【Ten Years of Rapid Development in Chemical Processing Equipment】Overall Stamping of EHA6918X208mm Head for 108T PTA Crystallizers from 1170 to 2022

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Looking at the decade-long development of chemical technology, I praise the prosperity and strength of modern China. This is just a starting point to encourage further discussion – more participation will make things even more lively. With you here, HaiChuan becomes even better. [A decade of progress in chemical equipment] – continuous updates and summaries available; feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html Happy National Day! ! ! ----------------------------------------- At 8:30 a.m. on March 26, 2022, the EHA6918X208mm head for Sinopec’s (Yizheng) PTA crystallizer, manufactured by Henan Shenzhou Precision Manufacturing Co., Ltd. (hereinafter referred to as Shenzhou Head), was successfully stamped in its entirety. With a weight of 108 tons and made of 16Mn forged material, this achievement marks another milestone in the stamping production of extremely large and thick head products. The biggest highlights in the successful production of this project by Shenzhou Headings were the innovative design of the molds, as well as the evolution in the method used for separating the mold from the head after its overall stamping. Firstly, the design of the molds focuses on the principles of \"conservation, efficiency, and innovation\", aiming to develop molds that can be used for multiple purposes. This approach overcomes the limitations of traditional casting molds, such as long production times and high material consumption. Through various technical and procedural improvements, existing molds are modified or new molds are created by adding mold shells. This new method reduces the material usage by 50% compared to traditional casting molds, which weigh 200 tons each; as a result, manufacturing costs are reduced – specifically, the cost associated with molds is saved by 1 million yuan – and the time required for mold production is also decreased ； Secondly, for the head portion of this project after overall stamping, a separation method involving lower stripping was adopted. Compared with the previous upper-stripping method, the stripping time was reduced from multiple separations over 3–5 minutes to a single separation within 1 minute. This not only improved efficiency but also enhanced control over the shaping process of the head, providing a reliable prerequisite for subsequent processing steps ； Finally, for the overall stamping production of large-diameter, extra-large, and extra-thick head products, this approach not only changes the traditional method of manufacturing heads in separate sections but also **reduces the time required for preparatory steps during head production, especially welding and assembly before and after the traditional head forming process. This helps to reduce costs for customers while ensuring that project deadlines are met. The successful production of this item represents another milestone for Shenzhou Head Co., following the delivery of the PTA crystallizer EHA6619X203mm head for Hengli Petrochemical (Huizhou), with a weight of 90 tons and made from SA516-70N material. It constitutes yet another demonstration of China’s technical capabilities in manufacturing stamped heads. By overcoming limitations related to diameter, thickness, and weight, this achievement marks a new step forward for Shenzhou Head Co. in achieving its strategic goals of becoming an international, high-end enterprise specializing in advanced materials. It also adds a new chapter to Shenzhou Head Co.’s vision of equipping the world with superior equipment in the future.