A pipefitter installs, assembles, maintains, and repairs high-pressure industrial and commercial piping systems that carry chemicals, acids, steam, oil, or gas . [ 1 ] Key Responsibilities Reading Blueprints: Interpreting technical schematics and isometric drawings to plan pipe layouts and positioning. Fabrication and Shaping: Measuring, cutting, threading, bending, and grooving heavy-duty metal pipes (such as carbon steel or stainless steel).