... ASTMB111,C68700, manily for Evaporator,Heat Exchanger,Condenser,Distiller,Oil Well Pump,Ferrule and so on 1. Standard: ASTMB 111, C68700, CuZn20AL2 ... ;4. Application : manily for Evaporator,Heat Exchanger,Condenser,Distiller,Oil Well Pump,Ferrule and so on Seamless Aluminum brass tube ASTM C68700