API-580 Equipment-Specific RBI Applications

Question 1

What unique inspection challenges do heat exchangers present in an RBI program?

Accepted Answer

Multiple damage mechanisms on tube and shell sides due to different process fluids

Answer

Heat exchangers never require inspection

Answer

They can only be inspected when fully disassembled

Answer

Only the external surface needs monitoring

Question 2

How should atmospheric storage tanks be addressed in an RBI program?

Accepted Answer

By evaluating both internal corrosion of the floor/shell and external corrosion of the bottom

Answer

Only by checking the roof for leaks

Answer

By measuring the tank capacity annually

Answer

Atmospheric tanks are exempt from RBI requirements

Question 3

What is the primary concern for piping systems in an RBI assessment?

Accepted Answer

Localized corrosion and erosion at flow changes, welds, and dead legs

Answer

The color of the pipe insulation

Answer

The distance between pipe supports only

Answer

The brand of pipe fittings used

Question 4

Why do pressure relief devices (PRDs) need RBI evaluation?

Accepted Answer

Their failure to operate when needed can lead to catastrophic overpressure events

Answer

They have the highest purchase cost in the plant

Answer

They are purely decorative safety features

Answer

They only need replacement every 50 years

Question 5

How does insulation affect the RBI assessment of piping and equipment?

Accepted Answer

Insulation can trap moisture and hide corrosion under insulation (CUI)

Answer

Insulation always prevents corrosion

Answer

Insulation has no effect on corrosion rates

Answer

Insulated equipment is exempt from inspection

Question 6

What special considerations apply to RBI for equipment in cyclic service?

Accepted Answer

Fatigue cracking must be evaluated in addition to corrosion-based damage mechanisms

Answer

Cyclic service eliminates the need for corrosion assessment

Answer

Only visual inspection is required for cyclic equipment

Answer

Cyclic equipment never experiences corrosion