Liaoning Provincial Bureau of quality supervision

2022-08-12
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Liaoning Provincial Bureau of quality supervision reported the spot check of wires and cables, and the sampling qualification rate was 95.7%

recently, Liaoning Provincial Bureau of quality supervision organized the quality supervision and spot check of 7 products such as wires and cables and cement. A total of 491 batches of products produced by 408 enterprises were spot checked this time. After inspection, 21 batches of products produced by 18 enterprises were unqualified, and 470 batches of products produced by 390 enterprises were qualified. The qualified rate of product quality sampling was 95.7%

this time, the structural dimensions, physical and mechanical properties, electrical properties, high temperature performance, combustion performance and other items of wire and cable products were inspected. A total of 105 batches of products produced by 78 enterprises were checked, and 6 batches of products produced by 6 enterprises were unqualified. The unqualified items are mainly structural dimensions, physical and mechanical properties, and high temperature performance

this time, the structure and mark verification, mechanical operation verification, protection circuit effectiveness verification and other items of low-voltage electrical appliances (distribution board) products were inspected. A total of 80 batches of products produced by 80 enterprises were checked, and two batches of products produced by two enterprises were unqualified. The unqualified items are the verification of structure and signs, and the verification of the resistance of insulating materials to abnormal heat and fire. The insulation material's ability to withstand abnormal heat and fire is unqualified. Once the insulation material catches fire and causes electric fire during the use of the product, it becomes a fire hazard. The main reason for the disqualification is that individual enterprises do not understand and master the requirements of the national mandatory standards enough, and neglect the annual selection and dynamic publication of product delivery inspection

sulfur trioxide, magnesium oxide, loss on ignition, chloride ion and other items of cement products were tested this time. A total of 174 batches of products produced by 121 enterprises were sampled, and 10 batches of products produced by 7 enterprises were unqualified. The unqualified items are chloride ion and cement strength. Unqualified chloride ions will cause steel bars in concrete to rust easily, thus reducing the overall performance of concrete. The main reason for the disqualification is the addition of mixed materials and admixtures containing high chloride salts. Strength is the project index for determining the strength grade of cement, and it is also the main basis for selecting cement. The main reasons for unqualified are unreasonable batching scheme or lax control and management of clinker calcination process. Individual enterprises shoddy inferior cement and use low strength grade cement as high strength grade cement

the sensory index, evaporation residue, potassium permanganate consumption, methylbenzene diamine, total solvent residue and other items of plastic film bag products were tested this time. A total of 80 batches of products produced by 78 enterprises were randomly selected, and the items inspected met the standard requirements

this supervision and random inspection is based on jt/t "tire disassembly and assembly machine" jt/t "automobile lift" and other standards and relevant requirements, on the idling performance, insulation resistance, voltage resistance, working performance requirements, signs of the tire disassembly and assembly machine products, as well as the synchronization device, insulation performance, grounding resistance, safety performance, maximum lifting height, minimum support surface height from the ground, temperature rise, subsidence The product mark items were inspected. A total of 30 batches of products produced by 30 enterprises were checked, and 3 batches of products produced by 3 enterprises were unqualified. Unqualified items are mainly signs that many mechanical products with high consumption and low efficiency are gradually eliminated in the tire disassembly and assembly market. Signs are an important source for consumers to obtain information. Unqualified items will cause misunderstandings to consumers. The main reasons for unqualified items are that enterprises do not study and understand product standards enough, do not pay enough attention to product details, and do not seriously inspect products before delivery

during the transportation of motor vehicle brake fluid products, the data curve can be obtained, and the data and reports such as dynamic viscosity (-40 ℃, 100 ℃), equilibrium reflux boiling point, wet equilibrium reflux boiling point, etc. can be printed out by ourselves; If you can print out the catheter items of specific geometry according to the specific 3D of individual patients for inspection. A total of 10 batches of products produced by 9 enterprises were spot checked, and the items inspected met the standard requirements

the urea content, density (20 ℃), refractive index and other items of vehicle urea aqueous solution products were tested. A total of 12 batches of products produced by 12 enterprises were spot checked, and the items inspected met the standard requirements

in view of the product quality problems found in this random inspection, the Bureau will organize the post-treatment of unqualified product manufacturers. For the production enterprises whose products are unqualified in this random inspection, the Municipal Quality Supervision (market supervision and management department) where the enterprises are located shall be instructed to carry out post-processing work; Second, timely release post-processing work information. Summarize the information on the results of the work after supervision and random inspection, and publish it in time through various channels such as Provincial Bureau officials and the media

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