The fishplate is a connecting link between the preceding and the following steel rails. Therefore, if the quality of the fishplate is poor, the caused consequences would be unimaginable. Many quality inspection rules shall be followed during production, including surface requests as below:
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The fishplate surface should be clean and smooth without any crack, scarring, scratches or any other defects. The end faces shall not be with any shrinkage cavity mark or intercalation. The allowed surface defects and relative geometrical quantity for both light and heavy rails shall be within the range of standard provisions.
To ensure the fine use of railway accessories and fittings including rail splice bars, it is necessary to maintain the fishplates from time to time, to improve the equipment quality and avoid any accidents. Assembling and maintenance standards of railway fish plates are as below:
The fishplates&#; assembling device in place without any wounds or cracks; fish bolts well fixed.
Each connected rod or out-lock device is not found with any wounds or cracks. No grinding or corrosion on the rod body and abrasion pin hole less than 1mm with good insulation.
All iron rods&#; insulation connection and the insulation link between out-lock iron and gauge rod are both fine. At uninsulated condition, 3mm gap shall be kept and not into other parts. Bolts are fixed well in place as well.
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To guarantee none crack is found on the shell of the switch machine to install fishplates, and the installation is firm under good lock condition.
To ensure the oil tank circuit in good protected condition without any damage or being buried by ballasts or other debris.
A fishplate of rail track after rolling should be straight without significant bending or torsion.
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