The large-caliber all-welded pipeline forged steel ball valve produced by the high-pressure valve company of Zigong High-Pressure Valve Co., Ltd. was sent to the national key project - Rizhao-Yizheng crude oil pipeline construction site, marking the company's taking the lead in breaking foreign valve companies in China. The history of caliber all-welded forged steel ball valves monopolizes the field. In 2005, Gao Valve Co., Ltd. was the all-welded pipeline ball valve manufactured for the West-East Pipeline of Huaiwu Railway. It became the first domestically-adopted fully-welded ball valve in China's extremely large-scale construction projects, thus breaking the long-term monopoly of foreign companies in this field. In August last year, Gao Valve Co., Ltd. successfully won the bid for the Rizhao-Yizheng crude oil pipeline project, and once again succeeded in "advancing with the country."
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