Welding Tips and Tricks

I have a bit of a dilemma and I have been asking around about solutions. I am hoping that perhaps there are a few pipefitters in here with the ability to assist me. I need to join two smaller diameter pipes to the side of a third larger diameter one. The pipes are on the center line of the larger one and fit in at different angles. I'm not a pipefitter, but normally this wouldnt be a problem for me to make the right cuts and just weld it up. The problem here is that the two pipes on the side join up very close to eachother. There will be interference between the two. I need to make cuts on the smaller pipes so that they properly mate with eachother as well as the large pipe. I have been looking around to find how to make the calculations for these cuts and have come up dry. I have attached an image for reference. The section in question is circled in red and the cuts I need to make are in blue. Thank you to anyone who has any advice. I appreciate it.

Easy preasy. Get one of the free on-line mitre template applications going.
The bottom vertical pipe you don't have to mitre at all if you don't have to (you don't say what it's for).
The pipe next to it mark out two templates: 57 degree template one side and 33 degree template the other.

I agree. The bottom vertical just needs a standard 90° fish-mouth cope, and the one coming in at an angle can have the two mitres on it. However, if you have all the sizes (OD & wall thickness) I can generate a single cut wrapper for the angled pipe using my Bendtech 7x program. You can slice it in one-go using a torch of your choice.

guess he figured it out.