For a leak-proof flanged pipe joint with bolt hole diameter d, the circumferential bolt pitch should not exceed_________________?
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Answer: D. 20Vdto30Vd
Explanation
Flanged pipe joints subjected to internal pressure require closely spaced bolts to maintain uniform gasket compression. Empirical design rules ensure bolt spacing remains small enough to prevent fluid leakage between bolt locations. Standard engineering formulas restrict maximum circumferential bolt pitch to a range of twenty to thirty times bolt diameter. Flanged connections join pipes together securely using gaskets compressed between matching steel flange faces. Circumferential bolt pitch measures the distance between adjacent bolt centers along the perimeter of the flange circle. Inadequate bolt spacing allows gasket relaxation and high-pressure fluid leaks across the sealing interface.
Smaller pitch multipliers like ten times bolt diameter create unnecessarily crowded flanges with excessive manufacturing costs. Pitch ranges below fifteen times bolt diameter exceed standard pressure vessel design requirements for normal flanged joints. Spacing exceeding thirty times bolt diameter fails to maintain adequate gasket compression, resulting in pressure leaks.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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