This technical requirement specifies the technical requirements for the manufacturing, installation and inspection of the steel structure high-strength bolt auxiliary connectors of mobile machinery and equipment. The content not specified in this technical requirement shall be implemented in accordance with relevant national standards. This technical requirement applies to mobile mechanical steel structures that need to be connected by high-strength bolts.
Joint surface treatment
(1) Friction type high-strength bolt connection requires close contact with the joint surface at the joint and sufficient friction coefficient. When the design drawing does not specify the treatment requirements of the joint surface, the treatment shall be carried out according to the following regulations: sandblasting or shot blasting the high-strength bolt joint surface to remove rust, oil and other impurities on the surface to reach the Sa2.5 level standard , The roughness is 50~75μm, and the friction coefficient shall not be lower than 0.40. When there are provisions in the drawings, follow the provisions of the drawings.
(2) After treatment, the friction surface of the high-strength bolt connection should be protected from dirt and oil. It is strictly forbidden to make any mark on the friction surface of the high-strength bolt connection. It is necessary to prevent contamination of the connecting surface during storage in the factory, or during transportation or storage at the installation site. The installation unit should pay special attention to the cleanliness of the connection surface of the connection plate of the high-strength bolt and the parent body and the characteristics of the friction surface. It is not allowed to use a grinder to polish the connecting surface of the connecting plate and the connecting surface of the mother body.
Classification and Process Flow of Steel DrumsJune 30, 2023The steel drum is one of the traditional containers and occupies a very important position in the traditional containers. The function of steel drums has evolved from temporary storage of contents to ...view
Market of Steel and Plastic Drums in ChinaApril 2, 2022Market of Steel and Plastic Drums in China Steel drums and Plastic Drums are widely applied in various industries, such as Petroleum industry, light industry, chemical industry and even in food packa...view
Weak Demand, Next Week Steel Prices Or High Shock RunJuly 1, 2022Cold rolling: this week, the national cold rolling prices were raised by a narrow range, the general market transaction.Fundamentally, the cold rolling production week on week decreased significantly,...viewUnder Pressure! Steel Margins On Course To Contract By 2022July 1, 2022Recovering from the new covid-19 pandemic and pent-up demand has led to a surge in steel prices at a faster rate than raw materials, thus bringing huge profits to steelmakers.In 2021, the gap between ...view
Installation And Operation Manual Of Open Steel Drum ClosureJune 30, 2022This is the installation instruction for 210 liter open drum closure, taking the clamp locking ring as an example.1. The operator must wear appropriate gloves during the installation of the steel barr...view
Global Shipping System Under The Impact Of The EpidemicJune 30, 2022What has happened to the global shipping system under the impact of the epidemic?1. "Crazy" shipping priceIn the winter of novel corona virus pneumonia, besides the hot vaccine industry, the...view
EN
ko 
fr 
de 
es 
it 
ru 
pt 
ar 
vi 
th 
