Pipeline Security Act This bill revises the duties of the Transportation Security Administration (TSA) to include securing pipelines and pipeline facilities against cybersecurity threats, acts of terrorism, and other acts that jeopardize the physical security or cybersecurity of the pipelines or facilities. Specifically, the bill (1) establishes a pipeline security section within the TSA, (2) directs the TSA to develop a personnel strategy for enhancing operations within such section, and (3) requires the TSA to publish updated pipeline security guidelines. The TSA must also convene not less than two industry days to engage with relevant pipeline transportation and pipeline facilities stakeholders on matters related to the security of pipeline transportation and pipeline facilities.