Thornton Engineering helped a valued client re-design and manufacture a shell and tube heat exchanger at an ammonia plant. The modified heat exchanger replaced a second-hand exchanger that was originally designed for a very different application.
The heat exchanger featured modifications to provide greater reliability. The scope of work included thermal and mechanical design, material supply, fabrication, orbital tube welding, local PWHT, hydrostatic & acoustic testing, surface treatment, preservation and transportation to site.
The replacement heat exchanger included the following material changes to improve reliability:
- Shell Side – Carbon Steel
- Tube Side – 1-1/4Cr, 1/2Mo
Design registration was also undertaken with statutory state authorities.
|Design Pressure:||5100kPa/FV(Shell); 4000kPa(Tube)|
|Material||A213-T11 (Tube), A516-70 (Shell)|
|Number of Tubes||527|
|Tube to Tubesheet Joint:||2 Pass Strength Welded + Expansion|