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1.Specify the dimensional accuracy requirements in the contract When signing the purchase contract, the dimensional parameters of the stainless steel strips are specified in detail, including width, thickness, length and the corresponding allowable tolerance range. For example, for a narrow strip with a width of 50mm, the tolerance range can be clearly required to be ±0.1mm; when the thickness is 0.5mm, the tolerance is set to ±0.01mm. At the same time, it is stipulated in the contract that if the product size provided by the supplier exceeds the tolerance range, the supplier shall bear the liability for breach of contract such as return and exchange, compensation for production losses caused by dimensional problems, etc. The supplier can also be required to provide a dimensional inspection report to ensure that it has carried out strict dimensional inspection on each batch of products. 2.Strengthen the inspection link of arrival After the narrow strips arrive, conduct sampling inspection in time. Use high-precision measuring tools, such as micrometer to measure thickness, vernier caliper to measure width, and tape measure to measure length. Take samples according to a certain ratio, such as 5% – 10% of the narrow strips in each batch for testing. If the number of samples is small, the sampling ratio can be appropriately increased. During the inspection process, record the measurement data of each sample and compare it with the size and tolerance range specified in the contract. If unqualified products are found, communicate with the supplier immediately, require them to provide qualified products again, and handle them in accordance with the contract agreement. At the same time, for suppliers who have repeatedly had dimensional accuracy problems, consider changing the cooperation partner to ensure the quality of subsequent purchased products. 3.Establish long-term cooperation and communication mechanism Establish a long-term and stable cooperative relationship with suppliers, and communicate regularly about product quality and dimensional accuracy. During the cooperation process, timely feedback on dimensional problems found during the production process will be provided to encourage suppliers to continuously improve the production process. For example, if a batch of narrow strips is found to have dimensional changes in a specific processing link during use, the cause can be analyzed with the supplier to explore solutions. In addition, suppliers can be required to provide equipment maintenance and calibration records regularly to ensure that their production equipment is always in good operating condition, thus ensuring the dimensional accuracy of stainless steel narrow strips from the source. 4.Choose Hua steel company as your longer reliable and stable supplier Our company have big mill material like Tisco, Tsingshan,Hongwang,Delong(Liyang ),Bao steel .ZPSS.