woodchuckiam
Trans-Alaska Pipeline
The zig-zags of the Trans-Alaska Pipeline and maintenance road with the Alaska Range in the background from near the Richardson Highway, Alaska, USA. The large "562" sign is the mile marker from the "0" mile marker at Prudoe Bay to the "800" mile marker at Valdez..
A Bit of "Above Ground Pipeline Engineering"
"Specially designed vertical supports were placed in drilled holes or driven into the ground. In warm permafrost and other areas where heat might cause undesirable thawing. The supports contain two each, 2-inch pipes called "heat pipes," containing anhydrous ammonia, which vaporizes below ground, rises and condenses above-ground, removing ground heat whenever the ground temperature exceeds the temperature of the air. Heat is transferred through the walls of the heat pipes to aluminum radiators atop the pipes.
Above-ground sections of the pipeline are built in a zig-zag configuration to allow for expansion or contraction of the pipe because of temperature changes. The design also allows for pipeline movement caused by an earthquake."
From: www.alyeska-pipe.com/Pipelinefacts/PipelineEngineering.html
Trans-Alaska Pipeline
The zig-zags of the Trans-Alaska Pipeline and maintenance road with the Alaska Range in the background from near the Richardson Highway, Alaska, USA. The large "562" sign is the mile marker from the "0" mile marker at Prudoe Bay to the "800" mile marker at Valdez..
A Bit of "Above Ground Pipeline Engineering"
"Specially designed vertical supports were placed in drilled holes or driven into the ground. In warm permafrost and other areas where heat might cause undesirable thawing. The supports contain two each, 2-inch pipes called "heat pipes," containing anhydrous ammonia, which vaporizes below ground, rises and condenses above-ground, removing ground heat whenever the ground temperature exceeds the temperature of the air. Heat is transferred through the walls of the heat pipes to aluminum radiators atop the pipes.
Above-ground sections of the pipeline are built in a zig-zag configuration to allow for expansion or contraction of the pipe because of temperature changes. The design also allows for pipeline movement caused by an earthquake."
From: www.alyeska-pipe.com/Pipelinefacts/PipelineEngineering.html