The fifth batch of calcium carbide access companies issued
The China Drying Network Communications Ministry of Industry and Information Technology recently issued a list of the fifth batch of companies that meet the conditions for access to the calcium carbide industry. Eleven companies, including Inner Mongolia Mengwei Technology Co., Ltd. and Zhuozi County Shenghua Chemical Co., Ltd., have passed the certification. The list is recommended by the enterprises and the relevant provincial, autonomous region, and municipality's industrial and informatization authorities in accordance with the Provisions for the Accession of the Calcium Carbide Industry and the Interim Measures for the Administration of the Manufacture of Calcium Carbide Producers and reviewed by the local environmental protection, quality inspection, and safety supervision departments. On the basis of the above, it is determined by the procedures of expert review, online publicity, and expert on-site review.
Generally, the production process of seamless Steel Pipe can be divided into cold rolling and hot rolling. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe. The wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe. But the surface looks brighter than that of thick wall seamless steel pipe. The surface is not too rough, and the diameter is not too much burr.
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