FEA Model of Cast Haynes 188 Alloy to determine integrity at Elevated Temperature
Solid (FEA) Model of Elevated Temperature Vessel


We performed an (FEA) design analysis of elevated temperature pressure vessels – used in glass fiber production. At these high temperatures creep rupture, creep ratcheting are major concerns.

The glass fiber manufacturing process involves (high temperature) impure molten glass entering an inlet header, and flowing into the vessel – from where it’s discharged to an outlet header and fed to the glass fiber-making process downstream. Each vessel has an inlet and outlet header and which are controlled by four check valves. The check valves allow the vessels to alternate between a fill condition and a discharge condition.

When a vessel is in the fill condition, it is at atmospheric pressure or at a slight vacuum to help the glass flow. For the discharge condition, the vessel is pressurized to 150 psi to feed the molten material to the downstream processes. This cycle is repeated every 90 seconds, alternating between the two vessels to maintain a constant supply to the downstream equipment.

The expected life for the (Cast Haynes 188 Alloy) pressure vessels are 2,200 hours at 1,900 ºF. Each vessel has an inlet nozzle, an outlet nozzle, and a vent nozzle. At these high temperatures, creep rupture, creep ratcheting and creep fatigue damage are major concerns regarding the life of the vessel. ASME Code Procedures were used in the analysis.


We perform elevated temperature design and analysis on components for clients in industries including manufacturing, energy, and aerospace.

Give us a call to discuss your engineering challenges.

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Tom O’Donnell, PE
Vessels for Elevated Temperature Service
Publications – Elevated Temperature Applications

(412) 835-5007

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