石油管端部丝扣及其接头丝扣要用保护环保护,以免在运输和存放过程中损坏。保护环的需用量很大,各钢管厂一般都用钢管切成定尺管段,在专用机床或其他车床上加工制造,需要消耗大量原材料和能源. 塔干罗格钢铁厂是苏联生产石油专用管材的主要厂家之一,拥有冶炼、轧钢、轧管、焊管以及钢管加工等各生产车间。该厂曾经和鞍钢 The ends of pipe ends and their joints should be protected by protective rings to avoid damage during transportation and storage. The need for a large amount of guard ring, the steel pipe plant are generally cut into sections with steel pipe, in a special machine or other lathe machining, requires the consumption of large amounts of raw materials and energy.Taganorog Steel Plant is the Soviet Union for the production of oil pipe One of the major manufacturers, with smelting, rolling, pipe rolling, pipe and pipe processing, and other production workshop. The factory had and Anshan Iron and Steel