I am trying to unhook a gas stove flex line. The joint B turns fine so I can unthread it. However the joint A seems to be seized and won’t turn. As a result, I cannot remove the hose as the hose cools on itself. What am I doing wrong? Is there a way to loosen this joint so that the connection turns freely at the flex line and doesn’t twist when I turn the nut? Thanks.
EDIT: To aid others who had trouble removing this, added photo to show how this was finally undone, with help of this amazing group. Thanks @AlaskaMan. Basically the connection was between two chrome hex parts and it was just too tight. I was afraid to break it but the answers here gave me confidence to just go with it. Make sure you have a couple of good pipe wrenches.