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Bolts - Stud Bolts.. |
Bolts and Nuts
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Bolts and Nuts for flanged connections In Petro and chemical industry for flange connections Stud Bolts and Hex Bolts are used. The Stud Bolt is a threaded rod with 2 heavy hexagon nuts, while the Hex Bolt has a head with one nut. Nuts and head are both six sided .. |
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Method for calculating Stud Bolt length Stud bolts are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia .. |
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Thread Pitch Chart Coarse Thread Series (UNC/UNRC) is the most common designation for general application bolts and nuts. Coarse thread is beneficial, because they are less likely to cross thread, more tolerant in adverse conditions and facilitate quick assembly .. |
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Differences between ASTM grade Studs There are some significant differences in both the mechanical properties and testing requirements of ASTM studs .. |
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ASTM A193 B7 vs A320 L7 Stud Bolts ASTM A320 L7 has the same chemical and physical properties as B7, with additional Charpy V Notch tests taken at -101°C (-150°F) for low temperature applications .. |
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ASTM A194 Grade 7 vs A194 Grade 4 While A194 Grade 4 and A194 Grade 7 nuts are mechanically identical and have the same intended applications, the only difference is the chemical values .. |
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Bolt materials
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Most common stud bolt materials List of the most common stud bolts materials covered by ASTM A193 .. |
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API 20E and API 20F bolting standards API 20E and 20F specify requirements for different bolting specification levels (BSL), and define different levels of technical, quality and qualification requirements .. |
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Special Bolts and Nuts
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What are Rotabolts? Rotabolts are Tension Controlled Fasteners and the only practical direct stress/strain measurement technique currently (2022) available on the market .. |
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Double-End Stud Bolts Double-end studs are intended for use in constructions where one of the threaded ends is installed into a tapped hole and on the other end a hex nut with for example a washer is used to clamp the fastener to the surface into which the bolt is screwed .. |
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Lock Nuts Lock nuts or locking nuts are special types of fasteners designed to provide secure fastening .. |
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Belleville washers Belleville washers, also known as Belleville springs, are a type of non-flat washer .. |
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Fasteners Coating
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Xylan® Coating Xylan coating is an extreme performance coating, explicitly designed to improve the performance and extend the life of various industrial and consumer products .. |
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Flange Bolt-Up
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Flange Bolting Torque Tables The torque tables are built on specific assumptions regarding bolt and nut factor. Before using a given torque table, these assumptions should be verified to insure they are appropriate for the specific application .. |
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Torque calculation Torque calculation of ASTM 193 Grade B7 and B16 Stud Bolts used with Spiral Wound Gaskets .. |
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