To fusion butt weld the pipes together you need nice perpendicular cut pipe to butt together with absoltly no gap anywhere arounf the weld joint. Where I work we have a specialized tool for this it's called the George Fitzgerald.
I'm pretty sure I will never own one because they are about $7,000 for a used one and the cheap knockoffs are around half that.
Any pipe I buy from the scrap yard I can take to work and square up the ends on the GF+ machine.
This is going to take a lot of argon.
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