Dave demos the "line development" technique to make a template to join pipes with a "y" saddle. All you need is 1/8" line graph paper, a ruler, drawing compass and a bit of practice!!!
Thanks, exactly what I was looking for. I want to make a rocket stove using round pipe. I remember doing similar drawings when I was in high school a long long time ago but couldn't remember how to set it up. I didn't understand why you were using the inside diameter at first but then I figured out that it must be because its the inside diameter that contacts the other pipe
Lost in space at 13 minutes. I can relate to that. We have contractors who think outside the box and then you have what we call in Australia he cowboys. Well, I'd say 90percent of construction is cowboys. Great video thanks for spending your time doing this.
Thank you so much for this tutorial, very well explained. Do you know if any significant changes are needed for making a sheet metal "Y" I'm thinking for dust collector piping.
At a little over 5 minutes you mentioned you don't have to have advanced degrees in trigonometry to do this. That makes me think about the Giza pyramid built some 12,000 years ago or more. Architects and engineers still use the concept for their designs and mentioned they would be happy if their work was half as good. Certainly the level of accuracy in the megalithic structures goes beyond what we are able to achieve today. I'm in awe. Recently the British took some high level equipment to Egypt. They had ultrasonic instruments that could record what is underground also measure for straightness on each level of 60 tonne limestone blocks laid. What they found out was there was only a slight deviation from one end to the other. What they did fail to mentioned was the deviation was to the same scale in relation to the curvature of the earth. Let that sink in for a little. I just don't know why the conformed narration wants to keep this from the public.
Sir please upload video of pipe to fastrum of cone with an inclination agle of 45deg. Also please provide development /flat pattern of cone with hole pattern and how to marking in a plate.
Please upload video of a branch pipe intersecting a fastrum of cone with an inclination angle 45degree. Also provide flat pattern of fastrum of cone with hole marking for branch pipe in a plate. Please upload as soon as possible sir
Good question! This technique is used on sheetmetal as well as pipe. If we use the O.D. for a layout, there will be a lot of grinding of pipe wall to feather the surfaces to meet. Usually on pipe with any substantial wall thickness, a perpendicular cut using the I.D. will leave the edges of the wall exposed for a full penetration weld with minimal grinding needed for a good fit up- For sheet metal, theres no need for and O.D. vs. I.D.. Dave
Yeah I've done sheet metal and insulation work for years and the last few years i got to apply the layouts for big pipe fittings. Some of the pipe had 3/4 wall thickness and with using the ID for the layout the long point would be a lot shorter. I actually made an OD and ID patterns to help with getting the right bevel. This was on a 30 degree miter. With that much wall thickness just an ID would have left too much of s gap.
really enjoyed your video and I appreciate the time you spend on making thus video. But i keep wandering, does this technique also work when the 3 inch pipe is off centre ?
Hi Dave,I love your account and appreciate the time you put into it.i could do with knowing how to make a template for a hole that is off set on a vessel say a 6" connection to a 32" body but off centre.be great if you could show that sometime soon.cant find a video on here about that.many thanks
+Dave Osland yes I do mean that Dave but it's not a nossel that has the be shaped and sat on,it's an actual pipe that goes through the body.can look at programs or apps to help,thanks for reply dave
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Just keep playing it thru it'll come to you. I've done sheetmetal layout for 29 years and most of the intricate layouts i would eyeball and mostly ended up close as hell. But after watching this guys videos its like a flood gate off utter duhhhh opened up! I can't believe how simple all these layouts actually are! Keep in mind he says 2-D a few times before the 7:43 mark. Watch his hands as he calls out each set of marks. Good luck brother!
really enjoyed your video and I appreciate the time you spend on making thus video. But i keep wandering, does this technique also work when the 3 inch pipe is off centre ?
+yaishk Nope! For an offset connection I go high tech and use a program like "pipe fitter" to layout the connections. The template for those are weird looking, asymmetrical. Luckily, that type of connection is rare.
