Got a pipe alignment wrong by a quarter inch and it cost me four hours of grinding

I was working on a feedwater heater bundle down at the Marathon refinery in Gary last Tuesday. The print said the nozzle sat at exactly 8.75 inches off the centerline, but I misread my tape and cut the saddle at 8.5 instead. That tiny mistake meant the whole flange sat crooked and wouldnt seal no matter how many shims I tried. I ended up having to grind down the weld prep and recut the whole damn thing with a bevel, which took me from 10 AM straight through to 2 PM. My foreman just stared at me and said "you owe me a lunch break." Has anyone else had a simple measurement error turn into a full day disaster?

2 comments

2 Comments

johns182d ago

Did you ever find a trick to catch those before cutting?

margaret_bennett32d ago

The Marathon refinery in Gary? I swear that place has its own gravity field that messes with measurements. I once saw a guy there lose half a shift because he read the decimal wrong on a thermocouple placement, ended up welding a support bracket into a spot that made the whole bundle shift by a sixteenth. Four hours on a quarter inch mistake though, that’s brutal. Your foreman sounds like he’s been around the block, probably seen worse - I bet he has a story about a boiler tube that cost a whole weekend.