The other alternative is to use dripperline. It is more costly, but you can make circles out of it.
As to a pressure regulator, yes... you will need one. T-Tape is intended to operate at 10psi.
You might consider using 15 mil T-Tape. It is their heaviest and should last you a few years. The most popular spacing for the crops you've listed is 12".
Let us know if you have any more questions.
: What is the minimum radius the 515-08-670 or
: the 510 can be turned 180 degrees? My well
: pressure is set near 55 psi. Do I need the
: Senninger PRV? I have a variety of things
: to water, strawberry beds 8-50 rows @ 4'
: o.c., intensive beds of produce 4' wide
: (4'x12' connected by 3'x4' then 4'x12
: connected by 3 x 4...), raspberries in 50'
: rows and aspargus in 100' rows. I am
: wondering if I can cicle around up to
: 900'runs? Thank you