months past it's last hydro should need another vip. I see some comments about another vip being necessary to check for cleanliness but AFAIK checking a tank for cleanliness doesn't require a PSI or similarly certified inspector. Is having a dirty tank even grounds for failing a vip? I thought the whole reason for a vip is to inspect the tank for defects that would compromise it's structural integrity and the hydrotester just did that.