|MadSci Network: Physics|
Dave, I visualize your application per the illustration below. The expansion tank, and its contents, is attached to the T joint. The expansion tank is not supported. Calculate the total force applied to the stress points: Tank = 16 lb. Distance from center of tank to center of stub = 10" = 160 in/lb. Water = 8.33 lb. Distance from center of water to center of stub = 5" = 41.6 in/lb. Total force = 201.6 in/lb. Force applied to each stress point = (201.6/2) = 100.8 in/lb. A perspective for this amount of force: The recommended torque for a _" machine screw is 120 in/lbs. (1). Ref. (1) www.night rider.com/biketech/hdtorquevalues.htm
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