How do you use the lines "unsleeved"? doesn't that make them weaker at the knot.
The answers already given fully cover your query and remember that if you are using short lines it would usually be in low wind conditions where the pull on the lines is reduced !
Assume that you are using 90lb LPG unsleeved, rate it at 50% for any knots and or damage and that still gives a breaking strain of 45lbs which is still one hell of a load on EACH line !
I recently snagged a line, 120ft,90lb LPG, on a jacket zip and it was so badly frayed that I had to cut the damaged length a couple of feet from the end.
I then added a spare length of LPG joining the ends with a bloodknot, see image, and then match the other lines.
I fly using these lines on a vented Rev in 20mph winds, no problem !