Construction Management Engineering

Pipeline Project Construction [PDF]

pipeline construction

What is the Pipeline Construction?

Pipelines are used to transport oil and gas to treatment plants (e.g., oil batteries and gas plants), and from treatment plants to market. Pipelines are also used to carry water that is produced by gas or oil wells (produced water) to processing plants so that they can be cleaned and disposed of. Pipes come in different sizes and have different pressures, depending on the type of content and volume.

Main types of pipelines in the oil and gas industry:

1) Gathering system pipelines: These pipelines collect raw gas & oil from well sites and carry them to processing facilities, such as an oil battery or gas plant. Gathering pipelines system always have a relatively small diameter and operate at relatively low pressure.

2) Transmission system pipelines: These pipelines ship the processed gas and oil to market. Transmission pipelines system tend to have a large diameter and operate at high pressure.

Factors that affect the design of pipeline include the thickness of pipe wall, type of metal alloy used, type of corrosion-resistant coating used, and spill- or leak-reducing features. A pipeline must run through ground that is clear and free of development. The amount of a “set back” or the amount of clear land needed on either side of a pipeline varies considerably and depends mainly on the following: the type of oil, gas, or mixture to be carried; the pipeline pressure; the hydrogen sulphide content of the oil or gas; the risk of corrosion; and the proximity of the pipeline to people and sensitive environments. Pipelines are normally laying underground, but in some cases, pipelines are raised on supports above the ground.


Planning of Pipeline

Before the construction of pipeline starts, an extensive route selection and planning process takes place. Firms investing in the pipeline will want to develop the most profitable construction project. Therefore, they’ll select the ideal pipeline route and size, and they’ll consider expanding the construction project to include more sources of oil or gas along the route of the pipeline. Planners generally look for a pipeline route that uses previously disturbed areas to minimize new environmental damage. Planners may conduct an assessment for environmental impact, depending on the size and type of pipeline planned.


Steps of Pipeline Construction

1. Building access roads
2. Clearing land
3. Installing the pipeline
4. Building facilities to operate the pipeline

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