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I was torching tube sheets way too hot for 2 years, a guy on a job in Gary asked if I was preheating beer cans
I always figured more heat meant faster rolls and better fusion, so I kept the flame cranked wide open on every 2 inch tube I set. Last Thursday an old hand on a boiler job in Gary watched me for maybe 30 seconds, told me my flame was 300 degrees over what the tube sheet wanted, and I could see the rippling he was talking about. How do you all judge your preheat, do you go by color on the metal or do you keep a temp stick in your pouch?
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rowanlewis6d ago
Beer cans, that's a good one. My first year I was doing the same thing, figured the puddle told me everything and it did, told me I was cooking the sheet. A temp stick in the pouch is the way to go, no guessing about it. Color lies to you under shop lights, especially with a rosebud throwing that orange glow back at you. Crayon melts at its number and you know right where you stand, takes two seconds. Cheap insurance compared to reaming out a warped sheet.
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