In this article, you will learn about the difference between Piping and Pipeline.

When it comes to transport the fluid, Piping and Pipeline are the most frequent words used in Oil & Gas industries. Let us explore the similarity and differences between Piping and Pipeline. Piping and Pipeline both used to transport various liquids, gases, and sometimes slurry and powder material.

Straight Vs Complex

The pipeline is series of straight pipe welded together over a long distance. For example, the West-East Pipeline in China is 8,200 KMs longs.

Piping is a complex network of pipe & fittings within the defined boundaries of the plant.

Above Ground / Under Ground / Sub-sea

The pipeline can run underground, aboveground, and underwater such as a subsea pipeline. Whereas Piping is mostly above ground with very few underground services.

Large Dia Vs Small Dia

Another difference between Piping and Pipeline is that Pipelines are mostly large diameter that transport bulk liquid or gas from one place to other sometimes 1000s of miles in distance. Whereas Piping can be from ½” to 80” as per the plant design requirements that transfer fluid from one equipment to another within the plant boundary.

Use of Equipment

In the pipeline, the use of pipe fittings is limited. Mostly long radius bends with very few other types of fittings that use at a pumping station and valve station.

Whereas in the case of a piping very wide range of pipe fittings are used that serve different purposes within the piping system such as change the direction, size, branching, blinding, etc.

Similarly, in pipeline few pieces of equipment are used within the Pipeline system such as pumps, valves & instruments that support the function of the system to transport fluid safely over a long distance.

Whereas a verity of equipment such as a pump, valves, filter vessel, column, heat exchanger, instruments are used within the piping system that supports the function of the plant to produce finish product.

Piping Courses

Design Codes & Standard

The last difference between Piping and Pipeline,   In Oil & Gas Industries, a pipeline is designed in accordance with ASME B31.4 that is code for Liquid Transportation Systems for Hydrocarbons, Liquid Petroleum Gas, Anhydrous Ammonia, and Alcohol and ASME B31.8 that is code for Gas Transmission and Distribution Piping Systems.

Whereas Piping is designed in accordance with ASME B31.3 that is Process Piping code and for power plant piping ASME B31.1 that is code for Power Piping.

Series of straight pipe welded together for a long distance Complex network of pipe   & fittings within the defined boundaries of the plant
underground,   aboveground and underwater such as subsea pipeline Mostly above ground   with very few underground services.
Mostly   large diameter Can be from ½” to 80”   in diameter
Use   of pipefittings are limited. Very wide range of   pipefittings are used.
Few   equipment are used within the Pipeline system Verity of equipment   used within the piping system
Design   in accordance with ASME B31.4, ASME B31.8 ASME B31.3 , ASME B31.1   

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