A Vacuum Tower Operating at 740º F Is Being Entered

question 257

Multiple Choice

A vacuum tower operating at 740º F is being entered to inspect. Several sets of Type 410 SS trays are bent at various angles. The trays are removed in order to straighten them. When an attempt is made to straighten them cracks form at the bends. What type of damage mechanism would cause the cracks to form?

• A) Hydrogen embrittlement
• B) Sulfide stress corrosion cracking
• C) 885º F embrittlement
• D) High temperature corrosion

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