National Pipeline System

The national pipeline infrastructure is composed of a variety of materials and put together over the decades using different construction methods to meet the country’s energy needs. There was a huge demand for energy as the country’s manufacturing centers and population thrived during the post WWII era. This is reflected in the fact over 50% of the nation’s pipeline were constructed in the 1950’s and 1960’s. The federal pipeline safety regulations were put in place in 1968-70. Prior to that time, companies adhered to industry standards for construction and pipe manufacturing processes. Some of those processes were sound and produced great quality pipe that serves the public well today. Unfortunately, some processes were not as good and the pipeline can develop problems with long term continued use. In almost all cases, the integrity issue can be managed with operational adjustments and testing. In some cases, the pipe must be replaced. PHMSA has identified certain types of pipe and manufacturing/construction practices that we closely monitor and, in many cases, have specific integrity verification requirements.