TransCanada Keystone pipeline leaks 795,000 litres of crude

[phreezee]

Nice! Thx Trump!

[The Cosworth]

So sounds like a bit of work due to the alternative route, but still promising. Hope they don't use this approval against Trans Mountain.

[ExtraSlow]

Approval is one thing, actual finishing construction is another. I anticipate several years of sit-in style protests to delay this. I'd be very surprised if it was built anywhere close to the advertised timeline.

[g-m]

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Anyone see the report on the pipeline in the great lakes. 42 out if 48 sites inspected failed. An oil leak there would be deveastating.

http://www.freep.com/story/news/2017...ust/393768001/
This one? The one that just passed hydro at double MOP and almost 10x the regular operating pressure stated in the article? You've been reading Greenpeace weekly.

[spike98]

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http://www.freep.com/story/news/2017...ust/393768001/
This one? The one that just passed hydro at double MOP and almost 10x the regular operating pressure stated in the article? You've been reading Greenpeace weekly.

You are using to big of words for the average green peacer.

This pipeline consultant mentioned in the article doesn't even know what he is talking about.

"Hydrotests don't really test girth welds that hold pipe segments together," he said. "They will use other records to (assess) that. It also doesn't tell you about pinhole leaks."

[Abeo]

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You are using to big of words for the average green peacer.

This pipeline consultant mentioned in the article doesn't even know what he is talking about.

"Hydrotests don't really test girth welds that hold pipe segments together," he said. "They will use other records to (assess) that. It also doesn't tell you about pinhole leaks."

Didn't read the article, just your quotes.

Girth welds aren't affected by pressure the way longwelds are. But they rarely are a problem until you end up with slope instability and the pipe in longitudinal tension, or if it's under water and there is a free span under it and there is vortex induced vibration. The coatings around girth welds, however, can be a problem. As for pinhole leaks, a hold test will check for anything currently leaking. But if there is something at 95% of wall thickness, and is very short, the hydrotest won't pop it.

edit: just read the article. My statements stand. But I am no way making a statement regarding Enbridge, Line 5, or providing any assessment on the fitness for service of that line.

[g-m]

The hydro won't but the ILI will.

Weld records from construction would be evaluated and they could go do additional NDE if there were concerns. Coating repairs would be done as needed as well

[spike98]

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Didn't read the article, just your quotes.

Girth welds aren't affected by pressure the way longwelds are. But they rarely are a problem until you end up with slope instability and the pipe in longitudinal tension, or if it's under water and there is a free span under it and there is vortex induced vibration. The coatings around girth welds, however, can be a problem. As for pinhole leaks, a hold test will check for anything currently leaking. But if there is something at 95% of wall thickness, and is very short, the hydrotest won't pop it.

edit: just read the article. My statements stand. But I am no way making a statement regarding Enbridge, Line 5, or providing any assessment on the fitness for service of that line.

No a hydro test wont pop it. Hydrotests aren't intended to be destructive testing. But a hydrotest will verify the integrity given any actual defects present. Especially one at 2 x MOP.

At any rate, my point is, these green peacer experts tend to use flashy words and spin things to make them sound big bad and dangerous when in reality, its not the whole truth.