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Valtech Engineering builds 82.0" catalyst line expansion joint

December 8, 2016

Valtech builds 82.0" OD hot wall unlined expansion joint for vessel internal sealing.  Part has catalyst flow on both sides and has a braid seal for internal liner and external cover along with 304H pantograph hardware.  5 psig at 1400 F with 3 ply testable 321H bellows and 0.375" thk expanded ducting.  Extensive use of E16-8-2 weld wire for low ferrite weld deposit.  Bellows was solution annealed and stabilized in an inert atmosphere.



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