What standard must copper tubing meet according to NFPA requirements?

According to NFPA (National Fire Protection Association) requirements, copper tubing used in LP gas systems must meet the specifications outlined in Type K or Type L ASTM B 88. These specifications ensure that the copper tubing is suitable for handling the pressures and temperatures associated with LP gas. Type K and Type L are commonly designated thicknesses of copper tubing, with Type K having thicker walls than Type L. This distinction is important for ensuring safety and integrity within the gas delivery system.

The standards set by the ASTM (American Society for Testing and Materials) provide guidelines not only for the physical properties of the materials but also for their suitability in various applications, particularly in the context of gas and fluid handling. Adhering to these specifications is crucial for preventing leaks and ensuring that the installation complies with safety regulations.