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Welding Boiler Tube. Header material is P22. Evaluating Tube-to-Tubesheet Welding Types.
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Weld the two half cylinders to the tube and one to each other. These were newly designed due to an increase in performance and problems with existing boilers. Header material is P22.
After weldingall tubes shall be heat treated at a temperature of 1650F900 or higher and followed by cooling in air or in the cooling chamber of a controlled-atmosphere furnaceCold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200F650or higher.
Header material is P22. The tube holes in a watertube boiler are located in the drum rather than in the head and Fig. Great Service Since 1967. Removal of the corrosion products is important preweld cleaning.
