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For pipelines that encounter saturated soils or water, wood lagging is often installed in between bolt-on concrete weights, acting as a spacer to keep the weights in place as well as to provide mechanical protection to the pipe. River weights are generally used at river and creek crossings to
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Wood lagging involves wiring a series of wooden slats together to create a 'blanket'. This blanket of wooden slats is then dropped over and wrapped around the outside of a pipeline, with or without coating, and secured with steel or plastic banding.
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Wood lagging is especially useful to protect pipelines in rocky terrain; steep inclines; around rivers or swampy areas; and in areas with poor natural availability of padding, such as sand or gravel.
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The longevity of wood lagging that has been installed underground is unknown. However, intact wood lagging has been found still performing its function more than 50 years after installation:
42:. Wooden lagging acts as a sheath, protecting the pipeline from damage, and is especially useful in rocky terrain; steep inclines; around rivers or swampy areas; and other rough terrain.
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sites. As a method for protecting pipelines, wood lagging offers high-impact resistance at a considerably reduced cost compared to other types of pipeline protection, such as
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Once wood lagging is installed, the pipeline can be buried and backfilled. (Wood lagging is installed as part of the “padding and backfill” stage of construction.)
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The BC Gas
Southern Crossing Pipeline, constructed in 2000. Wood lagging was used in approximately 22 km of the 315 km pipeline route.
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Materials for wood lagging can often be sourced regionally near pipeline construction sites, reducing transportation time and costs.
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effect after pipeline burial, providing minimal environmental impact compared to other types of pipeline protection.
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Wood lagging has been used on notable pipelines such as The Trans-Mountain
Pipeline, which spans the
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332:"Kinder Morgan preserves nature's bounty with a minimalist approach to a major build project"
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engineers to provide mechanical protection for underground pipelines. Others include
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Sun
Canadian's company policy is to cover exposed pipes with wood lagging.
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of pipelines in stream, high water table situations, or in swampy areas.
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is a method of banding wooden slats around pipelines to protect against
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453:"Pacific Trail Pipelines: Item VII: Pipe Protection (wood lagging)"
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162:. The wooden slats around boiler are an example of boiler lagging
563:(8:30 – Wood Lagging with Bolt On Weights across Thompson River)
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A different, but related, use of wooden slats was for lagging
361:. South Dakota Public Utilities Commission. 2007. p. 23
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The Kinder Morgan TMX Anchor Loop, constructed in 2007 by
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Wood lagging is light, flexible, and easy to install at
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Wood lagging is one of several solutions employed by
381:"Patent for a mass-production Wood Lagging machine"
183:Modern examples of wood lagging used to protect
46:is akin to pipe lagging, but is used to protect
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523:"Sample Crossing Agreement: Item 5 (g) Page 4"
167:The Trans-Mountain Pipeline, which spans the
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379:Adelard Bouchard, Paul (December 2, 2010).
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16:Method of protecting pipelines with wood
458:. Kitimat - Summit Lake Looping Project
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330:Parks, Stephanie (August 1, 2010).
406:. Enbridge Energy. August 29, 2011
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265:"Settlement of Backfill, excerpt"
59:The Kinder Morgan TMX Anchor Loop
497:Ross, Elsie (October 17, 2008).
477:"Oil Across The Rockies (film)"
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553:Part 1 (1953 historical film)
528:. Sun Canadian. April 5, 2011
200:Kinder Morgan Energy Partners
580:(3:00 onward – wood lagging)
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135:used in wood lagging is a
245:Hollow structural section
225:, for example in trains.
92:high-density polyethylene
479:. Archival Footage. 1953
432:Page 1: Joint Protection
147:Historic and modern uses
139:resource that creates a
503:New Technology Magazine
240:Pipe (fluid conveyance)
158:GWR Firefly replica at
576:Oil Across The Rockies
568:Oil Across The Rockies
559:Oil Across The Rockies
551:Oil Across The Rockies
434:. Shaw Pipe Protection
356:"HydroCarbon Pipeline"
302:Mohitpour, Mo (2003).
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269:National Energy Board
189:natural gas pipelines
160:Didcot Railway Centre
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90:coating, rockshield,
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204:Jasper National Park
141:carbon sequestration
78:Construction process
67:Jasper National Park
594:Pipeline transport
425:"Joint Protection"
235:Pipeline transport
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28:Wood lagging
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588:Categories
532:2012-04-06
508:2012-04-06
483:2012-04-06
462:2012-04-06
438:2012-04-06
410:2012-04-06
386:2012-04-06
365:2012-04-06
341:2012-04-06
279:2012-04-06
251:References
191:include:
137:renewable
128:coating.
40:corrosion
229:See also
126:concrete
107:buoyancy
88:concrete
84:pipeline
73:Overview
36:abrasion
208:Alberta
63:Alberta
578:Part 4
570:Part 3
561:Part 2
310:
38:, and
32:impact
526:(PDF)
456:(PDF)
428:(PDF)
404:(PDF)
359:(PDF)
599:Wood
308:ISBN
187:and
133:Wood
206:in
185:oil
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