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Nord Stream: Tie-ins and hyperbaric welding

wermac.org

31–40 of 280 posts

Re: Nord Stream: Tie-ins and hyperbaric welding

#31
post #27

Earlier quoted context omitted.

This IS cheap energy at scale, they just skipped the clean part.

You can't really separate clean and cheap because somebody will have to pay for the pollution eventually.

For all $SOMEBODY elements of the set { Everybody else }

Re: Nord Stream: Tie-ins and hyperbaric welding

#32
post #19

Hey. Let me walk you through the Donnelly nut spacing and crack system rim-riding rip configuration. Using a field of half-C sprats, and brass-fitted nickel slits, our bracketed caps, and splay-flexed brace columns vent dampers to dampening hatch depths of one half meter from the damper crown to the spurve plinths. How? Well, we bolster twelve husk nuts to each girdle-jerry, while flex tandems press a task apparatus…

The original machine has a base-plate of prefabulated aluminite, surmounted by a malleable logarithmic casing in such a way that the two main spurving bearings were in a direct line with the pentametric fan. The latter consisted simply of six hydrocoptic marzlevanes, so fitted to the ambifacient lunar waneshaft that side fumbling was effectively prevented. The main winding was of the normal lotus-o-delta type placed in panendermic semi-bovoid slots in the stator, every seventh conductor being connected by a non-reversible tremie pipe to the differential girdlespring on the "up" end of the grammeters.

Re: Nord Stream: Tie-ins and hyperbaric welding

#33
post #4

What a giant waste of taxpayer money, built when many - especially in east European countries - were already warning something exactly like this year would happen. Cool technology though.

Why were they warning that this would happen? Who were they thinking would do this?

Re: Nord Stream: Tie-ins and hyperbaric welding

#34
post #8

I found this section from another page on the same site amusing: > Nord Stream developed a high environmently-conscious logistic concept which guarantees that transport vessels have not to travel more than 100 nautical miles (185 kilometers). [...] This concept of short trips and environmentally friendly transport saves roughly 200,000 tonnes of carbon dioxide when compared against other options and the use of existi…

Those 150k tons are for heating people's homes. Whereas the spend on the boat fuel is simply for construction of the pipeline so if you can optimize that, that's under your control, as the company laying pipe right now.

Though maybe you prefer everyone die of cold until we have a solution to transition out of natural gas without returning to coal or wait 10 years to build more nuclear.

Re: Nord Stream: Tie-ins and hyperbaric welding

#35

I worked in oil and gas in a previous life. The absolute wildest people I've ever met are saturation divers - divers who live in pressurized chambers on ships for months at a time to avoid having to decompress after dives. Fantastic money but you need a few screws loose to handle the work.

Looked at this - https://www.youtube.com/watch?v=SbAxa-_3h6E, pretty wild.

Re: Nord Stream: Tie-ins and hyperbaric welding

#36
I wonder with what these pipelines are filled during construction?

An inert gas like Nitrogen or Argon is probably too expensive, natural gas might be too dangerous when welding is still necessary. Seawater is probably too dirty and aggressive.

And as a related question: Should the pipeline fill up with sea water completely (for example because of large scale damage and loss of pressure) is it possible to make the pipeline usable again?

Re: Nord Stream: Tie-ins and hyperbaric welding

#37
post #34
post #8

I found this section from another page on the same site amusing: > Nord Stream developed a high environmently-conscious logistic concept which guarantees that transport vessels have not to travel more than 100 nautical miles (185 kilometers). [...] This concept of short trips and environmentally friendly transport saves roughly 200,000 tonnes of carbon dioxide when compared against other options and the use of existi…

Those 150k tons are for heating people's homes. Whereas the spend on the boat fuel is simply for construction of the pipeline so if you can optimize that, that's under your control, as the company laying pipe right now. Though maybe you prefer everyone die of cold until we have a solution to transition out of natural gas without returning to coal or wait 10 years to build more nuclear.

>Those 150k tons are for heating people's homes.

This is a misrepresentation: natural gas is used for a variety of purposes, with industry and home use approximately tied, varying by EU country. Germany for example, uses more natural gas for industrial purposes than heating homes.

>Though maybe you prefer everyone die of cold until we have a solution to transition out of natural gas without returning to coal or wait 10 years to build more nuclear.

This kind of personal vitriol doesn't belong on Hacker News.

Re: Nord Stream: Tie-ins and hyperbaric welding

#38
post #33
post #4

What a giant waste of taxpayer money, built when many - especially in east European countries - were already warning something exactly like this year would happen. Cool technology though.

Why were they warning that this would happen? Who were they thinking would do this?

Joe Biden threatened to do it live on air: https://m.youtube.com/watch?v=UKn8TM47BTc

Re: Nord Stream: Tie-ins and hyperbaric welding

#39
post #34
post #8

I found this section from another page on the same site amusing: > Nord Stream developed a high environmently-conscious logistic concept which guarantees that transport vessels have not to travel more than 100 nautical miles (185 kilometers). [...] This concept of short trips and environmentally friendly transport saves roughly 200,000 tonnes of carbon dioxide when compared against other options and the use of existi…

Those 150k tons are for heating people's homes. Whereas the spend on the boat fuel is simply for construction of the pipeline so if you can optimize that, that's under your control, as the company laying pipe right now. Though maybe you prefer everyone die of cold until we have a solution to transition out of natural gas without returning to coal or wait 10 years to build more nuclear.

> or wait 10 years to build more nuclear

Maybe not closing nuclear would have been enough.

Re: Nord Stream: Tie-ins and hyperbaric welding

#40

I wonder with what these pipelines are filled during construction? An inert gas like Nitrogen or Argon is probably too expensive, natural gas might be too dangerous when welding is still necessary. Seawater is probably too dirty and aggressive. And as a related question: Should the pipeline fill up with sea water completely (for example because of large scale damage and loss of pressure) is it possible to make the pi…

That's actually why I looked this up in the first place. I think it's just air from what I could gather. The three sections of the pipe are laid on the seafloor like this (with the open end staying out of the water): https://www.wermac.org/nordstream/html_img66.html.

And then those three sections are welded together using an "air-tight habitat" surrounding them.

From what I've heard salt water getting into the pipe could make it really difficult to repair, and it might have to be scrapped altogether.

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