Flanged pipe joint: bolt circumferential pitch for a leak-proof joint For a flanged pipe joint, what range of circumferential pitch (bolt spacing along the circle), in terms of the bolt-hole diameter d, helps ensure a leak-proof joint? Choose the correct range.
Mechanical Engineering
Machine Design
Difficulty: Easy
Choose an option
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ALess than 20d
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BGreater than 30d
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CBetween 20d and 30d
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DEqual to the inside diameter of the pipe
Answer
Correct Answer: Between 20d and 30d
Explanation
GuidelineFor leak integrity and uniform gasket compression, typical design practice keeps circumferential bolt pitch within a moderate range.
Rule of thumbA leak-proof flanged joint generally uses circumferential pitch: 20d ≤ pitch ≤ 30d.
Common pitfallToo large a pitch risks local gasket relaxation and leaks; too small a pitch is uneconomical and unnecessary.
Final AnswerBetween 20d and 30d