Today i managed to get through the next 3 bends but got through quite a bit of copper pipe. I seemed to have problems with the passover dimensions as there needed to be a 15mm clearance under the passovers which i couldnt seem to manage.
The afternoon session consisted again of theory and health and safety but we also had to watch and answer questions about a video on the dreaded "ASBESTOS".
We then were given a lesson in how to work out "x dimensions" which was how to accurately work out the the distance between the width of an elbow minus the depth of the joint seating.
E.g If you have two elbows which need to be 300mm apart, how long should the piece of adjoining pipe be to join them?
Its a simple calculation, but its difficult to explain without a diagram.
Essentially the x-dimentions in the above joints are dinemsions E and G which are unknowns.
You are give dimension D and the depth of the elbow and you deduct this measurement from the 300mm adjoining pipe length.
If D is 40mm and the depth of the elbow is 15mm then the x dimension (E in diag above) is 40 - 15 = 25mm, so if the distance between the midpoints of a left and a right elbow is 300mm, then the pipe length needs to be 300 - (2x25) = 250mm.
The afternoon task was to work out the x dimensions for several fittings and then calculate the lengths of pipe required.
Apparently this method is not used to calculate pipe lengths and is generally only a method of pipe layout design.
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