TIL that a single boiler tube can handle over 1,200 psi before failing.

I was reading an old maintenance manual from a 1970s power plant and it listed the burst pressure for a standard 2-inch tube. I always figured they were tough, but that number really surprised me. How often do you guys actually test tubes to anywhere near that limit in the field?

2 comments

2 Comments

jade_lane5d ago

My uncle worked at a paper mill and said they'd hydro test sections to maybe 500 psi, but only after a full clean-out.

hugowells6d ago

What gets me is the gap between that burst number and the actual working pressure. I saw a spec sheet for a boiler retrofit last year where the normal operating pressure was only 300 psi. They design that huge safety margin for a reason, like when scale builds up and creates a hot spot. That tube might hold 1200 psi when it's perfect and cold, but real world heat and corrosion change the game completely.