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High Pressure Shell and Tube Heat Exchangers
High Pressure Shell and Tube Heat Exchangers
Struthers Wells has supplied several thousand heat exchangers for essentially every type of application and in virtually every commercially available alloy. Heat exchangers have been designed for design pressures up to 7,900 psig, design temperatures up to 1600 F, and in sizes up to the maximum shipping limitations.
As one of the original founders of Tubular Exchanger Manufacturers Association (TEMA), and a charter member of Heat Exchange Institute (HEI), Struthers Wells has contributed in developing numerous standard mechanical, thermal, fluid, and vibration algorithms and calculation methods that have been the basis for many current modern computer programs used by many industry leaders.
The tube sheet for the Breech Lock heat exchanger is designed for a differential pressure. The internal bolts are used to apply the seating load to the gasket at the tube sheet shell interface. The pressure end load is absorbed by the threaded closure and the outer row of external bolts applies the seating load to the channel gasket. The inner row of external bolts is used to increase the seating load between the tube sheet and shell gasket in the event of relaxation of the inner bolts.
Self-Energized Gasket Closure –
Multi-wall Shell Construction
To overcome thick shell rolling limitations in the late 1950s, Struthers Wells developed a proprietary laminated shell called Multi-wall construction. Multi-wall vessels are utilized for Ammonia Converters and Urea Reactors. Due to the process fluids, the inner layer of the vessel is alloy material, such as Stainless Steel, Titanium, or Zirconium. The Multi-wall vessel solves many material and fabrication problems and presents a competitive design when compared to mono-wall vessels.
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