The excess flow check valve shall be provided on each arm of the manifold to ensure stoppage of LPG supplies in case of heavy leakage/damage to the pipeline in the downstream facilities. The capacity of the excess flow check valve shall be +10/-20 percent of designed flow rate.

Note: Although the standard specifies that an excess flow check valve shall be provided on each arm of the manifold, the typical illustrations within the standard do not indicate the inclusion of these valves in the installation. It’s also worth noting that each liquid off-take valve on the cylinders already comes with an inbuilt excess flow check valve. Therefore, adding an additional excess flow check valve to each arm of the manifold could potentially create operational issues and may not be necessary.