Identify the quality of lifting sling whether good or not ,Normally, the below suggestions for reference
Check whether there are fluffies on the sling belt or the sewing thread. Good slings ' appearance look smooth.
Check the stitching line, the interconnecting space between the stitching line is even,and the stiches are even as well,then this would be the good sling,the webbing sing can bear strength evenly.
Check the connetion sewing part,connecting sewing part of good web sling would be tight,and sewing lines and thread are even not like a mess.
Check the eyes part: The eyes of web sling is the most vulnerable part, especially the load bearing point on the eyes. so the treatment here is essential, good web sling usually are sewed very tight and evenly,and most of the time sewn into a rectangular shap, and here no connecting thread is allowed,as that will affect the breaking strength of the eyes,the more times the eyes are stitched,the more strength will loose.
Check the total length of the sling:Put the webbing sling on the flat ground,and clap it into flat and straight shape, measure the length of the total sling,if the length difference is within 2cm,then it is a good webbing sling,if it is within 5cm,then it is just qualified,and if it is more than 5cm,then it is a defective webbing sling.
Check the shape of the websling:Put the web sling on the flat ground, and then clap the web sling with your palm into flat shap,but no stretch it hard, if the web sling finally is straight line with no tilt,then it would be a good web sling, otherwise it is defective.
Check the color, usually,the EN 1492-1 has specific color code requirements for each capacity of polyester sling.Such as 1T would be violet,2T should be green…and different capacity has different color.The color of good quality webbing slings would be very beautiful,shinning,and bright. On the other hand,you can use tissue to wipe the surface of the webbing sling,to see whether the color would fade,Nomorlly,black and red color has a tiny fade problem,but the other color won't has this problem.
Last but not the least,the most important thing is to test its breaking strength,if the conditions is allowed, it is recommended to use tensile testing machine to do a test,and the specific parameters can be refered to the relevant industry standards: EN1492-1.
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NANJING WELL RIGGING CO.,LTD has grown up to be a modernized enterprise characterized by manufacture,trade and service,,mainly supply the series of Lifting&Rigging products, such as the polyester sling,chain sling,tie down strap as well as the G80/G100 rigging hardware,we have sufficient supply to meet customers' different demand.