What is Stud bolt?
Stud bolts are highly applied in the pipe flange connections.
Stud bolts are inserted in the flange holes and tightened to seal a flanged joint. while the number, the length, the diameter of the stud bolts required for a flanged connection depend on the flanges type, diameter, and rating (as per the ASME B16.5 flange bolt chart).
Stud Bolts are externally threaded fasteners without a head, used with 2 nuts on either side, substituting a usual “bolt & nut” assembly. Stud bolts are prominently used in flange connections.
There are different types of stud bolts as below.
Continuous Threaded Stud Bolts
Stud Bolts with uniform threads over the length are termed as continuous thread stud bolts.
Tap End Stud Bolts
Stud Bolts with unequal length of threads at extreme ends with non-threaded center.
Double End Stud Bolts
Stud Bolts with equal thread lengths at either end with non-threaded center.
Double End Stud Bolts with Reduced Shank.
Stud Bolts with equal thread lengths at either end with center reduced further than the actual diameter of the stud.
Flange Stud Bolts (Fully Threaded Studs with Chamfered Ends)
How to make the stud bolt?
Stud bolt are made of Steel wire/round bar,with rolling the thread on the wire/roud bar.
Below is the main process to make the stud bolt.
Automatic Loading => Double heads Chamfering => Marking => Thread rolling => Nut assembly => Automatic Unloading (packaging system)
Stud bolt là gì?
Thực chất, hai khái niệm Guzong (Gu dông) và Stud Bolt là một và đều chỉ một loại bu lông dạng thẳng có ren ở hai đầu, có thân trơn ở giữa hoặc ren tiện ren toàn bộ. Kích thước và hình dạng của gu dông không theo một quy chuẩn nào cả mà sẽ được sản xuất theo tùy yêu cầu công việc
Common bolt specifications are abbreviated as follows:
a) Normal alloy steel: Grade B7 bolts x Grade 2H nuts.
b) Low temperature alloy steel: Grade L7 bolts x Grade L4 nuts.
c) Austenitic stainless steel: Grade B8M bolts x Grade 8M nuts.
If you have some difficulty to chose the right bolt for the flanges?
Want to learn more about A193 B7 VS 193 L7 Stud bolt？