I need some input on pipe dent removal. I've done it before with banshee pipes & had good luck, but the big bore pipe's tend to spit out my end plugs, due to larger area more pounds per sq".I'll have to revise them for sure, I'm thinking of lathing a barbed edge in the plug to the to help hold the hose on the plug. Makes you about crap your pant when they POP free.
What I do is use regulated compressed shop air, 40-60psi, & then put a mild torch flame to the dent & heat till it comes back out. The problem is as you heat the pipe the air in it expands increasing the air pressure in the pipe, which in turn makes me severely nervous of the metal blowing up in my face before the plugs spit out. The cpi I just dented is extra thick compounding my concern as I know the pressure is going to have to be higher to relieve the dent.
Basically what I need to know is, is my technique sound, how much pressure till the pipe blows through, how much pressure are other guys using. I realize I'm probably over thinking this but when you have 80-100psi under cherry red metal that your staring at...
Thanks for any input