(1) New fasteners should have production licenses, product quality certificates,s and inspection reports.
The quality inspection of the old fasteners should be carried out before use. Those with cracks and deformation are strictly prohibited to be used. The bolts with slippery threads must be replaced. Both new and old fasteners should be treated with anti-rust treatment. Seriously corroded fasteners and damaged fasteners should be repaired and replaced in time. Oiling the bolts ensures easy use.
(2) The fitting surface of the fastener and the steel pipe should be in good contact. When the fastener clamps the steel pipe, the minimum distance at the opening should be less than 5mm. The fasteners used shall not be damaged when the bolt tightening force reaches 65N.m.
Post time: Sep-08-2022