Dynamic pipe offsets
This applet shows how to mathematically construct a pipe offset, a common construction in plumbing and pipe fitting. In most situations, the (off)set and the fitting angle are supplied. Then the calculation of the travel and run follow from simple trigonometry (try it!). The take-out (aka take-off) is known for any standard fitting, so the cut length and the face-to-face length can also be found (also try this!). Sometimes, an offset needs to be constructed using given pipe diameter, set (center-to-center) and face-to-face measurements. This is a lot more difficult. This applet calculates the fitting angle, the run, the travel, the take out and the cut length of the piping.
- Quantitatively, how are the "naive" angle and fitting angle related? Are they ever the same?
- What is the relationship between the take-out, the travel and the cut length?
- How are the take-out and the fitting angle related? (Requires basic trigonometry.)
- Given face-to-face, set and pipe diameter, what is the formula for the take-out? (Requires advanced trigonometry.)