Yeah IMO the biggest drawback of bellows expansion joints are:
1) People forget you can't just throw them in. Supports etc have to be reviewed
2) A lot of places forget to put them on a maintenance/replacement schedule or ignore it and just let them eat. Eventually they fail
Sounds like a mix of potentially sub-optimal piping design and expansion joint failure due to extended life time.
I would hope the system has normal slope and drain spacing otherwise you'd be experiencing a lot more hammer events like TBP described. Accelerating slugs of condensate to ~150 fps...
Any idea how old/how many cycles the expansion joint experienced? They're by nature consumable items that need to be replaced which is why some clients don't allow them. The norm unless otherwise specified is ~2,000 cycles.
I don't think anyones been subtle about how abrasive you come off here and how dismissive you've been. Not the best approach when asking for HELP.
Job market is rough for new grads and on the job training is always the norm. Keep applying (especially outside of Linkedin), widen your search to...
Do you even like engineering? Do you know (have you actually done any engineering)? I know many of my classmates went into engineering because its the default push for someone that seems smart and technically inclined - I'd wager at least 50% are doing nothing engineering degree related because...
Possibly misinformed guess, but I've always assumed its because of the (relatively) low pressures involved. It's easiest to just have the regulator sensing the tank pressure near the tank versus relying on an external tap or something more complicated.
Also note that if this is ASME piping all TRVs need to be ASME relief valves. The military installations I dealt with were very against this and only the device into the storage tank was a real PSV. Everything else were regulators that looked like a PSV and was field adjustable.
Hard to say without a sketch, but typically control valves control flow to users/storage. So generally the upstream piping TRV cascades backwards into the supply tank and piping downstream the control valve is "open" to the end user/storage.
I wouldn't route TRV stuff around control valves or...
If you're running stress analysis you need to know the Code requirements and the programs. It's not something where you can just say you followed Caesar II's static seismic wizard and it did whatever, hope its right. That's not how it works.
This is doubly true for full spectrum response...
Note "flexibility analysis" is an out of date term that primarily applies to the old school method of looking at charts and roughly calculated displacements and making sure the piping is flexible enough.
Modern stress analysis is very different, accounting for friction of supports, non-linear...
Never overtly threatened, but definitely had conversations about what my issue was if we "covered everything with enough notes". My general position of we shouldn't need to add a ton of CYA notes to protect ourselves fell on deaf ears. Construction schedules are tight, the client didn't do all...
This is why this forum is useless. The science (the general fact of climate change) is settled. Yes every day we're learning new things and adjusting the known information, thats how science works.
I personally have copies of the studies from the early 1900s, the Exxon climate change report...
I've previously asked the same thing because 90% of the posts here devolve into "nun uh climate change isnt real" or the usual political bs.
Unfortunately this isn't the place where that type of conversation is going to be had. The forum needs to be renamed if we're not going to at least defer...
I agree with the "why not push back" type of mindset, but I also get the business side of not wanting to lose out on money. The catch 22 is those projects are awful and tend to make people look for other employers, so was it really worth it?
I'm seeing similar things and one of the bigger factors, at least in my general heavy industry, is client schedules. Almost every project needs to be done in about 8 weeks and they almost always skipped a good preliminary engineering/FEL phase. The trend seems to be for clients to do FEL2/3 as a...
Caesar defines the default number of cycles as 7,000 which lines up with B31.3 code assumptions. Its on you the designer/engineer to correct it if that's not accurate.
Vertical deflection is not the only criteria for support spacing and given you're putting it on sleepers, it seems ridiculous...
There's a lot of core infrastructure type issues this country (and most around the world) will be facing. No one wants to be the bad guy and rewrite the laws, flood maps, building codes, etc proactively (when the risk is still "low")...so as usual the codes will be written in blood once enough...
I don't work in skyscrapers but NFPA 54 calls out supports to prevent/damp vibrations for gas piping. I know the commercial building world is very different from heavy industry, but I would expect some straps or something to minimize movement during wind/seismic events at a minimum, if not...
