Flexible metallic connectors shall NOT exceed what length when used with liquid or vapor piping on stationary containers of 2000 gallons or less?

Flexible metallic connectors are used in various applications, including propane systems, to provide the necessary flexibility for connections while maintaining safety and integrity. For stationary containers of 2000 gallons or less, regulations specify that these connectors should not exceed a length of 5 feet when used with liquid or vapor piping.

The reason for this limitation relates to safety and the prevention of excessive movement that could lead to wear, leaks, or ruptures, especially in a system carrying pressurized liquids or gases. A length of more than 5 feet increases the risk of dynamic forces acting on the connector, such as vibration or thermal expansion, which could compromise its ability to maintain a reliable seal.

Operating within this length ensures that the connectors can efficiently handle the stresses involved while providing adequate flexibility necessary for installation and maintenance without creating undue risk of failure. This regulatory measure is based on established safety practices within the industry to protect personnel and property from potential hazards associated with propane service.