Central Heating and Cooling Power Plants

Project Description

Super Heater Emergency Repair

When in use Super Heated steam is used to drive turbines for electrical power generation. McNolty was contracted on an emergency basis to develop new welding procedures for “ChromAlloy T-22”. Due to the high temperature setting inside the combustion chamber the welding procedure needed to be performed to include all pre and post heat treatment and a strict monitoring of interpass temperature. In all a total of 32 tubes in 3 separate Super Heaters(5, 6 & 7) were replaced for the Canadian Government in a Type 3 Confined Space requiring time critical shutdowns.