Loading arms enable the transfer of fluid to and from the tank via a system made up of pipe, hose, and/ or valves. When transferring a pressurized fluid, a liquid loading arm is needed and at times a vent line. Safeguards needs to be taken to prevent fireplace and explosion https://lpgstationpipingsystem27048.ampedpages.com/not-known-factual-statements-about-lpg-service-stations-62033903