Material: | Steel |
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Surface Finishing: | Zinc Plated |
Certification: | ISO |
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The lifting ring screw is forged as a whole and undergoes normalizing treatment and removal of oxide scale; The forgings have no over burning or crack defects; The hanging ring screws have undergone hardness testing, with a hardness value of HRB67~95. The strength grade of the screw for the lifting ring of the power crown is 12.9.
The lifting ring screw must be installed vertically on the workpiece plane, and the joint surface must be flat and tight. It must be adjusted to the stretching direction, and the screw should avoid contact with sharp edged objects.
The lifting ring screwdriver passed a test load of 2.5 times the working load, and underwent 20000 fatigue tests at 1.5 times the working load. The lifting ring screws must meet or even exceed the requirements of ASME B30.26 standard. The lifting ring screws are made of alloy steel and produced with high reference to the German RUD WBG type. This product is exported in large quantities to Europe and America and has passed the local G80 standard inspection. Better material, higher tensile strength than existing domestic hanging ring screws, providing tensile testing reports. The lifting ring screws must be operated by professional personnel, and please refer to the instructions for use. When connecting with the lifting device, the connection between the lifting device and the lifting ring should be kept rotating freely, and regular safety checks should be conducted by professional personnel. The maximum working load can reach 30T and can be customized with imperial threads.