Pipelines: The Most Efficient Way to Move Energy — And Why Keeping Them Intact Matters

Pipeline transportation emits 0.44 grams of CO2e per ton-mile for crude oil. Rail emits 4.4 grams. Trucks emit 19.6 grams. That is not a close comparison: pipelines are 10 times cleaner than rail and 45 times cleaner than truck transport per unit of product moved. On efficiency alone, pipelines are not really in competition with other modes.

The debate about pipeline investment often misses this point. Despite the growth of renewable energy, the International Energy Agency projects global oil demand to remain elevated for decades, with the transportation sector as the primary driver. The infrastructure that moves that product matters a great deal.

Safety and Spillage: The Numbers Are Clearer Than the Headlines

Pipelines account for roughly 0.01% of total oil spilled annually in the U.S., compared to 28% for tankers and barges and 15% for trucks and railcars, according to the American Petroleum Institute. Accidents happen across all modes, but the per-volume risk profile for pipelines is dramatically lower than alternatives.

Pipelines also remove energy transport from shared road and rail infrastructure, eliminating the compounding risk that comes from mixing hazardous cargo with civilian traffic. Once installed, a pipeline operates underground with minimal surface footprint and no ongoing disruption to communities along its route.

Longevity Is the Variable Nobody Talks About

The efficiency and safety case for pipelines is well established. The part that gets less attention is longevity: specifically, how long a pipeline actually maintains that performance.

Steel pipelines are designed for decades of service life, but corrosion starts from day one. External corrosion from soil contact, stray electrical currents, and AC interference from shared right-of-way with high voltage power lines all degrade pipe wall integrity over time. Internal corrosion from product composition and water content compounds the problem from the inside out.

A pipeline that was 10 times more efficient than rail on its first day of operation is not automatically 10 times more efficient 40 years later if its integrity has been compromised. Efficiency is a function of throughput capacity and uptime, both of which erode along with the pipe if protection is not maintained.

Cathodic Protection Is What Makes the Numbers Hold

Cathodic protection is the primary tool for controlling external corrosion on buried steel pipelines. Supply the pipe with a small counteracting electrical current and you stop the electrochemical reaction driving corrosion. Done right, CP extends pipeline service life well beyond original design assumptions.

The challenge is that pipeline CP is not a set-and-forget system. Soil resistivity changes seasonally. Shared right-of-way with high voltage AC transmission lines creates interference that disrupts protective current levels. Coating holidays develop over time, creating localized exposure points that need supplemental anode coverage. PHMSA regulations now require operators of previously unregulated gathering lines to document CP coverage as part of Mega Rule compliance. That is a federal acknowledgment that CP is not optional infrastructure.

What ACC Supplies to the Pipeline Industry

American Carbon Company supplies cathodic protection anodes for buried pipeline systems across the U.S. BADGERCONNECT Magnesium Anodes for galvanic protection on smaller or remotely located lines. BADGERCOAT MMO Anodes and BADGERCABLE Linear Anodes for impressed current systems on larger transmission infrastructure. BADGERCORD Zinc Ribbon Anodes for AC mitigation on pipelines sharing right-of-way with high voltage power lines, a growing challenge as transmission infrastructure expands to support renewable generation.

The efficiency case for pipelines is strong. Protecting that efficiency over a 40 to 60 year service life is where cathodic protection earns its place in the investment equation.