[All] Line 9: Engineering concerns.
Louisette Lanteigne
butterflybluelu at rogers.com
Wed Mar 12 00:03:44 EDT 2014
Hi folks
NEB delegate Darko Matovic, assistant prof of engineering from Queens University was a delegate at the Line 9 hearings by way of written submission. I wanted to relay to inform GREN of the engineering concerns behind Line 9. I is the most compelling argument in my view to help secure a provincial review.
Here is a correspondence from Mr. Matovic below and in the attachments as well as a correspondence from Engineer Charles Rhodes
Lulu
_______________________________________________________________
I went to the detailed line 9B map and colour coded it using the same colours
that are in the spreadsheet. This can be very helpful in locating exact features
and where the line wall is thicker. The untouched yellow sections are the
default, 0.25" thickness. You will notice that the locations are very
innacurate. Often the 0.5" wall sections that should be under the river, creek,
etc. are shifted by 300 to 500 m! At one point the kilometer posts are reversed.
I also attach a brief set of my own comments. They are just scratching the
surface. I hope we all can put now the line to much closer scrutiny. You can
download coloured map from my Dropbox:
https://www.dropbox.com/s/gz1j1ijlbwdiclt/Detailed%20Line9B%20route%20map%20-%20coloured.pdf
The spreadsheet is also available (I already sent the link before, but here it
is again):
https://www.dropbox.com/s/gl847vfl2c6mydk/LineDataColoured.xls
My notes are attached.
I also suggest that we include Dr. Charles Rhodes into this correspondence
(included in the email here). While he didn't act as an intervenor, he was
invaluable in providing Rick Munroe with sound engineering advice. Like myself,
he is also a Professional Engineer, but unlike me, he has extensive experience
in oil industry and can help us hone our arguments further.
___________________________________________________
Here is the letter from Dr. Charles Rhodes that Darko was referring to:
___________________________________________________
Hello All:
The simple truth is that the pipeline is an accident waiting to happen unless there is a hydro static test to 150% of maximum approved operating pressure ( MAOP). If a pipe section is so cracked that it cannot withstand this test that section of pipe needs to be replaced now. Enbridge can use pigs to identify and replace most cracked sections before a hydro static test. However, pigs are not 100% reliable, especially with respect to external cracks that are adjacent to welds. Hence there is no substitute for a full scale hydro static test to 150% of MAOP. Testing to 125% of MAOP, as contemplated in CSA Z662-11, is not good enough because it does not give an adequate working life to the pipe after the test. A test to 125% of MAOP on a 0.25 inch wall pipe merely shows that there are 0..05 inches (1.27 mm) of safety margin. Cracks are known to penetrate such pipe wall at rates in the range .15 mm / year to .40 mm/ year.
Hence under CSA Z662-11 the working life of the pipe after pressure testing until the next pressure test is in the range:
(1.27 mm / .4 mm) = 3.2 years to (1,27 mm / ,15 mm) = 8.5 years. I highly doubt that we want to revisit this matter only three years hence. Thus it is essential that everyone insist on a hydro static pressure test to 150% of MAOP. TELL YOUR FEDERAL MPs AND PROVINCIAL MPPs THAT NOTHING LESS THAN A HYDRO STATIC PRESSURE TEST TO 150% OF MAOP is satisfactory. CSA Z662-11 is intended for new pipelines in rural areas, not for old pipelines in the middle of Toronto. The NEB process and CSA Z662-11 are both designed to maximize pipeline company profits, not address public safety. THIS PIPELINE DOES NOT MEET PROVINCIAL SAFETY STANDARDS!
Absent a pressure test to 150% of MAOP everyone should assume that eventually there will be a rupture failure, and if that failure occurs in the GTA the cost will be many billions of dollars. Enbridge is a large company but I doubt its capacity to fund a $10 billion to $20 billion spill clean up. Hence Enbridge should carry third party insurance of $10 billion to $20 billion per incident. If Enbridge has to choose between properly fixing the pipe and paying the insurance premium on a $20 billion policy it will probably choose to fix the pipe, which is what it should have done in the first place.
Best Regards,
Charles Rhodes, P. Eng., Ph.D.
Xylene Power Ltd.
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