Stud bolt standard, use and purpose

You may be familiar with bolts, but if you mention stud bolts, you don't know what they are used for. You may not know the difference between stud bolts and bolts. Several friends of Xiaotu need to use stud bolts recently, but they don`t know the specific standard of stud bolts. They are afraid of buying stud bolts of poor quality, so they come to Xiaotu for help. Xiaotu deliberately collected some relevant information about stud bolts on the Internet, hoping to help everyone.
A brief description of the stud bolt standard The stud bolt standard is very important for production and inspection. What are the contents of the stud bolt standard and what are the applications of the stud bolt? The following will introduce you to the relevant content of the stud bolt standard. The stud bolts are manufactured according to the GB897-901 standard. The materials used are: Q235, 45#, 40Cr, 35CrMoA, Q345D, and the specifications are: M3mm-M100mm. The length can be customized according to user needs.
High-strength stud bolts, materials are 35#, 45#, 35CrMoA, 25Cr2MoV, 304, 316, 304L, 316L, 2H, 2HM, B7, B7M, B16, B8, 8, B8M, 8M, widely used in electric power, chemical industry , oil refining, valves, railways, bridges, steel structures, automobile and motorcycle accessories and other fields. Stud bolt function: generally used in mining machinery, bridges, automobiles, motorcycles, boiler steel structures, hanging towers, long-span steel structures and large buildings, etc. . Representation method of stud bolts: general stud bolts are expressed as: M12100GB/T901-88 (standard) 35#/35# (material) 8.8 grade/8 grade (modulation level) means: diameter=12mm length=100mmGB/ T901-88 adopts the national standard (of course, the industry standard can also be adopted according to the needs) 1. It is used for large-scale equipment, and accessories need to be installed, such as sight glass, mechanical seal seat, deceleration frame, etc. Head bolts, one end is screwed into the main body, and the other end is equipped with a nut after the accessories are installed. Since the accessories are often disassembled, the threads will be worn or damaged, and it is very convenient to replace them with stud bolts.
2. When the thickness of the connecting body is very large and the bolt length is very long, stud bolts will be used. Stud bolt standard: GB/T900-1988 Double-head bolt national standard reference: GB2 fastener outer screw spinning parts end; GB196 common thread basic size; GB197 common thread tolerance and fit; GB1167 transition fit thread (screw into cast iron, steel body); GB1180 overcurrent fit thread (screwed into aluminum bowl); GB3098.1 mechanical properties of fasteners stainless steel bolts, screws, studs and nuts; GB3098.6 mechanical properties of fasteners stainless steel bolts, screws, studs and nuts Nuts; GB3103.1 Fastener tolerance bolts, screws and nuts; GB5267 Electroplating of threaded fasteners; GB5779.1 General requirements for fastener surface defects bolts, screws and studs; GB5779.3 Fastener surface defect bolts, Special requirements for screws and studs; acceptance inspection, marking and packaging of GB90 fasteners; marking method of GB1237 fasteners.
The main purpose of stud bolts
1. When the main body is large-scale equipment, accessories need to be installed, such as sight glass, mechanical seal seat, reducer rack, etc. At this time, stud bolts are used, one end is screwed into the main body, and the other end is equipped with a nut after the accessories are installed. Since the accessories are often disassembled, the thread will be worn or damaged, and it is very convenient to use the stud bolts to replace.
2. When the thickness of the connecting body is very large and the bolt length is very long, stud bolts will be used.
3. It is used to connect thick plates and places where it is inconvenient to use hexagonal bolts, such as concrete roof trusses, roof beam suspension monorail beam suspension parts, etc.
The main purpose of stud bolts
In actual work, external loads such as vibrations, changes, and high-temperature creep of materials will cause friction to decrease, and the positive pressure in the thread pair will disappear at a certain moment, and the friction will be zero, so that the threaded connection will loosen. will loosen and fail. Therefore, anti-loosening must be carried out, otherwise it will affect the normal work and cause accidents.