MCC-NH Gas Fitters Practice Exam

Securing all joints is a crucial action before pressurizing newly installed piping because it ensures that all connections are tight and leak-free. Properly securing joints minimizes the risk of joint failure when the system is pressurized, which could lead to gas leaks and potential hazards. Each joint must be adequately tightened and calibrated according to the manufacturer's specifications and industry standards to prevent any leaks from forming under pressure. Ensuring that all joints are secure establishes a safe foundation for the whole piping system, thereby protecting both equipment and personnel from potential risks associated with gas leaks. This foundational step is vital and complements other important actions like performing visual inspections, using leak detection methods, and ensuring proper support for piping, but securing the joints is the immediate step required to ensure readiness for pressurization.