pipeline construction.pdf

7/28/2019 PIPELINE CONSTRUCTION.pdf

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POST GRADUATE DEGREE

Pipeline Construction

By

Eng. Ahmed Mohamed Kamel El-Said EL-Nahrawy

ALEXANDRIA UNIVERSITY FACULTY OF ENGINEERING


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Introduction:

Pipeline construction process starts with initial planning and the entire

construction process takes up to 17 to 18 months. Initial planning include

determining the market need, specification of pipe and components, land

acquisition, environmental assessment, land permitting, public consultation,pipeline design and route selection etc.

The construction process not only covers the civil work to lay the pipeline, it also

has to cover all the work related to the installation process of the field devices

that will support remote operations. The main purpose of constructing the

pipelines is to carry a variety of materials for residential, commercial and

industrial needs.

Pipelines construction phase begin after the route selection, environmental

permitting, surveying, preparing the right of way, stringing the pipe, easements

negotiations, and other pre construction phase have been accomplished. After

this pipeline is carefully placed in the pre dug trench under waterways and roads,

and if trenching is involved the trench is filled and post construction process

begins. The whole process of pipeline construction has three different phases

such as pre construction, construction and post construction.In addition, construction phase includes bending and joining the pipe, positioning

and coating the pipelines, installing valves and fitting and backfilling the trench

is done. High side and low side are two different types of installation which

needs to keep in mind while determining the pipeline route and geography of the

pipeline installation.

There are various steps involved in pipeline construction process such as:

Clearing, grading and trenching Stringing and welding pipe segments Depositing the pipeline Backfilling and Testing Restoring


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Types of Pipelines

Depending on its purpose, pipelines are of different types like gathering lines,

transmission lines, distribution lines and feeder lines. Gathering pipe lines are the

group of smaller interconnected pipelines forming complex networks and these

lines travel short distances gathering products from wells and then move to other

facilities. The purpose of these lines is the bringing of crude oil or natural gas

from several nearby wells to a treatment plant.

Transmission lines are also known as transportation pipeline having long

diameters, moving products between cities, countries and even continents. These

are energy highways, transporting materials across the international provinces or

within the provinces. On the other hand distribution lines are composed of

several interconnected pipelines with small diameters used to take the products tothe final consumers and is used in local distribution companies to distribute the

materials, whereas feeder lines move products from batteries, processing

facilities and storage tanks in the transmission pipelines. These are used to

distribute gas to homes and business downstream.

In order to construct pipelines, environmental or climatic conditions must be

considered which can affect the construction process like heat and cold both can

impact the characteristics of the pipeline such as its flexibility and joints.

It is necessary to plan first and consider all requirements and the things which

can impact and then start the construction process so that without delay, project

has been completed easily.

pipeline construction.pdf

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