The Burner and Evaporator included the Economizer duct to combination test at a site (Air leakage test at 0.3 Mpa or 3 Bar) for YRT Project (Heat recovery steam generator). Meanwhile, above photo show the so many point to leak on the casing or duct of an Economizer and Evaporator. The result not acceptable and the process to be used for repairs can be check in the “Repair record” as per attachment sheet.