How heat exchanger works

  API 577 isn’t just about welding—it’s about understanding how welds behave, how they fail, and how inspectors evaluate them. If you approach it as a mix of practical inspection + applied metallurgy, everything becomes much clearer.     Preparing

  What are you expected to know for the exam? Introduction: Previously, API did not feel the need to provide publication effectivity sheet or body of knowledge for API 577 Welding Inspection and Metallurgy Exam simply because the only recommended