Enbridge failure - photos
Enbridge failure - photos
(OP)
Thought I would post these photos of the Enbridge pipeline failure in Michigan. Full rupture, not a leak. Does not look like corrosion, but possibly SCC (or something else). Time will tell...





RE: Enbridge failure - photos
RE: Enbridge failure - photos
A question properly stated is a problem half solved.
Always remember, free advice is worth exactly what you pay for it!
http://www.ap-dynamics.ab.ca/
RE: Enbridge failure - photos
RE: Enbridge failure - photos
RE: Enbridge failure - photos
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: Enbridge failure - photos
jt
RE: Enbridge failure - photos
What happens if distillate supply fails, can pumping pressure rise and expose a weakness?
I'd guess the online sensors would catch any high viscosity and if they didn't, the pumps would have safety bypasses to prevent excess line pressures and I would also guess that if the safety bypass failed the max pump pressure ought to be within the safe working pressure of the pipe....
....but then if everything was as it should be there'd be no accidents...
JMW
www.ViscoAnalyser.com
RE: Enbridge failure - photos
RE: Enbridge failure - photos
RE: Enbridge failure - photos
You'd normally have a high pressure discharge control valve, a safety relief downstream of that, plus PT connected to the pump shutdown switch, unless the pipeline was designed for a pressure profile with inlet pressure equal to maximum pump shutoff pressure.
"The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward X-CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: Enbridge failure - photos
RE: Enbridge failure - photos
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Looks like a time dependent defect who's time came up...
RE: Enbridge failure - photos
RE: Enbridge failure - photos
RE: Enbridge failure - photos
Good old fashioned coating disbondment/failure, and subsequent loss of cathodic protection = corrosion.
RE: Enbridge failure - photos
"The pipe in the affected segment was manufactured by Siderius in 1969 and is constructed of 3O-inch x 0.250-inch wall thickness, grade X-52 submerged arc weld pipe"
30 inch pipe is longitudinal seam welded.....was the failure along the axial seam weld ?
Although the fish mouth failure points to the conclusion of pressure surge,.....IMHO.....its not a "good enough" fish mouth, if failure occured at the weld seam.
-MJC
RE: Enbridge failure - photos
Mike Halloran
Pembroke Pines, FL, USA
RE: Enbridge failure - photos
JMW
www.ViscoAnalyser.com
RE: Enbridge failure - photos
RE: Enbridge failure - photos
Of more interest is the planned 2500 mile long crude oil line planned from the tar sands to the vancouver island terminal- I can only guess at the overpressure that would occur if a valve slammed shut on that beast.
RE: Enbridge failure - photos
The Enbridge Gateway project is only 1150 km ( plus 1150 km return for recycled distillate) .
RE: Enbridge failure - photos