A bolting system is a mechanical fastening assembly used to securely join manway components in industrial equipment through threaded fasteners.
A bolting system for manways consists of threaded bolts, nuts, washers, and sometimes studs designed to create a pressure-tight seal between the manway cover and vessel opening. These systems must withstand operational pressures, thermal cycling, and mechanical stresses while allowing for periodic inspection access. Critical applications include pressure vessels, reactors, tanks, and boilers where secure closure is essential for safety and process integrity.
诱因 → 失效模式 → 工程缓解
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The bolting system creates and maintains a pressure-tight seal between the manway cover and vessel opening, allowing safe access for inspection and maintenance while preventing leaks during operation.
Bolting systems should be inspected during each vessel entry, with torque checks recommended every 6-12 months or after significant temperature/pressure cycles. Complete replacement may be needed every 3-5 years depending on service conditions.
Hydraulic torque wrenches, tensioners, or calibrated manual torque wrenches with proper lubrication. Cross-pattern tightening sequences are critical for uniform gasket compression.
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