Pipeline Construction

Welding the pipe

The sections of pipe will be joined together by welds. Welding shelters are sometimes placed over pipe segments so welders can fuse the segments together while protected from wind or weather. Welders use techniques to make the points where the pipes connect even stronger than the steel in the pipe. Each weld is inspected using an X-ray or ultrasound and is checked for certification per clients specifications.

Coating the pipeline

To prevent corrosion, special coatings may be applied to the pipe during the manufacturing process. The coatings are formulated to actually bind to the molecules in the steel, creating a powerful shield. The protective coatings are precisely designed for the conditions outside the pipeline. In cases where internal coating is needed to reduce friction, the lining is adhered to the pipe during manufacturing and the welded joints are coated at the site.

Epoxy coatings are commonly used in North America to protect against water permeation and abrasion from materials in the soil. The coatings bond to steel pipe through a mechanism commonly referred to as polar bonding.  This is important to the strength and efficiency of the pipe. These coatings have effectively helped pipes become almost impenetrable. 

Positioning the pipeline

The welded pipeline is then gently lowered into the prepared foundation of the trench. Bulldozers using cranes called side booms carefully place the pipeline into the prepared trench bed. The side booms are designed to prevent damage to the pipe and its exterior coating.

Installing valves and fittings

At this point, any shutoff valves and remote sensors are installed. The sensors will send information to the master control room on flow rate, pressure, and temperature, allowing technicians to closely monitor the line.

Special valves can quickly shut off the pipeline in case of emergency.

Restoring the site

Once the pipeline is in place in the trench, the topsoil is replaced in the sequence in which it was removed and the land is returned to its original shape. The process from staking the right-of-way to beginning the restoration of the site can take place in as little as 10 days.  

Give TK Gas Services a call at 740-826-0303.

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