Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than ______________ mm?
Correct answer: C. 30
- A. 10
- B. 20
- C. 30
- D. 5
Explanation
For equipment walls thicker than about 30 mm, the extra thickness generally provides sufficient margin, so a separate corrosion allowance is usually not required. This makes 30 mm the relevant design rule rather than 10 or 20 mm.
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