New and updated features of this title Cross-discipline content updates REVISED: The 4th Edition provides a modernized curriculum, in addition to new content and improved content flow. REVISED: The new edition leverages updated NCCER curricula from other disciplines, including modules from Millwright, Pipefitting and HVACR. UPDATED: Updates were made to modules covering industrial maintenance practices, including the topics of low-pressure steam, high-pressure steam generation, heat exchange equipment, distillation towers and vessels, and tube work. UPDATED: Modular enhancements include new presentations of fundamental principles, updates to safety sections, introductions to new technology and upgrades to environmental considerations. Enhanced pedagogy ENHANCED: Improved images appear throughout. Images sit beside text descriptions and procedural steps to help trainees better absorb information. UPDATED: Improved learning objectives complement this edition's modernized curriculum. Objectives list the skills and knowledge needed to successfully complete the module.