The metal post under the table
is supposed to break free from both the floor and the receptical under the table, if it does not, remove the screws from both the sole and the table, free the ends from the stainless pipe, then lube the fittings so they work freely, re-fasten the top and bottom pieces then you can remove the pipe anytime you want. If the parts are corroded together so as they will not come apart, new ones are found at a camper/RV store.