This dataset describes the construction of 1 meter of natural gas pipeline. Long-distance natural gas pipelines play a crucial role in transporting natural gas from production sites or import terminals to consumer markets. The life cycle inventory was compiled from data obtained from multiple sources, with certain data corrected and updated based on averages reported in industry publications. The dataset includes construction materials, energy consumption, installation processes, and pipeline decommissioning, but excludes energy use, raw material consumption, and operational emissions during decommissioning. Manufacturing of production equipment and construction of facilities and other infrastructure are not included within the system boundary of the dataset.