Post Weld Heat Treat Of Each Half of a 1,000,000lb Vessel Using Internal Fired Gas Combustion Heating

Each of the two vessel halves are PWHT using three 6M BTU high velocity gas combustion burners. They are fired through a temporary bulk head at the center open end into special SS tubes. The burners are used to control the temperature in three zones along the 54foot vessel section, holding a tolerance +/- 25°F at 1275°F.

Following complete fabrication, PWHT and NDT, the two half sections were welded together with a center round seam that was later locally post weld heat treated using electrical resistance heating equipment. On full acceptance, by the client, the finished reactor vessel was loaded onto a special transport trailer and prepared for shipping to the South Texas chemical plant.