1. Working pressure: 2000-15000PSI2. Material grade: AA-FF3. Normial diameter: 2 9/16″ - 5 1/8″4. Temperature grade: LU/PU5. Specification grade: PSL1-PSL36. Performance grade: PR1/PR2Wellhead equipment and Christmas tree are essential for oil and gas exploitation, compassed of casing head, tubing head and Christmas tree, used to connect casing string and tubing string, and seal the annular spaces between all casing at all layers and between pipelines. In addition, it can be used not only to control wellhead pressure and adjust oil/gas wellhead flow, but also for special operations, such as acid fracturing, water injection and testing, etc.The company integrates the research, development, production, and marketing of wellhead assembly, medium-and high-pressure valves, X-mas, well control throttle pipe assembly, instruments, flowmeters, oil rig brake blocks, etc. We have established a complete inspection system and apply entrie-process-control and inspection, from raw materials, semi-finished products to finished product. Focus on the customer and delivery the maximum value for customers as the management concept, positive enterprising to make a greater contribution to the petroleum drilling.