Pipeline Construction Phase

Once a pipeline company like Western Pipeline Corporation obtains all of the necessary permits and satisfies all regulations, the actual pipeline construction phase may begin. Because extensive surveying of the proposed route occurred, there should be no surprises that slow down production in the construction process, rather, installing the pipeline is similar to a fast assembly line with different stages.

The pathway for the pipe must be completely cleared of all impediments, such as trees and root systems, rocks, brush, or anything else, not just for the pipeline itself but also for the equipment that needs to access the site. Then, sections of pipe are placed along the path. This is known as "stringing" the pipe. Each section may vary in length from 40 to 80 feet in length and is designed specifically for the location, taking into account coating material and thickness requirements.

Next, the trench digging process will commence. Each trench is usually five or six feet deep because it is required that the pipe be at least 30 inches below the ground. In some circumstances the pipeline must be buried even deeper such as intersections or water sources. After the trenches are sufficiently dug, the pipeline is assembled and bent slightly to fit the path. The sections must be welded together and because a coating mill usually leaves the ends clean for welding purposes, the ends must be coated. Once the coating is complete, it is inspected for any defects.

After this phase of assembly is complete, the pipe is ready to be lowered into the trenches. The pipeline must be lifted and lowered uniformly to prevent any pressure on the welded joints. This is accomplished with specialized construction equipment with track systems that move in sync when lifting and lowering. When the pipeline is in place, the trench is carefully filled in, taking every precaution not to damage the pipe or the coating material.

The hydrostatic test is the final step in the construction phase of pipeline placement. This test is conducted by running water through the pipe at pressures that exceed any amount that might be needed when transporting natural gas. The entire length of pipe must undergo the hydrostatic test to insure the strength of the pipeline. It will also determine if there are any leaks or fissures before any natural gas is sent through the line.

The construction phase of laying pipeline is actually one of the quickest and simplest parts of putting in a new pipeline. Once the path and "right of way" are determined, all permits and regulations are followed, and the pipes have been assembled in the mill, the construction phase is quite efficient.

About the Author: Bob Jent is the CEO of Western Pipeline Corporation

Western Pipeline Corp is a successful, private independent producer of oil and natural gas.

Article Source: http://EzineArticles.com/?expert=Bob_Jent