Conduits Pipe - 51020

What is Freight Class?

When you ship your products as LTL (less-than-truckload), you must assign your shipment a freight code. This is a standard code implemented by the National Motor Freight and Traffic Association which allows carriers to easily identify qualities of the shipment and assist with transportation logistics.
Ship conduits pipe accurately by using the information below:
Conduits Pipe

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Commodity note:
Aluminum, corrugated, SU, to determine the diameter of Arched Culvert or Pipe, add the span (the longest cross-sectional dimension) and rise (the cross-sectional dimension at the center of the span) of the Arched Culvert and divide by 2, when corrugated Aluminum Culverts or Pipes are nested, the diameter of the outermost culvert or pipe must be used to determine the applicable class rating, also applies on bends, couplings, crosses, laterals, reducers, tees, and wyes. If any of the fittings named herein has more than one diameter, the largest diameter will determine the applicable class rating, diameter in inches as follows:

Subclasses for

Conduits Pipe - 51020

Often, NMFC codes have multiple subclasses. These subclasses almost always distinguish various densities.
In this instance, the commodity, conduits pipe, is further broken down in the following subclasses:

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Subclass Info
Subclass NMFC Code
Freight Class
Subclass Notes
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Please note: This is for educational purposes only. Ultimately, the carrier reserves the right to classify the groups.

Related Commodities


Where can I find freight class code lookup?

The National Motor Freight Traffic Association (NMFTA) annually publishes a list of freight class designations, codes, and subclasses for commonly shipped items ( To access this list, you are required to pay a subscription fee. Learn more about freight classes for free on our freight classes pages.

What is the least expensive freight class?

Freight class 50 is the least expensive because it refers to the freight that is easiest to transport for the carriers.

What is the NMFC class for baseballs?

The NMFC freight class for baseballs is 85.