When choosing a safety net
Safety net procedures
General false network procedures are not complete. Qualified safety net suppliers should be able to provide the following procedures:
1. written formalities
"Production License for Industrial Products" "Safety Mark Certificate for Special Labor Protection Articles", instruction manual, and recent inspection report. If it is a copy, it should be stamped with the red chapter of the supplier, otherwise the formalities will be invalid.
2. Logo on the product
Each safety net shall be securely sewn with the QS logo, the special labor protection articles safety signs and inspection certificates. The inspection certificate shall include: product name, product specification and model number, trademark (if registered), manufacturer's name, site, production date or production batch number, industrial product production license number, safety mark identification, and implementation standards. If the product is implemented in 1997, safety certifications are also required.
The appearance of the safety net
1 dense mesh
The mesh density of the dense mesh should not be less than 800 meshes/100cm2. The open eye ring at each edge must be firm and reliable, and the 8mm ≤ ring aperture ≤ 12mm. Edges are even, straight, and leak-free.
The color of the generally qualified dense-mesh safety net is brighter, feels smoother, and the net body is thicker, and the hand-pressed deformation is small; while the dense-mesh net of the recycled material is generally dark in color, feels rough, and the net body is thin and transparent. .
Most of the light, thin and dense mesh meshes are unqualified. Thin meshes with thin nets and unreduced total weight of nets are mostly made of inferior side ropes to increase the weight. Even the use of plastic paper wrapped mud to increase the weight of the side ropes is extremely harmful.
2. Flat (Li) network
The net shape of the flat (leg) net should be a rhombus or a square, and its mesh side length should not be more than 8cm. The width of the flat net should not be less than 3m, the width of the vertical net should not be less than 1.2m; if the flat net has ribbed rope, the spacing should not be less than 30cm.
In comparison, fake nets are light in weight, with loose mesh, messy colors, large meshes, and insufficient size of the edge specifications. Incomplete information on the content of the certificate, sewing tips or even directly on the stapler.
Safety net price
If the price of raw materials is 12,000 yuan per ton, and the weight of each piece is calculated as 2.3kg, the cost of each piece of qualified dense mesh produced with polyethylene is approximately 42 yuan; the weight of each piece of flat net with 3m width and 6m length is calculated as 7kg. The cost of polyester production is roughly around RMB 120. Different materials, the price changes greatly. For example, the cost of cotton nets is much higher. With high material prices and long service life, users can choose a suitable safety net according to their own situation.
It is difficult for a safety net lower than the above reference price to meet the performance requirements specified by national standards.
Safety net test results
The conditional use unit should do the next test before use. The unit without the test condition can send the safety net to the inspection agency authorized by the provincial or above government department for inspection.
About buying advice
1. In general, the nodes of a woven security network are uniform, and the nodes of a hand-crafted security network are loose. In the event of impact, the nodes are tightened synchronously, which is beneficial to the body's buffer protection for evenly releasing energy. At the same price, woven nets can be preferred.
2. According to the national standard, the impact test is applied to the central part of the safety net. At this time, the side ropes and the tethers of the safety net are evenly distributed. However, when a person accidentally falls, it may fall near the edge of the net. At this time, the force of the side rope and the tether near the impact point is greater than the ideal state in the test state. In the standard test, the side string and the tether may not be broken, but in the real situation it may break, and it is also life-threatening after the second fall. Therefore, users with high security awareness should add provisions for manufacturers to give greater protection requirements in the procurement contract, not just meet the standard requirements.
3. Try to choose a strong manufacturer. You can see the strength of the manufacturers from the aspects of the number of equipment manufacturers, the number of personnel, and the registered capital.
This article is an article of Qingdao Zhongbang Instrument Co., Ltd. If you need to reprint it, be sure to add the source of the description. Reproduce the misappropriation without permission.
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