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I don't understand your diagram. Can you provide a P&ID? If not: The blue arrow behind the pumps represents a pressure regulator / bypass? Is the throttle valve manually adjusted so that 15 bar, or what? The gate valve is just a passive component without control function? How long is/was the...

davidbeach and waross, you are right and I misunderstood where the problem is coming from. I found this: https://www.trane.com/content/dam/Trane/Commercial/global/products-systems/education-training/engineers-newsletters/control-systems-electrical-considerations/admapn019en_0106.pdf I don't...

I'm not an electrical engineer. Recently I learned that gas powered cogeneration plants (common on wastewater treatment sites) are poor replacement for a Diesel engine for an emergency power supply, and about another problem: Frequency inverters produce high frequency signals on the side of the...

If one manages to repair the pipeline, how to get the last water out? Pig? Is such a pipe even piggable? Sump pump on a dolly? Has something like this been done?

https://fortune.com/2022/06/10/elon-musk-tesla-nhtsa-investigation-traffic-safety-autonomous-fsd-fatal-probe/ "On Thursday, NHTSA said it had discovered in 16 separate instances when this occurred that Autopilot “aborted vehicle control less than one second prior to the first impact,”...

This is a suggestion for a political/economical framework to tackle climate change - I would call it ambitious social democracy : https://www.currentaffairs.org/2021/11/what-would-it-look-like-if-we-treated-climate-change-as-an-actual-emergency Challenge to anyone who thinks this is to...

From page 115 of this doc - we talked about this upthread, but I don't think we mentioned the time estimates: If this is correct, a grave accident should be unlikely?

Wheat harvests in Ukraine, and fertilizer exports from RU and BY.

I don't understand where Hydrogen should come from. My understanding is that hydrogen forms > 800°C in the presence of water and zircaloy. So is the ssumption that once cooling fails, it takes 7-10 days for the spent fuels to become hot enough to form H2? Or is there another process at play?

What would a realistic worst case look like for the near and wider area? Something similar to fukushima in terms of released material?

The manufacturer of rabble rakes for static primary sludge thickeners has concerns that the rake might get stuck if it's not moving for a longer time (ay power failure). How likely is this actually? How thick does primary sludge get, when thickened statically? The circular thickeners in...

This is how the flame barriers should be positiones with an EPS insulation, barrier means >200mm strip of rockwool. To me (layman) 200mm does not seem like much. The whole thing presumes that an insulation with (highly flammable) EPS is flame retardant, if built properly with a layer of plaster etc.

This week a residential building in Essen, Germany, caught fire: https://www.dw.com/en/germany-fire-rips-through-apartment-complex-in-essen/a-60852478 3 lightly injured, ~100 residents made it out unharmed. Fire broke out on a balcony, spread over whole facade The building was from 2016 or...

Saw a brief segment where a worker talked about moving out from under the building (urging other to follow) shortly before the collapse, because of visible cracks (presumably in the columns, but that wasnt said).

We've had a discussion on 1.4404 vs 1.4571 here a while back: https://www.eng-tips.com/viewthread.cfm?qid=450663

I'm talking about pipe couplings like this: My concern is the gap between the pipe ends - 5m at small diameters, 5-10 at larger (starting at 57 mm). The general wisdom is that gabs and cracks in pipelines are at risk of corrosion. I'm concerend about this 5mm gap (not the coupling). As far as...

Few days ago, criminal proceedings where opened against three persons (neglienice) from the plant. Waste in a tank was stored at too high a tempeature, which lead to self heating. And this is an information page by the plant operator...

There are five in a row, in all except the first the left corner of the arch is somewhat fixed (because of branching pipes entering drilled holes in the building) The pipe is redundant, 90+% of the time it will just sit and be filled with water. In addition to the control of the trace heating...

I was imprecise with my use of the term elbow. Should have used this sketch: As for the rest I understand and agree.

@1503-44 I mean the length of a 90° elbow required to absorb the elongation @littleInch 10-15° elbows Good point re. temperature - I'm thinking -20 (coldest winter plus failure of trace heating) to +40°C (operating temp.), installation will happen at 10-20°C or so.