Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Ease of manufacture
Reducing stress concentration
Fullering and caulking
Safety

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Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

New and old belts will cause vibrations
Only one belt cannot be fitted with other used belts
The new belt will carry more than its share and result in short life
Belts are available in sets

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