| 摘要 |
PROBLEM TO BE SOLVED: To provide piping for a fuel cell with clean inner faces and of good quality and low cost which has no risk of leaving or generating hazardous ion that might be an obstacle to catalytic reaction. SOLUTION: With the method of manufacturing fuel cell pipes of stainless steel using necessary processes from the manufacturing line consisting of a cutting process, a molding process, a boring process, a tacking process, a brazing/solid solution-making heating process, and an inner-face cleaning treatment process, at least a cleaning process for melting and removing metal powder deposited on the inner face of the pipes including end faces at the above inner- face cleaning treatment process. |
