NFPA Liquefied Petroleum Gas Code (NFPA 58) 2025 – 400 Free Practice Questions to Pass the Exam

In the context of the NFPA Liquefied Petroleum Gas Code (NFPA 58), the vapor pressure limit for corrugated stainless steel piping systems is defined to ensure safe operation and to prevent failures in the piping infrastructure. The vapor pressure refers to the pressure exerted by the vapor in equilibrium with its liquid at a given temperature.

The limit of 5 psig indicates that this is the maximum pressure that the corrugated stainless steel piping can safely handle without risking structural integrity or leaks. Exceeding this vapor pressure could lead to the failure of joints or the piping itself due to excessive stress, which is particularly critical when handling Liquefied Petroleum Gas (LPG) that requires stringent controls to ensure safety. This specification helps maintain safe gas flow, reduces the risk of accidents, and adheres to industry safety standards.

Understanding this vapor pressure limit is essential for professionals working with LPG systems to ensure compliance with NFPA standards and to promote safety in the design and operation of gas supply systems.