c/boilermakers

Had a flange weld crack on a 500 psi boiler in Toledo last winter

I was doing a final pressure test on a new install when I heard a sharp hiss and saw steam coming from the main steam outlet. We had to shut down, drain the whole system, and re-weld the joint in freezing temps. What's your go-to method for checking for hidden cracks before a pressure test?

Shoutout to the old guy in the yard who warned me about cheap boiler tubes

I ignored him and blew a whole Saturday plus $400 on a set that cracked under pressure after a month. Anyone know a decent supplier in the Midwest that won't sell you junk?

Pro tip: don't buy those cheap magnetic levels for boiler plate layout

I grabbed a set of three for like $25 online thinking they'd be fine for quick checks. The magnets were so weak they'd slide right off a vertical surface if you breathed on it. Wasted a whole morning re-marking a water tube sheet because my lines kept drifting. What do you guys use that actually stays put?

Hot take: Using a proper bevel prep machine versus a hand grinder for heavy plate

We had to weld up some 2-inch thick pressure vessel sections last month, and the time difference was crazy. The machine gave us a perfect 37.5 degree edge every time, while the hand work was all over the place and took three times as long. Anyone else made that switch and seen a big jump in fit-up speed?

A foreman in St. Louis called me out on my weld prep last month

He walked over and said, 'Your bevel angle is too steep, you're losing penetration before you even strike an arc.' I was cutting a 37.5 degree bevel on some 2-inch plate for a pressure vessel. I switched to a 22.5 degree angle on my next piece and the difference in the root pass was night and day, way cleaner tie-in. Anyone else have a simple tip that fixed a weld issue you didn't even know you had?

The week we had to weld a 3/4 inch thick patch on a boiler in St. Louis with a bad backer rod.

We were under a tight deadline and the old backer rod material kept melting out before we could get a good root pass. My partner suggested we try a ceramic fiber rope instead, and it held up perfectly to the heat. Has anyone else found a better backer for thick plate in a high-heat repair?

Spent 6 hours chasing a leak on a 3-inch steam line flange

I was replacing a gasket on a 3-inch steam line flange at the old paper mill downtown. The new gasket kept weeping after I torqued it down, even after I cleaned the faces three times. Turns out the flange face had a tiny, almost invisible gouge from a previous repair. I had to pull it all apart again and use a thicker, softer gasket material to seal it. Anyone have a good trick for spotting damaged flange faces before you start the job?

My old foreman changed my mind about pre-heating thick plate

I was rushing a job in Gary last month and he said, 'You're not saving time, you're making a cold crack's vacation home.' That stuck with me because we found a tiny flaw later that week. Anyone else have a simple rule that saved your butt?

My foreman said to always double-check the gasket on a new flange, even if it's factory sealed.

I didn't listen on a job in Toledo last month and we had a steam leak that shut down the line for three hours. Anyone else have a simple rule they ignored and paid for it?

That moment when the 3/4 inch plate on the Lake Erie tank job just would not line up

We were doing a repair on a big water tank near Cleveland, and the new section of 3/4 inch plate was off by a full inch at the bottom seam. My foreman, Mike, just kept yelling to pull it with the come-along, but the steel was fighting us hard. Ended up having to cut a small relief notch we didn't plan for, which added two hours to the weld prep. Anyone else had a plate fight them that bad on a seemingly simple patch?

Spent 4 hours trying to get a flange to seat on a boiler in an old Pittsburgh mill

The gasket kept binding on one side no matter how we torqued the bolts. Turns out the mounting surface had a tiny, maybe 1/16 inch, burr from a past repair that we couldn't see. Had to file it flat by hand before it would finally seal. Anyone have a faster way to check for that kind of surface flaw?

Talked to an old timer at the Pittsburgh plant about pre-heat temps

He said 'kid, if you're not hitting at least 250 degrees on that P91 weld, you're just asking for cracks.' I've been going by the book at 200 for years. It made me stop and think about all the 'book smart' stuff we learn versus the real world. Anyone else have a specific temp they swear by for high-chrome alloys?

I finally toured the old power plant in Gary, Indiana last week and everyone seems to think the original riveted seams are just for show.

I measured the plate thickness on a 1928 boiler and the riveting is still holding better than some modern welds I've seen fail after a decade, so why is the default always to cut it all out?

Spent 3 days trying to seat a gasket on a 1978 boiler that should've taken an hour. The old flange was warped just enough to be a nightmare.

The amount of guys who skip the pre-heat on a 2-inch thick plate weld is wild

I was on a job in Pittsburgh last month, and I watched a crew try to weld a 2-inch thick carbon steel plate without any pre-heat. They just started laying beads. I could hear the cracking from twenty feet away. They spent the next three days grinding out cracks and re-welding, which blew the whole schedule. It's basic stuff, but it matters because that thermal shock creates hydrogen cracks that you can't always see. I learned this the hard way on a pressure vessel repair five years ago when a weld failed hydro. Now I always check the WPS and break out the rosebud torch if it calls for it. Has anyone else had to step in and stop a crew from making this same mistake?

Question about a weird noise from a boiler in a Philly apartment building

Heard a sound like a goose honking from a unit's radiator, turned out a kid had shoved a toy whistle into the air vent. Anyone ever find something wild stuck in a system?

Overheard a journeyman in Toledo call a 3/8-inch gap 'close enough' for a gasket

That's how you get a call back at 2 AM for a steam leak. Has anyone else had to fix a 'close enough' job from another crew?

Showerthought: Remember when we used to hand-draft everything on the shop floor?

Honestly, I was welding a new section of a boiler drum in a Pittsburgh plant about ten years ago, and my old paper template for a manway flange got soaked with cutting oil and tore. Tbh, I had to freehand the cut lines with soapstone and a lot of guesswork, which added like three hours to the job. Ngl, does anyone still keep a roll of that old brown drafting paper around, or is it all CAD prints now?

Changed my mind about pre-heating after a job in Cincinnati

Always thought letting a boiler cool completely before a weld was fine. Saw a massive stress crack form right in front of me on a cold start at the Miller plant. Anyone else run into this?

Honestly thought those new ceramic fiber blankets were just overpriced hype until I used one on a 12-inch steam line repair in Toledo last winter.

I picked a 3/8 wall tube over schedule 40 for a high-pressure steam line repair

The extra thickness cost more upfront, but it handled the 250 PSI surge last week without a single issue. Anyone else had to make a call like that on a tight budget?

Unpopular opinion: I think the new weld test rules are making things worse

I saw a big change in our shop's pass rate over the last year. We went from about 90% of guys passing their 6G pipe test on the first try down to maybe 60%. The main cause is the new rule from the hall that says you have to use a specific brand of low-hydrogen rod for the test, even on carbon steel. It's a lot less forgiving if your arc gets a little long. I've watched three good hands fail in the last month because of it. Has your local seen a drop in test passes since they changed the rod spec?

Just welded my 1,000th linear foot of 4-inch schedule 80 pipe this quarter. That's a LOT of rod.

Had a flange weld fail on a boiler at the old Miller plant in Akron

It was a 3 inch steam line, pressure was only at 150 psi. The root pass looked good but the cap cracked after a week. Now I always pre-heat past 250 degrees on any flange over 2 inches, no matter what the spec sheet says. Anyone else run into this with older carbon steel?

Appreciation post: My old foreman told me to always double-check the fit-up before the root pass

Back in 2008 on a big tank job in Toledo, he said 'Pat, your eyes are the best gauge you got, trust them over the tack welds.' I thought he was just being extra careful, but a few months later I rushed a fit on some 2-inch thick plate and the whole joint pulled apart after the first bead. Cost us half a day to cut it out and start over. Anyone else have a simple piece of advice that saved your hide later on?