Top Chinese supplier of wind turbine founation anchor bolt.

Wind Tower Bolt

Wind Tower Bolt Supplied from Longteng

Wind tower bolt and nut plays a important role as joining components in fastening different parts of wind turbine tower, Longteng is a professional manufacturer which supplies high grades fasteners 8.8-12.9 for wind tower projects.

Wind Tower Blade Bolt Supplier

Wind Tower Installation – Tower Bolts and Flange

Wind tower shall be installed on concrete anchor cage foundation, and different part of wind tower are connected with tower bolts and flange. 2 wind turbine tower sections are jointed with high strength hex bolt and hot rolled steel flange, the bolting process shall be accurate, for less torque will make the fastening loose, and more torque will break the bolt and nut when bearing other forces, which lead to serious structural problems. Wind tower sections are bolted together inside the tower. The quality of the flanges and the bolt tensions are important parameters for the safety of wind turbine towers.

Wind Tower Bolt Specification

Bolt ProductBolt TypeBolt StandardGradeDimension
Wind Tower Bolthex head boltGB5782/GB57838.8, 9.8, 10.9, 12.9M30~M42
GB1228-123110.9M30~M42
DIN6914-691610.9M30~M42
EN14399-410.9M30~M52

Wind Tower Bolt Equivalent Standard

GBISODIN
GB5782ISO4014DIN931
GB5873ISO4017DIN933

How to Prevent Wind Tower Bolt From Rusting

High strength hex bolt installed inside wind towers get rusted for many factors. First of all torque adjustment are repeatedly taken in the installation and maintenance process, and galvanized layer might be broken and peeled off. High temperature and moist environment will not only cause rusting on the bolt surface, it will also reduce the steel tensile strength and not easy to remove. Here are the tips on how to prevent wind tower bolt from rusting:

  1. Spray anti-rusting paint in the bolt holes in flange before install and replace new tower bolt.
  2. Install the wind bolt and ring in dried flange hole.
  3. Install nut and make proper pretension.
  4. Clean the fastening area and spray anti-rust paint
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