INTERNAL COATING DEVICE OF STEEL PIPE OR DUCTILE CAST IRON PIPE

摘要

PURPOSE: An internal coating device of a steel pipe or a cast iron pipe is provided to minimize drooping by making a long supply pipe by multi steps. CONSTITUTION: An internal coating device of a steel pipe or a cast iron pipe comprises a supply pipe(10) inserted into a steel pipe or a cast iron pipe and a nozzle(20) for spraying powder paint on the inside of heated steel pipe or cast iron pipe. The first water cooling pipe(30) and the second water cooling pipe(40) are installed in the outside of a supply pipe.