A few days ago, the machinery industry standard "Fastener Pull-torsion Composite Testing Machine" edited by State Grid Zhejiang Electric Power Company was approved and promulgated by the Ministry of Industry and Information Technology. This industry standard is the first cross-industry technical standard compiled by the company as the first drafting unit.

It is reported that the standard specifies in detail the technical requirements, inspection methods, inspection rules, marking and packaging of the tensile-torsion composite testing machine for the fastening characteristics of fastener threads, and is suitable for research and application in electric power construction, machinery manufacturing, and construction engineering. field.

This technology originated from the Zhoushan Great Leap Forward Project. The company has developed a series of fastener testing technologies and devices through the implementation of quality inspection of large-size fasteners, the gradual refinement of technology, and the in-depth research on the relationship between fastener axial force and torque. , and related technologies have been authorized by the national invention patent, which provides an important technical standard for the quality inspection and experimental research of hot-dip galvanized fasteners for transmission towers.