[WHughes]

I just finished a job installing Carbon/Aluminum piping in a ammonia refrigeration system. The Aluminum cooling unit (for orchards) to the carbon piping. It looked like they joined plates of aluminum and carbon steel then cut out flange type pieces and weldede piping to each side. Where the AL meets the carbon it looked like they were just stuck, I didnt see anything that appeared to be a bond. Very cool stuff.