All you need to know about subsea pipelines

Subsea pipelines play a very significant role in our daily lives and also in major company or country deals. Many subsea pipelines have been laid for the transportation of crucial commodities as discussed below.

What are subsea pipelines and what can they transport?

A subsea pipeline is any pipe system that is laid in water. The term subsea pipeline generally refers to any pipeline i.e. natural gas, crude oil, industrial by-products or treated sewage that is transported under water. This term commonly refers to gas and oil pipe systems that are submerged in the sea, river or ocean. Subsea pipeline systems consist of various designs and specifications depending on the material being transported. Subsea pipelines are responsible for the transportation of oil, gas and hazardous materials across oceans.


We use pipelines all the time, they are essential in our everyday lives.

How are subsea pipelines installed and how do they work?

A special conveyor is installed on the pipe laying vessel. After receiving the welded pipes, they are tested for defects and an anticorrosion agent is applied to every joint. The tubes are moved towards the aft. Using a stinger, the pipes are immersed into the water at an angle and then lowered into the seabed. Installation may occur in three different processes, Tow-In, S-lay or J-line pipe installation. Currently, the best pipeline technology that works best is the collapsible plastic pipe system. They can be anchored to the seabed and are flexible: this pipeline can cut off the flow to allow deflation of the pipe to minimise damage risks in extreme conditions. The pressure in the pipes is adjusted in onshore and offshore terminals.

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