Hydraulic power tongs are designed and manufactured in accordance with the People’s Republic of China Petroleum and Natural Gas Industry Standard SY/T5074-2004 "Power Tongs for Oil Drilling and Workover". They are open-ended power tongs and are used for oil loading and unloading during oilfield workover operations. Rods, tubing, casing, insulated pipes, drill pipes and mechanized equipment similar to the thread of the pipe string.
